2. 减少使用Ognl表达式，最好用FreeMaker代替JSP
3. 关闭logging和devMode
4. Struts.xml中删除不需要的拦截?
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Weblogic 10下JSP el与ognl的问题与解决Ҏ
admin发布?010-05-06 10:17 | 142ơ阅?/font>
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English Title:Weblogic 10 leaves the problem of JSP El and Ognl and means of settlement |
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1.一个value stack本质上是一个List;
2.在栈中调用[n]返回一个从位置n开始的子栈;
对于2举个例子说明。假定Value Stack包含了[model,action,others]Q那?/p>
[0] --- q回 [model,action,others]Q?
[1] --- q回 [action,others]Q?
[2] --- q回 [others];
现在开始介ls:iterator的一些用。以下代码片D均在开发环境eclipse3.4 wtp、tomcat5.5、jdk5上用struts2.1.6试通过?/p>
1) 、访?days
defined List<String> days ["Monday","Thursday","Friday","Sunday"]
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<s:iterator value="days"><s:property /></s:iterator>
<s:iterator value="days"><s:property /></s:iterator>
2) 、?top 关键字?qo掉Monday)
defined List<String> days ["Monday","Thursday","Friday","Sunday"]
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<s:iterator value="days">
<s:if test="top!='Monday'">
<s:property />
</s:if>
</s:iterator>
<s:iterator value="days">
<s:if test="top!='Monday'">
<s:property />
</s:if>
</s:iterator>
top 指代当前q代元素Q可以ؓ对象Q?
q里的top可用[0].top替代Q但不能使用[0]。[0]代表整个栈对象。如果单U调用[0]会调用其toString()Ҏ输出对象信息Q?/p>
3)、?last / first 关键字?/strong>
defined String[][] aTs = { { "一", "?, "?, "? },{ "一一", "二二", "三三", "四四"} };
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<!--遍历二维数组QThe trick here is to use 'top' as the value for the inner iterator-->
<s:iterator value="aTs" status="of">
<s:if test="#of.last"><br/></s:if>
<s:iterator value="top">
<!--亦可用[0].top替代。如果单U用[0],则会同时打印该处栈对象信?->
<s:property />
</s:iterator>
</s:iterator>
<!--遍历二维数组QThe trick here is to use 'top' as the value for the inner iterator-->
<s:iterator value="aTs" status="of">
<s:if test="#of.last"><br/></s:if>
<s:iterator value="top">
<!--亦可用[0].top替代。如果单U用[0],则会同时打印该处栈对象信?->
<s:property />
</s:iterator>
</s:iterator>
iterator 标签中的status属性代表当前P代的位置Q?
#of.last用于判断当前是否跌到的最后一个元素；
lastq回一个booleancd;
first q回一个booleancd;
4)、?odd / even 关键?/strong>
下面的例子要实现每行输出颜色不同的效果?/p>
defined List<String> days ["Monday","Thursday","Friday","Sunday"]
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<!--奇数行显CZؓU色,偶数行显CZؓl色-->
<s:iterator value="days" status="offset">
<s:else>
<s:if test="#offset.odd==true">
<li style="color: red" mce_style="color: red"><s:property /></li>
</s:if>
<s:else>
<li><s:property /></li>
</s:else>
</s:else>
</s:iterator>
<!--奇数行显CZؓU色,偶数行显CZؓl色-->
<s:iterator value="days" status="offset">
<s:else>
<s:if test="#offset.odd==true">
<li style="color: red" mce_style="color: red"><s:property /></li>
</s:if>
<s:else>
<li><s:property /></li>
</s:else>
</s:else>
</s:iterator>
odd关键字用来判断当前P代位|是否ؓ奇数行。oddq回booleancd;
evne关键字用来判断当前P代位|是否ؓ偶数行。evenq回booleancd
5)、ȝ下，当声明iterator的status属性时Q通过#statusName.method 可以使用以下Ҏ:
even : boolean - 如果当前q代位置是偶数返回true
odd : boolean - 如果当前q代位置是奇数返回true
count : int - q回当前q代位置的计??开?
index : int - q回当前q代位置的编??开?
first : boolean - 如果当前q代位置是第一位时q回true
last : boolean - 如果当前q代位置是最后一位时q回true
modulus(operand : int) : int - q回当前计数(?开?与指定操作数的模?
