public class DbUtil{
      public Connection getConn() throws Exception{
      Class.forName("com.mysql.jbdc.Driver");
      Connection conn=DriverManager.getConnection("jdbc:mysql://127.0.0.1:3306/emp_dept", "root", "111111");
      return conn;
}

    public void closeConn(Connection conn) throws Exception {
        
 
if(conn!=null){
            conn.close();
        }
    }
    public static void main(String[] args) throws Exception {
        DbUtil dbUtil=new DbUtil();
        Connection conn=dbUtil.getConn();
        if(conn!=null){
            System.out.println("數據庫連接成功");
        }else{
            System.out.println(
 
"數據庫連接失敗");
        }
        dbUtil.closeConn(conn);
    }

java連接數據庫