MyBatis-Plus自动填充

 数据库持久层配置类DataBaseConfiguration.java：

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * 数据库持久层配置类
 */
@Configuration(value = "dataBaseConfigurationByAdmin")
public class DataBaseConfiguration {

    /**
     * 分页插件
     */
    @Bean
    @ConditionalOnMissingBean
    public MybatisPlusInterceptor mybatisPlusInterceptorByAdmin() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        return interceptor;
    }
}

填充规则MyMetaObjectHandler.java：

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.context.annotation.Primary;
import org.springframework.stereotype.Component;

import java.util.Date;


@Primary
@Component(value = "myMetaObjectHandlerByAdmin")
@Slf4j
public class MyMetaObjectHandler implements MetaObjectHandler {
    @Override
    public void insertFill(MetaObject metaObject) {
        log.info("开始插入填充...");
        this.strictInsertFill(metaObject, "createTime", Date::new,Date.class);
        this.strictInsertFill(metaObject, "updateTime", Date::new,Date.class);
        this.strictInsertFill(metaObject, "delFlag", ()->0, Integer.class);
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        log.info("开始更新填充...");
        this.strictUpdateFill(metaObject, "updateTime", Date::new,Date.class);
    }
}

使用：

使用注解指定实体类中的某个字段在插入数据时需要进行自动填充。

@Data
public class BaseDO {
    /**
     * 创建时间
     */
    @TableField(fill = FieldFill.INSERT)
    private Date createTime;

    /**
     * 修改时间
     */
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Date updateTime;

    /**
     * 删除标识 0：未删除 1：已删除
     */
    @TableField(fill = FieldFill.INSERT)
    private Integer delFlag;

}