the HTTP port that will be used for oracle Application Express：8080
the port that will be used for the database listener:1521

/**
 *连接数据库存
 *
 */
package com.s2.dao;
import java.sql.Connection;
import java.sql.DriverManager;
public class ConnMySql
{
public ConnMySql() {}
      public static Connection ConnDB()
      {
            Connection conn = null;
            try
            {
                  //oracle的连接方法，运行里要先加入库文件即JDBC驱动
                  //Class.forName("oracle.jdbc.driver.OracleDriver");
                  //conn = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521","SYSTEM","SYSTEM");
                  System.out.println("连接MYSQL成功！");
            }
            catch(Exception e)
            {
                  e.printStackTrace();
            }
            return conn;
      }
      //关闭连接
      public static void CloseDB(Connection conn)
      {
            try
            {
                  if(!conn.isClosed())
                  {
                        conn.close();
                  }
            }
            catch(Exception e)
            {
                  e.printStackTrace();
            }
      }
      public static void main(String[] arge)
      {
            ConnMySql connmysql = new ConnMySql();
            connmysql.ConnDB();
      }
}

--转自