大家好，又见面了，我是你们的朋友全栈君。

本项目为Java swing项目，在工作环境中基本使用不到，但是很多学校把这个当做编程入门的项目来做，故分享出本项目供初学者参考。

CSDN赞助下载：https://download.csdn.net/download/weixin_44893902/20367467

一、效果演示：

主要功能：

①基本数据维护：
图书类别管理 >> 图书类别添加、图书类别维护
图书管理 >> 图书添加、图书维护
②关于我们

1、登录界面

2、主界面：

3、图书类别维护

4、图书类别添加

5、图书维护

6、图书添加

7、关于我们

可全部缩小到左下角

二、核心代码：

1、Util包 【存放数据库连接工具】

① DBTool（数据库连接工具类）

package cn.ac.azure.util;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;

/** * 数据库连接工具类 * @author 明金同学 * */
public class DBTool { 
   
	private static String driver;  //数据库驱动
	private static String url;  //数据库连接地址
	private static String user; //数据库连接用户
	private static String password;  //数据库连接密码
	
	static{ 
   
		//新建一个properties,用于读取db.properties配置文件
		Properties p=new Properties();
		//新建一个字符串,保存配置文件的路径
		String path="cn//ac//azure//util//db.properties";
		try { 
   
			//调用Properties.load通过类加载获得配置文件的输入流
			p.load(DBTool.class.getClassLoader().getResourceAsStream(path));
			//读取配置文件中的配置参数
			driver=p.getProperty("driver");  //获取驱动
			url=p.getProperty("url");  //获取数据库连接地址
			user=p.getProperty("user");  //获取数据库用户
			password=p.getProperty("password");  //获取数据库密码
			try { 
   
				//加载数据库驱动类到程序中
				Class.forName(driver);
			} catch (ClassNotFoundException e) { 
   
				e.printStackTrace();
				throw new RuntimeException("加载驱动失败",e);
			}
		} catch (IOException e) { 
   
			e.printStackTrace();
			throw new RuntimeException("找不到配置文件",e);
		}
	}
	/** * 获取数据库连接 * @return 数据库连接对象 * @throws SQLException 提醒调用者捕获异常,并在finally中关闭关闭异常 */
	public static Connection getConnetion() throws SQLException{ 
   
		//通过DriverManager获得数据库连接
		return DriverManager.getConnection(url, user, password);
	}
	/** * 关闭数据库连接 * @param con */
	public static void close(Connection con){ 
   
		if(con!=null){ 
    //如果数据连接不为空
			try { 
   
				//关闭数据库连接
				con.close();
			} catch (SQLException e) { 
   
				e.printStackTrace();
				throw new RuntimeException("数据库关闭失败",e);
			}
		}
	}
// /**
// * 测试数据库连接工具是否可用
// * @param args
// */
// public static void main(String[] args) { 
   
// Connection con=null;
// try { 
   
// con=DBTool.getConnetion();
// System.out.println("数据库连接成功!");
// } catch (SQLException e) { 
   
// System.out.println("数据库连接失败!");
// e.printStackTrace();
// }finally{ 
   
// DBTool.close(con);
// }
// }
}

② db.properties（配置文件）

2、model包 【存放实体类】

① Book（图书实体类）

 package cn.ac.azure.model;
/** * 图书实体 * @author 明金同学 * */
public class Book { 
   
	private Integer id;  //图书id
	private String bookName;  //图书名称
	private String author;  //图书作者
	private String sex;     //作者性别
	private Float price;    //图书价格
	private Integer bookTypeId;  //图书类别ID
	private String bookTypeName;  //图书类别名称
	private String bookDesc;  //图书描述
	public Book() { 
   
		super();
	}
	public Book(Integer id, String bookName, String author, String sex, Float price, Integer bookTypeId,
			String bookTypeName, String bookDesc) { 
   
		super();
		this.id = id;
		this.bookName = bookName;
		this.author = author;
		this.sex = sex;
		this.price = price;
		this.bookTypeId = bookTypeId;
		this.bookTypeName = bookTypeName;
		this.bookDesc = bookDesc;
	}
	
	public Integer getId() { 
   
		return id;
	}
	public void setId(Integer id) { 
   
		this.id = id;
	}
	public String getBookName() { 
   
		return bookName;
	}
	public void setBookName(String bookName) { 
   
		this.bookName = bookName;
	}
	public String getAuthor() { 
   
		return author;
	}
	public void setAuthor(String author) { 
   
		this.author = author;
	}
	public String getSex() { 
   
		return sex;
	}
	public void setSex(String sex) { 
   
		this.sex = sex;
	}
	public Float getPrice() { 
   
		return price;
	}
	public void setPrice(Float price) { 
   
		this.price = price;
	}
	public Integer getBookTypeId() { 
   
		return bookTypeId;
	}
	public void setBookTypeId(Integer bookTypeId) { 
   
		this.bookTypeId = bookTypeId;
	}
	public String getBookTypeName() { 
   
		return bookTypeName;
	}
	public void setBookTypeName(String bookTypeName) { 
   
		this.bookTypeName = bookTypeName;
	}
	public String getBookDesc() { 
   
		return bookDesc;
	}
	public void setBookDesc(String bookDesc) { 
   
		this.bookDesc = bookDesc;
	}
	
	@Override
	public String toString() { 
   
		return "Book [测试=" + id + ", bookName=" + bookName + ", author=" + author + ", sex=" + sex + ", price=" + price
				+ ", bookTypeId=" + bookTypeId + ", bookTypeName=" + bookTypeName + ", bookDesc=" + bookDesc + "]";
	}
	
}

② BookType（图书类别实体类）

package cn.ac.azure.model;
/** * 图书类别实体 * @author 明金同学 * */
public class BookType { 
   
	private int id;  //定义ID
	private String bookTypeName;  //定义图书类别名称
	private String bookTypeDesc;  //定义图书类别描述
	//无参构造器
	public BookType() { 
   

	}
	//有参构造函数
	public BookType(String bookTypeName, String bookTypeDesc) { 
   
		super();
		this.bookTypeName = bookTypeName;
		this.bookTypeDesc = bookTypeDesc;
	}
	
	public BookType(int id, String bookTypeName, String bookTypeDesc) { 
   
		super();
		this.id = id;
		this.bookTypeName = bookTypeName;
		this.bookTypeDesc = bookTypeDesc;
	}
	
	public int getId() { 
   
		return id;
	}
	public void setId(int id) { 
   
		this.id = id;
	}
	public String getBookTypeName() { 
   
		return bookTypeName;
	}
	public void setBookTypeName(String bookTypeName) { 
   
		this.bookTypeName = bookTypeName;
	}
	public String getBookTypeDesc() { 
   
		return bookTypeDesc;
	}
	public void setBookTypeDesc(String bookTypeDesc) { 
   
		this.bookTypeDesc = bookTypeDesc;
	}
	@Override
	public String toString() { 
   
		return "BookType [id=" + id + ", bookTypeName=" + bookTypeName + ", bookTypeDesc=" + bookTypeDesc + "]";
	}
}

③ User（用户实体类）

package cn.ac.azure.model;
/** * 用户实体 * @author 明金同学 * */
public class User { 
   
	private int id;              //用户id
	private String username;     //用户名称
	private String password;     //用户密码
	
	public User() { 
   
		
	}
	
	@Override
	public String toString() { 
   
		return "User [id=" + id + ", username=" + username + ", password=" + password + "]";
	}

	public User(String username, String password) { 
   
		super();
		this.username = username;
		this.password = password;
	}

	public int getId() { 
   
		return id;
	}
	public void setId(int id) { 
   
		this.id = id;
	}
	public String getUsername() { 
   
		return username;
	}
	public void setUsername(String username) { 
   
		this.username = username;
	}
	public String getPassword() { 
   
		return password;
	}
	public void setPassword(String password) { 
   
		this.password = password;
	}
	
}

3、Dao包 【数据库访问层】

① BookDao（图书dao类）

package cn.ac.azure.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import cn.ac.azure.model.Book;

/** * 图书dao类 * @author 明金同学 * */
public class BookDao { 
   
	/** * 图书添加 * @param con 数据库库连接对象 * @param book 添加的图书对象 * @return 返回添加操作的数据库记录数 * @throws SQLException 抛出数据库异常 */
	public int add(Connection con,Book book) throws SQLException{ 
   
		//拼写sql插入语句
		String sql="insert into t_book values(null,'"+book.getBookName()+"','"+book.getAuthor()+"','"+book.getSex()+"','"+book.getPrice()+"','"+book.getBookTypeId()+"','"+book.getBookTypeName()+"','"+book.getBookDesc()+"')";
		System.out.println(sql);
		//获得预编译对象ps
		
		PreparedStatement ps=con.prepareStatement(sql);
		//设置ps参数
		/*ps.setString(1,book.getBookName()); //设置图书名称 ps.setString(2,book.getAuthor()); //设置图书作者 ps.setString(3, book.getSex()); //设置作者性别 ps.setFloat(4, book.getPrice()); //设置图书价格 ps.setInt(5, book.getBookTypeId()); //设置图书类别ID ps.setString(6, book.getBookDesc()); //设置图书描述 */		//执行sql语句，并返回插入的记录数
		return ps.executeUpdate();
	}
	/** * 图书查询 * @param con 数据库连接对象 * @param book 图书对象 * @return 查询的结果集 * @throws SQLException 抛出数据库异常 */
	public ResultSet search(Connection con,Book book) throws SQLException{ 
   
