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
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
</body>
<script>
//获取json的值
var person = {"name":"code_g",age:18,‘gender‘:"male"};
// for (const key in person) {
// // alert(key + " : " + person.key); //person.key相当于person."name"
// alert(key + " : " + person[key]);
// }
var persons = {
"persons":{
"person1":{"name":"code_g",age:18,‘gender‘:"male"},
"person2":{"name":"code_z",age:18,‘gender‘:"female"},
"person3":{"name":"code_y",age:18,‘gender‘:"male"}
}
};
// alert(persons.persons.person1.name);
var ps = [
{"name":"code_g",age:18,‘gender‘:"male"},
{"name":"code_z",age:18,‘gender‘:"female"},
{"name":"code_y",age:18,‘gender‘:"male"}
];
ps.forEach(s => {
for (const key in s){
alert(key + " : " + s[key]);
}
});
</script>
</html>
原文：https://www.cnblogs.com/codegzy/p/14762307.html