6)、最后再来看下在iterator中调用value stack的用法?/strong>
假定countries是一个List对象Q每一个country有一个name属性和一个citys List对象Qƈ且每一个city也有一个name属?。那么我们想要在q代cities是访问countries的name属性就的用如下方式Q?/p>
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<s:iterator value="countries">
<s:iterator value="cities">
<s:property value="name"/>, <s:property value="[1].name"/><br>
</s:iterator>
</s:iterator>
<s:iterator value="countries">
<s:iterator value="cities">
<s:property value="name"/>, <s:property value="[1].name"/><br>
</s:iterator>
</s:iterator>
q里?<ww:property value="name"/>取的是ctiy.name;<ww:property value="[1].name"/>取得是country.name
<ww:property value="[1].name"/> {h?<ww:property value="[1].top.name"/>
we refer to a specific position on the stack: '[1]'. The top of the stack, position 0, contains the current city, pushed on by the inner iterator; position 1 contains the current country, pushed there by the outer iterator.(city处于当前栈，即top或者[0],而[1]指明了外层iterator对象Q即country)
'[n]'标记引用开始位|ؓn的子栈（sub-stackQ，而不仅仅是位|n处的对象。因?[0]'代表整个栈，?[1]'是除top对象外所有的栈元素?
转蝲出处Qhttp://blog.csdn.net/oxcow/archive/2009/09/03/4516283.aspx
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需要在JSP?lt;%%>java代码D中直接讉K值栈内容,而不使用<s:property value="name"/>获取Q?br /> 可以通过如下方式q行:
String name = (String)ActionContext.getContext().getValueStack().findValue( "name" ); Z正常q行Q还需要在jsp这com.opensymphony.xwork.ActionContext cd?/p>
<%@ page import= "com.opensymphony.xwork.ActionContext" %> ]]>
<s:datetimepicker id="time1" name="time1" toggleType="explode" value="today" /> <s:datetimepicker id="time2" name="time2" toggleType="explode" value="today" />
我们在javascript中可以通过以下方式d和赋?/p>
var time1= dojo.widget.byId("time1");var stringtime1 = time1.getValue();//dvar time2= dojo.widget.byId("time2");time2.setValue(stringtime1 ); //赋?/span>以上代码Q取出time1中的|赋给time2
Struts2 API中的一个例?
Examples:
<s:datetimepicker name="order.date" label="Order Date" /><s:datetimepicker name="delivery.date" label="Delivery Date" displayFormat="yyyy-MM-dd" /><s:datetimepicker name="delivery.date" label="Delivery Date" value="%{date}" /><s:datetimepicker name="delivery.date" label="Delivery Date" value="%{'2007-01-01'}" /><s:datetimepicker name="order.date" label="Order Date" value="%{'today'}"/>Getting and getting the datetimepicker value, from JavaScript:
<s:datetimepicker id="picker" label="Order Date" /><script type="text/javascript">
function setValue() {
var picker = dojo.widget.byId("picker"); //string value picker.setValue('2007-01-01'); //Date value picker.setValue(new Date());
} function showValue() { var picker = dojo.widget.byId("picker"); //string value var stringValue = picker.getValue(); alert(stringValue); //date value var dateValue = picker.getDate(); alert(dateValue); }</script>
Publish topic when value changes:
<s:datetimepicker id="picker" label="Order Date" valueNotifyTopics="/value"/><script type="text/javascript">dojo.event.topic.subscribe("/value", function(textEntered, date, widget){ alert('value changed'); //textEntered: String enetered in the textbox //date: JavaScript Date object with the value selected //widet: widget that published the topic });</script>
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