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SSM整合实现增删改查操作【保姆式教学】

准备工作
- 环境准备
- 数据库准备
开始干活
前端vue项目

准备工作

环境准备

IDEA
MySQL 5.7.31
Tomcat 8.5.64
Maven 3.6.3

这是我的环境，版本别差太大就没问题。

数据库准备


CREATE DATABASE `ssmtest`;

USE `ssmtest`;

DROP TABLE IF EXISTS `user`;

CREATE TABLE `user`(
	`userid` INT(10) NOT NULL AUTO_INCREMENT COMMENT '用户ID',
	`username` VARCHAR(100) NOT NULL COMMENT '用户名',
	`password` VARCHAR(100) NOT NULL COMMENT '用户密码',
	`value` INT(10) NOT NULL DEFAULT 1 COMMENT '状态，1正常',
	 KEY `userid`(`userid`)
	
) ENGINE=INNODB DEFAULT CHARSET=utf8;



INSERT INTO `user`(`userid`,`username`,`password`,`value`)VALUES
(1,'keafmd','666',1),
(2,'keafod','888',1);

开始干活

新建个Maven项目ssmtest，加上Web支持

创建完成的效果：

添加依赖

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<!--统一的版本管理-->
<spring.version>5.2.7.RELEASE</spring.version>
<slf4j.version>1.7.6</slf4j.version>
<log4j.version>1.2.12</log4j.version>
<mysql.version>5.1.49</mysql.version>
<mybatis.version>3.4.5</mybatis.version>
</properties>
<dependencies>
<!-- spring -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.5</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<!--Junit-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>compile</scope>
</dependency>
<!--数据库驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- 数据库连接池 -->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.1</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<!--Servlet - JSP -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--Mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<!-- log -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
</dependencies>

完整的pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.keafmd</groupId>
<artifactId>ssmtest</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>ssmtest Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<!--统一的版本管理-->
<spring.version>5.2.7.RELEASE</spring.version>
<slf4j.version>1.7.6</slf4j.version>
<log4j.version>1.2.12</log4j.version>
<mysql.version>5.1.49</mysql.version>
<mybatis.version>3.4.5</mybatis.version>
</properties>
<dependencies>
<!-- spring -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.5</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<!--Junit-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>compile</scope>
</dependency>
<!--数据库驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- 数据库连接池 -->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.1</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
<!--Servlet - JSP -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--Mybatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.2</version>
</dependency>
<!-- log -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
</dependencies>
<build>
<finalName>ssmtest</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>

创建entity、dao、service、controller包

实体类编写

添加lombook

User：

package com.keafmd.entity;
import lombok.Data;
import java.io.Serializable;
/** * Keafmd * * @ClassName: User * @Description: 用户实体类 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:11 * @Blog: https://keafmd.blog.csdn.net/ */
@Data
public class User implements Serializable { 

private Integer userId;
private String userName;
private String password;
}

持久层接口编写

IUserDao ：

package com.keafmd.dao;
import com.keafmd.entity.User;
import java.util.List;
/** * Keafmd * * @ClassName: IUserDao * @Description: 用户dao接口 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:20 * @Blog: https://keafmd.blog.csdn.net/ */
public interface IUserDao { 

//查询所有
public List<User> findAll();
//保存用户
public void saveUser(User user);
}

业务层接口编写

IUserService：

package com.keafmd.service;
import com.keafmd.entity.User;
import java.util.List;
/** * Keafmd * * @ClassName: IUserService * @Description: user业务层接口 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:23 * @Blog: https://keafmd.blog.csdn.net/ */
public interface IUserService { 

//查询所有
public List<User> findAll();
//保存用户
public void saveUser(User user);
}

业务层实现类编写

UserServiceImpl ：

package com.keafmd.service.impl;
import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import java.util.List;
/** * Keafmd * * @ClassName: UserService * @Description: user业务层实现类 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:25 * @Blog: https://keafmd.blog.csdn.net/ */
public class UserServiceImpl implements IUserService { 