		//定义图书名称
		String bookName=null;
		//定义图书作者
		String author=null;
		//定义图书类别名称
		String bookTypeName=null;
		//如果图书不为空的话，就为前三个字段赋值，按照条件查询
		if(book!=null){ 
   
			bookName=book.getBookName();
			author=book.getAuthor();
			bookTypeName=book.getBookTypeName();
		}
		//定义一个字符串缓冲对象类存储查询添加
		StringBuilder sb=new StringBuilder("select * from t_book b , t_bookType bt where b.bookTypeId=bt.id ");
		//查询条件有图书名称
		if(!(bookName==null || "".equals(bookName.trim()))){ 
   
			sb.append("and b.bookName like '%"+bookName+"%' ");
		}
		//查询条件有图书作者
		if(!(author==null || "".equals(author.trim()))){ 
   
			sb.append("and b.author like '%"+author+"%' ");
		}
		//查询条件有图书类别名称
		if(!(bookTypeName==null || "".equals(bookTypeName.trim()))){ 
   
			sb.append("and bt.bookTypeName like '%"+bookTypeName+"%' ");
		}
		//从sb生成sql语句
		String sql=sb.toString();
		//获取预处理对象
		PreparedStatement ps=con.prepareStatement(sql);
		//执行查询，并返回结果集
		return ps.executeQuery();
	}
	/** * 图书修改 * @param con 数据库连接对象 * @param book 修改的图书对象 * @return 返回修改改变的记录数 * @throws SQLException 抛出数据库异常，同时提醒调用者关闭数据库 */
	public int update(Connection con,Book book) throws SQLException{ 
   
		//编写sql语句
		String sql="update t_book set bookName=?,author=?,sex=?,"
				+ "price=?,bookTypeId=?,bookDesc=? where id=?";
		//获取预编译对象ps
		PreparedStatement ps=con.prepareStatement(sql);
		//设置ps对象 
		ps.setString(1, book.getBookName()); //图书名称
		ps.setString(2, book.getAuthor());   //图书作者
		ps.setString(3,book.getSex()); //作者性别
		ps.setFloat(4, book.getPrice()); //图书价格
		ps.setInt(5, book.getBookTypeId());  //图书类型Id
		ps.setString(6, book.getBookDesc()); //图书描述
		ps.setInt(7, book.getId());
		//执行修改并返回改变的记录数
		return ps.executeUpdate(); 
	}
	
	/** * 图书删除 * @param con 数据库连接对象 * @param id 删除图书的id * @return 返回删除的记录数 * @throws SQLException 抛出数据库异常，同时提醒调用者关闭数据库 */
	public int delete(Connection con,int id) throws SQLException{ 
   
		//编写sql语句
		String sql="delete from t_book where id=?";
		//获取预编译对象ps
		PreparedStatement ps=con.prepareStatement(sql);
		//设置ps参数
		ps.setInt(1, id);
		//执行DML删除语句并返回删除的记录数
		return ps.executeUpdate();
	}
}

② BookTypeDao（图书类别dao类）

package cn.ac.azure.dao;


import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import cn.ac.azure.model.BookType;

/** * 图书类别dao类 * @author 明金同学 * */
public class BookTypeDao { 
   
	/** * 图书类别添加 * @param con 数据库连接对象 * @param bookType 要添加的图书类别 * @return 返回数据库操作的记录数 * @throws SQLException */
	public int add(Connection con,BookType bookType) throws SQLException{ 
   
		//拼写sql插入语句
		String sql="insert into t_bookType values(null,?,?)";
		//创建预编译对象ps
		PreparedStatement ps=con.prepareStatement(sql);
		//设置ps参数
		ps.setString(1, bookType.getBookTypeName()); //设置bookTypeName
		ps.setString(2, bookType.getBookTypeDesc()); //设置bookTypeDesc
		//返回数据库操作的记录数
		return ps.executeUpdate();
	}
	/** * 图书类别查询 * @param con 数据库连接对象 * @param bookType 查询的图书类别 * @return 返回查询的结果集 * @throws SQLException 抛出数据库异常 */
	public ResultSet search(Connection con,BookType bookType) throws SQLException{ 
   
		/* * 思路：当jdbc查询数据库有多个条件从外部输入时，这是最好创建一个字符串缓冲类来添加条件到sql语句中。 * 同时，不知道有哪些条件是第一条件，无法确定where关键字的所在，于是添加条件都用（and 条件） * 最后字符串转换成字符串时在将第一个and替换成where */
		//定义一个图书类别名称
		String bookTypeName=null;
		if(bookType!=null){ 
    //如果类别对象不为空的话，就获取它的类别名称
			bookTypeName=bookType.getBookTypeName();
		}
		//创建一个字符串缓冲类
		StringBuilder sb=new StringBuilder("select * from t_bookType");
		//添加查询语句的条件（and + 条件）
		if(!(bookTypeName==null || "".equals(bookTypeName.trim()))){ 
   
			//jdbc中，数据库字符串要用单引号括起来
			sb.append(" and bookTypeName like '%"+bookType.getBookTypeName()+"%'");
		}
		//将字符串缓冲对象转换成字符串，同时把第一个and替换成where
		String sql=sb.toString().replaceFirst("and", "where");   
		//获取预编译对象
		PreparedStatement ps=con.prepareStatement(sql);
		//返回ps执行查询之后的结果集
		return ps.executeQuery();
	}
	/** * 图书类别修改 * @param con 数据路连接对象 * @param bookType 要修改的图书类别 * @return 返回数据库更新的记录数 * @throws SQLException 抛出数据库异常 */
	public int update(Connection con,BookType bookType) throws SQLException{ 
   
		//拼写sql更新语句
		String sql="update t_bookType set bookTypeName=? , bookTypeDesc=? where id=?";
		//获取预编译对象ps
		PreparedStatement ps=con.prepareStatement(sql);
		//设置ps参数
		ps.setString(1,bookType.getBookTypeName());
		ps.setString(2,bookType.getBookTypeDesc());
		ps.setInt(3, bookType.getId());
		//赶回ps更新数据库的记录数
		return ps.executeUpdate();
	}
	/** * 删除数据库记录 * @param con 数据库连接对象 * @param id 传入删除记录的id * @return 返回删除的记录数 * @throws SQLException 抛出数据库异常 */
	public int delete(Connection con,String id) throws SQLException{ 
   
		//拼写sql删除语句
		String sql="delete from t_bookType where id=?";
		//获取预编译对象ps
		PreparedStatement ps=con.prepareStatement(sql);
		//设置ps参数
		ps.setString(1, id);
		//执行ps更行操作，并返回改变的数据记录条数
		return ps.executeUpdate();
	}
}

③ UserDao（用户数据访问对象）

package cn.ac.azure.dao;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import cn.ac.azure.model.User;

/** * 用户数据访问对象 * @author 明金同学 * */
public class UserDao { 
   
	/** * 登录验证 * @param con 数据库连接对象 * @param user 登录的账户 * @return 返回一个用户对象,为null,则登录失败;反之,则登录成功 * @throws Exception 让调用者处理异常 */
	public User login(Connection con,User user) throws SQLException{ 
   
		//定义一个返回用户对象
		User resultUser=null;
		//拼写sql查询语句
		String sql="select * from t_user where username=? and password=?";
		//获取sql语句预编译对象
		PreparedStatement ps=con.prepareStatement(sql);
		//设置ps参数
		ps.setString(1, user.getUsername());
		ps.setString(2, user.getPassword());
		//ps执行sql查询语句返回结果集
		ResultSet rs=ps.executeQuery();
		//遍历结果集
		while(rs.next()){ 
   
			//初始化返回用户对象
			resultUser=new User(); 
			resultUser.setId(rs.getInt("id"));    //设置用户id
			resultUser.setUsername(rs.getString("username"));  //设置用户名称
			resultUser.setPassword(rs.getString("password"));  //设置用户密码
		}
		//返回用户对象
		return resultUser;
	}
}

4、View包 【视图层】

① LoginFrame（登录界面）

package cn.ac.azure.view;

import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.SQLException;

import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;

import cn.ac.azure.dao.UserDao;
import cn.ac.azure.model.User;
import cn.ac.azure.util.DBTool;

public class LoginFrame extends JFrame { 
   
	static { 
   
		try { 
   
			// 这里是皮肤包可以随意切换
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.mcwin.McWinLookAndFeel");
			 javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.smart.SmartLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.luna.LunaLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.aluminium.AluminiumLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.bernstein.BernsteinLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.hifi.HiFiLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.aero.AeroLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.mint.MintLookAndFeel");
		} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
				| UnsupportedLookAndFeelException e) { 
   
			e.printStackTrace();
		}
	}
	

	private JPanel contentPane;
	private JTextField usernameText;
	private JPasswordField passwordText;
	private JButton loginBtn;
	private JButton resetBtn;


