今天抄两个Java的实现备用，第一段代码：

package org.proxy.servlet;

import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLDecoder;

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

public class ProxyServlet extends HttpServlet {

/**
*
*/
private static final long serialVersionUID = 4191419806910781940L;

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String query = null;
response.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
query = request.getParameter("url");
System.out.println(query);
//query = "http://www.google.cn/search hl=zh-CN&source=hp&q=proxy&btnG=Google+%E6%90%9C%E7%B4%A2&aq=f&oq=";
if (query == null) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Missing URL Parameter！");
return;
}
query = URLDecoder.decode(query);
PrintWriter out = response.getWriter();
int length = request.getContentLength();
byte[] bytes = new byte[length];
//System.out.println(length);
try{
URL url = new URL(query);
BufferedInputStream in = new BufferedInputStream(url.openStream());
System.out.println(in.read(bytes,0,length));
in.close();
out.print(bytes);
out.flush();
out.close();
}catch(IOException e){
response.sendError(HttpServletResponse.SC_NOT_FOUND, "Exception:"+e);

}

}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

String query = null;
response.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
query = request.getParameter("url");
System.out.println(query);
//query = "http://www.google.cn/search hl=zh-CN&source=hp&q=proxy&btnG=Google+%E6%90%9C%E7%B4%A2&aq=f&oq=";
if (query == null) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Missing URL Parameter！");
return;
}
query = URLDecoder.decode(query);
PrintWriter out = response.getWriter();
int length = request.getContentLength();
byte[] bytes = new byte[length];
//System.out.println(length);
try{
URL url = new URL(query);
BufferedInputStream in = new BufferedInputStream(url.openStream());
System.out.println(in.read(bytes,0,length));
in.close();
out.print(bytes);
out.flush();
out.close();
}catch(IOException e){
response.sendError(HttpServletResponse.SC_NOT_FOUND, "Exception:"+e);

}

}


}

下面是第二段代码：

package org.gwtopenmaps.openlayers.server;