Http02App.java
1.使用两个工具类 实现下载音乐和图片到本地硬盘中

package main;

import Http.FileUtils;
import Http.HttpUtils;

import java.io.IOException;


/**
 * Created by lxj-pc on 2017/6/27.
 */
public class Http02App {
    static String imgurl = "https://ss0.bdstatic.com/5aV1bjqh_Q23odCf/static/superman/img/logo/bd_logo1_31bdc765.png";
    static String mp3url = "http://static.iyuba.com/sounds/voa/201706/5172.mp3";

    public static void main(String[] args) {
        //下载图片
        new Thread() {
             public void run() {
                 byte[] bytes = new byte[0];
                 try {
                     bytes = HttpUtils.get(imgurl);
                 } catch (IOException e) {
                     e.printStackTrace();
                 }

                 //将下载完成的图片保存到本地
                //
                 try {
                     FileUtils.saveImg(bytes,"d:/lxj/picture",
                             System.currentTimeMillis()+".jpg");
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
                 System.out.println("图片下载保存到本地ok！");

            }
        }.start();

    }
}

Http02App 整合两个工具类实现下载文件