mybatis 实体字段自动填充

mybatis 自动添加字段避坑

① 注入数据类型要和实体数据类型一致

/**
 * 自定义元对象处理器
 * 公共字段自动填充
 */
@Component
@Slf4j
public class MyMetaObjectHandler implements MetaObjectHandler {
    @Override
    public void insertFill(MetaObject metaObject) {
        log.info("公共字段自动填充[insert]...");
        log.info(metaObject.toString());
        this.setFieldValByName("createTime", LocalDateTime.now(), metaObject);
        this.setFieldValByName("updateTime", LocalDateTime.now(), metaObject);
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        metaObject.setValue("updateTime", LocalDateTime.now());
    }
}

@TableName(value = "consumer")
@Data
public class Consumer {
    @TableField(fill = FieldFill.INSERT)
    private LocalDateTime createTime;

    @TableField(fill = FieldFill.INSERT_UPDATE)
    private LocalDateTime updateTime;

}

② 如果自己用的是mybatis,一定要继承myabtis-plus的BaseMapper接口，否则注入不生效。

@Mapper
public interface ConsumerMapper extends BaseMapper<Consumer> {
    Consumer login(@Param("username") String name, @Param("password") String pwd);
    void signUp(Consumer consumer);
    int selectByName(String name);
}