<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>json_str</title>
</head>
<body>
<script>
/*json对象转化成字符串要通过JSON.stringify()方法显示转换，不能通过“+”和字符串拼接隐式转换。*/
let obj = {
id: 0,
name: '张三',
age: 12
};
let str = JSON.stringify(obj);
console.log('obj:', obj);
// obj: {id: 0, name: "张三", age: 12}
console.log(typeof obj);
// object
console.log('str:', str);
// str: {"id":0,"name":"张三","age":12}
console.log(typeof str);
// string
console.log("");
str = '{"id":0,"name":"张三","age":12}';
obj = JSON.parse(str);
console.log('str:', str);
// str: {"id":0,"name":"张三","age":12}
console.log(typeof str);
// string
console.log('obj:', obj);
// obj: {id: 0, name: "张三", age: 12}
console.log(typeof obj);
// object
// 此函数用于把 字符串形式的json对象，转化成obj。
function str2obj(str){
let obj = JSON.parse(str);
return obj;
}
console.log(str2obj(str));
// {id: 0, name: "张三", age: 12}
</script>
</body>
</html>
js json对象和字符串之间的转换
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转载自blog.csdn.net/weixin_42193179/article/details/85322985
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