Android开发之下载服务器上的一张图片到本地java代码实现HttpURLConnection

package com.david.HttpURLConnectionDemo;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

public class Test02 {

	/**
	 * HttpURLConnection
	 *    下载服务器上的一张图片到本地
	 * @param args
	 * 联系QQ：986945193
     *
      * 微博：http://weibo.com/mcxiaobing
	 */
	public static void main(String[] args) {
		try {
			URL url = new URL("http://10.2.163.69:8080/SZ1507Web/img/dog01.jpg");
			HttpURLConnection conn =  null;
			try {
				URLConnection urlCon = url.openConnection(); // 获取一个URLConnection
				conn = (HttpURLConnection)urlCon;
				conn.setConnectTimeout(5000);//设置连接超时时长
				int code = conn.getResponseCode();//返回连接状态
				if(code == 200){ //表示连接成功
					System.out.println("连接成功...");
					InputStream is = null;
					OutputStream os = null;
					try{
						is = conn.getInputStream(); //获取 输入流
						os = new FileOutputStream("dog1.jpg");
						byte b[] = new byte[1024];
						int num = 0;
						while((num = is.read(b)) != -1){
							os.write(b,0,num);
						}
					}catch(IOException e){
						e.printStackTrace();
					}finally{
						is.close();
						os.close();
					}
				}else{
					System.out.println("网络连接异常");
				}
			} catch (IOException e) {
				e.printStackTrace();
			}finally{
				conn.disconnect();//关闭
				System.out.println("文件下载完成...");
			}
		} catch (MalformedURLException e) {
			e.printStackTrace();
		}

	}

}