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");
}
}