@Override
public List<User> findAll() { 

System.out.println("user业务层实现类--findAll");
return null;
}
@Override
public void saveUser(User user) { 

System.out.println("user业务层实现类--saveUser");
}
}

表现层编写

UserController ：

package com.keafmd.controller;
/** * Keafmd * * @ClassName: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
public class UserController { 

}

整合步骤

保证 Spring 框架在 web 工程中独立运行

第一步：编写 spring 配置文件并导入约束

applicationContext.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 开启注解扫描，要扫描的是service和dao层的注解，要忽略web层注解，因为web层让SpringMVC框架去管理 -->
<context:component-scan base-package="com.keafmd">
<!-- 配置要忽略的注解 -->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans>

第二步：使用注解配置业务层

在 UserServiceImpl 方法上加上 @Service("userService").

package com.keafmd.service.impl;
import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import org.springframework.stereotype.Service;
import java.util.List;
/** * Keafmd * * @ClassName: UserService * @Description: user业务层实现类 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:25 * @Blog: https://keafmd.blog.csdn.net/ */
@Service("userService")
public class UserServiceImpl implements IUserService { 

@Override
public List<User> findAll() { 

System.out.println("user业务层实现类--findAll");
return null;
}
@Override
public void saveUser(User user) { 

System.out.println("user业务层实现类--saveUser");
}
}

第三步：导入log4j.properties配置文件

# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
log4j.rootCategory=info, CONSOLE, LOGFILE
# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE
# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:\axis.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

第四步：测试 spring 能否独立运行

测试代码：

package com.keafmd;
import com.keafmd.service.IUserService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/** * Keafmd * * @ClassName: TestSpring * @Description: 测试 spring 能否独立运行 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:38 * @Blog: https://keafmd.blog.csdn.net/ */
public class TestSpring { 

@Test
public void test1(){ 

//加载配置文件
ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
//获取对象
IUserService userService = (IUserService)ac.getBean("userService");
//调用方法
userService.findAll();
}
}

测试效果：

保证 SpringMVC 在 web 工程中独立运行

第一步：编写 SpringMVC 的配置文件

springmvc.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 开启注解扫描，扫描controller的注解，别的不扫描 -->
<context:component-scan base-package="com.keafmd">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 配置视图解析器 -->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- JSP文件所在的目录 -->
<property name="prefix" value="/WEB-INF/pages/"/>
<!-- 文件的后缀名 -->
<property name="suffix" value=".jsp"/>
</bean>
<!-- 过滤静态资源，设置静态资源不过滤 -->
<mvc:resources location="/css/" mapping="/css/**"/>
<mvc:resources location="/images/" mapping="/images/**"/>
<mvc:resources location="/js/" mapping="/js/**"/>
<!-- 开启对SpringMVC注解的支持 -->
<mvc:annotation-driven/>
</beans>

第二步：在 web.xml 中配置核心控制器（DispatcherServlet）

web.xml：

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<!-- 配置前端控制器：服务器启动必须加载，需要加载springmvc.xml配置文件 -->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 配置初始化参数，加载springmvc.xml配置文件 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<!-- 启动服务器，创建该servlet -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!--解决中文乱码的过滤器-->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

第三步：编写 Controller 和 jsp 页面

UserController ：

package com.keafmd.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/** * Keafmd * * @ClassName: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
@Controller
@RequestMapping("/user")
public class UserController { 

@RequestMapping("/findAll")
public String findAll(){ 

System.out.println("表现层--查询所有用户");
return "user_list";
}
}

index.jsp：

<%--
Created by IntelliJ IDEA.
User: lenovo
Date: 2021/4/19
Time: 9:52
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<a href="user/findAll">查询所有用户</a>
</body>
</html>

user_list.jsp：

<%--
Created by IntelliJ IDEA.
User: lenovo
Date: 2021/4/19
Time: 9:55
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>查询所有用户</h1>
</body>
</html>

