对象数据绑定(Object Data Binding)
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小牛编辑
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2023-12-01
对象数据绑定是指将JSON映射到任何JAVA对象。
//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);
例子 (Example)
让我们看看对象数据的绑定。 在这里,我们将JAVA Object直接映射到JSON,反之亦然。
在C:\“GSON_WORKSPACE中创建名为GsonTester的Java类文件。
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+ " ]";
}
}
验证结果 (Verify the result)
使用javac编译器编译类如下 -
C:\GSON_WORKSPACE>javac GsonTester.java
现在运行GsonTester查看结果 -
C:\GSON_WORKSPACE>java GsonTester
验证输出。
{"name":"Mahesh","age":10}
Student [ name: Mahesh, age: 10 ]