简介

mybatis plus是在mybatis基础上做了一些封装，简化了配置，对于简单的sql不再需要写sql语句。

引入

implementation 'org.mybatis.spring.boot:mybatis-spring-boot-starter:1.3.2'
implementation 'com.baomidou:mybatis-plus-boot-starter:3.4.0'

配置

@Configuration
@MapperScan("com.xxx.data.dao")
public class MybatisPlusConfig {
    @Bean
    public OptimisticLockerInterceptor optimisticLockerInterceptor() {
        return new OptimisticLockerInterceptor();
    }
}

定义数据类

@Data
@EqualsAndHashCode(callSuper = true)
public class User extends BaseEntity {
   // ...
    @TableField(insertStrategy = FieldStrategy.NOT_NULL)
    private Date createTime;
    @TableField(insertStrategy = FieldStrategy.NOT_NULL, update = "now()")
    private Date updateTime;
}

定义mapper

public interface UserMapper extends BaseMapper<User> {
}

使用

@Autowired
private UserMapper userMapper;

@Test
public void test(){
    userMapper.selectList(null);
}