日期:2014-05-18  浏览次数:20804 次

网页中实时显示数据库数据的问题?(应用了xmlhttp)
我应用xmlhttp写了一个实时显示数据的程序,由于初次使用,查了很多资料仍然不得要领,下面是我的代码,请大家看看,该怎么改,(数据库应用了hibernate)
dataread.jsp文件代码:
<%@page   contentType= "text/html;charset=GB2312 "%>
<%@page   language= "java "%>
<%@page   import= "java.util.* "%>
<%@page   import= "java.sql.* "%>
<%@page   import= "org.hibernate.Session "%>
<%@page   import= "org.hibernate.SessionFactory "%>
<%@page   import= "org.hibernate.cfg.Configuration "%>
<%@page   import= "org.hibernate.Query "%>
<%@page   import= "com.tianhe.dao.hbm.DCqttestdata "%>
<%@page   import= "com.tianhe.dao.hbm.DCqttestdataId "%>
<%@page   import= "com.tianhe.dao.hbm.DCqttestdataHome "%>

<!DOCTYPE   html   PUBLIC   "-//W3C//DTD   XHTML   1.0   Strict//EN "   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd ">

<html>
<head>
<title>
</title>
</head>
<body   bgcolor= "#ffffff ">
<script   type= "text/javascript ">
<%
        Configuration   conf=new   Configuration().configure();
        SessionFactory   sessionFactory   =   conf.buildSessionFactory();
        Session   s   =   sessionFactory.openSession();
        DCqttestdata   dcd   =new   DCqttestdata();
        Query   qr=s.createQuery( "from   DCqttestdata   as   dcqt   order   by   dcqt.id.revTime   desc ");
        String     sResult;
        if   (qr.list().size()> 0)
        {
            dcd=(DCqttestdata)qr.list().get(0);
        }
        sResult=dcd.getBsic()   +   "@@ "   +   dcd.getCellid()   +   "@@ "   +   dcd.getCh();
        out.print(sResult);
        //System.out.println(sResult);
%>
</script>
</body>
</html>


datadisplay.jsp代码
<%@page   contentType= "text/html;charset=GB2312 "%>
<%@page   language= "java "%>
<%@page   import= "java.util.* "%>
<%@page   import= "java.sql.* "%>
<!DOCTYPE   html   PUBLIC   "-//W3C//DTD   XHTML   1.0   Strict//EN "   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd ">

<html>
<head>
<title>
datadisplay
</title>
<script   type= "text/javascript ">
function   GetResult()
{
      try
      {
          //var   oBao   =   new   ActiveXObject( "Msxml2.XMLHTTP ");
          var   oBao   =   new   ActiveXObject( "Microsoft.XMLHTTP ");
          oBao.open( "GET ", "dataread.jsp ",false);
  &nbs