Java反射

package com.yimei.test;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.httpclient.methods.GetMethod;

import com.yimei.util.HttpUtils;

public class TestProxy extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
 
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  doPost(request,response);
 }   
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
  
  Enumeration<String> e=request.getHeaderNames();
  
  
  String url=request.getParameter("url");
  
  System.out.println("===url==="+url);
   
  OutputStream so=response.getOutputStream();
  
  GetMethod method = new GetMethod(url);
  
  while(e.hasMoreElements()){
   String key=e.nextElement();
   String value=request.getHeader(key);
   
   method.addRequestHeader(key, value);
   
  }
 
  try {
   int code = HttpUtils.client.executeMethod(method);
   
   if(code==200){
    ByteArrayOutputStream buffer = new ByteArrayOutputStream();
    InputStream stream = method.getResponseBodyAsStream();
    
    byte[] buf = new byte[1024*512];
    while(true) {
     int count = stream.read(buf);
     if(count<=0) break;
     //buffer.write(buf,0,count);
     so.write(buf,0,count);
    }
    
    //String s=new String(buffer.toByteArray());
    
    //System.out.println("===ssss==="+s);
    
    //response.getWriter().write(s);
   }
   
  } catch(Exception ee){
   
   ee.printStackTrace();
  }finally{
   method.releaseConnection();
  }
  
  
 }

}