调用存储过程

调用存储过程

创建表

CREATE TABLE `p_user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(10) DEFAULT NULL,
`sex` char(2) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=latin1;
insert into p_user(name,sex) values('A',"Ma");  
insert into p_user(name,sex) values('B',"Fe");  
insert into p_user(name,sex) values('C',"Ma");  
insert into p_user(name,sex) values('D',"Ma");
insert into p_user(name,sex) values('E',"Ma");
insert into p_user(name,sex) values('F',"Fe");

创建存储过程,并调用

$
BEGIN 
IF sex_id=0 THEN
SELECT COUNT(*) FROM mybatis.p_user WHERE p_user.sex='Fe' INTO user_count;
ELSE
SELECT COUNT(*) FROM mybatis.p_user WHERE p_user.sex='Ma' INTO user_count;
END IF;
END
$

mysql> SET @user_count = 0;
CALL mybatis.ges_user_count(1, @user_count);
SELECT @user_count;

Query OK, 0 rows affected
Query OK, 1 row affected
+-------------+
| @user_count |
+-------------+
|           4 |
+-------------+
1 row in set

使用mybatis来实现此功能

配置mapper

<?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.bart.mybatis.mapper.procedureMapper">
<!-- 
 存储过程查询
 parameterMap:传入的参数是一个Map
 statementType：CALLABLE调用存储过程查询
 -->   

<select id="getUserCount" parameterMap="getUserCountMap" statementType="CALLABLE">
        CALL mybatis.ges_user_count(?,?)
</select>     
<!-- 
 输入参数对应的map
 map.put("sexid", 0);
 map.put("userCount", -1);//任意给定默认值
 -->
<parameterMap type="java.util.Map" id="getUserCountMap">
<parameter property="sexid" mode="IN" jdbcType="INTEGER"/>
<parameter property="userCount" mode="OUT" jdbcType="INTEGER"/>
</parameterMap>
</mapper>

配置conf

把mapper加入进来

 <mapper resource="com/bart/mybatis/mapper/procedureMapper.xml"/>

测试

@Test
public void getUserCount(){
        SqlSessionFactory sessionFactory = DBUtil.getSessionFactory();
        SqlSession session = sessionFactory.openSession();
// 创建存储参数的Map
        Map<String, Integer>map = new HashMap<String, Integer>();
        map.put("sexid", 1);
        map.put("userCount", -1);//任意给定默认值

        String statement ="com.bart.mybatis.mapper.procedureMapper.getUserCount";
        session.selectOne(statement, map);
//获得存储过程执行完后的userCount的值
        Integer count = map.get("userCount");
        System.out.println("查询到的值："+count);
        session.close();

    }

结果：

查询到的值：4

mybatis调用存储过程成功

总结

1. 传入的是一个Map，查询返回的是Integer，作为调用存储过程函数
   
   • 存储过程查询
   • parameterMap:传入的参数是一个Map
   • statementType：CALLABLE调用存储过程查询
2. 配置parameterMap

 输入参数对应应该map里面的值
map.put("sexid", 0);
map.put("userCount", -1);//任意给定默认值

• type:java.util.Map
• property:对应的map中key值
• mode:IN/OUT表示是作为输入参数还是输出参数

• jdbcType:数据库对应的类型