	/** * Launch the application. */
	public static void main(String[] args) { 
   
		EventQueue.invokeLater(new Runnable() { 
   
			public void run() { 
   
				try { 
   
					LoginFrame frame = new LoginFrame();
					frame.setVisible(true);
				} catch (Exception e) { 
   
					e.printStackTrace();
				}
			}
		});
	}
	/** * Create the frame. */
	public LoginFrame() { 
   
		//改变系统默认字体
		Font font = new Font("Dialog", Font.PLAIN, 12);
		java.util.Enumeration<Object> keys = UIManager.getDefaults().keys();
		while (keys.hasMoreElements()) { 
   
			Object key = keys.nextElement();
			Object value = UIManager.get(key);
			if (value instanceof javax.swing.plaf.FontUIResource) { 
   
				UIManager.put(key, font);
			}
		}
		setIconImage(Toolkit.getDefaultToolkit().getImage(LoginFrame.class.getResource("/images/logo.png")));
		setResizable(false);
		setTitle("管理员登录");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 450, 300);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		
		JLabel lblNewLabel = new JLabel("\u56FE\u4E66\u7BA1\u7406\u7CFB\u7EDF");
		lblNewLabel.setFont(new Font("宋体", Font.BOLD, 22));
		lblNewLabel.setIcon(new ImageIcon(LoginFrame.class.getResource("/images/logo.png")));
		
		JLabel lblNewLabel_1 = new JLabel("用户名 :");
		lblNewLabel_1.setIcon(new ImageIcon(LoginFrame.class.getResource("/images/userName.png")));
		
		usernameText = new JTextField();
		usernameText.setColumns(10);
		
		JLabel lblNewLabel_2 = new JLabel("密 码 :");
		lblNewLabel_2.setIcon(new ImageIcon(LoginFrame.class.getResource("/images/password.png")));
		
		passwordText = new JPasswordField();
		
		//添加登陆按钮
		loginBtn = new JButton("登录");
		loginBtn.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				loginActionPerformed(e);
			}
		});
		loginBtn.setIcon(new ImageIcon(LoginFrame.class.getResource("/images/login.png")));
		
		//添加重置按钮
		resetBtn = new JButton("重置");
		resetBtn.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				resetActionPerformed(e);
			}
		});
		
		resetBtn.setIcon(new ImageIcon(LoginFrame.class.getResource("/images/reset.png")));
		GroupLayout gl_contentPane = new GroupLayout(contentPane);
		gl_contentPane.setHorizontalGroup(
			gl_contentPane.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_contentPane.createSequentialGroup()
					.addGap(106)
					.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
						.addComponent(lblNewLabel)
						.addGroup(gl_contentPane.createSequentialGroup()
							.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
								.addGroup(gl_contentPane.createSequentialGroup()
									.addPreferredGap(ComponentPlacement.RELATED)
									.addComponent(lblNewLabel_1)
									.addPreferredGap(ComponentPlacement.RELATED)
									.addComponent(usernameText, GroupLayout.PREFERRED_SIZE, 142, GroupLayout.PREFERRED_SIZE))
								.addGroup(gl_contentPane.createSequentialGroup()
									.addComponent(lblNewLabel_2)
									.addPreferredGap(ComponentPlacement.UNRELATED)
									.addComponent(passwordText, GroupLayout.PREFERRED_SIZE, 144, GroupLayout.PREFERRED_SIZE))
								.addGroup(Alignment.TRAILING, gl_contentPane.createSequentialGroup()
									.addGap(16)
									.addComponent(loginBtn)
									.addPreferredGap(ComponentPlacement.RELATED, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
									.addComponent(resetBtn)))
							.addPreferredGap(ComponentPlacement.RELATED)))
					.addContainerGap(105, GroupLayout.PREFERRED_SIZE))
		);
		gl_contentPane.setVerticalGroup(
			gl_contentPane.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_contentPane.createSequentialGroup()
					.addGap(25)
					.addComponent(lblNewLabel)
					.addGap(18)
					.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
						.addComponent(lblNewLabel_1)
						.addComponent(usernameText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addGap(18)
					.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
						.addComponent(lblNewLabel_2)
						.addComponent(passwordText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addGap(29)
					.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
						.addComponent(loginBtn)
						.addComponent(resetBtn))
					.addContainerGap())
		);
		contentPane.setLayout(gl_contentPane);
		//设置窗口居中
		this.setLocationRelativeTo(null);
	}
	/** * 登录事件处理 * @param evt */
	private void loginActionPerformed(ActionEvent evt) { 
   
		//从输入框获取用户名
		String username=usernameText.getText().trim();
		//从输入框获取密码
		String password=passwordText.getText().trim();
		//用户名不能为空或空字符串,否则结束事件处理
		if(username==null || "".equals(username)){ 
   
			JOptionPane.showMessageDialog(null, "用户名不能为空");
			return;
		}
		//用户名不能为空或空字符串否则结束事件处理
		if(password==null || "".equals(password)){ 
   
			JOptionPane.showMessageDialog(null, "密码不能为空");
			return;
		}
		//将从输入框获得信息新建一个对象
		User user=new User(username, password);
		//定义数据库连接
		Connection con=null;
		try { 
   
			//利用数据库工具类获取数据库连接
			con=DBTool.getConnetion();
			//新建一个用户数据访问对象
			UserDao userDao=new UserDao();
			//调用其登录验证方法获取一个用户对象
			User currUser=userDao.login(con, user);
			//判断返回的用户对象
			if(currUser!=null){ 
   //不为空,表示登录成功
				//进入主界面,并设置可见
				new MainFrame().setVisible(true);
				//释放当前窗口资源
				dispose();
			}else{ 
    //为空,表示登录不成功
				JOptionPane.showMessageDialog(null, "登录失败(u_u)");
			}
		} catch (SQLException e) { 
   
			e.printStackTrace();
			throw new RuntimeException("登录失败",e);
		}finally{ 
   
			//关闭数据库连接
			DBTool.close(con);
		}
	}
	/** * 重置事件处理 * @param evt */
	private void resetActionPerformed(ActionEvent evt) { 
   
		usernameText.setText("");
		passwordText.setText("");
	}
}

② MainFrame（主界面）

package cn.ac.azure.view;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;

import javax.swing.ImageIcon;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class MainFrame extends JFrame { 
   
	static { 
   
		try { 
   
			// 这里是皮肤包可以随意切换
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.mcwin.McWinLookAndFeel");
			 javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.smart.SmartLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.luna.LunaLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.aluminium.AluminiumLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.bernstein.BernsteinLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.hifi.HiFiLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.aero.AeroLookAndFeel");
// javax.swing.UIManager.setLookAndFeel("com.jtattoo.plaf.mint.MintLookAndFeel");
		} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
				| UnsupportedLookAndFeelException e) { 
   
			e.printStackTrace();
		}
	}
	
	private static final long serialVersionUID = 1L;
	
	//定义内容窗格
	private JPanel contentPane;
	//定义桌面窗格
	private JDesktopPane table;

	/** * Launch the application. */
	public static void main(String[] args) { 
   
		EventQueue.invokeLater(new Runnable() { 
   
			public void run() { 
   
				try { 
   
					MainFrame frame = new MainFrame();
					frame.setVisible(true);
				} catch (Exception e) { 
   
					e.printStackTrace();
				}
			}
		});
	}

	/** * Create the frame. */
	public MainFrame() { 
   
		
		//改变系统默认字体
		Font font = new Font("Dialog", Font.PLAIN, 12);
		java.util.Enumeration<Object> keys = UIManager.getDefaults().keys();
		while (keys.hasMoreElements()) { 
   
			Object key = keys.nextElement();
			Object value = UIManager.get(key);
			if (value instanceof javax.swing.plaf.FontUIResource) { 
   
				UIManager.put(key, font);
			}
		}
		
		
		setTitle("\u56FE\u4E66\u7BA1\u7406\u7CFB\u7EDF\u4E3B\u754C\u9762");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 450, 300);
		
		JMenuBar menuBar = new JMenuBar();
		menuBar.setToolTipText("");
		setJMenuBar(menuBar);
		
		JMenu menu = new JMenu("\u57FA\u672C\u6570\u636E\u7EF4\u62A4 ");
		menu.setIcon(new ImageIcon(MainFrame.class.getResource("/images/base.png")));
		menuBar.add(menu);
		
		JMenu mnNewMenu = new JMenu("\u56FE\u4E66\u7C7B\u522B\u7BA1\u7406 ");
		mnNewMenu.setIcon(new ImageIcon(MainFrame.class.getResource("/images/bookTypeManager.png")));
		menu.add(mnNewMenu);
		
		//图书类别添加
		JMenuItem menuItem = new JMenuItem("\u56FE\u4E66\u7C7B\u522B\u6DFB\u52A0");
		menuItem.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				BookTypeAddInterFrame bookTypeAddInterFrame=new BookTypeAddInterFrame();
				bookTypeAddInterFrame.setVisible(true);
				table.add(bookTypeAddInterFrame);
			}
		});
		menuItem.setIcon(new ImageIcon(MainFrame.class.getResource("/images/add.png")));
		mnNewMenu.add(menuItem);
		
