第一步、entity实体类模版

参考：
private static final long serialVersionUID = 1L

package com.tj.demo.system.domain;
import com.baomidou.mybatisplus.annotation.*;
import com.fasterxml.jackson.annotation.JsonProperty;
import lombok.Data;
import java.io.Serializable;
import java.time.LocalDateTime;
import java.util.Set;
/**
 * 用户表字段
 */
@Data
@TableName("users")
public class Users implements Serializable {
    private Long id;
    private String user_accout;
    private String user_name;
    private String initkey;
    private Long regionid;
    private String address;
    private String phone;
    private String email;
    private String weixin;
    private String qq;
    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)//不可读
    private String password;
    @OrderBy(asc = true)
    private Integer sortnum;
    private Integer isuse;
    @TableLogic
    @TableField(select = false)
    private Integer isdelete;
    private String remark;
    private String avatar;
    @JsonProperty(access = JsonProperty.Access.READ_ONLY) //只读
    private LocalDateTime timeadd;
    @JsonProperty(access = JsonProperty.Access.READ_ONLY)//只读
    private LocalDateTime timein;
    @JsonProperty(access = JsonProperty.Access.READ_ONLY)//只读
    private String ipin;
    /**
     * 数据库不存在的字段
     */
    //序列化ID
    @TableField(exist = false)
    private static final long serialVersionUID = 1L;
    //地区名称组合
    @TableField(exist = false)
    private String regionMername;
    //角色set数组
    @TableField(exist = false)
    private Set<Long> roleIds;
    @TableField(exist = false)
    private Set<String> roleNames;
    //部门set数组
    @TableField(exist = false)
    private Set<Long> deptIds;
    @TableField(exist = false)
    private Set<String> deptNames;
    //页码
    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)//不可读
    @TableField(exist = false)
    private Integer pagenum;
    @JsonProperty(access = JsonProperty.Access.WRITE_ONLY)//不可读
    @TableField(exist = false)
    private Integer pagesize;
}