DatabaseConnection 累

package com.knowology.haobai.jdbc;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

public class DatabaseConnection {  private static final String DBDRIVER = "org.gjt.mm.mysql.Driver";  private static final String DBURL = "jdbc:mysql://localhost:3306/knowology";  private static final String DBUSER = "root";  private static final String DBPASSWORD = "mysqladmin";  private Connection conn = null;  public DatabaseConnection() {   // TODO Auto-generated constructor stub   try {    Class.forName(DBDRIVER);    this.conn = DriverManager.getConnection(DBURL, DBUSER, DBPASSWORD);   } catch (Exception e) {    // TODO Auto-generated catch block    e.printStackTrace();   }  }  public Connection getConnection(){   return this.conn;  }  public void close(){   if(this.conn!=null){    try {     this.conn.close();    } catch (SQLException e) {     // TODO Auto-generated catch block     e.printStackTrace();    }   }  } }