Database connection class

 This post last edited by the u012010949 on 2013-11-04 09:40:10

Here is what I wrote a database connection class , but there is a step not clear how it is, check the information to get the
would like to ask , private static final String DRIVER = "com.mysql.jdbc.Driver"; What meaning is that every path or written this way , the database is MYSQL

  package com.henu.util;
  
  import java.sql.Connection;
  import java.sql.DriverManager;
  import java.sql.ResultSet;
  import java.sql.Statement;
  
  public class DbConnection
  {
  	private static final String DRIVER = "com.mysql.jdbc.Driver";//什么意思，是指路径还是？
  	private static final String URL = "jdbc:mysql://localhost:3306/zcbtext";
  	private static final String USER = "root";//mysql用户名
  	private static final String PASSWORD = "password";
  
  	public static synchronized Connection getConn()
  	{
  		Connection conn = null;
  		try
  		{
  			Class.forName(DRIVER);
  			conn = DriverManager.getConnection(URL, USER, PASSWORD);
  
  		}
  		catch (Exception e)
  		{
  
  			e.printStackTrace();
  		}
  		return conn;
  	}
  
  	public static synchronized void closeAll(ResultSet rs, Statement st,
  			Connection conn)
  	{
  		if (rs != null)
  		{
  			try
  			{
  				rs.close();
  
  			}
  			catch (Exception e)
  			{
  
  				e.printStackTrace();
  			}
  		}
  		if (st != null)
  		{
  			try
  			{
  				st.close();
  
  			}
  			catch (Exception e)
  			{
  
  				e.printStackTrace();
  			}
  		}
  		if (conn != null)
  		{
  			try
  			{
  				conn.close();
  
  			}
  			catch (Exception e)
  			{
  
  				e.printStackTrace();
  			}
  		}
  	}
  }
  

------ Solution ------------------------------------- -------
com.mysql.jdbc.Driver
This is the calling driver names , mysql every time such written
------ Solution -------------------- ------------------------
can be understood as a kind of database driver name corresponding to one kind
- ---- Solution -------------------------------------------- < br> this is the mysql driver name , different databases corresponding to different drive name.
------ For reference only -------------------------------------- -
to load drivers