第四步：部署tomcat服务器

-Dfile.encoding=utf-8

第五步：启动服务器，进行测试

点击后的效果：

Spring 整合 SpringMVC 的框架

第一步：配置监听器实现启动服务创建容器

<!-- 配置 spring 提供的监听器，用于启动服务时加载容器 。 该监听器只能加载 WEB-INF 目录中名称为 applicationContext.xml 的配置文件 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 手动指定 spring 配置文件位置 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

完整的web.xml：

<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<!-- 配置前端控制器：服务器启动必须加载，需要加载springmvc.xml配置文件 -->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 配置初始化参数，加载springmvc.xml配置文件 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<!-- 启动服务器，创建该servlet -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 配置 spring 提供的监听器，用于启动服务时加载容器 。 该监听器只能加载 WEB-INF 目录中名称为 applicationContext.xml 的配置文件 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 手动指定 spring 配置文件位置 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!--解决中文乱码的过滤器-->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

第二步：在controller中注入service对象，调用service对象的方法进行测试

UserController ：

package com.keafmd.controller;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/** * Keafmd * * @ClassName: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
@Controller
@RequestMapping("/user")
public class UserController { 

@Autowired
private IUserService userService;
@RequestMapping("/findAll")
public String findAll(){ 

System.out.println("表现层--查询所有用户");
//调用service的方法
userService.findAll();
return "user_list";
}
}

重启Tomcat点击查询所有用户，控制台输出效果如下：

保证 MyBatis 框架在 web 工程中独立运行

第一步：在web项目中编写SqlMapConfig.xml的配置文件，编写核心配置文件

SqlMapConfig.xml：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 配置连接数据库的信息 -->
<properties resource="jdbcConfig.properties"></properties>
<!-- 配置mybatis的环境 -->
<environments default="mysql">
<environment id="mysql">
<!-- 配置事务管理 -->
<transactionManager type="JDBC"></transactionManager>
<dataSource type="pooled">
<property name="driver" value="${jdbc.driver}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</dataSource>
</environment>
</environments>
<!-- 指定映射文件位置 -->
<mappers>
<!--<mapper class="com.keafmd.dao.IAccountDao"/> <mapper class="com.keafmd.dao.IUserDao"/>-->
<package name="com.keafmd.dao"/>
</mappers>
</configuration>

jdbcConfig.properties：

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssmtest
jdbc.username=root
jdbc.password=18044229

第二步：在IUserDao接口的方法上添加注解，编写SQL语句

IUserDao ：

package com.keafmd.dao;
import com.keafmd.entity.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import java.util.List;
/** * Keafmd * * @ClassName: IUserDao * @Description: 用户dao接口 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:20 * @Blog: https://keafmd.blog.csdn.net/ */
public interface IUserDao { 

//查询所有
@Select("select * from user")
public List<User> findAll();
//保存用户
@Insert("insert into user(username,password) values(#{userName},#{password})")
public void saveUser(User user);
}

第三步：编写测试的方法

TestMybatis ：

package com.keafmd;
import com.keafmd.dao.IUserDao;
import com.keafmd.entity.User;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.io.InputStream;
import java.util.List;
/** * Keafmd * * @ClassName: TestMybatis * @Description: * @author: 牛哄哄的柯南 * @Date: 2021-04-19 10:20 * @Blog: https://keafmd.blog.csdn.net/ */
public class TestMybatis { 

private InputStream in;
private SqlSessionFactory factory;
private SqlSession session;
private IUserDao userDao;
@Before
public void init() throws Exception{ 

//加载配置文件
in = Resources.getResourceAsStream("SqlMapConfig.xml");
//创建SqlSessionFactory对象
factory = new SqlSessionFactoryBuilder().build(in);
//创建SqlSession对象
session = factory.openSession();
//获取到代理对象
userDao = session.getMapper(IUserDao.class);
}
@After
public void destory() throws Exception{ 

session.commit();
session.close();
in.close();
}
/** * 查询所有 */
@Test
public void run1(){ 

