JDBC DB연결셋팅

package main;

import db.jdbctest;

public class mainClass {

	public static void main(String[] args) {
		/*
			JDBC
			java database connectivity
		 */
		
		jdbctest jt = new jdbctest();
		
		jt.getConnection();

	}

}

mainClass.java

package db;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class jdbctest {
	
	public jdbctest() {
		
		try {
			Class.forName("oracle.jdbc.driver.OracleDriver"); 
            // 이 클래스가 존재를 하냐 안하냐 할수 있게 해준다.
			
			System.out.println("Driver Loding Success!!");
		} catch (ClassNotFoundException e) {
			
			e.printStackTrace();
		} 
	}
	
	public Connection getConnection() {
		
		Connection conn = null;
		
		try {
			conn = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:xe", "hr", "hr");
			
			System.out.println("DB Connection Success!!");
		} catch (SQLException e) {
			e.printStackTrace();
		}
		
		return conn;
	}

}

jdbctest.java