MyBatis传入多个参数,通过多个变量接收多个参数(Springboot+mybatis Plus+mysql)
MyBatis传入多个参数,通过多个变量接收多个参数
1.目录结构如图
2.service层的编写
public interface NiotCollectorService extends IService<NiotCollectorEntity> {
NiotCollectorEntity findByCollectorNumAndItemType(String collectorNum, String itemType);
}
serviceImpl
@Service
public class NiotCollectorServiceimpl extends ServiceImpl<NiotCollectorDao, NiotCollectorEntity> implements NiotCollectorService {
@Autowired
private NiotCollectorDao niotCollectorDao;
@Override
public NiotCollectorEntity findByCollectorNumAndItemType(String collectorNum, String itemType) {
NiotCollectorEntity collectorEntity = niotCollectorDao.findByCollectorNumAndItemType(collectorNum,itemType);
return collectorEntity;
}
}
3.Dao层的编写
@Mapper
public interface NiotCollectorDao extends BaseMapper<NiotCollectorEntity> {
NiotCollectorEntity findByCollectorNumAndItemType(String collectorNum, String itemType);
}
4.XML文件的编写
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.northmeter.app.niotcollector.dao.NiotCollectorDao">
<select id="findByCollectorNumAndItemType" parameterType="String"
resultType="com.northmeter.app.niotcollector.entity.NiotCollectorEntity">
select * from niot_collector where collector_num = #{arg0} and item_type = #{arg1}
</select>
</mapper>