import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Arrays;

public class MySqlConnectTest {
    public static void main(String[] args) {
        String[][] dbInfoArrays = new String[][]{
                {"jdbc:mysql://localhost:3306/root_db", "root", "*********"},
                {"jdbc:mysql://localhost:3306/test_db", "tester", "******"},
                {"jdbc:mysql://**.***.*.**:3306/root_db", "root", "*********"},
                {"jdbc:mysql://**.***.*.**:3306/test_db", "tester", "******"}};
        for (String[] dbInfoArray : dbInfoArrays) {
            Connection conn = null;
            Statement st = null;
            ResultSet rs = null;
            try {
                Class.forName("com.mysql.jdbc.Driver");
                conn = DriverManager.getConnection(dbInfoArray[0],
                        dbInfoArray[1], dbInfoArray[2]);
                st = conn.createStatement();
                rs = st.executeQuery("select * from user_info");
                while (rs.next()) {
                    System.out.println(rs.getString(1) + "\t" + rs.getInt(2)
                            + "\t" + "接続情報 = "
                            + Arrays.deepToString(dbInfoArray));
                }
            } catch (ClassNotFoundException clsEx) {
                clsEx.printStackTrace();
            } catch (SQLException sqlEx) {
                System.out.println("接続失敗／接続情報 = "
                        + Arrays.deepToString(dbInfoArray));
                sqlEx.printStackTrace();
            } finally {
                try {
                    if (rs != null) {
                        rs.close();
                    }
                } catch (SQLException sqlEx) {
                    sqlEx.printStackTrace();
                }
                try {
                    if (st != null) {
                        st.close();
                    }
                } catch (SQLException sqlEx) {
                    sqlEx.printStackTrace();
                }
                try {
                    if (conn != null) {
                        conn.close();
                    }
                } catch (SQLException sqlEx) {
                    sqlEx.printStackTrace();
                }
            }
        }
    }
}