用AjaxProxyServlet 跨域ajax请求

关键字:   java ajax    

老庄的代码里用了DataInputStream，这个类的readLine()不被推荐使用，所以换成了 InputStreamReader 添加了代码来处理Ajax请求中的参数。 java 代码 /* * Created on 2007-1-16 */ import javax.servlet.http.HttpServlet; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.URL; import java.util.Enumeration; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class AjaxProxyServlet extends HttpServlet { protected void service(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { resp.setContentType("text/html"); PrintWriter pw = resp.getWriter(); Enumeration paramNames = req.getParameterNames(); StringBuffer bfParams = new StringBuffer(); bfParams.append(req.getParameter("url")).append("?1=1"); while(paramNames.hasMoreElements()) { String param = (String)paramNames.nextElement(); if("url".equals(param)){continue;} bfParams.append("&").append(param).append("=").append(req.getParameter(param)); } URL url = new URL(bfParams.toString()); BufferedReader bf = new BufferedReader(new InputStreamReader(url.openStream())); String line; while ((line = bf.readLine()) != null) { pw.println(line); } bf.close(); } }