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);
		  }

	}

}