查询表中的字段属性
show full columns from tablename;
强大的IDEA:加入工具类通用mapper 将单表的增删改查省去,通过通用mapper来简化。
1.通过在pom.xml中配置通用mapper
<dependency>
<groupId>tk.mybatis</groupId>
<artifactId>mapper-spring-boot-starter</artifactId>
<version>1.2.3</version>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</exclusion>
</exclusions>
</dependency>
2.然后配置mapper继承通用mapper 还需要写泛型
import tk.mybatis.mapper.common.Mapper;
public interface UmsMemberReceiveAddressMapper extends Mapper<UmsMemberReceiveAddress> {
}
3.配值实体类中的主键和返回策略 @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
4.配置启动类扫描mapperScan使用也就是在spring boot的启动类中配置MapperScan为import tk.mybatis.spring.annotation.MapperScan;