hellohibernatefilter.java

ServletFilter+ThreadLocal+DAO

package com.xanada;

import com.xanada.helper.*;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;

import net.sf.hibernate.*;

public class HelloHibernateFilter implements Filter {

    public void init(FilterConfig filterConfig)
        throws ServletException {
        try {
            HibernateSessionFactory.init();
        } catch (HibernateException e) {
            e.printStackTrace();
        }
    }

    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
        throws ServletException, IOException {
        try {
            chain.doFilter(req, res);
        } finally {
            try {
                HibernateSessionFactory.closeSession();
            } catch (HibernateException e) {
                e.printStackTrace();
            }
        }
    }

    public void destroy() {
    }
}