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();
}