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1. 对象转为字符串
使用JSON.stringfy()
JSON.stringify()将javascript对象转换为通过Web服务器发送数据所需的字符串。
语法：
JSON.stringify(obj)
参数：可以是对象，数组。
const obj = { id: 0, name: '张三', age: 12 } const objToStr =
JSON.stringify(obj) console.log('obj:', obj) // obj: {id: 0, name: '张三', age:
12} console.log('objToStr:', objToStr) // objToStr:
{"id":0,"name":"张三","age":12}
参数为数组(对象数组)
var obj_to_str={ name: "GeeksForGeeks", city: "Noida", contact:2488 };
var myJSON = JSON.stringify(obj_to_str); console.log(myJSON) //
{"name":"GeeksForGeeks","city":"Noida","contact":2488}
使用toString为什么不行
{}.toString();//报错，Unexpected token . ({}).toString();//[object Object]
({a:123}).toString();//[object Object] Object.toString();//"function Object() {
[native code] }" function Person(){ this.name = 'test'; } var person1 = new
Person(); person1.toString();//"[object Object]"
2. json字符串转为对象
使用parse方法
const str = '{"id":0,"name":"张三","age":12}' const strToObj = JSON.parse(str)
console.log('str:', str) // str: {"id":0,"name":"张三","age":12}
console.log('strToObj:', strToObj) // strToObj: {id: 0, name: '张三', age: 12}