Gson對(duì)象數(shù)據(jù)綁定

對(duì)象數(shù)據(jù)綁定是指將JSON映射到任何JAVA對(duì)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(duì)象數(shù)據(jù)綁定的行動(dòng)。 這里將JAVA對(duì)象直接映射到JSON，反之亦然。參考實(shí)現(xiàn)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(zhí)行上面示例代碼，得到以下結(jié)果 -

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