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();		}	}}