如何正确地将对象放入JSONObject? [英] How to put object into JSONObject properly?

问题描述

我试图像这样填充我的JSONObject:

I'm trying to fill my JSONObject like this:

JSONObject json = new JSONObject();
json.put("Command", "CreateNewUser");
json.put("User", user);

user是基本类的实例，其中包含诸如名字"，姓氏"等字段.

user is instance of basic class that contains fields like "FirstName", "LastName" etc.

看起来我做错了，因为我得到了这样的JSON:

Looks like I'm doing it wrong, because I get JSON like this:

{
    "Command":"CreateNewUser",
    "User":"my.package.name.classes.User@2686a150"
}

而不是"tree".

instead of "tree".

我的代码有什么问题?

推荐答案

由于使用JSONObject表示非原始类型，因此传递给JSONObject.put(Object, Object)的任何实例都将生成嵌套项(或树 >).

Since you use JSONObject to represent non-primitive types, any instance passed to JSONObject.put(Object, Object) will generate nested items (or trees).

JSONObject main = new JSONObject();
main.put("Command", "CreateNewUser");
JSONObject user = new JSONObject();
user.put("FirstName", "John");
user.put("LastName", "Reese");
main.put("User", user);

{
    "User": {
        "FirstName": "John",
        "LastName": "Reese"
    },
    "Command": "CreateNewUser"
}

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