Mysql查詢表中的字段屬性&通用mapper

查詢表中的字段屬性

show full columns from tablename;

強大的IDEA：加入工具類通用mapper 將單表的增刪改查省去，通過通用mapper來簡化。

1.通過在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.然後配置mapper繼承通用mapper 還需要寫泛型

import tk.mybatis.mapper.common.Mapper;

public interface UmsMemberReceiveAddressMapper extends Mapper<UmsMemberReceiveAddress> {
}

3.配值實體類中的主鍵和返回策略 @Id @GeneratedValue(strategy = GenerationType.IDENTITY)
4.配置啓動類掃描mapperScan使用也就是在spring boot的啓動類中配置MapperScan爲import tk.mybatis.spring.annotation.MapperScan;