org.apache.commons.httpclient 远程下载文件

package com.topcheer.img;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.SimpleHttpConnectionManager;import org.apache.commons.httpclient.methods.GetMethod;/** * Servlet implementation class ServletTest */public class ServletTest extends HttpServlet {private static final long serialVersionUID = 1L;           /**     * @see HttpServlet#HttpServlet()     */    public ServletTest() {        super();        // TODO Auto-generated constructor stub    }/** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {this.doPost(request, response);}/** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpClient client = new HttpClient();  GetMethod get = null; try                                                                   {                                                                         // hasActive();                                                                                     get = new GetMethod("http://172.16.104.78:8080/opticm-server/downloadImage?appId=kdkk&contentId=111111");                        int i = client.executeMethod(get);                                    if (200 == i)                                                          {                                                                         File storeFile = new File("d:/test.jpg");                               FileOutputStream output = new FileOutputStream(storeFile);            // 得到网络资源的字节数组,并写入文件                                  output.write(get.getResponseBody());                                  output.close();                                                   }else                                                                 {                                                                         System.out.println("no pic");                                     }                                                                 } catch ( Exception e )                                               {                                                                         System.out.println("no pic");                                     }finally{                                                                   get.releaseConnection(); client.getHttpConnectionManager().closeIdleConnections(0);  }}}