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。