struts2�?lt;s:if>标签如何判断单个字符?(Why won't the 'if' tag evaluate a one char string)

三刀��の逆风 — Mon, 05 Oct 2009 02:55:00 GMT

If care is not taken with the quoting of literals, the expression language (OGNL) will misinterpret a char as a String. Wrong: Why doesn't this work when myString is equal to A? The solution is simple: flip the double and single quotes. Right: This works! Another solution is to escape the double quotes in the String. Also Right: This works too! 来自官方的FAQ�Q? http://struts.apache.org/2.x/docs/why-wont-the-if-tag-evaluate-a-one-char-string.html

三刀��の逆风 2009-10-05 10:55 发表评论

Struts中应用showModalDialog(模式�H�口)

三刀��の逆风 — Thu, 06 Apr 2006 08:43:00 GMT

// 讑֮�兛_��H�口的开�?/span>
request.setAttribute( " close " , " NO " );

通常我们在开发WEB应用时会用到showModalDialog(模式�H�口)来增加或修改记录,而应用或讄��不当时会造成��d�@环或��面��{错误�Q�以下对我在Struts上应用showModalDialog(模式�H�口)时实现方法描�q�ͼ�
　　应用的情况：
　　1.在目录树的右键单上选新增，弹出新增�H�口--showModalDialog(模式�H�口)�?br />　　2.录入数据后submit�Q�调用Action保存数据�?br />　　3.在Action判断保存是否出错�Q�出错时�q�回新增�H�口提示错误�Q�成功后关闭弹出的新�H�口�q�刷新父��面的分�c�L��?/p>

代码��写如下：
目录树页面：

< A HREF ="javascript: addTree();" > 新增节点 A >
< SCRIPT language ='JavaScript' type ='text/javascript' >
function addTree(){
   // 用于准备新增��面所需的元素准�?/span>
   var URL = " treeAction.do?method=add&parentid= " ;
   if (d.getSelected() == null ){
   URL = URL + ' 0 ';
  } else {
   URL = URL + tree.getSelected();
  }
   // alert(URL);
  window.showModalDialog(URL,window, " center:true; " );
}　
SCRIPT >

新增��面--showModalDialog(模式�H�口)�Q?br />

<% @ include file = " /include/jsp/taglib.jsp " %>

< logic:equal name ="close" value ="OK" >
       < script language ="javascript" >

     script >
logic:equal >

DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" >
< html:html lang ="true" >
   < head >
     < html:base target ="_self" />
     < title > Add Form title >
     < meta http-equiv ="pragma" content ="no-cache" >
     < meta http-equiv ="cache-control" content ="no-cache" >
     < meta http-equiv ="expires" content ="0" >
     < meta http-equiv ="description" content ="cate edit" >

   head >

   < body >
   < html:errors />

    < html:form action ="/treeAction.do?method=update" method ="post" >
     < html:hidden property ="parentid" />
       < table border ="0"   align ="center" >
         < tr >
           < td >< bean:message bundle ="ar1" key ="catename" /> : td >
           < td >
             < html:text property ="catename" />

           td >
         tr >
         < tr > tr >
         < tr >
           < td align ="center" >< html:submit >< bean:message bundle ="ar1" key ="button.save" /> html:submit > td >
           < td align ="center" >< html:button property ="button" onclick ="javascript:window.close();" >< bean:message bundle ="ar1" key ="button.cancel" /> html:button > td >
         tr >
       table >
     html:form >
   body >
html:html >

最后在Action中判断新增是否成�?成功则：

// 讑֮�兛_��H�口的开�?/span>
request.setAttribute( " close " , " OK " );

否则�Q?/p>

// 讑֮�兛_��H�口的开�?/span>
request.setAttribute( " close " , " NO " );

三刀��の逆风 2006-04-06 16:43 发表评论

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struts2�?lt;s:if>标签如何判断单个字符?(Why won't the 'if' tag evaluate a one char string)

Struts中应用showModalDialog(模式�H�口)