json格式 （JavaScipt Object Notation）:是一种数据交换格式！
json语法规则：
01.对象表现形式 key:value 键值对
02.如果有多个数据，之间使用逗号隔开 k1:v1,k2:v2
03.把对象写在大括号中
var student={age:12,name:xx,address:xx};
04.把集合写在中括号里
var students=[
{age:12,name:xx,address:xx},
{age:12,name:xx,address:xx},
{age:12,name:xx,address:xx}
];
<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
</head>
<body>
<div id="div1"></div>
<select id="sel"></select>
<table border="1" id="myTable">
<tr>
<td>姓名</td>
<td>年龄</td>
<td>住址</td>
</tr>
</table>
<script type="text/javascript" src="js/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(function(){
//定义一个student对象 json格式
var student={name:"小白",age:15,address:"北京海淀区"};
$("#div1").append("姓名:"+student.name+"<br/>")
.append("年龄:"+student.age+"<br/>")
.append("住址:"+student.address+"<br/>");
/*********************************************************************/
var students=[
"小黑1",
"小黑2",
"小黑3",
"小黑4"
];
$(students).each(function(){
$("#sel").append("<option>"+this+"</option>")
});
/*********************************************************************/
var stus=[
{name:"小白1",age:15,address:"北京海淀区1"},
{name:"小白2",age:16,address:"北京海淀区2"},
{name:"小白3",age:17,address:"北京海淀区3"}
];
$(stus).each(function(){
$("#myTable").append("<tr><td>"+this.name+"</td><td>"
+this.age+"</td><td>"+this.address+"</td></tr>");
})
});
</script>
</body>
<html>