		//图书类别维护
		JMenuItem menuItem_1 = new JMenuItem("\u56FE\u4E66\u7C7B\u522B\u7EF4\u62A4");
		menuItem_1.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				BookTypeManageInterFrame bookTypeManageInterFrame=new BookTypeManageInterFrame();
				bookTypeManageInterFrame.setVisible(true);
				table.add(bookTypeManageInterFrame);
			}
		});
		menuItem_1.setIcon(new ImageIcon(MainFrame.class.getResource("/images/edit.png")));
		mnNewMenu.add(menuItem_1);
		
		JMenu menu_1 = new JMenu("\u56FE\u4E66\u7BA1\u7406");
		menu_1.setIcon(new ImageIcon(MainFrame.class.getResource("/images/bookManager.png")));
		menu.add(menu_1);
		
		//图书添加
		JMenuItem menuItem_2 = new JMenuItem("\u56FE\u4E66\u6DFB\u52A0");
		menuItem_2.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				BookAddInterFrame bookAddInterFrame=new BookAddInterFrame();
				bookAddInterFrame.setVisible(true);
				table.add(bookAddInterFrame);
			}
		});
		menuItem_2.setIcon(new ImageIcon(MainFrame.class.getResource("/images/add.png")));
		menu_1.add(menuItem_2);
		//图书维护
		JMenuItem menuItem_3 = new JMenuItem("\u56FE\u4E66\u7EF4\u62A4");
		menuItem_3.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				BookManageInterFrame bookManageInterFrame=new BookManageInterFrame();
				bookManageInterFrame.setVisible(true);
				table.add(bookManageInterFrame);
			}
		});
		menuItem_3.setIcon(new ImageIcon(MainFrame.class.getResource("/images/edit.png")));
		menu_1.add(menuItem_3);
		
		//安全退出
		JMenuItem menuItem_4 = new JMenuItem("\u5B89\u5168\u9000\u51FA");
		menuItem_4.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				//弹出退出确认提示框
				int res=JOptionPane.showConfirmDialog(null, "确定要退出吗？");
				//确定退出
				if(res==JOptionPane.OK_OPTION){ 
   
					dispose();
				} 
				//否则继续留在该界面
			}
		});
		menuItem_4.setIcon(new ImageIcon(MainFrame.class.getResource("/images/exit.png")));
		menu.add(menuItem_4);
		
		JMenu menu_2 = new JMenu("\u5173\u4E8E\u6211\u4EEC");
		menu_2.setIcon(new ImageIcon(MainFrame.class.getResource("/images/about.png")));
		menuBar.add(menu_2);
		
		//关于我们
		JMenuItem menuItem_5 = new JMenuItem("\u5173\u4E8E\u6211\u4EEC");
		menuItem_5.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				//新建一个图书内部窗体
				LibraryInterFrame libraryInnerFrame=new LibraryInterFrame();
				//显示图书内部窗体
				libraryInnerFrame.setVisible(true);
				//将图书内部窗体显示到主界面桌面窗格中
				table.add(libraryInnerFrame);
			}
		});
		menuItem_5.setIcon(new ImageIcon(MainFrame.class.getResource("/images/about.png")));
		menu_2.add(menuItem_5);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		contentPane.setLayout(new BorderLayout(0, 0));
		setContentPane(contentPane);
		
		//定义主界面桌面窗格界面，用于装载内部窗体
		table = new JDesktopPane();
		table.setBackground(Color.LIGHT_GRAY);
		contentPane.add(table, BorderLayout.CENTER);
		//设置窗口最大化
		setExtendedState(JFrame.MAXIMIZED_BOTH);
	}
}

③ BookTypeManageInterFrame（图书类别管理界面）

package cn.ac.azure.view;

import java.awt.EventQueue;
import java.awt.Font;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;

import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.table.DefaultTableModel;

import cn.ac.azure.dao.BookTypeDao;
import cn.ac.azure.model.BookType;
import cn.ac.azure.util.DBTool;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JPanel;
import javax.swing.border.LineBorder;
import javax.swing.border.TitledBorder;
import javax.swing.JTextArea;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class BookTypeManageInterFrame extends JInternalFrame { 
   
	private JTextField s_bookTypeNameText;
	private JTable bookTypeTable;
	private BookTypeDao bookTypeDao=new BookTypeDao();
	private JTextField idText;
	private JTextField bookTypeNameText;
	private JTextArea bookTypeDescText;
	/** * Launch the application. */
	public static void main(String[] args) { 
   
		EventQueue.invokeLater(new Runnable() { 
   
			public void run() { 
   
				try { 
   
					BookTypeManageInterFrame frame = new BookTypeManageInterFrame();
					frame.setVisible(true);
				} catch (Exception e) { 
   
					e.printStackTrace();
				}
			}
		});
	}

	/** * Create the frame. */
	public BookTypeManageInterFrame() { 
   
		
		//改变系统默认字体
		Font font = new Font("Dialog", Font.PLAIN, 12);
		java.util.Enumeration keys = UIManager.getDefaults().keys();
		while (keys.hasMoreElements()) { 
   
			Object key = keys.nextElement();
			Object value = UIManager.get(key);
			if (value instanceof javax.swing.plaf.FontUIResource) { 
   
				UIManager.put(key, font);
			}
		}
		setIconifiable(true);
		setClosable(true);
		setTitle("图书类别管理");
		setBounds(400, 100, 535, 489);
		
		JScrollPane scrollPane = new JScrollPane();
		
		JLabel label = new JLabel("图书类别名称：");
		
		s_bookTypeNameText = new JTextField();
		s_bookTypeNameText.setColumns(10);
		
		//查询按钮
		JButton searchBtn = new JButton("查询");
		searchBtn.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				searchActionPerformed(e);
			}
		});
		searchBtn.setIcon(new ImageIcon(BookTypeManageInterFrame.class.getResource("/images/search.png")));
		
		JPanel panel = new JPanel();
		panel.setBorder(new TitledBorder(null, "\u8868\u5355\u64CD\u4F5C", TitledBorder.LEADING, TitledBorder.TOP, null, null));
		GroupLayout groupLayout = new GroupLayout(getContentPane());
		groupLayout.setHorizontalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(56)
					.addComponent(label)
					.addPreferredGap(ComponentPlacement.UNRELATED)
					.addComponent(s_bookTypeNameText, GroupLayout.PREFERRED_SIZE, 167, GroupLayout.PREFERRED_SIZE)
					.addPreferredGap(ComponentPlacement.RELATED, 54, Short.MAX_VALUE)
					.addComponent(searchBtn)
					.addGap(71))
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(36)
					.addGroup(groupLayout.createParallelGroup(Alignment.TRAILING, false)
						.addComponent(panel, Alignment.LEADING, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
						.addComponent(scrollPane, Alignment.LEADING))
					.addContainerGap(31, Short.MAX_VALUE))
		);
		groupLayout.setVerticalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(27)
					.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)
						.addComponent(searchBtn)
						.addComponent(label)
						.addComponent(s_bookTypeNameText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addGap(18)
					.addComponent(scrollPane, GroupLayout.PREFERRED_SIZE, 167, GroupLayout.PREFERRED_SIZE)
					.addGap(18)
					.addComponent(panel, GroupLayout.DEFAULT_SIZE, 194, Short.MAX_VALUE)
					.addContainerGap())
		);
		
		JLabel label_1 = new JLabel("编号：");
		
		idText = new JTextField();
		idText.setEditable(false);
		idText.setColumns(10);
		
		JLabel label_2 = new JLabel("图书类别名称：");
		
		bookTypeNameText = new JTextField();
		bookTypeNameText.setColumns(10);
		
		JLabel label_3 = new JLabel("描述：");
		
		bookTypeDescText = new JTextArea();
		
		//修改按钮
		JButton modifyBtn = new JButton("修改");
		modifyBtn.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				bookTypeUpdateActionPerformed(e);
			}
		});
		modifyBtn.setIcon(new ImageIcon(BookTypeManageInterFrame.class.getResource("/images/modify.png")));
		
		//删除按钮
		JButton deleteBtn = new JButton("删除");
		deleteBtn.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				bookTypeDeleteActionPerformed(e);
			}
		});
		deleteBtn.setIcon(new ImageIcon(BookTypeManageInterFrame.class.getResource("/images/delete.png")));
		GroupLayout gl_panel = new GroupLayout(panel);
		gl_panel.setHorizontalGroup(
			gl_panel.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel.createSequentialGroup()
					.addGap(19)
					.addGroup(gl_panel.createParallelGroup(Alignment.TRAILING)
						.addGroup(Alignment.LEADING, gl_panel.createSequentialGroup()
							.addComponent(label_1)
							.addPreferredGap(ComponentPlacement.RELATED)
							.addComponent(idText, GroupLayout.PREFERRED_SIZE, 47, GroupLayout.PREFERRED_SIZE)
							.addGap(18)
							.addComponent(label_2)
							.addPreferredGap(ComponentPlacement.UNRELATED)
							.addComponent(bookTypeNameText, GroupLayout.PREFERRED_SIZE, 166, GroupLayout.PREFERRED_SIZE))
						.addGroup(Alignment.LEADING, gl_panel.createSequentialGroup()
							.addComponent(label_3)
							.addPreferredGap(ComponentPlacement.RELATED)
							.addComponent(bookTypeDescText))
						.addGroup(gl_panel.createSequentialGroup()
							.addComponent(modifyBtn)
							.addGap(54)
							.addComponent(deleteBtn)
							.addGap(64)))
					.addContainerGap(56, GroupLayout.PREFERRED_SIZE))
		);
		gl_panel.setVerticalGroup(
			gl_panel.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel.createSequentialGroup()
					.addContainerGap()
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_1)
						.addComponent(idText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_2)
						.addComponent(bookTypeNameText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addGap(27)
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_3)
						.addComponent(bookTypeDescText, GroupLayout.PREFERRED_SIZE, 51, GroupLayout.PREFERRED_SIZE))
					.addGap(18)
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(deleteBtn)
						.addComponent(modifyBtn))
					.addContainerGap(GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
		);
		panel.setLayout(gl_panel);
		
