1. Java bean
Java bean 满足一些规范的Java类
It is a regular Java class, except it follows certain conventions:
All properties are private (use getters/setters)：属性私有
A public no-argument constructor：无参构造
Implements Serializable：实现Serializable接口
例
public class Employee implements Serializable{
@Id
private int id;
private String name;
private int salary;
public Employee() {}
public Employee(String name, int salary) {
this.name = name;
this.salary = salary;
}
public int getId() {
return id;
}
public void setId( int id ) {
this.id = id;
}
public String getName() {
return name;
}
public void setName( String name ) {
this.name = name;
}
public int getSalary() {
return salary;
}
public void setSalary( int salary ) {
this.salary = salary;
}
}
2. serialVersionUID
@Data
public class BaseEntity implements Serializable {
private static final long serialVersionUID = 1L;
@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
@Schema(description = "创建时间")
private LocalDateTime createTime;
@Schema(description = "创建人")
private String createBy;
@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
@Schema(description = "修改时间")
private LocalDateTime updateTime;
@Schema(description = "修改人")
private String updateBy;
@Schema(description = "备注")
private String remark;
@Schema(description = "删除标志")
private String delFlag;
}
serialVersionUID = 1L 的作用
序列化和反序列化必须保证serialVersionUID的一致性
在类中显式声明serialVersionUID = 1L 后，在序列化后，反序列化前，更改了类的属性或者方法，只要显式的指定了serialVersionUID的值， 那么在反序列化的过程中不会报错，只是反序列化出来的类中，我们反序列化前添加的属性值读取不到
3. 其他称呼
Java Bean、bean、pojo、实体类
