<form >   姓名：<input name="name" type="text"/>   年齡：<input name="age" type="text"/>   <input type="button" class="get" value="get提交"/>   <input type="button" class="post" value="post提交"/>   <input type="button" class="ajax" value="ajax提交"/>   </form>   <div id="box"></div>

//getpublic void doGet(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {  response.setContentType("text/html");  response.setCharacterEncoding("utf-8");  response.setContentType("text/html;charset=utf-8");  String name = request.getParameter("name");  String age = request.getParameter("age");  if (name == null || name == "") {   name = "測試名字admin";  }  if (age == null || age == "") {   age = "測試年齡100";  }  user user = new user(1, name, age);  PrintWriter out = response.getWriter();  JSONObject jsonObj = JSONObject.fromObject(user);  out.print(jsonObj);  out.flush();  out.close(); }

//postpublic void doPost(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {  // response.setContentType("text/html");  request.setCharacterEncoding("utf-8");  response.setCharacterEncoding("utf-8");  response.setContentType("text/html;charset=utf-8");  String name = request.getParameter("name");  if (name == null || name == "") {   name = "測試名字admin";  }  String age = request.getParameter("age");  if (age == null || age == "") {   age = "測試年齡100";  }  user user = new user(1, name, age);  PrintWriter out = response.getWriter();  JSONObject jsonObj = JSONObject.fromObject(user);  out.print(jsonObj);  out.flush();  out.close(); }

<script type="text/javascript">  //get $(document).ready(function() {  $('form .get').click(function() {   $.get('ajaxServlet',function(response,status,xhr){    var dataObj = eval("(" + response + ")");    $("#box").html(response);    alert(dataObj.name);  }); }); //post $('form .post').click(function() {   $.post('ajaxServlet',function(response,status,xhr){    var dataObj = eval("(" + response + ")");    $("#box").html(response);  }); }); //ajax $('form .ajax').click(function() {  alert($("[name='name']").val());    $.ajax({    type:'get',    url:'ajaxServlet',    data:{    name:$("[name='name']").val(),    age:$("[name='age']").val()    },    success:function(response, status, xhr){    $("#box").html(response);}    }); }); });</script>