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Object data binding refers to mapping of JSON to any JAVA Object.
//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);
Example
Let”s see object data binding in action. Here we”ll map JAVA Object directly to JSON and vice versa.
Create a Java class file named GsonTester in C:>GSON_WORKSPACE.
File – 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(10); student.setName("Mahesh"); 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+ " ]"; } }
Verify the result
Compile the classes using javac compiler as follows −
C:GSON_WORKSPACE>javac GsonTester.java
Now run the GsonTester to see the result −
C:GSON_WORKSPACE>java GsonTester
Verify the output.
{"name":"Mahesh","age":10} Student [ name: Mahesh, age: 10 ]
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