아래 순서로 설명.
1. MySql DB 구축
2. 웹앱 생성
3. MyBatis 설정
3.1. 필요한 라이브러리 설치
3.2. 환경 설정
3.3. 맵퍼 생성
3.4. JSP 연동
4. 웹 페이지 생성
5. 테스트
2. 웹앱 생성
3. MyBatis 설정
3.1. 필요한 라이브러리 설치
3.2. 환경 설정
3.3. 맵퍼 생성
3.4. JSP 연동
4. 웹 페이지 생성
5. 테스트
최종 폴더 구조:
1. MySql DB 구축
- 테스트용 계정을 아래와 같이 설정했다.
User name : "username"
Password : "password"
1) test 스키마를 생성한다.
mysql> create schema test;
2) users 테이블을 생성한다.
mysql> use test; mysql> create table users ( `username` varchar(255) not null, `password` varchar(255) not null, `email` varchar(255) not null, primary key (`username`) ) default charset=utf8;
3) user 를 생성한다.
mysql> create user 'username'@'localhost' identified by 'password';
4) test 스키마에 대한 권한을 설정한다.
mysql> grant all privileges on test.* to 'username'@'locahost';
2. 웹앱 생성
- 폴더 구조
+ $WEB_APP/ + WEB-INF/ + libs/ - web.xml + index.jsp
web.xml 소스:
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" metadata-complete="true" version="3.0"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
3. MyBatis 설정
3.1. 필요한 라이브러리 설치
- 다운로드
- MySql JDBC driver 다운로드 : http://www.mysql.com/downloads/connector/j/
- MyBatis 다운로드 : http://code.google.com/p/mybatis/downloads/list?can=3&q=Product%3DMyBatis
- commons dbcp 다운로드: http://commons.apache.org/dbcp/
- commons pool 다운로드: http://commons.apache.org/pool/
!) MyBatis 폴더에 lib 폴더에 있는 파일들도 복사한다.
- asm-3.3.1.jar
- cglib-2.2.2.jar
- commons-dbcp-1.4.jar
- commons-logging-1.1.1.jar
- commons-pool-1.6.jar
- log4j-1.2.16.jar
- mybatis-3.1.1.jar
- mysql-connector-java-5.1.20-bin.jar
- slf4j-api-1.6.2.jar
- slf4j-log4j12-1.6.2.jar
3.2. 환경 설정
- mybatis 설정 파일인 mybatis-config.xml 파일을 생성한다.(파일 이름은 중요하지 않다)
!) com.sample.mybatis.config 패키지에 생성하였다.
!) 파일 내용: JDBC 설정만 들어 있다.
<?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> <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://localhost:3306/test"/> <property name="username" value="username"/> <property name="password" value="password"/> </dataSource> </environment> </environments> </configuration>
3.3. 맵퍼 생성
- 필요한 파일들
- User.java - 레코드 아이템
- UserMapper.java - SQL 문 수행을 위한 인터페이스
- UserMap.xml - SQL 문 맵퍼
- 소스 코드들
com.sample.mybatis.dto.User.java:
package com.sample.mybatis.dto; public class User { private String username; private String password; private String email; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } }com.sample.mybatis.dao.UserMapper.java:
package com.sample.mybatis.dao; import java.util.List; import com.sample.mybatis.dto.User; public interface UserMapper { public List<User> selectAllUsers(); public User selectUser(String username); public void insertUser(User user); public void updateUser(User user); public void deleteUser(String username); }com.sample.mybatis.sqlmap.UserMap.xml:
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN" "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd"> <mapper namespace="com.sample.mybatis.dao.UserMapper"> <select id="selectAllUsers" resultType="User"> select username as username, password as password, email as email from users; </select> <select id="selectUser" parameterType="string" resultType="User"> select username as username, password as password, email as email from users where username=#{username}; </select> <insert id="insertUser" parameterType="User"> insert into users (username, password, email) values (#{username}, #{password}, #{email}); </insert> <update id="updateUser" parameterType="User"> update users set password=#{password}, email=#{email} where username=#{username} </update> <delete id="deleteUser" parameterType="string"> delete from users where username=#{username} </delete> </mapper>
- mybatis-config.xml 에 추가
<?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> <!-- Type alias --> <typeAliases> <typeAlias alias="User" type="com.sample.mybatis.dto.User"/> </typeAliases> <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://localhost:3306/test"/> <property name="username" value="username"/> <property name="password" value="password"/> </dataSource> </environment> </environments> <!-- UserMap.xml 등록 --> <mappers> <mapper resource="com/sample/mybatis/sqlmap/UserMap.xml" /> </mappers> </configuration>
3.4. JSP 연동
- 서버 시작시에 SqlSessionFactory 를 생성해야 한다.
