Struts - Struts提供的.tld JSP页面中的Taglib指令

Question

我正在开发一个Struts基础应用程序.我是Struts的新手.我想使用html的标签,在所提供的标签库目录规定Struts,在一个JSP页面.

但不知道如何使用它.我知道如何使用taglib指令,但我从源代码中了解到.tld文件已经嵌入1.2.8版之后的.jar文件中.我使用的是Struts 2.1.8版.

我不知道该struts-html.tld文件位于哪个.jar文件中.

Answer 1

我在这个例子中使用Struts 1.3.10:

1. 在这里下载最新的struts库(http://struts.apache.org/download.cgi#struts1310).请记住,Full Distribution是您必须下载的内容,因为它包含带有Struts TLD的war文件.
2. 在Web应用程序中,将下载的存档文件中的所有lib复制到/WEB-INF/lib文件夹中.
3. 对于JSTL库(适用于struts),请访问此处(http://java.sun.com/products/jsp/jstl/)
4. 获得Struts TLD和JSTL Tld之后,将它们放在/WEB-INF/tld/文件夹下(它必须位于/ WEB-INF /文件夹中).

5. 在web.xml上添加以下内容(在<web-app>元素下)

     <jsp-config>
       <taglib>
           <taglib-uri>/WEB-INF/struts-bean.tld</taglib-uri>
           <taglib-location>/WEB-INF/tld/struts-bean.tld</taglib-location>
       </taglib>
       <taglib>
           <taglib-uri>/WEB-INF/struts-html.tld</taglib-uri>
           <taglib-location>/WEB-INF/tld/struts-html.tld</taglib-location>
       </taglib>
       <taglib>
           <taglib-uri>/WEB-INF/struts-logic.tld</taglib-uri>
           <taglib-location>/WEB-INF/tld/struts-logic.tld</taglib-location>
       </taglib>
       <taglib>
           <taglib-uri>/WEB-INF/struts-nested.tld</taglib-uri>
           <taglib-location>/WEB-INF/tld/struts-nested.tld</taglib-location>
       </taglib>
       <taglib>
           <taglib-uri>/WEB-INF/struts-tiles.tld</taglib-uri>
           <taglib-location>/WEB-INF/tld/struts-tiles.tld</taglib-location>
       </taglib>
       <taglib>
           <taglib-uri>/WEB-INF/sslext.tld</taglib-uri>
           <taglib-location>/WEB-INF/tld/sslext.tld</taglib-location>
       </taglib>
       <taglib>
           <taglib-uri>/WEB-INF/struts-layout.tld</taglib-uri>
           <taglib-location>/WEB-INF/tld/struts-layout.tld</taglib-location>
       </taglib>
   
       <!-- Sun's JSTL -->
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/fn</taglib-uri>
           <taglib-location>/WEB-INF/tld/fn.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/fmt</taglib-uri>
           <taglib-location>/WEB-INF/tld/fmt.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/fmt-1-0</taglib-uri>
           <taglib-location>/WEB-INF/tld/fmt-1_0.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/fmt-rt</taglib-uri>
           <taglib-location>/WEB-INF/tld/fmt-rt.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/fmt-1-0-rt</taglib-uri>
           <taglib-location>/WEB-INF/tld/fmt-1_0-rt.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/core</taglib-uri>
           <taglib-location>/WEB-INF/tld/c.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/core-1-0</taglib-uri>
           <taglib-location>/WEB-INF/tld/c-1_0.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/core-rt</taglib-uri>
           <taglib-location>/WEB-INF/tld/c-rt.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/core-1-0-rt</taglib-uri>
           <taglib-location>/WEB-INF/tld/c-1_0-rt.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/sql</taglib-uri>
           <taglib-location>/WEB-INF/tld/sql.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/sql-1-0</taglib-uri>
           <taglib-location>/WEB-INF/tld/sql-1_0.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/sql-rt</taglib-uri>
           <taglib-location>/WEB-INF/tld/sql-rt.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/sql-1-0-rt</taglib-uri>
           <taglib-location>/WEB-INF/tld/sql-1_0-rt.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/x</taglib-uri>
           <taglib-location>/WEB-INF/tld/x.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/x-1-0</taglib-uri>
           <taglib-location>/WEB-INF/tld/x-1_0.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/x-rt</taglib-uri>
           <taglib-location>/WEB-INF/tld/x-rt.tld</taglib-location>
       </taglib>
   
       <taglib>
           <taglib-uri>http://java.sun.com/jstl/x-1-0-rt</taglib-uri>
           <taglib-location>/WEB-INF/tld/x-1_0-rt.tld</taglib-location>
       </taglib>
   </jsp-config>
   

这告诉您,一旦从JSP调用TLD,您的webapp将查找匹配项,<taglib-uri>然后查找其位置<taglib-location>并找到要调用的相关类.

在JSP上,现在可以这样做:

<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<%@ taglib uri="/WEB-INF/struts-layout.tld" prefix="layout"%>
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jstl/fmt" prefix="fmt" %>
<%@ taglib uri="http://java.sun.com/jstl/fn" prefix="fn" %>

希望这可以帮助.