java filestream_java FileStream文件流操作

直接上代码，函数使用说明详见Java API文档

import java.io.*;

public class StreamDemo

{

public static void main(String[] args)

{

File f=new File(“F:\\workspace\\JavaPrj\\test.txt”);

FileOutputStream out=null;

try

{

out=new FileOutputStream(f);

byte[] b=new String(“Hello,my name is cjc”).getBytes();

System.out.println(“\”Hello,my name is cjc\”has been writeen into “+f.getName()+”.”);

out.write(b);

out.close();

}

catch (FileNotFoundException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

catch (IOException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

try

{

FileInputStream in=new FileInputStream(f);

byte b[]=new byte[1024];

int cnt=0;

cnt=in.read(b);

//注意这里byte转化成String的方法

System.out.println(“\””+new String(b,0,cnt)+”\”has been read from “+f.getName()+”.”);

}

catch (FileNotFoundException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

catch (IOException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

原文：http://blog.csdn.net/cjc211322/article/details/24837239