JSON-语法-值的获取
获取数据:
1. json对象.键名
2. json对象[ " 键名 " ]
3. 数组对象[ 索引 ]
4. 遍历
JSON值的获取
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script>
//定义基本格式
var person = {"name":"张三",age: 23,'gender':true};
//获取name的值
// let name = person.name;
var name = person["name"];
//alert(name)
//alert(person)
//2.嵌套格式 {}--->[]
var persons={"persons":[
{"name":"张三","age":18,"gender":true},
{"name":"李四","age":18,"gender":true},
{"name":"王五","age":18,"gender":false}
]
};
//获取王五值
let name1 = persons.persons[2].name;
// alert(name1)
//2.嵌套格式 []--->{}
var ps = [
{"name":"张三","age":18,"gender":true},
{"name":"李四","age":18,"gender":true},
{"name":"王五","age":18,"gender":false}
];
//获取李四值
alert(ps[1].name)
</script>
</head>
<body>
</body>
</html>
JSON数据语法遍历
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script>
//定义基本格式
var person = {"name":"张三",age: 23,'gender':true};
var ps = [
{"name":"张三","age":18,"gender":true},
{"name":"李四","age":18,"gender":true},
{"name":"王五","age":18,"gender":false}
];
//获取person对象中所有的键和值
//for in 循环
/* for (var key in person){
//这样的获取方式不行.因为相当于 person."name"
// alert(key+":"+person.key)
alert(key+":"+person[key]);
}*/
//获取ps中的所有值
for (var i = 0;i<ps.length;i++){
var p = ps[i];
for (var key in p){
alert(key+":"+p[key])
}
}
</script>
</head>
<body>
</body>
</html>
标签：name,person,gender,age,语法,获取,JSON,18,var From： https://www.cnblogs.com/xuche/p/17113838.html