mybatis-plus依赖导入
<dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.3.2</version> </dependency>
建议使用3.3.0后的版本。
导入mybatis-plus就不用导入mybatis了,冲突!
连接数据库
spring.datasource.username=rootspring.datasource.password=19981204spring.datasource.url=jdbc:mysql://localhost:3306/mybatis_plus?serverTimezone=Asia/Shanghai&useUnicode=true&characterEncoding=utf-8spring.datasource.driver-class-name=com.mysql.cj.jdbc.Drivermybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl//配置默认日志
设置主键自增
@Data@AllArgsConstructor@NoArgsConstructorpublic class User { @TableId(type = IdType.AUTO) private Long id; private String name; private Integer age; private String email; }
使用注解 @TableId(type=IdType.AUTO),同时将数据库中的id字段设置为自增即可。
编写配置类来进行自动注入时间(继承元数据类并重写它的insertFill和updateFill方法)
使用注解@TableFiled(fill=FieldFill.INSERT)
@Data@AllArgsConstructor@NoArgsConstructorpublic class User { @TableId(type = IdType.AUTO) private Long id; private String name; private Integer age; private String email; @TableField(fill = FieldFill.INSERT) private LocalDateTime createTime; @TableField(fill = FieldFill.INSERT_UPDATE) private LocalDateTime updateTime;}package com.ls.handler; import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler; import org.apache.ibatis.reflection.MetaObject; import org.springframework.stereotype.Component; import java.time.LocalDateTime;/** * @author dell */@Componentpublic class MyMetaObjectHandler implements MetaObjectHandler { @Override public void insertFill(MetaObject metaObject) { this.strictInsertFill(metaObject,"createTime", LocalDateTime.class,LocalDateTime.now()); this.strictUpdateFill(metaObject,"updateTime",LocalDateTime.class,LocalDateTime.now()); } @Override public void updateFill(MetaObject metaObject) { this.strictUpdateFill(metaObject,"updateTime",LocalDateTime.class,LocalDateTime.now()); }}
到此这篇关于Mybatis-plus实现主键自增和自动注入时间的示例代码的文章就介绍到这了,更多相关Mybatis-plus 主键自增和自动注入时间内容请搜索以前的文章或继续浏览下面的相关文章希望大家以后多多支持!