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young — Thu, 26 Oct 2006 04:54:00 GMT

sql:
select top 10 * from table order by newid()

hql:

String hql = "from com.company.dao.table order by newid()";

Query q = session.createQuery(hql);
q.setFirstResult(0);
q.setMaxResults(10);
al = q.list();

young 2006-10-26 12:54 发表评论

young — Tue, 24 Oct 2006 05:15:00 GMT

JSP�Q?br />

<SCRIPT type="text/javascript">
    var req;
    window.onload=function(){
    }

    function Change_Select()
    {
        var zhi=document.getElementById('spec').value;
        var url="makePaperAction.do?id="+escape(zhi);

        if(window.XMLHttpRequest)
        {
            req=new XMLHttpRequest();
        }else if(window.ActiveXObject)
        {
            req=new ActiveXObject("Microsoft.XMLHTTP");
        }

        if(req)
        {
            req.open("GET",url,true);
            req.onreadystatechange=callback;
            req.send(null);
        }
    }

    function callback()
    {
        if(req.readyState == 4)
        {
            if(req.status == 200)
            {
                parseMessage();
            }else{
                alert("Not able to retrieve description"+req.statusText);
            }
        }
    }

    function parseMessage()
    {
        var xmlDoc=req.responseXML.documentElement;
        var xSel=xmlDoc.getElementsByTagName('select');
        var select_root=document.getElementById('worktype');
        select_root.options.length=0;

        for(var i=0;i<xSel.length;i++)
        {
            var xValue=xSel[i].childNodes[0].firstChild.nodeValue;
            var xText=xSel[i].childNodes[1].firstChild.nodeValue;
            var option=new Option(xText,xValue);
            try{
                select_root.add(option);
            }catch(e){
            }
        }
    }
SCRIPT>
.
<td width="92" height="30">    <div align="center">专业选择div>td>
<td width="92" height="30"> <div align="center">
<SELECT id="spec" name="spec" onchange="Change_Select()">
<OPTION value="0">===请选择专业===OPTION>
<logic:iterate id="speclist" name="speclist">
<option value=""speclist" property="SId"/>">
<bean:write name="speclist" property="SName"/>
option>
logic:iterate>
SELECT>
div>td>
.
<td width="92" height="30"> <div align="center">工种选择div>td>
<td width="92" height="30"> <div align="center">
<SELECT id="worktype" name="worktype">
<OPTION value="0">===请先选择专业===OPTION>
SELECT>
div>td>

ACTION�Q?br />

response.setContentType("text/xml");
response.setHeader("Cache-Control","no-cache");
response.setCharacterEncoding("UTF-8");

response.getWriter().write(last_xml);

��d��一句代码：
response.setCharacterEncoding("UTF-8");
把原来的ISO-8859-1�~�码改�ؓUTF-8�Q�页面就能正常显�C�XML传回客户端的中文字符了�?br />
参考：Ajax中的responseText�~�码问题
ajax中文��q��

young 2006-10-24 13:15 发表评论

young — Mon, 08 May 2006 04:51:00 GMT

在系�l�启动，�W�一�ơ进入主��面的时候，要配�|�hibernate�Q?br />代码�Q?br />

     public static Session currentSession() throws HibernateException {
        Session session = (Session) threadLocal.get();

         if (session == null ) {
             if (sessionFactory == null ) {
                 try {
                    cfg.configure(CONFIG_FILE_LOCATION);
                    sessionFactory = cfg.buildSessionFactory();
                }
                 catch (Exception e) {
                    System.err.println( " %%%% Error Creating SessionFactory %%%% " );
                    e.printStackTrace();
                }
            }
            session = sessionFactory.openSession();
            threadLocal.set(session);
        }

         return session;
    }

当两个客��L��同时�q�入的时候，session = sessionFactory.openSession();会��生sessionFactory为NULL的错误�?br />原因�Q?br />多线�E�，当一个请求先�q�入�q�得到sessionFactory�Q�就作sessionFactory.openSession()�Q�这个执行是有一�D�|��间的�Q�同时第二个��h��也到来了直接��到sessionFactory.openSession()�q�一句，sessionFactory没初始化因此为NULL�?br />解决�Q?br />使该�Ҏ��同步synchronized�?img src ="http://www.aygfsteel.com/yyg1107/aggbug/44981.html" width = "1" height = "1" />

young 2006-05-08 12:51 发表评论

young — Thu, 13 Apr 2006 04:47:00 GMT

之前也碰见过用struts�?lt;html:select>标签出现昄��错误的问题！不过那时是重写一遍！
现在重写工作量更大，没法子，扑֐��Q?br />
............................
.

�l�于扑ֈ�了，的属性只能有property ,multiple ,size�Q�我加了个name �Q�于是就出错了！

�l�于解决了~�Q�！

young 2006-04-13 12:47 发表评论