Add mySQL & Postgress Connector and sample query

pom.xml

@@ -21,5 +21,19 @@
             <version>5.7.1</version>
             <scope>test</scope>
         </dependency>
+        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>8.0.24</version>
+        </dependency>
+        <!-- https://mvnrepository.com/artifact/org.postgresql/postgresql -->
+        <dependency>
+            <groupId>org.postgresql</groupId>
+            <artifactId>postgresql</artifactId>
+            <version>42.2.20</version>
+        </dependency>
+
+
     </dependencies>
 </project>

src/main/java/cc/javastudio/App.java

@@ -1,8 +0,0 @@
-package cc.javastudio;
-
-public class App {
-
-  public static void main(String[] args) {
-    System.out.println("Hello World");
-  }
-}

src/main/java/cc/javastudio/MysqlApp.java

@@ -0,0 +1,25 @@
+package cc.javastudio;
+
+import java.sql.*;
+
+public class MysqlApp {
+
+  public static void main(String[] args) {
+    String jdbcUrl = "jdbc:mysql://localhost:3306/20210310_bio?useSSL=false";
+    String user = "root";
+    String pass = "root";
+
+    try {
+      Connection conn = DriverManager.getConnection(jdbcUrl,user,pass);
+      Statement stmt = conn.createStatement();
+      ResultSet rs = stmt.executeQuery("select * from gwdx_postmeta");
+      while (rs.next()) {
+        String lastName = rs.getString("meta_key");
+        System.out.println(lastName);
+      }
+    } catch (SQLException throwables) {
+      throwables.printStackTrace();
+    }
+
+  }
+}

src/main/java/cc/javastudio/PostgresApp.java

@@ -0,0 +1,25 @@
+package cc.javastudio;
+
+import java.sql.*;
+
+public class PostgresApp {
+    public static void main(String[] args) {
+        String jdbcUrl = "jdbc:postgresql://localhost:5432/dvdrental";
+        String user = "postgres";
+        String pass = "";
+
+        try {
+            Connection conn = DriverManager.getConnection(jdbcUrl, user, pass);
+
+            Statement stmt = conn.createStatement();
+            ResultSet rs = stmt.executeQuery("select * from actor");
+            while (rs.next()) {
+                String firstName= rs.getString("first_name");
+                System.out.println(firstName);
+            }
+
+        } catch (SQLException throwables) {
+            throwables.printStackTrace();
+        }
+    }
+}