		//表格
		bookTypeTable = new JTable();
		//表格鼠标点击事件
		bookTypeTable.addMouseListener(new MouseAdapter() { 
   
			@Override
			public void mousePressed(MouseEvent e) { 
   
				bookTypeTableMousePressed(e);
			}
		});
		bookTypeTable.setModel(new DefaultTableModel(
			new Object[][] { 
   
			},
			new String[] { 
   
				"编号", "图书类别名称", "图书类别描述"
			}
		) { 
   
			boolean[] columnEditables = new boolean[] { 
   
				false, false, false
			};
			public boolean isCellEditable(int row, int column) { 
   
				return columnEditables[column];
			}
		});
		bookTypeTable.getColumnModel().getColumn(1).setPreferredWidth(96);
		bookTypeTable.getColumnModel().getColumn(2).setPreferredWidth(185);
		scrollPane.setViewportView(bookTypeTable);
		getContentPane().setLayout(groupLayout);
		
		//设置文本域边框
		bookTypeDescText.setBorder(new LineBorder(new java.awt.Color(127,157,185), 1, false));
		//构造函数中调用填充表格数据函数，全部图书类别显示在表格中
		fillTable(new BookType());
	}
	/** * 图书类别删除事件处理 * @param evt */
	private void bookTypeDeleteActionPerformed(ActionEvent evt) { 
   
		//获得表单中编号的值id
		String id=idText.getText();
		//判断表单有没有选中的图书类别记录
		if(id==null || "".equals(id.trim())){ 
   
			JOptionPane.showMessageDialog(null, "请选择要修改的记录！");
			return;
		}
		//弹出确认框，是否要删除图书类别记录
		int res=JOptionPane.showConfirmDialog(null, "你确定要删除该条记录吗？");
		if(res!=0){ 
    //否
			return; //结束该事件处理函数
		}
		//定义数据库连接
		Connection con=null;
		try { 
   
			//获取数据路连接
			con=DBTool.getConnetion();
			int row=bookTypeDao.delete(con, id);
			if(row==1){ 
   //删除成功，弹出提示框
				JOptionPane.showMessageDialog(null, "修改数据成功(n_n)");
				//清空表单数据
				resetValue();
				//刷新表格记录显示
				fillTable(new BookType());
			}else{ 
   //删除失败，弹出提示框
				JOptionPane.showMessageDialog(null, "修改数据失败(u_u)");
			}
		} catch (SQLException e) { 
   
			//记录日志
			e.printStackTrace();
			throw new RuntimeException("删除记录失败！",e);
		}finally{ 
   
			//关闭数据库
			DBTool.close(con);
		}
	}

	/** * 图书类别修改事件处理 * @param evt */
	private void bookTypeUpdateActionPerformed(ActionEvent evt) { 
   
		//获取表单操作各个文本框的值
		String id=idText.getText();
		String bookTypeName=bookTypeNameText.getText();
		String bookTypeDesc=bookTypeDescText.getText();
		//判断表单有没有选中的图书类别记录
		if(id==null || "".equals(id.trim())){ 
   
			JOptionPane.showMessageDialog(null, "请选择要修改的记录！");
			return;
		}
		//图书类别名称不能为空
		if(bookTypeName==null || "".equals(bookTypeName.trim())){ 
   
			JOptionPane.showMessageDialog(null, "图书类别名称不能为空！");
			return;
		}
		//利用表单的数据新建一个图书类别对象
		BookType bookType=new BookType(Integer.parseInt(id), bookTypeName, bookTypeDesc);
		//定义数据库连接对象
		Connection con=null;
		try { 
   
			//获取数据库连接
			con=DBTool.getConnetion();
			//执行图书类别dao类的修改记录方法
			int res=bookTypeDao.update(con, bookType);
			if(res==1){ 
   //修改成功，弹出提示框
				JOptionPane.showMessageDialog(null, "修改数据成功(n_n)");
				//清空表单数据
				resetValue();
				//刷新表格记录显示
				fillTable(new BookType());
			}else{ 
   //修改失败，弹出提示框
				JOptionPane.showMessageDialog(null, "修改数据失败(u_u)");
			}
		} catch (SQLException e) { 
   
			//记录日志
			e.printStackTrace();
			throw new RuntimeException("修改图书类别失败",e);
		}finally{ 
   
			//关闭数据路连接
			DBTool.close(con);
		}
	}

	/** * 表格鼠标点击事件处理 * @param e */
	private void bookTypeTableMousePressed(MouseEvent e) { 
   
		//获取表格选中的行
		int row=bookTypeTable.getSelectedRow();
		//获取表中选中行的第一列的值并显示在idText框中
		idText.setText(String.valueOf(bookTypeTable.getValueAt(row, 0)));
		//获取表中选中行的第二列的值并显示在bookTypeNameText框中
		bookTypeNameText.setText((String)bookTypeTable.getValueAt(row, 1));
		//获取表中选中行的第三列的值并显示在bookTypeDescText框中
		bookTypeDescText.setText((String)bookTypeTable.getValueAt(row, 2));
	}

	/** * 图书类别查询事件处理 * @param evt */
	private void searchActionPerformed(ActionEvent evt) { 
   
		//获取图书类别输入框里的内容
		String s_bookTypeName=s_bookTypeNameText.getText();
		//新建一个图书类别并初始化
		BookType bookType=new BookType();
		//将输入框的内容设置成新建图书类别的图书类别名称
		bookType.setBookTypeName(s_bookTypeName);
		//根据图书类别查询图书类别
		fillTable(bookType);
	}

	/** * 在表格中填充数据 * @param bookType 传入bookType对象 */
	private void fillTable(BookType bookType){ 
   
		//获取表格的模型
		DefaultTableModel dtm=(DefaultTableModel) bookTypeTable.getModel();
		//清空表格
		dtm.setRowCount(0); 
		//定义数据库连接
		Connection con=null;
		try { 
   
			//获取数据库连接
			con=DBTool.getConnetion();
			//调用BookTyPeDao的查询方法，并获得其查询的结果集
			ResultSet rs=bookTypeDao.search(con, bookType);
			//遍历结果集
			while(rs.next()){ 
   
				//新建一个vector并初始化
				Vector v=new Vector(); 
				v.add(rs.getInt("id"));  //向vector中添加id
				v.add(rs.getString("bookTypeName")); //向vector中添加bookTypeName
				v.add(rs.getString("bookTypeDesc"));  //向vector中添加bookTypeDesc
				//将vector中的数据显示到表格中
				dtm.addRow(v);
			}
		} catch (SQLException e) { 
   
			//记录日志
			e.printStackTrace();
			throw new RuntimeException("查询失败");
		}finally{ 
   
			//关闭数据库
			DBTool.close(con);
		}
	}
	/** * 清空表单数据 */
	private void resetValue(){ 
   
		idText.setText("");
		bookTypeNameText.setText("");
		bookTypeDescText.setText("");
		s_bookTypeNameText.setText("");
	}
}

④ BookTypeAddInterFrame（图书类别添加界面）

package cn.ac.azure.view;

import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.sql.Connection;
import java.sql.SQLException;

import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JButton;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.border.LineBorder;

import cn.ac.azure.dao.BookTypeDao;
import cn.ac.azure.model.BookType;
import cn.ac.azure.util.DBTool;
/** * 图书类别内部添加窗体 * @author green * */
public class BookTypeAddInterFrame extends JInternalFrame { 
   
	//图书类别名称输入框
	private JTextField bookTypeNameText;
	//图书类别描述输入框
	private JTextArea bookTypeDescText;
	//重置按钮
	private JButton resetBtn;
	//添加按钮
	private JButton addBtn;
	//图书类别数据库访问对象
	private BookTypeDao bookTypeDao;
	/** * Launch the application. */
	public static void main(String[] args) { 
   
		EventQueue.invokeLater(new Runnable() { 
   
			public void run() { 
   
				try { 
   
					BookTypeAddInterFrame frame = new BookTypeAddInterFrame();
					frame.setVisible(true);
				} catch (Exception e) { 
   
					e.printStackTrace();
				}
			}
		});
	}

	/** * Create the frame. */
	public BookTypeAddInterFrame() { 
   
		//改变系统默认字体
		Font font = new Font("Dialog", Font.PLAIN, 12);
		java.util.Enumeration keys = UIManager.getDefaults().keys();
		while (keys.hasMoreElements()) { 
   
