Spring Mvc那点事---(14)Spring Mvc之mybatis调用存储过程

---创建存储过程，In表示输入参数  out表示输出参数
DELIMITER $
CREATE  PROCEDURE  GetSkuCountProc (IN categoryId INT, OUT count_num INT )
BEGIN
SELECT COUNT(0) INTO  count_num  FROM skus s INNER JOIN category  c ON s.categoryid=c.id
WHERE c.Id=categoryId;
END
$

---调用存储过程
DELIMITER ;
SET @count = 0;
CALL GetSkuCountProc(6, @count);
SELECT @count;

<select id="getSkuCount" parameterMap="getSkuCountMap" statementType="CALLABLE">
CALL GetSkuCountProc(?,?)
</select>
<parameterMap type="java.util.Map" id="getSkuCountMap">
<parameter property="categoryId" mode="IN" jdbcType="INTEGER"/>
<parameter property="count_num" mode="OUT" jdbcType="INTEGER"/>
</parameterMap>

@RequestMapping(value="GetSkuCount")
public String GetSkuCount()
{
String resource = "/conf.xml";
//加载mybatis的配置文件
InputStream inputstream =this.getClass().getResourceAsStream(resource);

SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(inputstream);

SqlSession session = sessionFactory.openSession();

String statesql= "mapping.skusMapper.getSkuCount";//在skusMapper.xml中有命名空间+方法名

Map<String, Integer> map = new HashMap<String, Integer>();
map.put("categoryId",6);
map.put("count_num", -1);
session.selectOne(statesql, map);
Integer result = map.get("count_num");
System.out.println(result);
return "index";
}