iBATIS 입문

에서
1: jar 가방 가입
2: 데이터 원본 만 들 기 (configuration. xml) 데이터베이스 만 들 기 (생략)

<?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>
	<typeAliases>
		<!--          user -->
		<typeAlias type="com.forum.po.User" alias="User" />
	</typeAliases>
	<!--           BD2    -->
	<environments default="development">
		<environment id="development">
			<transactionManager type="jdbc" />
			<dataSource type="POOLED">
				<property name="driver" value="com.ibm.db2.jcc.DB2Driver" />
				<property name="url" value="jdbc:db2://localhost:50000/forum" />
				<property name="username" value="DB2ADMIN" />
				<property name="password" value="admin" />
			</dataSource>
		</environment>
	</environments>
	<mappers>
		<!--userMapper.xml          “dao”        -->
		<mapper resource="myBatis/userMapper.xml" />
	</mappers>
</configuration> 

 3: 실체 클래스 만 들 기 USER

package com.forum.po;

/**
 *    
 * 
 * @author db2admin
 * 
 */
public class User extends Entity {
	private String name;
	private Integer age;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}
	public User() {
	}

}

 4: dao 인 터 페 이 스 를 만 듭 니 다. Mapper 인터페이스 라 고 할 수 있 습 니 다. UserMapper

package com.forum.dao;

import com.forum.po.User;

public interface UserMapper {
	public User findById(String Id);
}

 5: dao 를 만 드 는 것 은 hibenarte 와 달리 xml 파일, 즉 userMapper. xml 입 니 다.

<?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">
	<!--    dao       namespace           -->
<mapper namespace="com.forum.dao.UserMapper">
	<!-- findById                  User                            -->
	<select id="findById" parameterType="HashMap" resultType="User">
		select
		* from butone.student where id=#{id}
    </select>
</mapper>

 6: 테스트 클래스, MyBatisTest

package com.forum.test;

import java.io.IOException;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import com.forum.dao.UserMapper;
import com.forum.po.User;

/**
 * myBatis       
 * 
 * @author db2admin
 * 
 */
public class MyBatisTest {
	/**
	 *   MyBatis SqlSessionFactory  
	 * SqlSessionFactory    SqlSession，      ，    SqlSession         ，commit，rollback，close   。
	 * @return
	 */
	private static SqlSessionFactory getSessionFactory() {
		SqlSessionFactory sessionFactory = null;
		String resource = "configuration.xml";
		try {
			sessionFactory = new SqlSessionFactoryBuilder().build(Resources
					.getResourceAsReader(resource));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return sessionFactory;
	}

	public static void main(String[] args) {
		SqlSession sqlSession = getSessionFactory().openSession();
		UserMapper userMapper = sqlSession.getMapper(UserMapper.class);
		User user = userMapper.findById("1");
		System.out.println(user.getName());

	}

}