java 14 图片的读取和写入

package com.java14.myjava;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import org.junit.Test;

public class TestFileStream {

//字节流 处理图片 InputStream outputStream

//字符流 处理文本 Reader Writer

@Test

public void testcopyFile() throws Exception {

FileInputStream fis=new FileInputStream("D:\\java\\JPG\\tree.jpg");

FileOutputStream fos=new FileOutputStream("D:\\java\\JPG\\2.jpg");

byte[] Buffer =new byte[1024];

int len=0;

//只要不是-1就一直循环

while((len=fis.read(Buffer))!= -1 ){

//有多少写多少

fos.write(Buffer,0,len);

}

fis.close();

fos.close();

System.out.println("复制完毕");

}

}