Gson 序列化NULL值

前言

1.如何在序列化期间允许空值

Gson gson = new GsonBuilder()
        .serializeNulls()
        .create();

2.演示

$title(Employee.java)
public class Employee
{
    private Integer id;
    private String firstName;
    private String lastName;
    private String email;
}

2.1。不要序列化空字段

$title(Main.java)
Employee employeeObj = new Employee(1, "Lokesh", "Gupta", null);
                 
Gson gson = new GsonBuilder()
        .setPrettyPrinting()
        .create();
 
System.out.println(gson.toJson(employeeObj));

{
  "id": 1,
  "firstName": "Lokesh",
  "lastName": "Gupta"
}

2.2。序列化空字段

$title(Main.java)
Employee employeeObj = new Employee(1, "Lokesh", "Gupta", null);
                 
Gson gson = new GsonBuilder()
        .setPrettyPrinting()
        .serializeNulls()
        .create();
 
System.out.println(gson.toJson(employeeObj));

{
  "id": 1,
  "firstName": "Lokesh",
  "lastName": "Gupta",
  "emailId": null
}

GSON NULL Java

https://www.leftso.com/article/651.html