- SqlSessionFactory 를 생성하는 서블릿을 생성한다.
com.sample.mybatis.config.MyBatisConfig.java : 서버 시작시 init 함수가 실행된다.
package com.sample.mybatis.config; import java.io.IOException; import java.io.InputStream; import javax.servlet.http.HttpServlet; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; public class MyBatisConfig extends HttpServlet { private static SqlSessionFactory sqlSessionFactory; public void init() { try { InputStream inputStream = Resources.getResourceAsStream("com/sample/mybatis/config/mybatis-config.xml"); sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); } catch (IOException e) { e.printStackTrace(); } } public static SqlSessionFactory getSqlSessionFactory() { return sqlSessionFactory; } public static void setSqlSessionFactory(SqlSessionFactory sqlSessionFactory) { MyBatisConfig.sqlSessionFactory = sqlSessionFactory; } }
- web.xml 설정 : load-on-startup 을 설정해 줘야 한다.
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" metadata-complete="true" version="3.0"> <!-- MyBatis initializer 등록 --> <servlet> <servlet-name>MyBatisInitializer</servlet-name> <servlet-class>com.sample.mybatis.config.MyBatisConfig</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
4. 웹 페이지 생성
- User 레코드 생성, 수정, 삭제 할 수 있는 페이지 (validation 미포함)
user_control.jsp :
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ page import="com.sample.mybatis.config.MyBatisConfig" %> <%@ page import="com.sample.mybatis.dao.*" %> <%@ page import="com.sample.mybatis.dto.*" %> <%@ page import="org.apache.ibatis.session.*" %> <%@ page import="java.util.*" %> <% // handle operation if (request.getMethod().equalsIgnoreCase("POST")) { SqlSession sqlSession = MyBatisConfig.getSqlSessionFactory().openSession(true); try { UserMapper userMapper = sqlSession.getMapper(UserMapper.class); String subtype = request.getParameter("subtype"); if (subtype.equals("create-user")) { User user = new User(); user.setUsername(request.getParameter("username")); user.setPassword(request.getParameter("password")); user.setEmail(request.getParameter("email")); userMapper.insertUser(user); } else if (subtype.equals("modify-user")) { User user = new User(); user.setUsername(request.getParameter("username")); user.setPassword(request.getParameter("password")); user.setEmail(request.getParameter("email")); userMapper.updateUser(user); } else if (subtype.equals("delete-user")) { userMapper.deleteUser(request.getParameter("username")); } } finally { sqlSession.close(); } } // select users List<User> users = null; SqlSession sqlSession = MyBatisConfig.getSqlSessionFactory().openSession(true); try { UserMapper userMapper = sqlSession.getMapper(UserMapper.class); users = userMapper.selectAllUsers(); } finally { sqlSession.close(); } %> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>User Control</title> </head> <body> <h2>Create User</h2> <form name="create-form" method="post"> <input type="hidden" name="subtype" value="create-user" /> Username: <input type="text" name="username" value="" /><br /> Password: <input type="password" name="password" value="" /><br /> Email: <input type="email" name="email" value="" /><br /> <input type="submit" value="Create" /> </form> <h2>User List</h2> <ul> <% if (users == null || users.size() == 0) { %><li>no user</li><% } else { for (User user : users) { %> <li style="border:solid 1px black;padding:4px;margin-bottom:5px;"> <form name="modify-form" method="post"> <input type="hidden" name="subtype" value="modify-user" /> <input type="hidden" name="username" value="<%= user.getUsername() %>" /> Username: <%= user.getUsername() %><br /> Password: <input type="password" name="password" value="" /><br /> Email: <input type="text" name="email" value="<%= user.getEmail() %>" /><br /> <input type="submit" value="Modify" /> </form> <form name="delete-form" method="post"> <input type="hidden" name="subtype" value="delete-user" /> <input type="hidden" name="username" value="<%= user.getUsername() %>" /> <input type="submit" value="Delete" /> </form> </li> <% } } %> </ul> </body> </html>!) SqlSessionFactory.openSession() 함수에 true 를 인자로 주면 작업이 끝나면 자동으로 commit 한다.
5. 테스트
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