package org.xh.Servlet;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class AjaxProxyServlet
*/
public class AjaxProxyServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public AjaxProxyServlet() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doPost(request, response);
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter pw = response.getWriter();
Enumeration paramNames = request.getParameterNames();
StringBuffer bfParams = new StringBuffer();
bfParams.append(request.getParameter("url")).append("?1=1");
while(paramNames.hasMoreElements()) {
String param = (String)paramNames.nextElement();
if("url".equals(param)){continue;}
bfParams.append("&").append(param).append("=").append(request.getParameter(param));
}
HttpURLConnection huc = null;
try {
// 取得连接
huc = (HttpURLConnection) new URL(bfParams.toString())
.openConnection();
// 设置连接属性
huc.setDoOutput(true);
huc.setRequestMethod("POST");
huc.setUseCaches(false);
huc.setInstanceFollowRedirects(true);
huc.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
huc.setConnectTimeout(50000);
huc.setReadTimeout(50000);
huc.connect();
// 参数
// DataOutputStream out = new DataOutputStream(huc
// .getOutputStream());
// // The URL-encoded contend
// // 正文,正文内容其实跟get的URL中'?'后的参数字符串一致
// String content = "sheng_code=" + URLEncoder.encode("江苏", "utf-8");
// // DataOutputStream.writeBytes将字符串中的16位的unicode字符以8位的字符形式写道流里面
// out.writeBytes(content);
//
// out.flush();
// out.close(); // flush and close
// 取得页面输出,并设置页面编码及缓存设置
response.setContentType(huc.getContentType());
response.setHeader("Cache-Control", huc.getHeaderField("Cache-Control"));
response.setHeader("Pragma", huc.getHeaderField("Pragma"));
response.setHeader("Expires", huc.getHeaderField("Expires"));
BufferedReader reader = new BufferedReader(new InputStreamReader(
huc.getInputStream(), "utf-8"));
String line;
while ((line = reader.readLine()) != null) {
pw.write(line);
}
reader.close();
} catch (Exception e) {
pw.write("outTime");
e.printStackTrace();
}finally{
huc.disconnect();
pw.flush();
pw.close();
}
}
}
调用:
function getDq() { var str = jQuery("#name").val(); $.ajax({ type : "post", async:false, data:{str : encodeURI(str),url:"访问地址"}, url : "http://localhost:8080/m/AjaxProxyServlet", success : function(data){ if("outTime"!=data){ alert(data); }else{ alert("网络连接超时!"); } }, error:function(){ alert('fail'); } }); }