List<User> users = userDao.findAll();
for (User user : users) { 

System.out.println(user);
}
}
/** * 测试保存 */
@Test
public void saveUser(){ 

User user = new User();
user.setUserName("毛利小五郎");
user.setPassword("999");
userDao.saveUser(user);
}
}

测试效果：

Spring 整合 MyBatis 框架

把 mybatis 配置文件（SqlMapConfig.xml）中内容配置到 spring 配置文件中同时，把 mybatis 配置文件的内容清掉。

第一步：把SqlMapConfig.xml配置文件中的内容配置到applicationContext.xml配置文件中

把以下内容添加到applicationContext.xml配置文件中：

<!--Spring整合Mybatisl框架-->
<!-- 配置C3P0的连接池对象 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql:///ssmtest"/>
<property name="user" value="root"/>
<property name="password" value="18044229"/>
</bean>
<!-- 配置SqlSession的工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 配置扫描dao的包 -->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.keafmd.dao"/>
</bean>
<!--SqlMapConfig.xml和jdbcConfig.properties可以删除了-->

再添加上配置Spring框架声明式事务管理：

<!--配置Spring框架声明式事务管理-->
<!--配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置事务的通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
<tx:method name="*" isolation="DEFAULT"/>
</tx:attributes>
</tx:advice>
<!-- 配置AOP增强 -->
<aop:config>
<!--<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.keafmd.service.impl.*.*(..))"/>-->
<!-- 配置切入点表达式 -->
<aop:pointcut expression="execution(* com.keafmd.service.impl.*.*(..))" id="pt1"/>
<!-- 建立通知和切入点表达式的关系 -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"/>
</aop:config>

applicationContext.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 开启注解扫描，要扫描的是service和dao层的注解，要忽略web层注解，因为web层让SpringMVC框架去管理 -->
<context:component-scan base-package="com.keafmd">
<!-- 配置要忽略的注解 -->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--Spring整合Mybatisl框架-->
<!-- 配置C3P0的连接池对象 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql:///ssmtest?characterEncoding=utf8"/>
<property name="user" value="root"/>
<property name="password" value="root"/>
</bean>
<!-- 配置SqlSession的工厂 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 配置扫描dao的包 -->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.keafmd.dao"/>
</bean>
<!--SqlMapConfig.xml和jdbcConfig.properties可以删除了-->
<!--配置Spring框架声明式事务管理-->
<!--配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置事务的通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
<tx:method name="*" isolation="DEFAULT"/>
</tx:attributes>
</tx:advice>
<!-- 配置AOP增强 -->
<aop:config>
<!--<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.keafmd.service.impl.*.*(..))"/>-->
<!-- 配置切入点表达式 -->
<aop:pointcut expression="execution(* com.keafmd.service.impl.*.*(..))" id="pt1"/>
<!-- 建立通知和切入点表达式的关系 -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"/>
</aop:config>
</beans>

第三步：在IUserDao接口中添加@Repository注解

package com.keafmd.dao;
import com.keafmd.entity.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;
import java.util.List;
/** * Keafmd * * @ClassName: IUserDao * @Description: 用户dao接口 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:20 * @Blog: https://keafmd.blog.csdn.net/ */
@Repository
public interface IUserDao { 

//查询所有
@Select("select * from user")
public List<User> findAll();
//保存用户
@Insert("insert into user(username,password) values(#{userName},#{password})")
public void saveUser(User user);
}

第四步：在UserServiceImpl中注入dao对象

package com.keafmd.service.impl;
import com.keafmd.dao.IUserDao;
import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/** * Keafmd * * @ClassName: UserService * @Description: user业务层实现类 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:25 * @Blog: https://keafmd.blog.csdn.net/ */
@Service("userService")
public class UserServiceImpl implements IUserService { 

