关于 POJO

POJO 是什么

POJO是指一个简单的Java对象，没有任何框架特定的约定或者特殊的父类，只是简单的Java Bean，通常是一个无状态的、可序列化的、可复制的简单Java类。

POJO 示例

public class Employee {
    private String firstName;
    private String lastName;
    private int age;
    private double salary;

    public Employee() {}

    public Employee(String firstName, String lastName, int age, double salary) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.age = age;
        this.salary = salary;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public double getSalary() {
        return salary;
    }

    public void setSalary(double salary) {
        this.salary = salary;
    }
}