$JAVA_HOME/jre/lib/ext/에 jdbc connect library를 넣어주면 된다.

import java.sql.DriverManager;

import java.sql.Connection;

import java.sql.SQLException;


public class JDBCExample {


  public static void main(String[] argv) {


        System.out.println("-------- MySQL JDBC Connection Testing ------------");


        try {

                Class.forName("com.mysql.jdbc.Driver");

        } catch (ClassNotFoundException e) {

                System.out.println("Where is your MySQL JDBC Driver?");

                e.printStackTrace();

                return;

        }


        System.out.println("MySQL JDBC Driver Registered!");

        Connection connection = null;


        try {

                connection = DriverManager

                .getConnection("jdbc:mysql://localhost:3306/testDB","root", "password");


        } catch (SQLException e) {

                System.out.println("Connection Failed! Check output console");

                e.printStackTrace();

                return;

        }


        if (connection != null) {

                System.out.println("You made it, take control your database now!");

        } else {

                System.out.println("Failed to make connection!");

        }

  }

}

import java.sql.DriverManager;

import java.sql.Connection;

import java.sql.SQLException;


public class Example1 {

  public static void main(String[] argv) {

  System.out.println("Checking if Driver is registered with DriverManager.");


  try {

    Class.forName("org.postgresql.Driver");

  } catch (ClassNotFoundException cnfe) {

    System.out.println("Couldn't find the driver!");

    System.out.println("Let's print a stack trace, and exit.");

    cnfe.printStackTrace();

    System.exit(1);

  }


  System.out.println("Registered the driver ok, so let's make a connection.");


  Connection c = null;


  try {

    // The second and third arguments are the username and password,

    // respectively. They should be whatever is necessary to connect

    // to the database.

    c = DriverManager.getConnection("jdbc:postgresql://localhost/DBname",

                                    "DBuser", "DBpassword");

  } catch (SQLException se) {

    System.out.println("Couldn't connect: print out a stack trace and exit.");

    se.printStackTrace();

    System.exit(1);

  }


  if (c != null)

    System.out.println("Hooray! We connected to the database!");

  else

    System.out.println("We should never get here.");

  }

}

+ Recent posts