In addition to Weibo, there is also WeChat
Please pay attention
WeChat public account
Shulou
2025-03-16 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >
Share
Shulou(Shulou.com)06/02 Report--
Editor to share with you how Mybatis-Plus automatically fill in the update operation related fields, I believe that most people do not understand, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!
Scene introduction
In the data table design of the project, each table has four fields: create_id, create_time, update_id and update_time. In the Java application, these four fields should be changed accordingly for new and modified operations:
Create_id and update_id are to be automatically populated as the currently logged-in user ID
Create_time and update_time should be automatically populated as the current time.
Let's talk about the code implementation:
Auto-populate processor
Need to implement the MetaObjectHandler interface in Mybatis-Plus
Import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;import hw.topevery.basis.runtime.UserRuntime;import org.apache.ibatis.reflection.MetaObject;import org.springframework.stereotype.Component;import java.time.LocalDateTime;import java.util.Objects / * Update related field processor * * @ author whw * @ date 16:41 on 2020-1-3 * / @ Componentpublic class UpdateRelatedFieldsMetaHandler implements MetaObjectHandler {/ * add operation * * @ param metaObject * / @ Override public void insertFill (MetaObject metaObject) {this.strictInsertFill (metaObject, "createId", String.class, getCurrentUserId ()) This.strictInsertFill (metaObject, createTime, LocalDateTime.class, LocalDateTime.now ()); this.strictInsertFill (metaObject, "updateId", String.class, getCurrentUserId ()); this.strictInsertFill (metaObject, "updateTime", LocalDateTime.class, LocalDateTime.now ()) } / * update operation * * @ param metaObject * / @ Override public void updateFill (MetaObject metaObject) {this.strictUpdateFill (metaObject, "updateId", String.class, getCurrentUserId (); this.strictUpdateFill (metaObject, "updateTime", LocalDateTime.class, LocalDateTime.now ()) } / * get the current login user ID * * @ return * / private String getCurrentUserId () {return "current login user ID";}} Mybatis-Plus configuration class
The processor needs to be injected into the Spring container to take effect.
Import com.baomidou.mybatisplus.core.config.GlobalConfig;import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;import hw.topevery.kunming.wapi.handler.UpdateRelatedFieldsMetaHandler;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;/** * Mybatis-Plus configuration class * * @ author whw * @ date, 2020-1-3 16:41 * / @ Configurationpublic class MybatisPlusConfig {@ Bean public GlobalConfig globalConfig () {GlobalConfig globalConfig = new GlobalConfig () GlobalConfig.setMetaObjectHandler (new UpdateRelatedFieldsMetaHandler ()); return globalConfig;}} configure the automatic filling policy for related fields in the entity class
Set the fill property in the @ TableField annotation
Field filling Policy FieldFill description
Value description DEFAULT does not handle INSERT insert fill fields UPDATE update fill fields INSERT_UPDATE insert and update fill fields import com.baomidou.mybatisplus.annotation.FieldFill;import com.baomidou.mybatisplus.annotation.TableField;import io.swagger.annotations.ApiModelProperty;import lombok.Data;import java.io.Serializable;import java.time.LocalDateTime by default / * basic entity class * * @ author whw * @ date 2020-1-3 17:37 * / @ Datapublic class BaseEntity implements Serializable {private static final long serialVersionUID = 1L; @ ApiModelProperty (value = "create user ID") @ TableField (value = "c_create_id", fill = FieldFill.INSERT) private String createId @ ApiModelProperty (value = "creation time") @ TableField (value = "c_create_time", fill = FieldFill.INSERT) private LocalDateTime createTime; @ ApiModelProperty (value = "update user ID") @ TableField (value = "c_update_id", fill = FieldFill.INSERT_UPDATE) private String updateId; @ ApiModelProperty (value = "update time") @ TableField (value = "c_update_time", fill = FieldFill.INSERT_UPDATE) private LocalDateTime updateTime } the above is all the content of the article "how to automatically fill in the fields related to update operation by Mybatis-Plus". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!
Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.
Views: 0
*The comments in the above article only represent the author's personal views and do not represent the views and positions of this website. If you have more insights, please feel free to contribute and share.
Continue with the installation of the previous hadoop.First, install zookooper1. Decompress zookoope
"Every 5-10 years, there's a rare product, a really special, very unusual product that's the most un
© 2024 shulou.com SLNews company. All rights reserved.