			Object key = keys.nextElement();
			Object value = UIManager.get(key);
			if (value instanceof javax.swing.plaf.FontUIResource) { 
   
				UIManager.put(key, font);
			}
		}
		setClosable(true);
		setIconifiable(true);
		setTitle("图书类别添加");
		setBounds(100, 100, 487, 342);
		
		JLabel label = new JLabel("图书类别名称：");
		
		bookTypeNameText = new JTextField();
		bookTypeNameText.setColumns(10);
		
		JLabel label_1 = new JLabel("图书类别描述：");
		
		bookTypeDescText = new JTextArea();
		
		//添加按钮
		addBtn = new JButton("添加");
		addBtn.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				addActionPerformed(e);
			}
		});
		//重置按钮
		resetBtn = new JButton("重置");
		resetBtn.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				resetActionPerformed(e);
			}
		});
		GroupLayout groupLayout = new GroupLayout(getContentPane());
		groupLayout.setHorizontalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGroup(groupLayout.createParallelGroup(Alignment.LEADING)
						.addGroup(groupLayout.createSequentialGroup()
							.addGap(128)
							.addComponent(addBtn)
							.addGap(91)
							.addComponent(resetBtn))
						.addGroup(groupLayout.createSequentialGroup()
							.addGap(89)
							.addGroup(groupLayout.createParallelGroup(Alignment.LEADING)
								.addComponent(bookTypeDescText)
								.addGroup(groupLayout.createSequentialGroup()
									.addComponent(label)
									.addPreferredGap(ComponentPlacement.RELATED)
									.addComponent(bookTypeNameText, GroupLayout.PREFERRED_SIZE, 189, GroupLayout.PREFERRED_SIZE))
								.addComponent(label_1))))
					.addContainerGap(105, Short.MAX_VALUE))
		);
		groupLayout.setVerticalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(49)
					.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)
						.addComponent(label)
						.addComponent(bookTypeNameText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addGap(18)
					.addComponent(label_1)
					.addGap(10)
					.addComponent(bookTypeDescText, GroupLayout.PREFERRED_SIZE, 87, GroupLayout.PREFERRED_SIZE)
					.addGap(41)
					.addGroup(groupLayout.createParallelGroup(Alignment.BASELINE)
						.addComponent(resetBtn)
						.addComponent(addBtn))
					.addContainerGap())
		);
		getContentPane().setLayout(groupLayout);
		
		//设置文本域边框
		bookTypeDescText.setBorder(new LineBorder(new java.awt.Color(127,157,185), 1, false));
	}
	/** * 添加事件处理 * @param evt */
	private void addActionPerformed(ActionEvent evt) { 
   
		//获取输入框的值
		String bookTypeName=bookTypeNameText.getText();
		String bookTypeDesc=bookTypeDescText.getText();
		if(bookTypeName==null || "".equals(bookTypeName.trim())){ 
   
			JOptionPane.showMessageDialog(null,"图书类别不能为空！");
			return;
		}
		//新建图书类别实体对象
		BookType bookType=new BookType(bookTypeName, bookTypeDesc);
		//定义数据库连接
		Connection con=null;
		try { 
   
			//获取数据库连接
			con=DBTool.getConnetion();
			//初始化图书类别对象BookTypeDao
			bookTypeDao=new BookTypeDao();
			//调用图书类别dao对象的添加方法
			int res=bookTypeDao.add(con, bookType);
			if(res!=0){ 
   
				//提示添加成功
				JOptionPane.showMessageDialog(null, "图书添加成功(n_n)");
				//清空输入框
				bookTypeNameText.setText("");
				bookTypeDescText.setText("");
			}else{ 
   
				//提示添加失败
				JOptionPane.showMessageDialog(null,"图书添加失败(u_u)");
			}
		} catch (SQLException e) { 
   
			//记录日志
			e.printStackTrace();
			throw new RuntimeException("添加图书失败",e);
		}finally{ 
   
			//关闭数据库
			DBTool.close(con);
		}
	}

	/** * 重置事件处理 * @param evt */
	private void resetActionPerformed(ActionEvent evt) { 
   
		//置空图书类别名称输入框
		bookTypeNameText.setText("");
		//置空图书类别描述输入框
		bookTypeDescText.setText("");
	}
}

⑤ BookManageInterFrame（图书管理界面）

package cn.ac.azure.view;

import java.awt.EventQueue;
import java.awt.Font;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Vector;

import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JInternalFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.UIManager;
import javax.swing.border.TitledBorder;
import javax.swing.table.DefaultTableModel;

import cn.ac.azure.dao.BookDao;
import cn.ac.azure.dao.BookTypeDao;
import cn.ac.azure.model.Book;
import cn.ac.azure.model.BookType;
import cn.ac.azure.util.DBTool;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

public class BookManageInterFrame extends JInternalFrame { 
   
	private JTextField s_bookNameText;
	private JTextField s_authorText;
	private JTable bookTable;
	private JComboBox s_bookTypecomboBox;
	private BookTypeDao bookTypeDao;
	private BookDao bookDao;
	private JTextField idText;
	private JTextField bookNameText;
	private JTextField priceText;
	private JTextField authorText;
	private JTextField bookDescText;
	private final ButtonGroup buttonGroup = new ButtonGroup();
	private JComboBox bookTypeComboBox;
	private JRadioButton maleBtn;
	private JRadioButton femaleBtn;
	/** * Launch the application. */
	public static void main(String[] args) { 
   
		EventQueue.invokeLater(new Runnable() { 
   
			public void run() { 
   
				try { 
   
					BookManageInterFrame frame = new BookManageInterFrame();
					frame.setVisible(true);
				} catch (Exception e) { 
   
					e.printStackTrace();
				}
			}
		});
	}

	/** * Create the frame. */
	public BookManageInterFrame() { 
   
		
		//改变系统默认字体
		Font font = new Font("Dialog", Font.PLAIN, 12);
		java.util.Enumeration keys = UIManager.getDefaults().keys();
		while (keys.hasMoreElements()) { 
   
			Object key = keys.nextElement();
			Object value = UIManager.get(key);
			if (value instanceof javax.swing.plaf.FontUIResource) { 
   
				UIManager.put(key, font);
			}
		}
		
		setIconifiable(true);
		setClosable(true);
		setTitle("图书管理 ");
		setBounds(100, 100, 767, 528);
		
		JPanel panel = new JPanel();
		panel.setBorder(new TitledBorder(null, "搜索条件", TitledBorder.LEADING, TitledBorder.TOP, null, null));
		
		JScrollPane scrollPane = new JScrollPane();
		
		JPanel panel_1 = new JPanel();
		panel_1.setBorder(new TitledBorder(null, "表单操作", TitledBorder.LEADING, TitledBorder.TOP, null, null));
		GroupLayout groupLayout = new GroupLayout(getContentPane());
		groupLayout.setHorizontalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(Alignment.TRAILING, groupLayout.createSequentialGroup()
					.addGap(29)
					.addGroup(groupLayout.createParallelGroup(Alignment.TRAILING)
						.addComponent(panel_1, Alignment.LEADING, GroupLayout.DEFAULT_SIZE, GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
						.addComponent(scrollPane, GroupLayout.DEFAULT_SIZE, 661, Short.MAX_VALUE)
						.addComponent(panel, GroupLayout.DEFAULT_SIZE, 661, Short.MAX_VALUE))
					.addGap(38))
		);
		groupLayout.setVerticalGroup(
			groupLayout.createParallelGroup(Alignment.LEADING)
				.addGroup(groupLayout.createSequentialGroup()
					.addGap(29)
					.addComponent(panel, GroupLayout.PREFERRED_SIZE, 75, GroupLayout.PREFERRED_SIZE)
					.addPreferredGap(ComponentPlacement.UNRELATED)
					.addComponent(scrollPane, GroupLayout.PREFERRED_SIZE, 137, GroupLayout.PREFERRED_SIZE)
					.addPreferredGap(ComponentPlacement.UNRELATED)
					.addComponent(panel_1, GroupLayout.PREFERRED_SIZE, 217, GroupLayout.PREFERRED_SIZE)
					.addContainerGap(20, Short.MAX_VALUE))
		);
		
		JLabel label_2 = new JLabel("编号：");
		
		idText = new JTextField();
		idText.setColumns(10);
		
		JLabel label_3 = new JLabel("图书名称：");
		
		bookNameText = new JTextField();
		bookNameText.setColumns(10);
		
		JLabel label_4 = new JLabel("作者性别：");
		
		maleBtn = new JRadioButton("男");
		buttonGroup.add(maleBtn);
		
		femaleBtn = new JRadioButton("女");
		buttonGroup.add(femaleBtn);
		
		JLabel label_5 = new JLabel("价格：");
		
		priceText = new JTextField();
		priceText.setColumns(10);
		
		JLabel label_6 = new JLabel("图书作者：");
		
		authorText = new JTextField();
		authorText.setColumns(10);
		
		JLabel label_7 = new JLabel("图书类别：");
		
		bookTypeComboBox = new JComboBox();
		
