$(function () {
 $.ajaxSetup({
 async:false
 });
 var url = "/Task/Fenlei"; //servlet的url
 data = {};
 data.flag = "all";
 $.post(url,data,function (result) {
 for(var i=0;i<result.getAll.length;i++){
 var id = result.getAll[i].fenlei_Id;
 var name = result.getAll[i].fenlei_Name;
 var newrow = "<tr id='tr"+id+"'><td>"+result.getAll[i].fenlei_Id+"</td><td id='td"+id+"'>"+result.getAll[i].fenlei_Name+
 "</td><td><button onclick='del("+id+")''>刪除</button><button onclick='edit("+id+")'>修改</button></td></tr>"
 $("#AllInfo tr:last").after(newrow);
 }
 },"json");
 $("#add").click(function () {
 addData={};
 var name = $("#name").val();
 addData.name = name;
 addData.flag = "add";
 $.post(url,addData,function (result) {
 var id = result.aFenlei.fenlei_Id;
 var name = result.aFenlei.fenlei_Name;
 var newrow = "<tr id='tr"+id+"'><td>"+result.aFenlei.fenlei_Id+"</td><td id='td"+id+"'>"+result.aFenlei.fenlei_Name+
 "</td><td><button onclick='del("+id+")'>刪除</button><button onclick='edit("+id+")'>修改</button></td></tr>"
 $("#AllInfo tr:last").after(newrow);
 
 
 },"json");
 });
});
function del(id) {
 console.log(id);
 var url = "/Task/Fenlei";
 delData = {};
 delData.flag = "delete";
 delData.id = id;
 $.post(url,delData,function (result) {
 if(result) {
 alert("刪除成功");
 $("#tr"+id).remove();
 } else {
 alert("刪除失敗");
 }
 },"json");
};
function edit(id) {
 var url = "/Task/Fenlei";
 editData = {};
 editData.flag = "update";
 var oldname = $("#td"+id).text();
 $("#td"+id).html("<input type='text'class='Input' id='new' name='FenleiName' value='"+oldname+"'/>");
 $("#new").blur(function () {
 var newname = $(".Input").val();
 editData.newname = newname;
 console.log(newname);
 $("#td"+id).html("<td id='td"+id+"'>"+newname+"</td>");
 $.post(url,editData,function(result){
 if(result) {
 alert("修改成功");
 } else {
 alert("修改失敗");
 }
 },"json");
 });
}

<%@include file="../inc/top.jsp"%>
<script src="Fenlei.js"></script>
<div class="Classify">
 <h3 align="center">項目管理信息表</h3>
 <div class="divBack">
 <img src="#" />
 </div>
 <div class="divAdd">
 分類名稱：<input type="text" id="name"/>
 <button type="button" class="btn-primary" id="add">添加</button>
 </div>
 <table class="table"id="AllInfo">
 <tr>
 <th>分類Id</th>
 <th>分類名稱</th>
 <th>操作</th>
 </tr>
 </table>
</div>
<%@include file="../inc/bottom.jsp"%>

public class FenleiServlet extends HttpServlet {
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 doGet(request,response);
 }
 protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 request.setCharacterEncoding("utf-8");
 response.setCharacterEncoding("utf-8");
 String name = request.getParameter("name"); //項目分類名稱
 String flag = request.getParameter("flag");
 String id = request.getParameter("id"); //項目分類Id
 FenleiService cs = new FenleiService();
 JSONObject json = new JSONObject();
 if("all".equals(flag)) {
 List<FenleiBean> list = cs.getAll(); //獲取所有的項目分類信息
 json.put("getAll",list);
 response.getWriter().print(json.toJSONString());
 }
 if("add".equals(flag)) { //增加操作。
 FenleiBean cb = cs.add(name);
 json.put("aFenlei",cb);
 response.getWriter().print(json.toJSONString());
 }
 if("delete".equals(flag)) { //刪除操作
 boolean result = cs.delete(id);
 System.out.println(flag);
 System.out.println(result);
 if(result){
 json.put("result",result);
 json.put("msg","刪除成功");
 response.getWriter().print(json.toJSONString());
 System.out.println(json.toJSONString());
 } else {
 json.put("result",result);
 json.put("msg","刪除失敗");
 response.getWriter().print(json.toJSONString());
 }
 }
 if("update".equals(flag)) { //更新信息
 System.out.println(flag);
 String newname = request.getParameter("newname");
 System.out.println("---------------update newname"+newname);
 boolean result = cs.update(newname);
 if(result){
 json.put("result",result);
 json.put("msg","修改成功");
 response.getWriter().print(json.toJSONString());
 System.out.println(json.toJSONString());
 } else {
 json.put("result",result);
 json.put("msg","修改失敗");
 response.getWriter().print(json.toJSONString());
 }
 }
 }
}

</pre><pre name="code" class="javascript">