Gson對象數據綁定

對象數據綁定是指將JSON映射到任何JAVA對象。

//Create a Gson instance
Gson gson = new Gson();

//map Student object to JSON content
String jsonString = gson.toJson(student);

//map JSON content to Student object
Student student1 = gson.fromJson(jsonString, Student.class);

示例

讓我們看看對象數據綁定的行動。 這裏將JAVA對象直接映射到JSON，反之亦然。參考實現代碼:GsonTester.java -

import com.google.gson.Gson;

public class GsonTester {
   public static void main(String args[]) {
      Gson gson = new Gson();
      Student student = new Student();
      student.setAge(26);
      student.setName("Maxsu");

      String jsonString = gson.toJson(student);
      System.out.println(jsonString);

      Student student1 = gson.fromJson(jsonString, Student.class);
      System.out.println(student1);
   }
}
class Student {
   private String name;
   private int age;
   public Student(){}

   public String getName() {
      return name;
   }
   public void setName(String name) {
      this.name = name;
   }
   public int getAge() {
      return age;
   }
   public void setAge(int age) {
      this.age = age;
   }
   public String toString() {
      return "Student [ name: "+name+", age: "+ age+ " ]";
   }
}

執行上面示例代碼，得到以下結果 -

{"name":"Maxsu","age":26}
Student [ name: Maxsu, age: 26 ]