利用输入输出流完成文件的复制

package com.ouya.zr.file;

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

import org.junit.Test;

public class TestCopy {
//Junit测试类
    @Test
    public void test(){

        long start  = System.currentTimeMillis();
        String src = "C:\\Users\\Administrator\\Desktop\\11.wmv";
        String dest = "C:\\Users\\Administrator\\Desktop\\12.wmv";
        copy(src, dest);
        long end  = System.currentTimeMillis();
        System.out.println("花费的时间为："+(end-start));
    }

    public void copy(String src,String dest){
        
        File f = new File(src);
        File f1 = new File(dest);
        FileInputStream fs = null;
        FileOutputStream fs1 = null;
        
        try {
            
            fs = new FileInputStream(f);
            fs1 = new FileOutputStream(f1);
            
            byte[] b = new byte[1024];
            int len;
            while((len=fs.read(b))!=-1){
                fs1.write(b, 0, len);
            }
            
        } catch (Exception e) {
            e.printStackTrace();
        }finally{
            if(fs!=null){
                try {
                    fs.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }finally{
                    if(fs1!=null){
                try {
                    fs1.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
                }
            }
            
        }
        System.out.println("复制完成"); }
    
}

代码一般，欢迎大家指点。