ognl

What is wrong with: <s:select list="fruits" name="fruitSelect" id="fruitSelect" listKey="fid" listValue="fname" headerKey="-1" headerValue="Pick a fruit!" /> Plenty of online examples use this value: http://www.coderanch.com/t/439139/Struts/wrong-select http://www.mkyong.com/struts2/struts-2-sselect-drop-down-box-example/ BUT the actual documentation (you can view this on the tooltip in Eclipse by hovering over the symbol) says Key for first item in list. Must not be empty! '-1' and '' is correct, '' is bad. -1 seems pretty logical to me and it shouldn't be a valid option anyway. " is correct,

What is the exact use of %{} notation in Struts 2? Can someone explain with a simple example where the code works when %{} is used and does not works when its not used? Used in OGNL to force evaluate the content in brackets as OGNL expression. For example <s:iterator value = "myAnswers" status="stat"> <s:textfield name = "myAnswers[%{#stat.index}].name"/> evaluation of the stat.index should be forced. 来源： https://stackoverflow.com/questions/18491659/struts-2-the-usage-of-notation

[/color]学习Struts2，一直不明白表单中的值是怎么传给Action的，上网查了些资料，基本了解了！下面基本是从几个人的BOLG转载过来，以后记不清了再来看~ [color=red]先看看我做的实验 jsp页面 Java代码 <s:form action= "hello/converter.action" method= "post" > <s:textfield name= "point" label= "点" ></s:textfield> <s:textfield name= "point2" label= "2" ></s:textfield> <s:textfield name= "point3" label= "3" ></s:textfield> <s:textfield name= "age" label= "年龄" ></s:textfield> <s:textfield name= "date" label= "日期" ></s:textfield> <s:submit name= "提交" ></s:submit> </s:form> 结果图（是通过<s:debug></s:debug>得到的） value stack： Stack context： 通过图中我们可以看到 valuestack中包括我传递的值（point，point2，point3

I have a form contains three buttons print / export / save . <s:form action="/userAction"> <s:submit type="image" value="%{'print'}" src="/print.png" /> <s:submit type="image" value="%{'export'}" src="/export.png" /> <s:submit type="image" value="%{'save'}" src="/save.png" /> </s:form> How can I map this in struts.xml ? In the struts.xml the action is mapped via the <action tag <action name="userAction" class="... the submit buttons should include method attribute to call corresponding methods of the action <s:submit type="image" value="%{'print'}" src="/print.png" method="print" /> <s:submit

I am using SSH2. When I try to got an attribute with <%=session.getAttribute("username") %> , it was just right. But when I tried to get the same attribute with <s:property value="#session.username" /> , I got nothing. Why? Aren't they the same? And when I used the <s:debug> , I got these: Servlet.service() for servlet jsp threw exception org.hibernate.LazyInitializationException: could not initialize proxy - no Session at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:167) at org.hibernate.proxy.AbstractLazyInitializer.getImplementation