前端HTML<body> <button id="getvalue"> 请点击 </button> <div id = "value"></div> </body>Ajax代码$("#getvalue").click(function(){ $.ajax({ url:"/servlet/doajax", cache:true, type:"GET", data:{username:"admin"}, async:false, datatype:"html", error:function(request){ alert("cuowu"); }, success:function(data){ $("#value").html(data); } }); });servlet代码public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); String username = request.getParameter("username"); System.out.println(username); PrintWriter out = response.getWriter(); out.print("welcome "+username); out.flush(); out.close(); }xml配置 <servlet> <description>This is the description of my J2EE component</description> <display-name>This is the display name of my J2EE component</display-name> <servlet-name>doajax</servlet-name> <servlet-class>servlet.doajax</servlet-class> </servlet> <servlet-mapping> <servlet-name>doajax</servlet-name> <url-pattern>/servlet/doajax</url-pattern> </servlet-mapping>
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