dbcon.java

来自「酒店管理asp的源代码和各种文档说明,很齐全的,只要你解压后就能运行程序.」· Java 代码 · 共 64 行

// DBCon.java
import java.io.*;
import java.sql.*;

public class DBCon
{
	
	private Connection con = null;
	
	// constructor
	public DBCon()
	{
		getConnection();
	}
	
	// get connection
	public Connection getConnection()
	{
		if ( con == null )
		{
			try
	    	{
			    Class.forName( "sun.jdbc.odbc.JdbcOdbcDriver" );
			    con = DriverManager.getConnection( "jdbc:odbc:student" );
		    }catch ( Exception ex ){
			   System.out.println( ex.toString() );
		    }
		}
		return this.con;
		
		
 	} // end of get connection
	
	// close connection
	public void close()
	{
		try
		{
			con.close();
			con = null;
		}
		
		catch ( SQLException sex )
		{
			System.out.println( sex.toString() );
		}
		
	} // end of method close
	
	// automaticly run the method when object are added into session
	public void Close()
	{
		if ( con != null )
		{
		   try
		   {
			 con.close();
			 con = null;
		   }catch ( SQLException sex ){
			System.out.println( sex.toString() );
		   }
		}
	}
} // end of class DBCon