Mybatis调用MySQL存储过程

4.2 调用存储过程

call sp_name()

注意：存储过程名称后面必须加括号，哪怕该存储过程没有参数传递

4.3 删除存储过程

drop procedure sp_name//

注意：不能在一个存储过程中删除另一个存储过程，只能调用另一个存储过程

4.4其他常用命令

show procedure status

显示数据库中所有存储的存储过程基本信息，包括所属数据库，存储过程名称，创建时间等

show create procedure sp_name

显示某一个MySQL存储过程的详细信息

5.MyBatis调用MySQL存储过程的案例实现

5.1案例的简单描述

案例主要以一个简单的统计某种名称设备的总数来实现。

5.2 数据库表的创建

DROP TABLE IF EXISTS `cus_device`;
CREATE TABLE `cus_device` (
  `device_sn` varchar(20) NOT NULL COMMENT ‘设备编号‘,
  `device_cat_id` int(1) DEFAULT NULL COMMENT ‘设备类型‘,
  `device_name` varchar(64) DEFAULT NULL COMMENT ‘设备名称‘,
  `device_type` varchar(64) DEFAULT NULL COMMENT ‘设备型号‘,
  PRIMARY KEY (`device_sn`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

5.3 创建存储过程

以设备的名称为输入参数，以统计到设备的总数为输出参数

DROP PROCEDURE IF EXISTS `countDevicesName`;
DELIMITER ;;
CREATE  PROCEDURE `countDevicesName`(IN dName VARCHAR(12),OUT deviceCount INT)
BEGIN
SELECT COUNT(*) INTO deviceCount  FROM cus_device WHERE device_name = dName;

END
;;
DELIMITER ;

5.4 Mybatis调用MySQL存储过程

1. mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE configuration PUBLIC   
    "-//mybatis.org//DTD Config 3.0//EN"  
    "http://mybatis.org/dtd/mybatis-3-config.dtd">  
<configuration>  

    <settings>
    <!-- 打印查询语句 -->
        <setting name="logImpl" value="STDOUT_LOGGING" />
    </settings>
    <!-- 配置别名 -->  
    <typeAliases>  
        <typeAlias type="com.lidong.axis2demo.DevicePOJO" alias="DevicePOJO" />   
    </typeAliases>  

    <!-- 配置环境变量 -->  
    <environments default="development">  
        <environment id="development">  
            <transactionManager type="JDBC" />  
            <dataSource type="POOLED">  
                <property name="driver" value="com.mysql.jdbc.Driver" />  
                <property name="url" value="jdbc:mysql://127.0.0.1:3306/bms?characterEncoding=GBK" />  
                <property name="username" value="root" />  
                <property name="password" value="123456" />  
            </dataSource>  
        </environment>  
    </environments>  

    <!-- 配置mappers -->  
    <mappers>  
        <mapper resource="com/lidong/axis2demo/DeviceMapper.xml" />  
    </mappers>  

</configuration>

2. CusDevice.java

public class DevicePOJO{

     private String devoceName;//设备名称
     private String deviceCount;//设备总数


    public String getDevoceName() {
        return devoceName;
    }
    public void setDevoceName(String devoceName) {
        this.devoceName = devoceName;
    }
    public String getDeviceCount() {
        return deviceCount;
    }
    public void setDeviceCount(String deviceCount) {
        this.deviceCount = deviceCount;
    }
}

3. DeviceDAO的实现

package com.lidong.axis2demo;

public interface DeviceDAO {

    /**
     * 调用存储过程 获取设备的总数
     * @param devicePOJO
     */
    public void count(DevicePOJO devicePOJO);

}

4.Mapper的实现

<?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.lidong.axis2demo.DeviceDAO">

    <resultMap id="BaseResultMap" type="CusDevicePOJO">
        <result column="device_sn" property="device_sn" jdbcType="VARCHAR" />
    </resultMap>

    <sql id="Base_Column_List">
        device_sn, device_name,device_mac
    </sql>

    <select id="count" parameterType="DevicePOJO" useCache="false"
        statementType="CALLABLE">  
        <![CDATA[ 
        call countDevicesName(
        #{devoceName,mode=IN,jdbcType=VARCHAR},
        #{deviceCount,mode=OUT,jdbcType=INTEGER});
        ]]>
    </select>
</mapper>  

注意：statementType=”CALLABLE” 必须为CALLABLE，告诉MyBatis去执行存储过程， 否则会报错
Exception in thread “main” org.apache.ibatis.exceptions.PersistenceException

mode=IN 输入参数 mode=OUT输出参数 jdbcType为数据库定义的字段类型。
这样写 Mybatis会帮助我们自动回填输出的deviceCount的值。

5.测试

package com.lidong.axis2demo;

import java.io.IOException;
import java.io.Reader;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
/**
 * MyBatis 执行存储过程
 * @author Administrator
 *
 */
public class TestProduce {

    private static SqlSessionFactoryBuilder sqlSessionFactoryBuilder;  
    private static SqlSessionFactory sqlSessionFactory;  
    private static void init() throws IOException {  
        String resource = "mybatis-config.xml";  
        Reader reader = Resources.getResourceAsReader(resource);  
        sqlSessionFactoryBuilder = new SqlSessionFactoryBuilder();  
        sqlSessionFactory = sqlSessionFactoryBuilder.build(reader);  
    }  

    public static void main(String[] args) throws Exception {
        testCallProduce();
    }

    /**
     * @throws IOException
     */
    private static void testCallProduce() throws IOException {
        init();
        SqlSession session= sqlSessionFactory.openSession();  
        DeviceDAO deviceDAO = session.getMapper(DeviceDAO.class);  
        DevicePOJO device = new DevicePOJO();  
        device.setDevoceName("设备名称");  
        deviceDAO.count(device);
        System.out.println("获取"+device.getDevoceName()+"设备的总数="+device.getDeviceCount());
    }

}

结果

Mybatis调用MySQL存储过程

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