var obj={
  name:'zhangsan',age:'18'}; /* * js对象--->JSON字符串 * JSON.stringify(js对象) --转化为--> JSON字符串 * */ console.log(obj);//Object {name: "zhangsan", age: "18"} console.log(JSON.stringify(obj));//{"name":"zhangsan","age":"18"} /* * JSON字符串-->js对象 * JSON.parse(JSON字符串)--转化为--> js对象 * */ var str = JSON.stringify(obj); console.log(typeof str); console.log(JSON.parse(str));//Object {name: "zhangsan", age: "18"}