android - 在 Android 上从任何容器(如 List)创建 GSON

Question

我有一个 java.util.List<Student>;而 Student 是一个简单的类，只有很少的属性，例如 String name , String forName , int id , double averageCredtis ;

在这段代码中:

class Student {
  private String foreName;
  private String surName;
  private int id;
  private double averageCredits;

  public Student(String f, String n, int id, double aCred)
  {
    this.foreName = f;
    this.surName = n;
    this.id = id;
    this. averageCredits = aCred;
  }
}

然后我在运行时创建多个对象:

Student a = new Student("Alice", "Aaa", 123, 1.6);
Student b = new Student("Bob", "Bbb", 223, 1.0);
Student c = new Student("Chris", "Ccc", 457, 3.6);

我曾经通过 myList.add(a); 将它们存储在一个 Listdt 中.

我想生成一个像这样的 GSON 字符串:

{ "GlobalVal": "Value", "GlobalNumber": "234", "Student": {"Surname": "Aaa","Forename": "Alice", "id": 123, >"averageCredit": 1.7 } "Student": {"Surname": "Bbb","Forename": "Bob", "id": >223,"averageCredit": 1.0 } }

Answer 1

创建一个名为Container的类

class Container{
    String globalVal;
    int globalInt;
    List<Student> students;
}

使用GSON将其转换为 JSON 的库。创建上述类的实例并存储值。

Container obj = new Container();
Gson gson = new Gson();

// convert java object to JSON format,
// and returned as JSON formatted string
String json = gson.toJson(obj);