通用mapper

通用mapper类似于mybatis generator的一个数据库查询插件,只不过不需要我们去生成代码

坐标依赖

<!--通用mapper-->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper</artifactId>
            <!-- 建议使用最新版本,最新版本请从项目首页查找 -->
            <version>4.1.4</version>
        </dependency>

启动类注解，注意此处的包是tk,通用mapper的包

import tk.mybatis.spring.annotation.MapperScan;

@MapperScan(value = "com.hanfu.cancel.dao")

dao层，同样是使用通用mapper的包

import tk.mybatis.mapper.common.Mapper;
public interface HfUserMapper extends Mapper<HfUser> {
}

实体

@Data
public class CancelRecord {
    @KeySql(useGeneratedKeys = true)
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Id
    private Integer id;
    private LocalDateTime createDate;
    private LocalDateTime modifyDate;
    private Integer cancelId;
    private Integer goodsId;
    private Integer amount;
    private Integer orderId;
}

基本的调用方法和generator的Example类差不多

cancelsMapper.selectByPrimaryKey(i)