描述
json常用方法,json如何使用,json是什么,json的作用
代码说明
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
<script>
//json对象,常用来客户端向服务端发送数据
var student = {sid:1,sname:"aa",age:23};
//alert(student.sname);
for(x in student){
//alert(x);
//alert(student[x]);
}
var arr = [{sid:1,sname:"aa",age:23},{sid:2,sname:"bb",age:24},{sid:3,sname:"cc",age:25}];
for(var i = 0; i < arr.length; i++){
//alert(arr[i].age);
}
//服务端常返回json字符串给客户端,解析json字符串为json对象
var student_str = "{sid:1,sname:'aa',age:23}";
student_str = "var stundent = "+student_str;
eval(student_str);//执行表达式
alert(student.sname);
</script>
</body>
</html>
运行代码效果