Apache Tiles 2.2.2 将值从 tiles-config.xml 传递到 JSP

Question

除了某些页面 header 的右侧有一些选项外，我在所有页面中都有一个通用的 header。例如，我的 header 的右侧将有如下选项：Block、Compose、Edit，具体取决于页面。可以从 tiles-config.xml 设置此 headerShowIcons，然后在 rhsHeader.jsp 中使用它。

有什么方法可以将一些值从 tiles-config.xml 传递到 rhsHeader.jsp 并基于该值我想显示选项（即阻止、编辑或删除）

示例：如果我想向用户显示 Compose 选项，我只需从 tiles-config.xml 传递值（即 headerShowIcons='compose'）并使用它在 JSP。如果我想显示 Block，我将传递 headerShowIcons='block'，它将被 rhsHeader.jsp 读取以提供显示 Block 选项。我希望这会更清楚

tiles-config.xml

<definition name="*/*/*/*/*/index" template="/{1}/{2}/xyz/{4}/layouts/layout.jsp">
    <put-attribute name="lhsHeader" value="/{1}/{2}/xyz/s/headerWithBack.jsp" />
    <put-attribute name="rhsHeader" value="/{1}/{2}/xyz/s/rhsHeader.jsp"/>
    <put-attribute name="body" value="/{1}/{2}/xyz/s/myProfile.jsp" />
</definition>

layout.jsp

<!-- What should I add here to meet the requirement -->  
 <body>
   <header> 
      <div>
        <tiles:insertAttribute name="header"/>
        <tiles:insertAttribute name="rhsHeader"/>   
       </div>
   </header>
    <div>
       <tiles:insertAttribute name="body"/>
   </div>
  </body>

rhsHeader.jsp 是这样的:

 <tiles:useAttribute name="headerShowIcons" />
 <div class="RHS">
<ul>
<!-- I want to show the options (like- Block,Delete,etc) which will be passed from tiles-config.xml to rhsHeader.jsp (which here I have written it as headerShowIcons )-->
    <c:choose>
        <c:when test="${headerShowIcons  eq 'refine'}">
            <li><a href="#" class="refine">Refine</a></li>
        </c:when>
        <c:when test="${headerShowIcons  eq 'block'}">
            <li><a href="#" class="block">Block</a></li>
        </c:when>
        <c:when test="${headerShowIcons  eq 'edit'}">
            <li><a href="javaScript:void(0);" class="edit">Edit</a></li>
        </c:when>
        <c:when test="${headerShowIcons  eq 'delete'}">
            <li><a href="javaScript:void(0);" class="delete">Delete</a></li>
        </c:when>
        <c:otherwise>
                 <p>test</p>
        </c:otherwise>
    </c:choose>
</ul>

Answer 1

我会选择不同的方式，但如果这是你想要的，请看下面

tiles-config.xml

<tiles-definitions>
    <definition name="app.base" template="/WEB-INF/views/default/default.jsp">
        <put-attribute name="title" value="Not Found" />
        <put-attribute name="headerShowIcons" value="" />
        <put-attribute ..........>  
    </definition>
    <definition name="home" extends="app.base">
        <put-attribute name="title" value="Home Page" />
        <put-attribute name="headerShowIcons" value="edit" />   
        <put-attribute ..........>  
    </definition>
</tiles-definitions>

home.jsp

<c:set var="var"><tiles:insertAttribute name="headerShowIcons"/></c:set>

<c:choose>
    <c:when test="${'refine' == var}">
          <li><a href="#" class="refine">Refine</a></li>
    </c:when>
    <c:when test="${'block' == var}">
        <li><a href="#" class="block">Block</a></li>
    </c:when>
    <c:when test="${'edit' == var}">
        <li><a href="javaScript:void(0);" class="edit">Edit</a></li>
    </c:when>
    <c:when test="${'delete' == var}">
        <li><a href="javaScript:void(0);" class="delete">Delete</a></li>
    </c:when>
    <c:otherwise>
         <p>test</p>
    </c:otherwise>
</c:choose>

如果您愿意，可以将其移至 layout.jsp 并相应地显示您的 headers

Answer 2

我终于找到了解决方案，我相信它可能对有这种需求的人有所帮助：

我们将不得不使用

在headerLayout.jsp

<tiles:useAttribute name="whatToShow"/>
  <header> 
    <div>
      <tiles:insertAttribute name="lhsHeader" />
      <tiles:insertAttribute name="rhsHeader">
          <tiles:putAttribute name="whatToShow">${whatToShow}</tiles:putAttribute> 
        </tiles:insertAttribute>
    </div>
   </header>
 <div>
     <tiles:insertAttribute name="body"/>
 </div>

在tiles-config.jsp

 <definition name="Header.*" template="/{1}/layouts/headerLayout.jsp">
    <put-attribute name="lhsHeader" value="/s/headerWithBack.jsp"/>
    <put-attribute name="rhsHeader" value="/s/rhsHeader.jsp"/>  
    <put-attribute name="body" value=""/>
    <put-attribute name="whatToShow" value="block" type="string"/>
</definition>
<!-- inside the definition under whatToShow, I just write whatever value(block,edit,delete,etc) I want to pass to the rhsHeader.jsp -->

在rhsHeader.jsp

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<tiles:useAttribute name="whatToShow"/>
<div class="RHS">
<ul>
    <c:choose>
        <c:when test="${whatToShow  eq 'refine'}">
            <li><a href="#" class="refine">Refine</a></li>
        </c:when>
        <c:when test="${whatToShow  == 'block'}">
            <li><a href="#" class="block">Block</a></li>
        </c:when>
        <c:when test="${whatToShow  eq 'edit'}">
            <li><a href="javaScript:void(0);" class="edit">Edit</a></li>
        </c:when>
        <c:when test="${whatToShow  eq 'delete'}">
            <li><a href="javaScript:void(0);" class="delete">Delete</a></li>
        </c:when>
        <c:otherwise>
                 <p></p>
        </c:otherwise>
    </c:choose>
  </ul>
</div>

PS : 我使用了 whatToShow 而不是 headerShowIcons

Apache Tiles 2.2.2 将值从 tiles-config.xml 传递到 JSP

Apache Tiles 2.2.2 Pass value from tiles-config.xml to JSP

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