Mybatis-plus配置之日期时间自动填充实践

 <!-- 内置mybatis-plus插件依赖 -->
    <dependency>
       <groupId>com.baomidou</groupId>
       <artifactId>mybatis-plus-boot-starter</artifactId>
       <version>3.4.2</version>
     </dependency>
     <!-- MySql -->
      <dependency>
         <groupId>mysql</groupId>
         <artifactId>mysql-connector-java</artifactId>
         <version>8.0.11</version>
       </dependency>

public abstract class BasePojo {
    //文件创建，自动填充。需要实现MetaObjectHandle接口,进行处理
    @TableField(fill = FieldFill.INSERT)
    private Date created;
    //文件更新，自动填充
    @TableField(fill = FieldFill.INSERT_UPDATE)
    private Date updated;
}

package com.tanhua.sso.handler;

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class MyMetaObjectHandler implements MetaObjectHandler {

    @Override
    public void insertFill(MetaObject metaObject) {
        // 使用严格模式插入填充，如果字段为null则进行填充
        this.strictInsertFill(metaObject, "created", Date.class, new Date()); // 创建时间
        this.strictInsertFill(metaObject, "updated", Date.class, new Date()); // 更新时间
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        // 使用严格模式更新填充，总是设置更新时间
        this.strictUpdateFill(metaObject, "updated", Date.class, new Date());
    }
}

package com.tanhua.sso.handler;

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;

import java.util.Date;

@Component
public class MyMetaObjectHandler implements MetaObjectHandler {
    @Override
    public void insertFill(MetaObject metaObject) {
        //字段为空,自动填充字段
        Object created = getFieldValByName("created", metaObject);
        if(null==created){
            setFieldValByName("created",new Date(),metaObject);
        }
        Object updated = getFieldValByName("updated", metaObject);
        if(null==updated){
            setFieldValByName("updated",new Date(),metaObject);
        }
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        //更新数据时，更新字段
        setFieldValByName("updated",new Date(),metaObject);
    }
}