5.MyBaits调用存储过程

1.创建一个javaweb项目MyBatis_Part4_Procedure

2.在src下创建procedure.sql文件

 --创建表
 create table p_user(
     id number primary key,
     name varchar2(20),
     sex varchar2(2)
 ); 

 create sequence seq_puser;

 insert into p_user values(seq_puser.nextval,'A','男');
 insert into p_user values(seq_puser.nextval,'B','女');
 insert into p_user values(seq_puser.nextval,'C','男');  

 commit;

 --统计男女的数量
 CREATE or replace PROCEDURE holly.get_user_count(sex_id IN number,user_count OUT number)
 is
 BEGIN
 IF sex_id=0 THEN
  SELECT COUNT(*) INTO user_count FROM p_user WHERE p_user.sex='女';
 ELSE
   SELECT COUNT(*) INTO user_count FROM p_user WHERE p_user.sex='男' ;
 END IF;
 END ;
 /

procedure.sql

3.在src下创建jdbc.properties属性文件

 driver=oracle.jdbc.driver.OracleDriver
 url=jdbc\:oracle\:thin\:@127.0.0.1\:1521\:orcl
 username=holly
 password=sys

jdbc.properties

4.在src下创建configuration.xml配置文件

 <?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>

   <!-- 1.引用jdbc链接数据库的属性文件 -->
   <properties resource="jdbc.properties"/>

   <!-- 2.类路径的别名 --><!--
   <typeAliases>
     <typeAlias type="com.entity.Classes" alias="Classes"/>
     <typeAlias type="com.entity.Teacher" alias="Teacher"/>
     <typeAlias type="com.entity.Student" alias="Student"/>
   </typeAliases>

   --><!-- 3.事务和数据源的配置 -->
   <environments default="development">
     <environment id="development">
       <transactionManager type="jdbc"/>
       <dataSource type="POOLED">
         <property name="driver" value="${driver}"/>
         <property name="url" value="${url}"/>
         <property name="username" value="${username}"/>
         <property name="password" value="${password}"/>
       </dataSource>
     </environment>
   </environments>
   <!-- 4.注册映射文件 -->
   <mappers>
   <!-- 有映射文件时resource属性=映射文件的路径 -->
   <!-- 使用注解没有映射文件时class属性=映射文件的路径 -->
   <mapper resource="com/mapper/PUserMapper.xml"/>

   </mappers>

 </configuration>

configuration.xml

5.在src下com.entity创建PUser.java

 package com.entity;

 public class PUser {
     private int id;
     private String name;
     private String sex;

     public PUser() {
     }
     public PUser(int id, String name, String sex) {
         this.id = id;
         this.name = name;
         this.sex = sex;
     }
     public int getId() {
         return id;
     }
     public void setId(int id) {
         this.id = id;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getSex() {
         return sex;
     }
     public void setSex(String sex) {
         this.sex = sex;
     }
     @Override
     public String toString() {
         return "PUser [id=" + id + ", name=" + name + ", sex=" + sex + "]";
     }

 }

PUser.java

6.在src下com.util包下创建MyBaitsUtil.java

 package com.util;

 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;

 public class MyBaitsUtil {
     private static SqlSessionFactory sqlSessionFactory;

     static{
         try {
             Reader reader=Resources.getResourceAsReader("configuration.xml");
             sqlSessionFactory=new SqlSessionFactoryBuilder().build(reader);
         } catch (IOException e) {
             e.printStackTrace();
         }

     }
     /**
      *
      * @param isCommit true表示执行完操作提交事务，false表示执行完不自动提交事务
      * @return
      */
     public static SqlSession getSqlSession(boolean isCommit){
         return sqlSessionFactory.openSession(isCommit);
     }

 }

MyBaitsUtil.java

7.在src下com.mapper包下创建PUserMapper.java

 package com.mapper;

 import java.util.Map;

 public interface PUserMapper {
     /**
      * 统计某个性别的数据
      * @param paramMap
      * @return
      */
     int getCountBySex(Map<String, Integer> paramMap);

 }

PUserMapper.java

8.在src下com.mapper包下创建PUserMapper.xml

 <?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.mapper.PUserMapper">
    <!--parameterMap表示参数是一个集合，
    statementType="CALLABLE" 表示该节点下写的是调用存储过程的语句 -->
    <select id="getCountBySex" parameterMap="paramMap"
      statementType="CALLABLE">
       CALL holly.get_user_count(?,?)
    </select>
    <!-- 配置参数集合 -->
    <parameterMap id="paramMap" type="java.util.Map" >
      <!-- 配置集合的输入参数 -->
     <parameter property="sexid" mode="IN" jdbcType="INTEGER"/>
     <!-- 配置集合的输出参数 -->
     <parameter property="usercount" mode="OUT" jdbcType="INTEGER"/>
    </parameterMap>

 </mapper>

PUserMapper.xml

9.在src下com.mapper.impl包下创建PUserMapperImpl.java

 package com.mapper.impl;

 import java.util.Map;

 import org.apache.ibatis.session.SqlSession;

 import com.mapper.PUserMapper;
 import com.util.MyBaitsUtil;

 public class PUserMapperImpl implements PUserMapper {

     public int getCountBySex(Map<String, Integer> paramMap) {
         SqlSession sqlSession=MyBaitsUtil.getSqlSession(false);
         String statement="com.mapper.PUserMapper.getCountBySex";
         //调用存储过程，输出参数参数给usercount
         sqlSession.selectOne( statement, paramMap);
         //通过key获取value
         int count=paramMap.get("usercount");
         sqlSession.close();
         return count;
     }

 }

PUserMapperImpl.java

10.在src下com.test包下创建Test.java

 package com.test;

 import java.util.HashMap;
 import java.util.Map;

 import com.mapper.PUserMapper;
 import com.mapper.impl.PUserMapperImpl;

 public class Test {

     /**
      * @param args
      */
     public static void main(String[] args) {
         PUserMapper mapper=new PUserMapperImpl();

         Map<String, Integer> paramMap=new HashMap<String, Integer>();
         paramMap.put("sexid", 0);//0女 1男
         paramMap.put("usercount", -1);

         int count=mapper.getCountBySex(paramMap);

         if(count>0){
             System.out.println("男员工的数目为："+count);
         }

     }

 }

Test.java