在本章中,我们将解释具有内部类的类的序列化/反序列化。
嵌套内部类示例
参考以下示例代码片段 -
Student student = new Student();
student.setRollNo(1);
Student.Name name = student.new Name();
name.firstName = "Max";
name.lastName = "Su";
student.setName(name);
//serialize inner class object
String nameString = gson.toJson(name);
System.out.println(nameString);
//deserialize inner class object
name = gson.fromJson(nameString,Student.Name.class);
System.out.println(name.getClass());
示例
让我们来看看一个内部类的序列化/反序列化。 创建一个名为GsonTester
的Java类文件:GsonTester.java -
import com.google.gson.Gson;
public class GsonTester {
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();
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() {
return rollNo;
}
public void setRollNo(int rollNo) {
this.rollNo = rollNo;
}
public Name getName() {
return name;
}
public void setName(Name name) {
this.name = name;
}
class Name {
public String firstName;
public String lastName;
}
}
执行上面示例代码,得到以下结果 -
{"rollNo":1,"name":{"firstName":"Max","lastName":"Su"}}
Roll No: 1
First Name: Max
Last Name: Su
{"firstName":"Max","lastName":"Su"}
class Student$Name
First Name: Max
Last Name: Su
嵌套的静态内部类示例
参考以下代码实现 -
Student student = new Student();
student.setRollNo(1);
Student.Name name = new Student.Name();
name.firstName = "Mahesh";
name.lastName = "Kumar";
student.setName(name);
//serialize static inner class object
String nameString = gson.toJson(name);
System.out.println(nameString);
//deserialize static inner class object
name = gson.fromJson(nameString,Student.Name.class);
System.out.println(name.getClass());
示例
我们来看一个实例,其中包含一个静态内部类的序列化/反序列化。 创建一个名为GsonTester
的Java类文件:GsonTester.java -
import com.google.gson.Gson;
public class GsonTester {
public static void main(String args[]) {
Student student = new Student();
student.setRollNo(1);
Student.Name name = new Student.Name();
name.firstName = "Max";
name.lastName = "Su";
student.setName(name);
Gson gson = new Gson();
String jsonString = gson.toJson(student);
System.out.println(jsonString);
student = gson.fromJson(jsonString, Student.class);
System.out.println("Roll No: "+ student.getRollNo());
System.out.println("First Name: "+ student.getName().firstName);
System.out.println("Last Name: "+ student.getName().lastName);
String nameString = gson.toJson(name);
System.out.println(nameString);
name = gson.fromJson(nameString,Student.Name.class);
System.out.println(name.getClass());
System.out.println("First Name: "+ name.firstName);
System.out.println("Last Name: "+ name.lastName);
}
}
class Student {
private int rollNo;
private Name name;
public int getRollNo() {
return rollNo;
}
public void setRollNo(int rollNo) {
this.rollNo = rollNo;
}
public Name getName() {
return name;
}
public void setName(Name name) {
this.name = name;
}
static class Name {
public String firstName;
public String lastName;
}
}
Verify the resul
执行上面示例代码,得到以下输出结果 -
{"rollNo":1,"name":{"firstName":"Max","lastName":"Su"}}
Roll No: 1
First Name: Max
Last Name: Su
{"firstName":"Max","lastName":"Su"}
class Student$Name
First Name: Max
Last Name: Su