MyBatisの練習

package hogehoge;

import java.io.InputStream;
import java.util.List;
import java.util.Map;

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

public class Main {

	public static void main(String[] args) throws Exception {
		try (InputStream in = Main.class.getResourceAsStream("/mybatis-config.xml")) {
			SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
			try (SqlSession session = factory.openSession()) {
				List<Map<String, Object>> result = session.selectList("sample.mybatis.selectTest", 1);
				result.forEach(row -> {
					System.out.println("---------------");
					row.forEach((columnName, value) -> {
						System.out.printf("columnName=%s, value=%s%n", columnName, value);
					});
				});
			}
		}
	}

}
 ||<

>|java|
<?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="sample_id">
		<environment id="sample_id">
			<transactionManager type="JDBC" />
			<dataSource type="POOLED">
				<property name="driver" value="org.postgresql.Driver" />
				<property name="url" value="jdbc:postgresql://localhost:5432/postgres" />
				<property name="username" value="postgres" />
				<property name="password" value="root" />
			</dataSource>
		</environment>
	</environments>
	<mappers>
		<mapper resource="sample_mapper.xml" />
	</mappers>
</configuration>

 ||<

>|java|
<?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="sample.mybatis">
	<select id="selectTest" resultType="map">
		select * from test_table where id=#{id} or '#{sam}' = '#{sam}'
	</select>
</mapper>