如何从GSON变量的值 [英] How to get variable's value from Gson

问题描述

首先，我是一个在begiiner所以GSON请多多包涵。

First, im a begiiner in GSON so please bear with me.

我有这种结构的一组类：

I have a set of classes with this structure :

class Response
  Data data;

class Data
  List<Item> items;

class Item
  String id;
  String title;
  Private Player;

class Player
  String mobile;

使用

林这些类检索与GSON库中的JSON。

Im using those class to retrieve the JSON with GSON library.

我成功地与这code检索JSON数据：

I successfully retrieve the JSON data with this code :

Gson gson = new Gson();
Response myResponse = gson.fromJson(inputStreamReader, Response.class);

当我调试code，我可以看到项目类值中的 myResponse 。但是，我有一个问题，当我要访问标题在项变量类，因为我只有一个响应类。

When i debug the code, i can see the Item class value is successfully retrieved inside the myResponse. However, i have a problem when i want to access the title variable in the Item Class because all i have is a Response Class.

在 如何获得标题变量项目类？

任何帮助apprciated，感谢您的帮助。

Any help is apprciated, Thanks for your help.

推荐答案

如果您有公共属性（通常的一个不好的做法），你可以这样做：

If you have public attributes (which is usually a bad practice!) you can just do:

//This will iterate over all items
for (Item item : myResponse.data.items) {
    //for each item now you can get the title
    String title = myItem.title;
}

---

无论如何，我说，你应该让你的属性私人，并拥有的 getter和setter 的这些属性。这是Java的基础！

---

Anyway, as I said, you should make your attributes private, and have getters and setters for those attributes. That's Java basics!

也就是说，在你的响应类，你应该是这样的：

Namely, in your Response class, you should have something like:

private Data data;

public Data getData(){
    return this.data;
}
public void setData(Data data){
    this.data = data;
}

在以同样的方式，你应该有私人属性和getter和setter方法​​在各类课程。

In the same way, you should have private attributes and getters and setters in all your classes.

所以，现在你可以访问以恰当的方式您的项目：

So now you can access your items in the proper way with:

//Get the Data object with the getter method
Data data = myResponse.getData();
for (Item item : data.getItems()) {
    String title = myItem.getTitle();
}

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