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$(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">