java——IO流01

移动文件有一种简单方法，不需要复制文件再删除文件。

package com.unir.test01;

import java.io.File;
import java.io.IOException;

public class Test02 {


     public static void main(String[] args) throws IOException {
        //创建文件
        File f=new File("d:\developer\6.txt");
        f.renameTo(new File("E:\英雄时刻"));//移动到e盘
        f.delete();//删除
     }

}

 

 

 

使用FileInputStream类的read(byte[])方法和FileOutputStream类的write（byte[]）方法实现文件移动。

       已知文件：d:\developer\56.txt

       目标地址：e:\英雄时刻\56.txt

package com.unir.test01;




import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;

public class Test01 {



	/*	已知文件：d:/developer/12345.txt
		目标地址：e:/英雄时刻/12345.txt
	*/

     public static void main(String[] args) throws IOException {
    	 //创建文件
    	 File f=new File("d:\developer\12345.txt");
    	 //创建字符
    	 String txt="nice.";
    	 byte[] b=txt.getBytes();
    	 FileOutputStream fos=new FileOutputStream(f);
    	 fos.write(b);
    	 
    	 
    	//创建输入流
        FileInputStream input = new FileInputStream("d:/developer/12345.txt");
        //创建输出流
        FileOutputStream output = new FileOutputStream("e:/英雄时刻/12345.txt");
        int len = 0;
        byte[] buf = new byte[1024];
        if((len = input.read(buf)) > -1){
            output.write(buf, 0 , len);
        }
      
        
        
        fos.close();
        input.close();
        output.close();
        f.delete();
        

     }
     

}

　　

使用BufferedInputStream类的read方法和BufferedOutputStream类的write方法实现文件移动。

　

  　已知文件：d:\developer\56.txt

      目标地址：e:\英雄时刻\56.txt

package com.unir.test01;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class Test04 {
	   public static void main(String[] args) throws IOException {
	    	FileInputStream f=new FileInputStream("D:\developer\9.txt");
	    	InputStreamReader i=new InputStreamReader(f,"utf-8");
	    	FileOutputStream f1=new FileOutputStream("e:\英雄时刻\9.txt",true);
	    	BufferedOutputStream b=new BufferedOutputStream(f1);
	    			
	        int len = 0;
	        byte[] buf = new byte[1024];
	        if((len = i.read()) != -1){
	            b.write(buf, 0 , len);
	        }
	        b.close();
	        i.close();
	        File file=new File("D:\developer\9.txt");
	        file.delete();
	     }

}

　　从键盘读入“Java IO流的分类”，并将这些文字写入文件d:\developer\9.txt，然后将该文件复制到e:\英雄时刻\9.txt

package com.unir.test01;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class Test04 {
	   public static void main(String[] args) throws IOException {
	    	FileInputStream f=new FileInputStream("D:\developer\9.txt");
	    	InputStreamReader i=new InputStreamReader(f,"utf-8");
	    	FileOutputStream f1=new FileOutputStream("e:\英雄时刻\9.txt",true);
	    	BufferedOutputStream b=new BufferedOutputStream(f1);
	    			
	        int len = 0;
	        byte[] buf = new byte[1024];
	        if((len = i.read()) != -1){
	            b.write(buf, 0 , len);
	        }
	        b.close();
	        i.close();
	        File file=new File("D:\developer\9.txt");
	        file.delete();
	     }

}

　　

中。