Gson如何序列化内部类

Gson如何序列化内部类

1 Gson处理成员内部类

1.1 编写核心类

MainApp：

package com.yiidian.gson;

import com.google.gson.Gson;

public class MainApp {

public static void main(String args[]) {

Student student = new Student();

student.setRollNo(1);

Student.Name name = student.new Name();

name.firstName = "Mahesh";

name.lastName = "Kumar";

student.setName(name);

Gson gson = new Gson();

//序列化

String jsonString = gson.toJson(student);

System.out.println(jsonString);

//反序列化

student = gson.fromJson(jsonString, Student.class);

System.out.println("Roll No: "+ student.getRollNo());

System.out.println("First Name: "+ student.getName().firstName);

System.out.println("Last Name: "+ student.getName().lastName);

String nameString = gson.toJson(name);

System.out.println(nameString);

name = gson.fromJson(nameString,Student.Name.class);

System.out.println(name.getClass());

System.out.println("First Name: "+ name.firstName);

System.out.println("Last Name: "+ name.lastName);

}

}

class Student {

private int rollNo;

private Name name;

public int getRollNo() {

return rollNo;

}

public void setRollNo(int rollNo) {

this.rollNo = rollNo;

}

public Name getName() {

return name;

}

public void setName(Name name) {

this.name = name;

}

//成员内部类

class Name {

public String firstName;

public String lastName;

}

}

1.2 运行测试

2 Gson处理静态内部类

2.1 编写核心类

MainApp：

package com.yiidian.gson;

import com.google.gson.Gson;

public class MainApp {

public static void main(String args[]) {

Student student = new Student();

student.setRollNo(1);

Student.Name name = new Student.Name();

name.firstName = "Mahesh";

name.lastName = "Kumar";

student.setName(name);

Gson gson = new Gson();

String jsonString = gson.toJson(student);

System.out.println(jsonString);

student = gson.fromJson(jsonString, Student.class);

System.out.println("Roll No: "+ student.getRollNo());

System.out.println("First Name: "+ student.getName().firstName);

System.out.println("Last Name: "+ student.getName().lastName);

String nameString = gson.toJson(name);

System.out.println(nameString);

name = gson.fromJson(nameString,Student.Name.class);

System.out.println(name.getClass());

System.out.println("First Name: "+ name.firstName);

System.out.println("Last Name: "+ name.lastName);

}

}

class Student {

private int rollNo;

private Name name;

public int getRollNo()http:// {

return rollNo;

}

public void setRollNo(int rollNo) {

this.rollNo = rollNo;

}

public Name getName() {

return name;

}

public void setName(Name name) {

this.name = name;

}

//静态内部类

static class Name {

public String firstName;

public String lastName;

}

}

2.2 运行测试

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