@Autowired
IUserDao userDao;
@Override
public List<User> findAll() { 

System.out.println("user业务层实现类--findAll");
return userDao.findAll();
}
@Override
public void saveUser(User user) { 

System.out.println("user业务层实现类--saveUser");
userDao.saveUser(user);
}
}

第五步：修改 UserController 代码

package com.keafmd.controller;
import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
/** * Keafmd * * @ClassName: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
@Controller
@RequestMapping("/user")
public class UserController { 

@Autowired
private IUserService userService;
@RequestMapping("/findAll")
public String findAll(Model model){ 

System.out.println("表现层--查询所有用户");
//调用service的方法
List<User> userList = userService.findAll();
model.addAttribute("userList",userList);
return "user_list";
}
@RequestMapping("/save")
public void save(User user , HttpServletRequest request, HttpServletResponse response) throws IOException { 

userService.saveUser(user);
response.sendRedirect(request.getContextPath()+"/user/findAll");
return;
}
}

第五步：修改 user_list.jsp 代码，实现显示账户信息

<%--
Created by IntelliJ IDEA.
User: lenovo
Date: 2021/4/19
Time: 9:55
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<h1>查询所有用户</h1>
<%--    ${ 
userList}--%>
<c:forEach items="${userList}" var="user">
${ 
user.userName}
${ 
user.password}
</c:forEach>
</body>
</html>

第六步：测试查询

效果：

第七步：测试保存

修改index.jsp代码，添加测试保存的代码：

<%--
Created by IntelliJ IDEA.
User: lenovo
Date: 2021/4/19
Time: 9:52
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<a href="user/findAll">查询所有用户</a>
<h1>测试保存</h1>
<form action="user/save" method="post">
账户名：<input type="text" name="userName" /><br/>
密码：<input type="text" name="password" /><br/>
<input type="submit" value="保存">
</form>
</body>
</html>

修改 UserController 代码，添加save方法：

package com.keafmd.controller;
import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
/** * Keafmd * * @ClassName: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
@Controller
@RequestMapping("/user")
public class UserController { 

@Autowired
private IUserService userService;
@RequestMapping("/findAll")
public String findAll(Model model){ 

System.out.println("表现层--查询所有用户");
//调用service的方法
List<User> userList = userService.findAll();
model.addAttribute("userList",userList);
return "user_list";
}
@RequestMapping("/save")
public void save(User user , HttpServletRequest request, HttpServletResponse response) throws IOException { 

userService.saveUser(user);
response.sendRedirect(request.getContextPath()+"/user/findAll");
return;
}
}

测试效果：

增删改查（前后端分离）

查找

实际开发中，多为前后端分离，所以我们需要修改我们的表现层代码，同时需要添加上jackson的依赖。

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.11.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.11.0</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.11.0</version>
</dependency>

UserController：

package com.keafmd.controller;
import com.keafmd.common.CommonResult;
import com.keafmd.entity.User;
import com.keafmd.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
/** * Keafmd * * @ClassName: UserController * @Description: user控制层 * @author: 牛哄哄的柯南 * @Date: 2021-04-19 9:28 * @Blog: https://keafmd.blog.csdn.net/ */
@Controller
@RequestMapping("/user")
public class UserController { 

@Autowired
private IUserService userService;
// http://127.0.0.1:8080/ssmtest/user/findAll
@RequestMapping("/findAll")
@ResponseBody
public List<User> findAll(){ 

System.out.println("表现层--查询所有用户");
//调用service的方法
List<User> userList = userService.findAll();
// model.addAttribute("userList",userList);
// return "user_list";
return userList;
}
@RequestMapping("/save")
public void save(User user , HttpServletRequest request, HttpServletResponse response) throws IOException { 

userService.saveUser(user);
response.sendRedirect(request.getContextPath()+"/user/findAll");
return;
}
}

