MybatisPlus 插入或更新数据时自动填充更新数据解决方案

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.6.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>
 
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.1.0</version>
</dependency>

/**
 * 基础Bean
 */
@Data
public class BaseEntity implements Serializable {
 
    @TableField(value = "create_user", fill = FieldFill.INSERT) // 新增执行
    private String createUser;
 
    @TableField(value = "create_time", fill = FieldFill.INSERT)
    private LocalDateTime createTime;
 
    @TableField(value = "update_user", fill = FieldFill.INSERT_UPDATE) // 新增和更新执行
    private String updateUser;
 
    @TableField(value = "update_time", fill = FieldFill.INSERT_UPDATE)
    private LocalDateTime updateTime;
 
    @TableField(value = "remark")
    private String remark;
 
}

@Data
@TableName("sys_dept")
public class SysDeptEntity extends BaseEntity {
 
    private static final long serialVersionUID = 1L;
 
    /**
     * 部门ID
     **/
    @TableId
    private Long deptId;
 
    /**
     * 部门父节点ID
     **/
    private Long parentId;
 
    /**
     * 部门名称
     **/
    private String deptName;
 
    /**
     * 显示顺序
     **/
    private Integer orderNum;
 
    /**
     * 用户状态（0：正常 1：禁用）
     **/
    private Integer status;
 
    @TableField(exist = false)
    private List<SysDeptEntity> children;
 
}

/**
 * @author ShenTuZhiGang
 * @version 1.0.0
 * @date 2020-11-26 15:52
 */
@Slf4j
@Component
public class CustomMetaObjectHandler implements MetaObjectHandler {
    @Autowired
    private AuthenticationTrustResolver authenticationTrustResolver;
    @Override
    public void insertFill(MetaObject metaObject) {
        log.info("come to insert fill .........");
        this.setFieldValByName("createTime", LocalDateTime.now(), metaObject);
        this.setFieldValByName("updateTime", LocalDateTime.now(), metaObject);
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if(!authenticationTrustResolver.isAnonymous(authentication) && authentication!=null){
            AuthenticationUser user = (AuthenticationUser) authentication.getPrincipal();
            this.setFieldValByName("createUser", user.getUsername(), metaObject);
            this.setFieldValByName("updateUser",  user.getUsername(), metaObject);
        }else{
            this.setFieldValByName("createUser", "unknown", metaObject);
            this.setFieldValByName("updateUser",  "unknown", metaObject);
        }
 
    }
 
    @Override
    public void updateFill(MetaObject metaObject) {
        log.info("come to update fill .........");
        this.setFieldValByName("update_time", LocalDateTime.now(), metaObject);
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        if(!authenticationTrustResolver.isAnonymous(authentication) && authentication!=null){
            AuthenticationUser user = (AuthenticationUser) authentication.getPrincipal();
            this.setFieldValByName("updateUser",  user.getUsername(), metaObject);
        }else{
            this.setFieldValByName("updateUser",  "unknown", metaObject);
        }
    }
}

@Configuration
public class MyBatisPlusConfig {
 
    /**
     * 自动填充功能
     * @return
     */
    @Bean
    public GlobalConfig globalConfig() {
        GlobalConfig globalConfig = new GlobalConfig();
        globalConfig.setMetaObjectHandler(new MetaHandler());
        return globalConfig;
    }
 
}

@RequiresPermissions("sys:dept:add")
@PostMapping("/add")
@ResponseBody
public R add(@RequestBody SysDeptEntity deptEntity) {
    logger.info("添加信息={}", deptEntity);
    sysDeptService.save(deptEntity); // 不再需要设置setCreateUser、setCreateTime、setUpdateUser、setUpdateTime操作，代码更优美
    return R.ok();
}