threadlocal

1    private static final ThreadLocal threadSession = new ThreadLocal();
2
3    public static Session getSession() throws InfrastructureException {
4        Session s = (Session) threadSession.get();
5        try {
6            if (s == null) {
7                s = getSessionFactory().openSession();
8                threadSession.set(s);
9            }
10        } catch (HibernateException ex) {
11            throw new InfrastructureException(ex);
12        }
13        return s;
14    }
15
16
17public class ConnectionUtil {
18    private static ThreadLocal<Connection> tl = new ThreadLocal<Connection>();
19    private static Connection initConn = null;
20    static {
21        try {
22            initConn = DriverManager.getConnection("url, name and password");
23        } catch (SQLException e) {
24            e.printStackTrace();
25        }
26    }
27    
28    public Connection getConn() {
29        Connection c = tl.get();
30        if(null == c) tl.set(initConn);
31        return tl.get();
32    }
33    
34}