本文实例讲述了jQuery操作JSON的CRUD用法。分享给大家供大家参考。具体实现方法如下：
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Jquery ui</title>
<link href="css/jquery-ui-1.8.16.custom.css" rel="stylesheet" type="text/css" />
<script src="js/jquery-1.6.2.min.js" type="text/javascript"></script>
<script src="js/jquery-ui-1.8.16.custom.js" type="text/javascript"></script>
</head>
// Author By Eric Liang
<body>
<form>
<table border="1" id="personform">
<tr>
<td>id</id>
<td>name</td>
<td>sex</td>
<td>age</td>
<td>Delete Action</td>
<td>Update Action</td>
</tr>
</table>
</form>
id: <input type="text" id="userid" />
name: <input type="text" id="username"/>
sex: <input type="text" id="sex"/>
age: <input type="text" id="age"/>
<input type="button" value="add" onclick="addperson()"/>
</br>
id: <input type="text" id="update_userid" disabled="disabled" />
name: <input type="text" id="update_username"/>
sex: <input type="text" id="update_sex"/>
age: <input type="text" id="update_age" />
<input type="button" value="update" onclick="update()"/>
</body>
</html>
<script>
</script>
<script type="text/javascript">
var jsonObj = { teacher: [
{ id:'1', name: "Eric", sex: "m", age: "40" },
{ id:'2', name: "Ghost", sex: "m", age: "28" },
{ id:'3', name: "Didi", sex: "m", age: "27" }
]};
refresh();
function refresh() {
var persons = jsonObj.teacher;
$("tr[name='person']").remove();
for(var i=0; i<persons.length; i++) {
var cur_person = persons[i];
var cur_name = cur_person.name;
var cur_sex = cur_person.sex;
var cur_age = cur_person.age;
var cur_id = cur_person.id;
var idTd = "<td>"+ cur_id +"</td>";
var nameTd = "<td>"+ cur_name +"</td>";
var sexTd = "<td>"+ cur_sex +"</td>";
var ageTd = "<td>"+ cur_age +"</td>";
var deleteAction = "<td><a href='#' onclick='deleteperson(this)' name='";
deleteAction += cur_id +"'" +"</a>删除</td>"
var updateAction = "<td><a href='#' onclick='updateperson(this)' name='";
updateAction += cur_id +"'" +"</a>更新</td>"
//alert(deleteAction);
var trStr = "<tr name='person'>" + idTd;
trStr += nameTd;
trStr += sexTd;
trStr += ageTd;
trStr += deleteAction;
trStr += updateAction;
//alert(trStr);
$('#personform').append(trStr);
}
}
function checkPersonExist(targetId) {
var persons = jsonObj.teacher;
for(var i=0; i<persons.length; i++) {
var cur_person = persons[i];
if(cur_person.id == targetId) {
alert("添加失败! Id"+ targetId + "已经存在!");
return false;
}
}
return true;
}
function addperson() {
var userid = $('#userid').val();
var flag = checkPersonExist(userid);
if(flag == false) {
return false;
}
var username = $('#username').val();
var sex = $('#sex').val();
var age = $('#age').val();
var newPerson = "{id:" + "'"+userid+"'" +","+ "name:"+ "'"+username+"'"+","+ "sex:"+"'"+sex + "'"+"," + "age:"+"'"+age+"'" +"}";
newPerson = eval("(" + newPerson + ")");
//$('#personform').append(trStr);
jsonObj.teacher.push(newPerson);
refresh();
}
function deleteperson(obj) {
//alert(obj.name);
var delId = obj.name;
var persons = jsonObj.teacher;
for(var i=0; i<persons.length; i++) {
var cur_person = persons[i];
if(cur_person.id == delId) {
persons.splice(i,1);
}
}
refresh();
}
function updateperson(targetId) {
var updateId = targetId.name;
var persons = jsonObj.teacher;
for(var i=0; i<persons.length; i++) {
var cur_person = persons[i];
if(cur_person.id == updateId) {
var cur_id = cur_person.id
var cur_name = cur_person.name;
var cur_sex = cur_person.sex;
var cur_age = cur_person.age;
$('#update_userid').attr('value',cur_id);
$('#update_username').attr('value',cur_name);
$('#update_sex').attr('value',cur_sex);
$('#update_age').attr('value',cur_age);
}
}
}
function update() {
var cur_id = $('#update_userid').val();
var cur_name = $('#update_username').val();
var cur_sex = $('#update_sex').val();
var cur_age = $('#update_age').val();
var persons = jsonObj.teacher;
for(var i=0; i<persons.length; i++) {
var userId = persons[i].id;
if(cur_id == userId) {
persons[i].name = cur_name;
persons[i].age = cur_age;
persons[i].sex = cur_sex;
}
}
refresh();
}
</script>
希望本文所述对大家的jQuery程序设计有所帮助。