创建接缝自定义EL功能的错误

Question

我试图通过关注 http://seamframework.org/documentation/creatingingingingingingcustomelfunctions

taglib内容是：

<?xml version="1.0"?>
<!DOCTYPE facelet-taglib PUBLIC "-//Sun Microsystems, Inc.//DTD Facelet Taglib 1.0//EN" "facelet-taglib_1_0.dtd">
<facelet-taglib>
     <library-class>org.el.func.FnLibrary</library-class>
</facelet-taglib>

但是在运行时，会遇到以下解析错误。

SEVERE [compiler] Error Loading Library: vfszip:/home/anand/jboss-5.1.0.GA/server/default/deploy/stagebitz.ear/stagebitz.jar/META-INF/elfunctions.taglib.xml
java.io.IOException: Error parsing [vfszip:/home/anand/jboss-5.1.0.GA/server/default/deploy/stagebitz.ear/stagebitz.jar/META-INF/elfunctions.taglib.xml]: 


Caused by: org.xml.sax.SAXException: Error Handling [vfszip:/home/anand/jboss-5.1.0.GA/server/default/deploy/stagebitz.ear/stagebitz.jar/META-INF/elfunctions.taglib.xml@4,57] <library-class>

at com.sun.facelets.compiler.TagLibraryConfig$LibraryHandler.endElement(TagLibraryConfig.java:271)

在Web.xml中使用以下参数中使用JSF 1.2

。

 <context-param>
      <param-name>javax.faces.FACELETS_LIBRARIES</param-name>
      <param-value>
        /WEB-INF/elfunctions.taglib.xml
    </param-value>
   </context-param>

Answer 1

绘制Isempty的示例：

<!DOCTYPE facelet-taglib PUBLIC
        "-//Sun Microsystems, Inc.//DTD Facelet Taglib 1.0//EN"
        "http://java.sun.com/dtd/facelet-taglib_1_0.dtd">
<facelet-taglib>
     <namespace>yournamespace</namespace>
    <function>
        <function-name>functionname</function-name>
        <function-class>fullclanmae</function-class>
        <function-signature>java.lang.Boolean isEmpty(java.util.Set)</function-signature>
    </function>
</facelet-taglib>

将其放入您的classpath，它将与web.xml中的任何东西一起使用