JavaSevlet_MVC
jdbc.properties
#key=value
#db 4 information
oracle.jdbc=oracle.jdbc.driver.OracleDriver
oracle.url=jdbc:oracle:thin:@localhost:1521:xe
oracle.userid=scott
oracle.passwd=tiger
mysql.jdbc=com.mysql.jdbc.Driver
mysql.url=jdbc:mysql:localhost:3306\orcl
mysql.userid=scott
mysql.passwd=tiger
Configuratoin
<?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 resource = "jdbc.properties"/>
<typeAliases>
<typeAlias type="DTO" alias="DTO"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${oracle.jdbc}"/>
<property name="url" value="${oracle.url}"/>
<property name="username" value="${oracle.userid}"/>
<property name="password" value="${oracle.passwd}"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="DeptMapper.xml"/>
</mappers>
</configuration>
SqlSessionFactory
import java.io.IOException;
import java.io.InputStream;
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 Factory {
static SqlSessionFactory sqlSessionFactory= null;
static {
String resource = "Configuration.xml"; //수정이 필요한 유일한 부분
InputStream inputStream= null;
try {
inputStream = Resources.getResourceAsStream(resource);
System.out.println("configuration.xml 로딩 성공 ");
} catch (IOException e) {
e.printStackTrace();
}
sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
}
public static SqlSession getSqlSession() {//
SqlSession session = sqlSessionFactory.openSession();
return session;
}
}
DTO
public class DTO {
int deptno;
String dname;
String loc;
public DTO() {
super();
// TODO Auto-generated constructor stub
}
public DTO(int deptno, String dname, String loc) {
super();
this.deptno = deptno;
this.dname = dname;
this.loc = loc;
}
public int getDeptno() {
return deptno;
}
public void setDeptno(int deptno) {
this.deptno = deptno;
}
public String getDname() {
return dname;
}
public void setDname(String dname) {
this.dname = dname;
}
public String getLoc() {
return loc;
}
public void setLoc(String loc) {
this.loc = loc;
}
}
Main
<?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="DeptMapper">
<select id="selectAll" resultType="DTO">
select * from dept
</select>
</mapper>
Service
import java.util.List;
import org.apache.ibatis.session.SqlSession;
public class Service {
DAO dao;
public Service() {
super();
dao = new DAO();
}
public List<DTO> selectAll() {
List<DTO> list = null;
SqlSession session = Factory.getSqlSession();
try {
list = dao.selectAll(session);
} finally {
session.close();
}
return list;
}
}
DAO
import java.util.List;
import org.apache.ibatis.session.SqlSession;
public class DAO {
public List<DTO> selectAll(SqlSession session) {
List<DTO> list = session.selectList("DeptMapper.selectAll");
return list;
}
}
Mapper
<?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="DeptMapper">
<select id="selectAll" resultType="DTO">
select * from dept
</select>
</mapper>