如何在不获取空对象的情况下使用JSON.stringify和JSON.parse？ [英] How to JSON.stringify and JSON.parse without getting an empty object?

问题描述

我问这个问题的原因是因为我想将LocalStorage用于我的对象。正如您可能知道的，当使用LocalStorage时，您必须对对象进行JSON.stringify，然后将它们解析回javascript对象。

the reason I am asking this question is because I want to use LocalStorage for my objects. And as you might know, when using LocalStorage you have to JSON.stringify the objects and then parse them back to javascript objects.

我正在尝试JSON.stringify一个对象使用方法，然后解析它，但我得到的只是一个空对象。

I am trying to JSON.stringify an object with methods and then parse it back but all I get is an empty object.

请看一下这段代码。

Person.js

function Person(name, telePhone) {

this.getName = function () {
    return name;
}

this.setName = function (_name) {
    name = _name;
}

this.getTelePhone = function () {
    return telePhone;
}

this.setTelePhone = function (_telePhone) {
    telepPhone = _telePhone;
}
};

Javascript.js

window.onload = function () {

var name = "John";
var telePhone = "073-2335662";

var personObject = new Person(name, telePhone);

console.log(personObject);
// returns: Person 
console.log(personObject.getName());
//returns: John

var test = JSON.stringify(personObject);
var newPersonObject = JSON.parse(test);

console.log(newPersonObject);
//returns: Object
console.log(newPersonObject.getName());
//returns: Uncaught TypeError: Object #<Object> has no method 'getName'
};

为什么在JSON.stringify和JSON.parse之后此Person对象为空并且丢失所有方法的任何建议？

Any suggestions why this Person object after JSON.stringify and JSON.parse is empty and loses all it's methods?

推荐答案

函数不是有效的JSON数据类型。当然，函数保存的变量范围也无法序列化。

Functions are not a valid JSON data type. And certainly the variable scope held by the functions can't be serialized.

您需要将数据直接存储在对象上以进行序列化。

You need to store data directly on the object to serialize it.

JSON有对象（键/值对）和数组（有序列表）样式结构，以及 string ， number ， true ， false ， null 。

JSON has "object" (key/value pair) and "array" (ordered list) style structures, as well as string, number, true, false, and null.

http://json.org/

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