求救 初级hibernate

package pension;import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.Action;
import org.hibernate.*;
import org.hibernate.cfg.*;
import java.util.*;
import pension.hib.CtUser;
public class LoginAction extends Action {
    public static SessionFactory sessionFactory;
    static {
        try {
            sessionFactory = new Configuration().configure().
                             buildSessionFactory();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }    public ActionForward execute(ActionMapping actionMapping,
                                 ActionForm actionForm,
                                 HttpServletRequest servletRequest,
                                 HttpServletResponse servletResponse) {
        LoginForm loginForm = (LoginForm) actionForm;
        String usrid = loginForm.getUserId();
        String password = loginForm.getPassword();
        Session session = sessionFactory.openSession();
        Transaction tx = null;
        try {
            tx = session.beginTransaction();
            Query query = session.createQuery("select a from CT_USER as a");
            
            for (Iterator it = query.iterate(); it.hasNext(); ) {
                CtUser ctuser = (CtUser) it.next();
                System.out.println(ctuser.getUserId() + "<br>");
            }            tx.commit();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            session.close();
        }        System.out.println();
        return (actionMapping.findForward(""));
    }
}
配置为
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping
    PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping>
<class
    name="pension.hib.CtUser"
    table="CT_USER"
>
   
    <id
        name="userId"
        
        column="USER_ID"
    >
        <generator class="assigned" />
    </id>    <property
        name="password"
        
        column="PASSWORD"
        length="10"
    >
        
    </property>
    <property
        name="createUser"
       
        column="CREATE_USER"
        length="20"
    >
        
    </property>
    <property
        name="createDate"
       
        column="CREATE_DATE"
        length="7"
    >
       
    </property>
    <property
        name="userName"
       
        column="USER_NAME"
        length="20"
    >
       
    </property>
    <property
        name="empNo"
       
        column="EMP_NO"
        length="15"
    >
        
    </property>
    <property
        name="beginDate"
    
        column="BEGIN_DATE"
        length="7"
    >
        
    </property>
    <property
        name="endDate"
        
        column="END_DATE"
        length="7"
    >
       
    </property>
    <property
        name="maintainUser"
       
        column="MAINTAIN_USER"
        length="20"
    >
        
    </property>
    <property
        name="maintainDate"
       
        column="MAINTAIN_DATE"
        length="7"
    >
        
    </property>    <!-- Associations -->    <!-- bi-directional one-to-many association to CtUserAccess
    <set
        name="ctUserAccesses"
        lazy="true"
        inverse="true"
cascade="none"
    >
        <meta attribute="field-description">
           @hibernate.set
            lazy="true"
            inverse="true"
            cascade="none"           @hibernate.collection-key
            column="USER_ID"           @hibernate.collection-one-to-many
            class="com.teammax.hib.pension.CtUserAccess"
        </meta>
        <key>
            <column name="USER_ID" />
        </key>
        <one-to-many
            class="com.teammax.hib.pension.CtUserAccess"
        />
    </set>
-->
</class>
</hibernate-mapping>