访问： http://127.0.0.1:8080/ssmtest/user/findAll

前端vue项目

这里我们需要有相关的环境，这里不细说了。

创建个空的vue项目

找个文件夹进入命令行，输入：vue create ssmtest

关闭代码格式化校验工具

在项目的根目录（与package.json同级）中，添加名称为vue.config.js的文件，就能自动被vue-cli加载。

module.exports = { 

lintOnSave:false, //关闭代码格式化校验工具
devServer:{ 

port: 80 //修改启动端口
}
}

安装相关的工具

1、安装vue-router

npm install vue-router

2、安装 element-ui插件

npm i element-ui -S

3、安装axios

npm install axios

目录结构

编写main.js

在这里引入各种组件，写上router。

import Vue from 'vue'
import App from './App.vue'
import router from '@/router'
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
Vue.use(ElementUI);
Vue.config.productionTip = false
new Vue({ 

render: h => h(App),
router
}).$mount('#app')

编写App.vue

在div中写入<router-view></router-view>，用路由控制界面。

<template>
<div id="app">
<router-view></router-view>
</div>
</template>
<script> // import First from './components/First.vue' export default { 
 name: 'App', components: { 
 // First } } </script>
<style> #app { 
 font-family: Avenir, Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-align: center; color: #2c3e50; margin-top: 60px; } </style>

编写router文件夹下的index.js

在这里使用router配置各种路径

import Vue from 'vue'
import Router from 'vue-router'
Vue.use(Router)
// import A from '@/components/A'
// import B from '@/components/B'
export default new Router({ 

mode: 'history',
routes: [{ 

path: '/',
name: 'Index',
component: () => import('@/views'),
children: [{ 

path: '/user',
name: 'User',
component: () => import('@/views/user')
}
]
}
// ,
// { 

// path: '/user',
// name: 'User',
// component: () => import('@/views/user')
// }
// { 

// path: '/aaa',
// name: 'A',
// component: A
// },
// { 

// path: '/bbb',
// name: 'B',
// component: B
// }
]
})

编写公共部分的menu.vue

注意：在 el-menu 标签里注入router。

<template>
<el-menu router >
<el-submenu index="1">
<template slot="title">
<span>管理</span>
</template>
<el-menu-item-group>
<el-menu-item index="/user"> <i class="el-icon-location"></i>用户管理</el-menu-item>
<!-- <el-menu-item index="/menu"> <i class="el-icon-location"></i>菜单管理</el-menu-item> -->
</el-menu-item-group>
</el-submenu>
<!-- <el-submenu index="2"> <template slot="title"> <span>ElementUI组件</span> </template> <el-menu-item-group> <el-menu-item index="/table"> <i class="el-icon-location"></i>表格组件</el-menu-item> </el-menu-item-group> </el-submenu> -->
</el-menu>
</template>
<script> export default { 
 name: 'Menu' } </script>
<style> </style>

编写views下的index.vue

<template>
<el-container class="wrap">
<el-header class="header">
<el-row>
<el-col :span="20">信息系统</el-col>
<el-col :span="4">
<el-dropdown>
<span class="el-dropdown-link">
keafmd<i class="el-icon-arrow-down el-icon--right"></i>
</span>
<el-dropdown-menu slot="dropdown">
<el-dropdown-item command="Personal">个人设置</el-dropdown-item>
<el-dropdown-item command="Logout">退出</el-dropdown-item>
</el-dropdown-menu>
</el-dropdown>
</el-col>
</el-row>
</el-header>
<el-container>
<el-aside width="200px" class="aside">
<Menu></Menu>
</el-aside>
<el-main>
<!-- <User></User> -->
<router-view></router-view>
</el-main>
</el-container>
</el-container>
</template>
<script> // import User from './user/index.vue' import Menu from '@/components/menu' export default { 
 name: 'Index', components: { 
 Menu // User }, data() { 
 return { 
} }, methods: { 
 }, created() { 
} } </script>
<style scoped> .wrap { 
 height: 100vh; } .header { 
 border-bottom: 1px solid aqua; } .aside { 
 border-right: 1px solid aqua; } </style>

