1. 对象转为字符串

const obj = {     id: 0,     name: '张三',     age: 12}const objToStr = JSON.stringify(obj)console.log('obj:', obj)console.log('objToStr:', objToStr)

2. json字符串转为对象

const str = '{"id":0,"name":"张三","age":12}'const strToObj = JSON.parse(str)console.log('str:', str)console.log('strToObj:', strToObj)