dbconnectionfactory.java

来自「This project mainly deals with automatin」· Java 代码 · 共 58 行

package factory;

import javax.naming.*;
import java.sql.*;
import javax.sql.*;
import java.util.*;

public final class DBConnectionFactory
{
private static DBConnectionFactory factory;
Hashtable ht;
Context ctxt;
DataSource ds;
Connection con;
Map map;
private DBConnectionFactory()
{
try
	{
	ht=new Hashtable();
	ht.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
	ht.put(Context.PROVIDER_URL,"t3://localhost:7001");
	ctxt=new InitialContext(ht);
	map=Collections.synchronizedMap(new HashMap());
	}catch(Exception e){e.printStackTrace();}
}

public static DBConnectionFactory getFactory()
{
	if(factory==null)
		{
		factory = new DBConnectionFactory();
		return factory;
		}
	return factory;
}

public Connection getConnection (String jndiName)
{
try{
	Object o=map.get(jndiName);
	if(o==null)
		{
		ds=(DataSource)ctxt.lookup(jndiName);
		map.put(jndiName,ds);
		}
	else
		{
		ds=(DataSource)o;
		}
	con=ds.getConnection();
	}catch(Exception e){e.printStackTrace();}
return con;
}

}