Update an HTML Form Using an XML ActiveX Object and a Servlet

import javax.servlet.*; import javax.servlet.http.*; import java.io.*; public class UserInfoServlet extends HttpServlet { private static final String CONTENT_TYPE = "text/xml"; //Process the HTTP Get request public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } //Process the HTTP Post request public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String login = request.getParameter("login"); String info = null; if (login != null && "guest".equalsIgnoreCase(login)) { info = "<username>Guest</username>"; } else { info = "<username>Unknown</username>"; } response.setContentType(CONTENT_TYPE); PrintWriter out = response.getWriter(); out.println("<?xml version=\"1.0\"?>"); out.println("<output>"); out.println(info); out.println("</output>"); } }

<servlet> <servlet-name>userinfo</servlet-name> <servlet-class>UserInfoServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>userinfo</servlet-name> <url-pattern>/ui</url-pattern> </servlet-mapping>

<html> <head><title>User Information</title></head> <body> <form name="userinfo"> Enter Login Id: <input type="text" name="login" onblur="javascript:doLoadData(this.value)" /> User Information: (Readonly) <input type="text" name="username" readonly="readonly" /> </form> </body> <script language="JavaScript1.4" type="text/javascript"> function doLoadData(login) { var dd = new ActiveXObject("MSXML.DOMDocument"); dd.async = false; dd.load('/context/ui?login=' + login); var node = dd.documentElement.selectSingleNode("/output/username"); document.forms['userinfo'].elements['username'].value = node.text; } </script> </html>