Eclipse在jar文件中找不到TLD
[英]Eclipse cannot find tld inside jar file
问题描述
I have a jar file that contains some tag-files. 
我有一个包含一些标记文件的jar文件。
My *.tag files are inside /META-INF/tags/ folder (jar) 我的*.tag文件位于/META-INF/tags/文件夹（jar）中
I also have a mytags.tld inside /META-INF/ folder (jar) 我在/META-INF/文件夹（jar）中也有一个mytags.tld
After pack all war project (with mytags.jar inside WEB-INF/lib folder), it works fine in JBoss. 打包所有war项目（在WEB-INF/lib文件夹中带有mytags.jar ）之后，它在JBoss中可以正常工作。 But Eclipse still cannot recognize the tag, getting the error Can not find the tag library descriptor for "http://www.mycompany.com" 但是Eclipse仍然无法识别标签，并得到错误消息： Can not find the tag library descriptor for "http://www.mycompany.com"
Is there a way to Eclipse recognize my tags? 有没有办法让Eclipse识别我的标签？
follow the sources: 遵循来源：
block.tag block.tag
<%@tag description="Item do block" pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@attribute name="id" required="true" %>
<%@attribute name="label" required="true" %>
<%@attribute name="description" required="false" %>
<%@attribute name="icon" required="false" %>
<div id="${id}" class="block">
<div class="block-box ${icon}">
<div class="label">
<span>${label}</span>
</div>
<div class="description">
${description}
<jsp:doBody></jsp:doBody>
</div>
</div>
</div>
mytags.tld mytags.tld
<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"
version="2.1">
<description>My Tags</description>
<display-name>MyTags</display-name>
<tlib-version>1.0</tlib-version>
<short-name>mytags</short-name>
<uri>http://www.mycompany.com</uri>
<tag-file>
<name>block</name>
<path>/META-INF/tags/block.tag</path>
</tag-file>
</taglib>
some.jsp some.jsp
<%@page contentType="text/html; charset=ISO-8859-1" pageEncoding="UTF-8" %>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@taglib uri="http://www.mycompany.com" prefix="mytags" %> <-- ECLIPSE MARKS ERROR HERE
<!DOCTYPE html>
<html>
<head>
<title>Test</title>
</head>
<body>
<mytags:block id="users" label="Users" icon="user">
<!-- some content -->
</mytags:block>
</body>
</html>
But everything works fine in JBoss. 但是在JBoss中一切正常。 Only eclipse accuses error. 只有日食指责错误。
Thanks 谢谢
1 个解决方案
解决方案1
1 2016-03-30 23:37:40
An existing bug report https://bugs.eclipse.org/bugs/show_bug.cgi?id=330405 suggests correcting the error message to point to the JSP version 1.1 detected from web.xml as a reason for the outdated interpretation of the taglib URI. 现有的错误报告https://bugs.eclipse.org/bugs/show_bug.cgi?id=330405建议更正错误消息，使其指向从web.xml检测到的JSP 1.1版，这是对taglib进行过时解释的原因URI。
This is confirmed by a JSP Tag Libraries document, http://docs.oracle.com/cd/B14099_19/web.1012/b14014/taglibs.htm#i1014427 : 这由JSP标记库文档http://docs.oracle.com/cd/B14099_19/web.1012/b14014/taglibs.htm#i1014427确认 ：
As first defined in the JSP 1.1 specification, the taglib directive of a JSP page can fully specify the name and physical location, within a WAR file structure, of the TLD file that defines a particular tag library, as in the following example:
<%@ taglib uri="/WEB-INF/oracustomtags/tlds/mytld.tld" prefix="oracust" %>
[..] Alternatively, as also defined since the JSP 1.1 specification, the taglib directive can specify the name and application-relative physical location of a JAR file instead of a TLD file
Both of the above 2 conventions retired to a fallback mechanism since JSP 1.2 which introduced mapping tag definitions and uses through the arbitrary taglib uri strings, http://docs.oracle.com/cd/B14099_19/web.1012/b14014/taglibs.htm#i1013109 . 自从JSP 1.2引入了映射标记定义并通过任意taglib uri字符串http://docs.oracle.com/cd/B14099_19/web.1012/b14014/taglibs使用以来，上述两种约定都已退回到一种后备机制。 htm＃i1013109 。
A recent JSP 2.1 spec documents the URI mapping in section JSP.7.3.2: 最新的JSP 2.1规范在JSP.7.3.2部分记录了URI映射：
The URI describing a tag library is mapped to a TLD resource path though a taglib map, and a fallback interpretation that is to be used if the map does not contain the URI.
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