Mybatis调用MySQL存储过程的简单实现

   

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" 
  "https://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 > 
      <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" "https://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.lidong.axis2demo.DeviceDAO">
 
  <resultMap  type="CusDevicePOJO">
    <result column="device_sn" property="device_sn" jdbcType="VARCHAR" />
  </resultMap>
 
  <sql >
    device_sn, device_name,device_mac
  </sql>
 
  <select  parameterType="DevicePOJO" useCache="false"
    statementType="CALLABLE"> 
  
  </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

 

原文链接：https://blog.csdn.net/u010046908/article/details/69944959