MetaObjectHandler 自动填充

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最新推荐文章于 2024-06-11 15:57:18 发布

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分类专栏： java 文章标签： java mybatis 后端 spring boot

本文链接：https://blog.youkuaiyun.com/qq_27480059/article/details/117537525

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需要一个mybatis配置类

@Configuration
public class MybatisConfig {
    @Bean
    public MetaObjectHandler metaObjectHandler() {
        return new MetaObjectHandler() {
            @Override
            public void insertFill(MetaObject metaObject) {
                long current = System.currentTimeMillis();
                this.setFieldValByName("createTime", current, metaObject);
                this.setFieldValByName("updateTime", current, metaObject);
            }

            @Override
            public void updateFill(MetaObject metaObject) {
                this.setFieldValByName("updateTime", System.currentTimeMillis(), metaObject);
            }
        };
    }
}

然后实体类

@TableField(value = "create_time", fill = FieldFill.INSERT)
private Long createTime;

@TableField(value = "update_time", fill = FieldFill.INSERT_UPDATE)
private Long updateTime;

最后启动类记得加上@ComponentScan(“com.example.learning”)注解

@EnableDiscoveryClient
@SpringBootApplication
@ComponentScan("com.example.learning")
@MapperScan("com.example.learning.user.mapper")
public class LearningUserApplication {

    public static void main(String[] args) {
        SpringApplication.run(LearningUserApplication.class, args);
    }
}