SpringBoot 使用MyBatisPlus

引入依赖

<dependency>
    <groupId>com.github.xiaoymin</groupId>
    <artifactId>knife4j-openapi3-jakarta-spring-boot-starter</artifactId>
    <version>4.3.0</version>
</dependency>

写一个interface 继承basemap

@Mapper
public interface UserDao extends BaseMapper<User> {
   
}

user类

package com.example.demo.dao;



@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
@TableName("app_user")
public class User {
    @TableId
    int id;
    String username;
    @TableField(exist = false)
    transient String password;

}

这就结束了，测试

@Test
    public void t() {
        System.out.println(userDao.selectById(11));
    }

2025-07-17T21:51:35.389+08:00  INFO 12168 --- [demo] [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2025-07-17T21:51:35.713+08:00  INFO 12168 --- [demo] [           main] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Added connection com.mysql.cj.jdbc.ConnectionImpl@4727e5fc
2025-07-17T21:51:35.717+08:00  INFO 12168 --- [demo] [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
User(id=11, username=test, password=null)
2025-07-17T21:51:35.838+08:00  INFO 12168 --- [demo] [ionShutdownHook] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
2025-07-17T21:51:35.852+08:00  INFO 12168 --- [demo] [ionShutdownHook] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.

Process finished w

成功！