介紹如何查詢
1.查詢資料庫的值並使用Table秀出來,
sess.createQuery("from UserData"),這裡要注意UserData大小寫要和UserData.hbm.xml一致
=== queryUserData.jsp ===

	<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@page import="demo.*" %>
<%
  org.hibernate.Session sess = null;
  org.hibernate.SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
  sess = sessionFactory.openSession();
  java.util.Iterator listud = null;
  try {
    org.hibernate.Query sqlq = sess.createQuery("from UserData");
    listud = sqlq.iterate();
%>

  
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Query UserData</title>
  
  
    List Data
    <%
      if(listud!=null){
    %>
    <table border="1">
      <thead>
        <tr>
          <th>User ID</th>
          <th>User Password</th>
          <th>User Name</th>
        </tr>
      </thead>
      <%
        while(listud.hasNext()){
          UserData ud = (UserData)listud.next();
      %>
      <tbody>
        <tr>
          <td><%=ud.getUserid()%></td>
          <td><%=ud.getUserpassword()%></td>
          <td><%=ud.getUsername()%></td>
        </tr>
      </tbody>
      <%
      }
      %>
    </table>
    <%
    }else{
    %><font size="10">Not Data .</font><%
    }
    %>
  

<%
  } catch (Exception ex) {
    System.out.println(ex);
  } finally {
    sess.flush();
    sess.close();
  }
%>

2.下條件去做查詢,
主要不一樣的地方在sess.createQuery("from UserData where username like ''");
=== queryUserData2.jsp ===

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@page import="demo.*" %>
<%
  org.hibernate.Session sess = null;
  org.hibernate.SessionFactory sessionFactory = HibernateUtil.getSessionFactory();
  sess = sessionFactory.openSession();
  java.util.Iterator listud = null;
  org.hibernate.Query sqlq = null;
  try {
    String qname = request.getParameter("qname");
    if(qname!=null && !qname.equals("")){
      sqlq = sess.createQuery("from UserData where username like '%"+qname+"%'");
    }else{
      sqlq = sess.createQuery("from UserData");
    }
    listud = sqlq.iterate();
%>

  
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Query UserData</title>
  
  
    <form name="qud2" action="queryUserData2.jsp" method="POST">
      User Name : <input type="text" name="qname" value="" size="30" />
      <input type="submit" value="Query" name="query" />
    </form><hr>
    List Data
    <%
      if(listud!=null){
    %>
    <table border="1">
      <thead>
        <tr>
          <th>User ID</th>
          <th>User Password</th>
          <th>User Name</th>
        </tr>
      </thead>
      <%
        while(listud.hasNext()){
          UserData ud = (UserData)listud.next();
      %>
      <tbody>
        <tr>
          <td><%=ud.getUserid()%></td>
          <td><%=ud.getUserpassword()%></td>
          <td><%=ud.getUsername()%></td>
        </tr>
      </tbody>
      <%
      }
      %>
    </table>
    <%
    }else{
    %><font size="10">Not Data .</font><%
    }
    %>
  

<%
  } catch (Exception ex) {
    System.out.println(ex);
  } finally {
    sess.flush();
    sess.close();
  }
%>