Mybatis-Plus中字段自动填充

SpringBoot 中配置字段填充

1. 依赖

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>${mybatis-plus.version}</version>
</dependency>

2. 实体类添加注解

@TableField(fill = FieldFill.INSERT) //插入时填充字段
private Date createTime;
@TableField(fill = FieldFill.INSERT_UPDATE)//插入和修改时填充字段
private Date updateTime;

3. 填充规则

@Slf4j
@Component
public class MyMetaObjectHandler implements MetaObjectHandler {

    //插入时的填充策略
    @Override
    public void insertFill(MetaObject metaObject) {
        log.info("start insert fill ....");
        //三个参数：字段名，字段值，元对象参数
        this.setFieldValByName("createTime",new Date(),metaObject);
        this.setFieldValByName("updateTime",new Date(),metaObject);
    }
    //修改时的填充策略
    @Override
    public void updateFill(MetaObject metaObject) {
        log.info("start update fill ....");
        this.setFieldValByName("updateTime",new Date(),metaObject);
    }
}