编写views下的user下的index.vue

<template>
<div>
<el-table :data="tableData.filter(data => !search || data.name.toLowerCase().includes(search.toLowerCase()))" style="width: 100%">
<el-table-column label="userName" prop="userName">
</el-table-column>
<el-table-column label="Password" prop="password">
</el-table-column>
<el-table-column align="right">
<template slot="header" slot-scope="scope">
<el-input v-model="search" size="mini" placeholder="输入关键字搜索" />
</template>
<template slot-scope="scope">
<el-button size="mini" @click="handleEdit(scope.$index, scope.row)">Edit</el-button>
<el-button size="mini" type="danger" @click="handleDelete(scope.$index, scope.row)">Delete
</el-button>
</template>
</el-table-column>
</el-table>
</div>
</template>
<script> import axios from 'axios'; axios.defaults.baseURL = 'http://127.0.0.1:8080/ssmtest'; export default { 
 name: 'User', components: { 
 }, data() { 
 return { 
 tableData: [], search: '' } }, methods: { 
 getData() { 
 axios.get('/user/findAll') .then((res) => { 
 this.tableData = res.data }) .catch(function(error) { 
 console.log(error); }); }, handleEdit(index, row) { 
 console.log(index, row); }, handleDelete(index, row) { 
 console.log(index, row); } }, created() { 
 this.getData(); } } </script>
<style> </style>

效果展示

查询效果：

看完如果对你有帮助，感谢点赞支持！
如果你是电脑端，看到右下角的 “一键三连” 了吗，没错点它[哈哈]

加油！

共同努力！

Keafmd

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SSM整合实现增删改查操作【保姆式教学】

SSM整合实现增删改查操作【保姆式教学】

准备工作

环境准备

数据库准备

开始干活

新建个Maven项目ssmtest，加上Web支持

添加依赖

完整的pom.xml

创建entity、dao、service、controller包

实体类编写

添加lombook

持久层接口编写

业务层接口编写

业务层实现类编写

表现层编写

整合步骤

保证 Spring 框架在 web 工程中独立运行

第一步：编写 spring 配置文件并导入约束

第二步：使用注解配置业务层

第三步：导入log4j.properties配置文件

第四步：测试 spring 能否独立运行

保证 SpringMVC 在 web 工程中独立运行

第一步：编写 SpringMVC 的配置文件

第二步：在 web.xml 中配置核心控制器（DispatcherServlet）

第三步：编写 Controller 和 jsp 页面

第四步：部署tomcat服务器

第五步：启动服务器，进行测试

Spring 整合 SpringMVC 的框架

第一步：配置监听器实现启动服务创建容器

第二步：在controller中注入service对象，调用service对象的方法进行测试

保证 MyBatis 框架在 web 工程中独立运行

第一步：在web项目中编写SqlMapConfig.xml的配置文件，编写核心配置文件

第二步：在IUserDao接口的方法上添加注解，编写SQL语句

第三步：编写测试的方法

Spring 整合 MyBatis 框架

第一步：把SqlMapConfig.xml配置文件中的内容配置到applicationContext.xml配置文件中

第三步：在IUserDao接口中添加@Repository注解

第四步：在UserServiceImpl中注入dao对象

第五步：修改 UserController 代码

第五步：修改 user_list.jsp 代码，实现显示账户信息

第六步：测试查询

第七步：测试保存

增删改查（前后端分离）

查找

前端vue项目

创建个空的vue项目

关闭代码格式化校验工具

安装相关的工具

目录结构

编写main.js

编写App.vue

编写router文件夹下的index.js

编写公共部分的menu.vue

编写views下的index.vue

编写views下的user下的index.vue

效果展示

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