diff --git a/study/src/test/java/connectionpool/stage0/Stage0Test.java b/study/src/test/java/connectionpool/stage0/Stage0Test.java
index 4009bc07a8..8ab8683a60 100644
--- a/study/src/test/java/connectionpool/stage0/Stage0Test.java
+++ b/study/src/test/java/connectionpool/stage0/Stage0Test.java
@@ -1,19 +1,21 @@
 package connectionpool.stage0;
 
-import org.h2.jdbcx.JdbcDataSource;
-import org.junit.jupiter.api.Test;
+import static org.assertj.core.api.Assertions.assertThat;
 
+import java.io.InputStream;
 import java.sql.Connection;
 import java.sql.DriverManager;
-import java.sql.SQLException;
-
-import static org.assertj.core.api.Assertions.assertThat;
+import java.util.Properties;
+import javax.sql.DataSource;
+import org.h2.jdbcx.JdbcDataSource;
+import org.junit.jupiter.api.Test;
 
 class Stage0Test {
 
-    private static final String H2_URL = "jdbc:h2:./test";
-    private static final String USER = "sa";
-    private static final String PASSWORD = "";
+    private static final String DB_PROPERTIES = "db.properties";
+    private static final String PROPERTY_DB_URL = "db.url";
+    private static final String PROPERTY_DB_USER = "db.user";
+    private static final String PROPERTY_DB_PASSWORD = "db.password";
 
     /**
      * DriverManager
@@ -27,10 +29,16 @@ class Stage0Test {
      * https://docs.oracle.com/javadb/10.8.3.0/ref/rrefjdbc4_0summary.html
      */
     @Test
-    void driverManager() throws SQLException {
+    void driverManager() throws Exception {
         // Class.forName("org.h2.Driver"); // JDBC 4.0 부터 생략 가능
         // DriverManager 클래스를 활용하여 static 변수의 정보를 활용하여 h2 db에 연결한다.
-        try (final Connection connection = DriverManager.getConnection(H2_URL, USER, PASSWORD)) {
+        final Properties props = loadProps();
+
+        final String url = props.getProperty(PROPERTY_DB_URL);
+        final String user = props.getProperty(PROPERTY_DB_USER);
+        final String password = props.getProperty(PROPERTY_DB_PASSWORD);
+
+        try (final Connection connection = DriverManager.getConnection(url, user, password)) {
             assertThat(connection.isValid(1)).isTrue();
         }
     }
@@ -42,21 +50,39 @@ void driverManager() throws SQLException {
      * 테스트 코드의 JdbcDataSource 클래스는 h2에서 제공하는 클래스다.
      *
      * DriverManager가 아닌 DataSource를 사용하는 이유
-     * - 애플리케이션 코드를 직접 수정하지 않고 properties로 디비 연결을 변경할 수 있다.
+     * - DataSource는 인터페이스이기 때문에 H2, MySQL, PostgreSQL 같은 DB 벤더별 DataSource,
+     *   혹은 HikariCP/DBCP2 같은 커넥션 풀 구현체를 코드 수정 없이 교체할 수 있다.
      * - 커넥션 풀링(Connection pooling) 또는 분산 트랜잭션은 DataSource를 통해서 사용 가능하다.
      *
      * Using a DataSource Object to Make a Connection
      * https://docs.oracle.com/en/java/javase/11/docs/api/java.sql/javax/sql/package-summary.html
      */
     @Test
-    void dataSource() throws SQLException {
-        final JdbcDataSource dataSource = new JdbcDataSource();
-        dataSource.setURL(H2_URL);
-        dataSource.setUser(USER);
-        dataSource.setPassword(PASSWORD);
+    void dataSource() throws Exception {
+        final Properties props = loadProps();
+
+        // 구현체 설정(H2)
+        final JdbcDataSource jdbcDataSource = new JdbcDataSource();
+        final String url = props.getProperty(PROPERTY_DB_URL);
+        jdbcDataSource.setURL(url);
+        final String user = props.getProperty(PROPERTY_DB_USER);
+        jdbcDataSource.setUser(user);
+        final String password = props.getProperty(PROPERTY_DB_PASSWORD);
+        jdbcDataSource.setPassword(password);
+
+        // 사용부는 인터페이스만 의존
+        final DataSource dataSource = jdbcDataSource;
 
         try (final var connection = dataSource.getConnection()) {
             assertThat(connection.isValid(1)).isTrue();
         }
     }
+
+    private Properties loadProps() throws Exception {
+        final Properties props = new Properties();
+        try (final InputStream in = getClass().getClassLoader().getResourceAsStream(DB_PROPERTIES)) {
+            props.load(in);
+        }
+        return props;
+    }
 }
diff --git a/study/src/test/resources/db.properties b/study/src/test/resources/db.properties
new file mode 100644
index 0000000000..9659826101
--- /dev/null
+++ b/study/src/test/resources/db.properties
@@ -0,0 +1,3 @@
+db.url=jdbc:h2:mem:testdb
+db.user=sa
+db.password=