		JLabel label_8 = new JLabel("图书描述：");
		
		bookDescText = new JTextField();
		bookDescText.setColumns(10);
		
		//修改按钮
		JButton modifyBtn = new JButton("修改");
		modifyBtn.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				modifyBookActionPerformed(e);
			}
		});
		modifyBtn.setIcon(new ImageIcon(BookManageInterFrame.class.getResource("/images/modify.png")));
		
		//删除按钮
		JButton deleteBtn = new JButton("删除");
		deleteBtn.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				deleteBookActionPerformed(e);
			}
		});
		deleteBtn.setIcon(new ImageIcon(BookManageInterFrame.class.getResource("/images/delete.png")));
		GroupLayout gl_panel_1 = new GroupLayout(panel_1);
		gl_panel_1.setHorizontalGroup(
			gl_panel_1.createParallelGroup(Alignment.TRAILING)
				.addGroup(gl_panel_1.createSequentialGroup()
					.addGap(44)
					.addGroup(gl_panel_1.createParallelGroup(Alignment.LEADING, false)
						.addGroup(gl_panel_1.createSequentialGroup()
							.addComponent(label_8)
							.addPreferredGap(ComponentPlacement.RELATED)
							.addComponent(bookDescText))
						.addGroup(gl_panel_1.createSequentialGroup()
							.addGroup(gl_panel_1.createParallelGroup(Alignment.TRAILING)
								.addComponent(label_2)
								.addComponent(label_5))
							.addPreferredGap(ComponentPlacement.UNRELATED)
							.addGroup(gl_panel_1.createParallelGroup(Alignment.LEADING, false)
								.addComponent(priceText)
								.addComponent(idText, GroupLayout.DEFAULT_SIZE, 86, Short.MAX_VALUE))
							.addGap(37)
							.addGroup(gl_panel_1.createParallelGroup(Alignment.LEADING, false)
								.addGroup(gl_panel_1.createSequentialGroup()
									.addComponent(label_3)
									.addPreferredGap(ComponentPlacement.RELATED)
									.addComponent(bookNameText, GroupLayout.PREFERRED_SIZE, 136, GroupLayout.PREFERRED_SIZE))
								.addGroup(gl_panel_1.createSequentialGroup()
									.addComponent(label_6)
									.addPreferredGap(ComponentPlacement.RELATED)
									.addComponent(authorText)))
							.addGap(35)
							.addGroup(gl_panel_1.createParallelGroup(Alignment.LEADING)
								.addGroup(gl_panel_1.createSequentialGroup()
									.addComponent(label_4)
									.addPreferredGap(ComponentPlacement.UNRELATED)
									.addComponent(maleBtn)
									.addGap(18)
									.addComponent(femaleBtn))
								.addGroup(gl_panel_1.createSequentialGroup()
									.addComponent(label_7)
									.addPreferredGap(ComponentPlacement.UNRELATED)
									.addComponent(bookTypeComboBox, GroupLayout.PREFERRED_SIZE, 97, GroupLayout.PREFERRED_SIZE)))))
					.addContainerGap(34, Short.MAX_VALUE))
				.addGroup(gl_panel_1.createSequentialGroup()
					.addContainerGap(201, Short.MAX_VALUE)
					.addComponent(modifyBtn)
					.addGap(104)
					.addComponent(deleteBtn)
					.addGap(190))
		);
		gl_panel_1.setVerticalGroup(
			gl_panel_1.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel_1.createSequentialGroup()
					.addContainerGap()
					.addGroup(gl_panel_1.createParallelGroup(Alignment.BASELINE)
						.addComponent(maleBtn)
						.addComponent(bookNameText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_3)
						.addComponent(label_2)
						.addComponent(idText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(femaleBtn)
						.addComponent(label_4))
					.addGap(18)
					.addGroup(gl_panel_1.createParallelGroup(Alignment.BASELINE)
						.addComponent(priceText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_5)
						.addComponent(label_6)
						.addComponent(authorText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(bookTypeComboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_7))
					.addGap(18)
					.addGroup(gl_panel_1.createParallelGroup(Alignment.BASELINE)
						.addComponent(label_8)
						.addComponent(bookDescText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
					.addGap(27)
					.addGroup(gl_panel_1.createParallelGroup(Alignment.BASELINE)
						.addComponent(modifyBtn)
						.addComponent(deleteBtn))
					.addContainerGap())
		);
		panel_1.setLayout(gl_panel_1);
		
		//表格
		bookTable = new JTable();
		//表格鼠标按下事件
		bookTable.addMouseListener(new MouseAdapter() { 
   
			@Override
			public void mousePressed(MouseEvent e) { 
   
				tableMousePressed(e);
			}
		});
		bookTable.setModel(new DefaultTableModel(
			new Object[][] { 
   
			},
			new String[] { 
   
				"编号", "图书名称", "图书作者", "图书性别", "图书价格", "图书类别", "图书描述"
			}
		) { 
   
			boolean[] columnEditables = new boolean[] { 
   
				false, false, false, false, false, false, false
			};
			public boolean isCellEditable(int row, int column) { 
   
				return columnEditables[column];
			}
		});
		bookTable.getColumnModel().getColumn(0).setPreferredWidth(56);
		bookTable.getColumnModel().getColumn(1).setPreferredWidth(100);
		bookTable.getColumnModel().getColumn(2).setPreferredWidth(63);
		bookTable.getColumnModel().getColumn(3).setPreferredWidth(63);
		bookTable.getColumnModel().getColumn(4).setPreferredWidth(61);
		bookTable.getColumnModel().getColumn(5).setPreferredWidth(94);
		bookTable.getColumnModel().getColumn(6).setPreferredWidth(163);
		scrollPane.setViewportView(bookTable);
		
		JLabel lblL = new JLabel("图书名称：");
		
		s_bookNameText = new JTextField();
		s_bookNameText.setColumns(10);
		
		JLabel label = new JLabel("图书作者：");
		
		s_authorText = new JTextField();
		s_authorText.setColumns(10);
		
		JLabel label_1 = new JLabel("图书类别：");
		
		s_bookTypecomboBox = new JComboBox();
		
		//图书查询按钮
		JButton s_searchBtn = new JButton("查询");
		s_searchBtn.addActionListener(new ActionListener() { 
   
			public void actionPerformed(ActionEvent e) { 
   
				searchActionPerformed(e);
			}
		});
		s_searchBtn.setIcon(new ImageIcon(BookManageInterFrame.class.getResource("/images/search.png")));
		GroupLayout gl_panel = new GroupLayout(panel);
		gl_panel.setHorizontalGroup(
			gl_panel.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel.createSequentialGroup()
					.addGap(20)
					.addComponent(lblL)
					.addPreferredGap(ComponentPlacement.RELATED)
					.addComponent(s_bookNameText, GroupLayout.PREFERRED_SIZE, 88, GroupLayout.PREFERRED_SIZE)
					.addGap(18)
					.addComponent(label)
					.addPreferredGap(ComponentPlacement.RELATED)
					.addComponent(s_authorText, GroupLayout.DEFAULT_SIZE, 89, Short.MAX_VALUE)
					.addGap(18)
					.addComponent(label_1)
					.addPreferredGap(ComponentPlacement.UNRELATED)
					.addComponent(s_bookTypecomboBox, GroupLayout.PREFERRED_SIZE, 94, GroupLayout.PREFERRED_SIZE)
					.addGap(18)
					.addComponent(s_searchBtn)
					.addGap(29))
		);
		gl_panel.setVerticalGroup(
			gl_panel.createParallelGroup(Alignment.LEADING)
				.addGroup(gl_panel.createSequentialGroup()
					.addContainerGap()
					.addGroup(gl_panel.createParallelGroup(Alignment.BASELINE)
						.addComponent(lblL)
						.addComponent(s_bookNameText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label)
						.addComponent(s_authorText, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(label_1)
						.addComponent(s_bookTypecomboBox, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
						.addComponent(s_searchBtn))
					.addContainerGap(19, Short.MAX_VALUE))
		);
		panel.setLayout(gl_panel);
		getContentPane().setLayout(groupLayout);
		//初始化搜索栏图书类别下拉框
		fillBookTypeComboBox("search");
		//初始化操作栏图书类别下拉框
		fillBookTypeComboBox("modify");
		//初始化表格显示，显示所有的书籍
		fillBookTable(new Book());
	}
	
	/** * 图书修改事件 * @param evt */
	private void modifyBookActionPerformed(ActionEvent evt) { 
   
		//获取图书id
		String id=idText.getText();
		//获取图书名称
		String bookName=bookNameText.getText();
		//获取图书作者
		String author=authorText.getText();
		//或者作者性别
		String sex="男";
		if(femaleBtn.isSelected()){ 
   
			sex="女";
		}
		//获取图书价格
		String price=priceText.getText();
		//获取图书id
		BookType bookType=(BookType)bookTypeComboBox.getSelectedItem();
		Integer bookTypeId=bookType.getId();
		//获取图书描述
		String bookDesc=bookDescText.getText();
		
