Struts标签库

一、概述

 1.JSP文件中添加代码： <%@ taglib prefix="s" uri="/struts-tags" %>

2.OGNL

   必须在struts中使用。

  List集合 ：{s1,s2,s3,...}

  Map集合 ：#{key1:value1,key2:value2,...}

二、控制标签

1.

<s:if test=" 表达式">
标签体
</s:if>
<s:elseif test="表达式">
标签体
</s:elseif>
<s:else test="表达式">
标签体
</s:else>

2.

<s:append var="newlist">
     <s:param value=""/>
     <s:param value=""/>
</s:append>
<s:iterator value="%{#newlist}" id="lst">
     <s:property value="lst"/>
</s:iterator>

3.

<s:generator var=" " val=" " count=" " converter=" " separator=" ">  <pre name="code" class="java">     <s:iterator>

<s:property />

     </s:iterator>

</s:generator>

4.

<s:iterator var=" " value=" " begin=" " step=" " end=" " status=" " />

5.

<s:merge var="newlist">
     <s:param value=""/>
     <s:param value=""/>
</s:merge>
<s:iterator value="%{#newlist}" id="lst">
     <s:property value="lst"/>
</s:iterator>

6.

必须自定义实现了java.util.Comparator接口的类

<s:sort var=" " source=" " Comparator=" " />

7.

自定义的截取类实现的接口： org.apache.struts2.util.SubsetIteratorFilter.Decider

<s:subset var=" " source=" " start=" " count=" " decider=" " />

8.

三、数据标签

1.

<s:a id=" " href=" " action=" " method=" " namespace=" " />

2.

<s:action var=" " name=" " executeResult=" " flush=" " ignoreContextParams=" " namespace=" " />

3.

<s:bean var=" " name=" " />

4.

<s:date var=" " name=" " nice=" " format=" " />

5.

<s:debug />

6.

<s:i18n name=" " />    !!资源绑定

7.

<s:include id=" " value=" ">
   <s:param name=" " value=" " />
</s:include>

8. <s:param>

9.

<s:property value=" " default=" " />    !!输出ValueStack中的值

10.

<s:push value=" " />     !!将一个值放到ValueStack栈顶

11.

<s:set var=" " value=" " scope=" " />       !!将某个值放入指定范围内

12.

<s:text var=" " name=" " searchValueStack=" " />    !!输出国际化资源文件信息

13.

<s:url var=" " action|value=" " method=" " namespace=" " />     !!映射地址

四、表单标签

1.

<s:form action=" " namespace=" " />

2.

<s:submit action=" " method=" " />

3.

<s:checkbox name=" " label=" " value="true/false" fieldValue=" " />

4.

<s:checkboxlist name=" " label=" " list=" " listKey=" " listValue=" " />

5.

<s:combobox name=" " label=" " list=" " headerKey=" " headerValue=" " emptyOption=" " value=" "/>

6.

<s:doubleselect name=" " list=" " listKey=" " listValue=" " label=" "
                doubleName=" " doublelist=" " doubleListKey=" " doubleListValue=" " multiple=" " />

7.

<s:head />

8.

<s:file name=" " accept=" " />

9.

<s:hidden neme=" " value=" " />    !!主要用来需要提交表单传值时使用

10

<s:inputtransferselect name=" " label=" " list=" " listKey=" " listValue=" " multiple=" "
                      upLabel=" " downLabel=" " addLabel=" " removeLabel=" " removeAllLabel=" " 
                      allowMoveUp=" " allowMoveDown=" " />

11.

<s:label name=" " value=" " />

12.

<s:optiontransferselect label=" " leftTitle=" " rightTitle=" " name=" "
      list=" " listKey=" " listValue=" " headerKey=" " headerValue=" " mutiple=" " emptyOption=" "
  doubleList=" " doubleListKey=" " doubleListValue=" " doubleHeaderKey=" " doubleHeaderValue=" " doubleMutiple=" "/>

13.

<s:select name=" " label=" " list=" " listKey=" " listValue=" " headerKey=" " headerValue=" " />

14.

<s:optgroup label=" " list=" " listKey=" " listValue=" " />  
!!通常放在<s:select>标签中用于生成一个下拉列表框的选项组

15.

<s:password name=" " label=" " size=" " maxlength=" " />

16.

<s:radio name=" " label=" " list=" " listKey=" " listValue=" " />

17.

<s:reset name=" " value=" " />

18.

<s:textarea name=" " value=" " rows=" " cols=" " />
<s:textfield name=" " value=" " />

19.

<s:token />   !!生成HTML中含有一个隐藏域，value属性值提交后放入session中，

须在struts.xml中配置拦截器如下：

<action name=" " class=" ">
  <!--配置拦截器-->
  <interceptor-ref name="defaultStack" />
  <interceptor-ref name="token" />
  <!--返回结果-->
  <result name="invalid.token">/error.jsp</result>
  <result>/success.jsp</result>
</action>

20.

<s:updownselect name=" " list=" " listKey=" " listValue=" " headerKey=" " headerValue=" " emptyOption=" "
              moveUpLabel=" " moveDownLabel=" " selectAllLabel=" " />

五、非表单标签

   输出在Action中封装的信息

1.

<s:actionerror />    !!输出Action实例中getActionError()的返回值

2.

<s:actionmessager />  !!输出Action实例中getActionMessage()的返回值

3.

<s:component />  !!用来使用自定义标签、模板、主题等

4.

<s:div id=" " class=" " />

5.

<s:fielderror />  !!输出Action中的fieldErrors属性保存的字段错误。

最后

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