closesessionfilter.java

学校的课程管理及选课系统

package org.wangsong.dao.hibernate;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.*;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class CloseSessionFilter implements Filter
{
	Log logger = LogFactory.getLog(this.getClass());

	 
	protected FilterConfig config;

	public void init(FilterConfig arg0) throws ServletException
	{
		 
		this.config = arg0;
	}

	 
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException
	{
		 
		try
		{
			chain.doFilter((HttpServletRequest) request,
					(HttpServletResponse) response);
		}
		finally
		{
			try
			{
				HibernateUtil.commitTransaction();
				 
			}
			catch (Exception e)
			{
				HibernateUtil.rollbackTransaction();
			}
			finally
			{
				HibernateUtil.closeSession();
			}
		}
	}

	 
	public void destroy()
	{
		// TODO Auto-generated method stub
		this.config = null;
	}

}