		//判断是否id是否为空
		if(id==null || "".equals(id)){ 
    //为空
			JOptionPane.showMessageDialog(null, "请选中要删除的行！");  //给用户提示
			return;
		}
		//判断图书名称是否为空
		if(bookName==null || "".equals(bookName)){ 
    //为空
			JOptionPane.showMessageDialog(null, "图书名称不能为空！");  //给用户提示
			return;
		}
		//判断图书作者是否为空
		if(author==null || "".equals(author)){ 
    //为空
			JOptionPane.showMessageDialog(null, "图书作者不能为空！");  //给用户提示
			return;
		}
		//判断图书价格是否为空
		if(price==null || "".equals(price)){ 
    //为空
			JOptionPane.showMessageDialog(null, "图书价格不能为空！");  //给用户提示
			return;
		}
		//从获取的图书信息创建图书对象
		Book book=new Book(Integer.parseInt(id),bookName, author, sex, Float.parseFloat(price), bookTypeId, bookDesc, null);
		System.out.println("从获取的图书信息创建图书对象:"+book);
		//定义数据库连接
		Connection con=null;
		try { 
   
			//获取数据库连接
			con=DBTool.getConnetion();
			//初始化图书数据访问对象
			bookDao=new BookDao();
			//执行图书访问对象的修改方法，并获得修改的记录数
			int res=bookDao.update(con, book);
			if(res==1){ 
    //为1
				JOptionPane.showMessageDialog(null,"图书修改成功n_n");
				//刷新图书表格显示
				fillBookTable(new Book());
				//重置操作栏
				resetValue();
			}else{ 
    //为0
				JOptionPane.showMessageDialog(null,"图书修改失败u_u");
			}
		} catch (SQLException e) { 
   
			//记录日志
			e.printStackTrace();
			throw new RuntimeException("修改图书失败",e);
		}finally{ 
   
			//关闭数据库连接
			DBTool.close(con);
		}
	}
	/** * 图书删除事件 * @param evt */
	private void deleteBookActionPerformed(ActionEvent evt) { 
   
		//获取图书id
		String id=idText.getText();
		//判断是否id是否为空
		if(id==null || "".equals(id)){ 
    //为空
			JOptionPane.showMessageDialog(null, "请选中要删除的行！");  //给用户提示
			return;
		}
		//定义数据库连接对象
		Connection con=null;
		try { 
   
			//初始化数据库连接对象
			con=DBTool.getConnetion(); 
			//初始化图书数据访问对象
			bookDao=new BookDao();
			//执行图书访问对象的删除方法并返回删除的记录数
			int res=bookDao.delete(con, Integer.parseInt(id));
			if(res==1){ 
    //为1
				JOptionPane.showMessageDialog(null, "图书删除成功n_n");
				//刷新图书表格显示
				fillBookTable(new Book());
				//重置操作栏
				resetValue();
			}else{ 
    //为其他
				JOptionPane.showMessageDialog(null, "图书删除失败u_u");
			}
		} catch (SQLException e) { 
   
			//记录日志
			e.printStackTrace();
			throw new RuntimeException("删除图书失败",e);
		}finally{ 
   
			//记得关闭数据库（******）
			DBTool.close(con);
		}
	}
	/** * 重置操作栏的所有值 */
	private void resetValue(){ 
   
		idText.setText("");
		bookNameText.setText("");
		authorText.setText("");
		maleBtn.setSelected(true);
		priceText.setText("");
		fillBookTypeComboBox("modify");
		bookDescText.setText("");
	}
	/** * 表格鼠标按下事件处理 * @param evt */
	private void tableMousePressed(MouseEvent evt) { 
   
		//获取图书表格选中的行的行号
		int row=bookTable.getSelectedRow();
		//获取选中行第一个数据并设置显示在操作栏的id框
		idText.setText((Integer)bookTable.getValueAt(row,0)+"");
		//获取选中行第二个数据并设置显示在操作栏的图书名称框
		bookNameText.setText((String)bookTable.getValueAt(row, 1));
		//获取选中行第三个数据并设置显示在操作栏的图书作者框
		authorText.setText((String)bookTable.getValueAt(row, 2));
		//获取选中行第四个数据并设置显示在操作栏的作者性别单选框
		String sex=(String)bookTable.getValueAt(row, 3);
		if("男".equals(sex)){ 
   
			maleBtn.setSelected(true);
		}else{ 
   
			femaleBtn.setSelected(true);
		}
		//获取选中行第五个数据并设置显示在操作栏的图书价格框
		priceText.setText((Float)bookTable.getValueAt(row, 4)+"");
		//获取选中行第六个数据并设置显示在操作栏的图书类别下拉框中
		String bookTypeName=(String)bookTable.getValueAt(row, 5);
		int rows=bookTypeComboBox.getItemCount();  //获取下拉框总共的选项
		for(int i=0;i<rows;i++){ 
    //遍历下拉框
			BookType item=(BookType) bookTypeComboBox.getItemAt(i); //获取每一个选项并强转图书类别对象
			if(item.getBookTypeName().equals(bookTypeName)){ 
     //将获取的图书类别和下拉框中的图书类别比较，若相同
				bookTypeComboBox.setSelectedIndex(i); //则该下拉框选项被选中
			}
		}
		//获取选中行第七个数据并设置显示在操作栏的图书描述框
		bookDescText.setText((String)bookTable.getValueAt(row, 6));
	}

	/** * 图书查询事件处理 * @param evt 事件对象 */
	private void searchActionPerformed(ActionEvent evt) { 
   
		//获取查询的条件
		String bookName=s_bookNameText.getText();  //图书名称
		String author=s_authorText.getText();  //图书作者
		String bookTypeName=s_bookTypecomboBox.getSelectedItem().toString(); //图书类别
		//对图书类别"请选择..."换成""
		if("请选择...".equals(bookTypeName)){ 
   
			bookTypeName="";
		}
		//生成带有条件的图书对象
		Book book=new Book();
		book.setBookName(bookName);  //设置图书名称条件
		book.setAuthor(author);   //设置图书作者条件
		book.setBookTypeName(bookTypeName);  //设置图书类别条件
		//调用table填充函数，根据查询结果重新填充表格
		fillBookTable(book);  
	}

	/** * 初始化图书类别下拉框 * @param type 根据不同的参数填充不同的下拉框 */
	
	private void fillBookTypeComboBox(String type){ 
   
		
		//定义一个图书类别，用于存储查询的图书类别
		BookType s_bookType=null;
		//定义一个数据库连接
		Connection con=null;
		try { 
   
			//获取数据库连接
			con=DBTool.getConnetion();
			//初始化图书类别访问数据对象
			bookTypeDao=new BookTypeDao();
			//查询图书类别，得到结果集
			ResultSet rs=bookTypeDao.search(con, new BookType());
			if("search".equals(type)){ 
   
				BookType bookType=new BookType();
				bookType.setBookTypeName("请选择...");
				bookType.setId(-1);
				s_bookTypecomboBox.addItem(bookType);
			}
			//遍历结果集
			while(rs.next()){ 
    //如果有数据的话
				//初始化接受查询的图书类别
				s_bookType=new BookType();
				//根据查询结果设置id
				s_bookType.setId(rs.getInt("id"));
				//根据查询结果设置图书类别名称
				s_bookType.setBookTypeName(rs.getString("bookTypeName"));
				if("search".equals(type)){ 
   
					//将查询的图书类别添加到下拉框中
					s_bookTypecomboBox.addItem(s_bookType);
				}
				if("modify".equals(type)){ 
   
					//将查询的图书类别添加到表单操作下拉框中
					bookTypeComboBox.addItem(s_bookType);
				}
			}
		} catch (SQLException e) { 
   
			//记录日志
			e.printStackTrace();
			throw new RuntimeException("初始化下拉框失败",e);
		}finally{ 
   
			//关闭数据库连接
			DBTool.close(con);
		}
	}
	/** * 初始化表格，列出所有的书籍 * @param book */
	private void fillBookTable(Book book){ 
   
		//获取表格的模型
		DefaultTableModel dtm=(DefaultTableModel) bookTable.getModel();
		//填充表格时设置成0行（相当于归零处理）
		dtm.setRowCount(0);
		//定义数据库连接
		Connection con=null;
		try { 
   
			//获取数据库连接
			con=DBTool.getConnetion();
			//初始化图书数据访问对象
			bookDao=new BookDao();
			//按条件查询图书（这里没有条件，查出所有书籍）
			ResultSet rs=bookDao.search(con, book);
			//遍历查询结果
			while(rs.next()){ 
   
				//定义一个集合，由于存储图书信息
				Vector v=new Vector();
				v.add(rs.getInt("id"));  //添加编号
				v.add(rs.getString("bookName"));  //添加图书名称
				v.add(rs.getString("author"));  //添加图书作者
				v.add(rs.getString("sex"));     //添加作者性别
				v.add(rs.getFloat("price"));    //添加图书价格
				v.add(rs.getString("bookTypeName"));  //添加图书类别
				v.add(rs.getString("bookDesc"));
				//添加表格新行
				dtm.addRow(v);
			}
		} catch (SQLException e) { 
   
			//记录日志
			e.printStackTrace();
			throw new RuntimeException("初始化表格失败",e);
		}finally{ 
   
			//关闭数据库连接
			DBTool.close(con);
		}
	}
}