[Mybatis] Mybatis 프로젝트 만들기

EB·2021년 6월 10일

👩🏼‍🏫Mybatis 프로젝트 시작하기

New-Maven Project 생성

📌pom.xml 내용 추가

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.springbook</groupId>
  <artifactId>biz</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>MybatisProject</name>
  <dependencies>
  	<dependency>
  		<groupId>org.springframework</groupId>
  		<artifactId>spring-context</artifactId>
  		<version>5.2.2.RELEASE</version>
  	</dependency>
  	
  	<!-- Mybatis -->
  	<dependency>
  		<groupId>org.mybatis</groupId>
  		<artifactId>mybatis</artifactId>
  		<version>3.3.1</version>
  	</dependency>
  	
  	<!-- Ibatis -->
  	<dependency>
  		<groupId>org.apache.ibatis</groupId>
  		<artifactId>ibatis-core</artifactId>
  		<version>3.0</version>
  	</dependency>
  </dependencies>
  <build>
  	<plugins>
  		<plugin>
  			<artifactId>maven-compiler-plugin</artifactId>
  			<version>3.1</version>
  			<configuration>
  				<source>1.8</source>
  				<target>1.8</target>
  				<encoding>utf-8</encoding>
  			</configuration>
  		</plugin>
  	</plugins>
  </build>
</project>

📌프로젝트 선택 후 - Properties- Project Facets - Java - jdk 선택

📌src > main > webapp > lib 폴더 생성후 ojdbc.jar를 넣어준다.

📌Maven Dependencies에 mybatis와 ibatis가 들어간걸 확인!

📌Mybatis Mapper XML 선택

📌board-mapping.xml 생성

📌src/main/resourses에 mappings라는 패키지 생성 후
미리 만든 board-mapping.xml을 옮겨준다.

📌Mybatis 환경설정 파일 생성하기

New-Others... > Mybatis Configuration XML 선택

📌src/main/resources로 db.properties와 sql-map-config.xml을 이동

📌db.properties 수정

📌sql-map-config.xml 수정

<?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>
<!-- Properties 파일 설정 -->
	<properties resource="db.properties" />
	
	<!-- Alias 설정 -->
	<typeAliases>
		<typeAlias type="com.springbook.biz.board.BoardVO" alias="board"></typeAlias>
	</typeAliases>
	
	<!-- Datasource 설정 -->
	<environments default="development">
		<environment id="development">
			<transactionManager type="JDBC" />
			<dataSource type="POOLED">
				<property name="driver" value="${jdbc.driverClassName}" />
				<property name="url" value="${jdbc.url}" />
				<property name="username" value="${jdbc.username}" />
				<property name="password" value="${jdbc.password}" />
			</dataSource>
		</environment>
	</environments>
	
	<!-- Sql Mapper 설정 -->
	<mappers>
		<mapper resource="mappings/board-mapping.xml" />
	</mappers>
</configuration>

📌SqlSession 객체 생성

SqlSessionFactoryBean 작성

package com.springbook.biz.util;

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 SqlSessionFactoryBean {
	private static SqlSessionFactory sessionFactory = null;
	static {
		try {
			if(sessionFactory == null) {
				Reader reader = Resources.getResourceAsReader("sql-map-config.xml");
				sessionFactory = new SqlSessionFactoryBuilder().build(reader);
			}
		}catch(Exception e) {
			e.printStackTrace();
		}
	}
	
	public static SqlSession getSqlSessionInstance() {
		return sessionFactory.openSession();
	}
}

📌BoardDAO 작성

package com.springbook.biz.board.impl;

import java.util.List;

import org.apache.ibatis.session.SqlSession;

import com.springbook.biz.board.BoardVO;
import com.springbook.biz.util.SqlSessionFactoryBean;

public class BoardDAO {
	private SqlSession mybatis;
	
	public BoardDAO() {
		mybatis = SqlSessionFactoryBean.getSqlSessionInstance();
	}
	
	public void insertBoard(BoardVO vo) {
		//mapper에 있는 name으로 호출
		mybatis.insert("BoardDAO.insertBoard",vo);
		mybatis.commit();
	}
	
	public void updateBoard(BoardVO vo) {
		mybatis.update("BoardDAO.updateBoard",vo);
		mybatis.commit();
	}
	
	public void deleteBoard(BoardVO vo) {
		mybatis.delete("BoardDAO.deleteBoard",vo);
		mybatis.commit();
	}
	
	public BoardVO getBoard(BoardVO vo) {
		return (BoardVO) mybatis.selectOne("BoardDAO.getBoard",vo);
	}
	
	public List<BoardVO> getBoardList(BoardVO vo){
		return mybatis.selectList("BoardDAO.getBoardList",vo);
	}
	
	

}

📌mappings - board-mapping.xml 에 쿼리문 작성

<?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="BoardDAO">
	<insert id="insertBoard">
		<![CDATA[
			INSERT INTO BOARD(SEQ,TITLE,WRITER,CONTENT)
			VALUES((SELECT NVL(MAX(SEQ),0+1 FROM BOARD),#{title},#{writer},#{content}
		]]>
	</insert>
	
	<update id="updateBoard">
		<![CDATA[
			UPDATE BOARD 
			SET TITLE=#{title},
				CONTENT=#{content}
			WHERE SEQ=#{seq}
			
		]]>
	</update>
	
	<delete id="deleteBoard">
		<![CDATA[
			DELETE BOARD 
			WHERE SEQ=#{seq}
		]]>
	</delete>
	
	<select id="getBoard" resultType="board">
		<![CDATA[
			SELECT * 
			FROM BOARD
			WHERE SEQ=#{seq}
		]]>
	</select>
	
	<select id="getBoardList" resultType="board">
		<![CDATA[
		
			SELECT *
			FROM BOARD
			WHERE TITLE LIKE '%'||#{searchKeyword}||'%'
			ORDER BY SEQ DESC
		]]>
	</select>

</mapper>