Error in my taglib | 易学教程

问题

When I developed my portlet and when i wrote my jsp page I used:

<%@ taglib prefix="portlet" uri="http://java.sun.com/portlet_2_0"%>

but eclipse show me an error telling me that it cannot find the tag lib descriptor for http://java.sun.com/portlet_2_0.

How can I resolve this issue wihtout using tld files ?

回答1:

In my case, I am using Liferay Portal, so in order to avoid this error I changed:

<%@ taglib uri="http://java.sun.com/portlet_2_0"% prefix="portlet">

<%@ taglib uri="/WEB-INF/tld/liferay-portlet.tld" prefix="portlet" %>

and in file "WEB-INF/liferay-plugin-package.properties"; I added this line

portal-dependency-tlds=/WEB-INF/tld/liferay-portlet.tld

which is suggested by a Liferay staff (Link)

回答2:

Remove the line

<%@ taglib uri="http://java.sun.com/portlet_2_0"% prefix="portlet">

and paste this line:

<%@taglib uri="http://java.sun.com/portlet" prefix="portlet"%>

Then, in WEB-INF/tld folder put these files: aui.tld, liferay-portlet.tld, liferay-portlet-ext.tld, liferay-security.tld, liferay-theme.tld, liferay-ui.tld, liferay-util.tld.

回答3:

You can download portlet-2.0.jar and add it to your project path. But if you are developping for Liferay I would recommand you to use the liferay-portlet.tld which has the portlet 2.0 specification.

回答4:

If you add this to the web.xml in the WEB-INF folder it will remove the Eclipse error message.

<web-app>
    <taglib>
        <taglib-uri>http://java.sun.com/portlet_2_0</taglib-uri>
        <taglib-location>/WEB-INF/tld/liferay-portlet.tld</taglib-location>
    </taglib>
</web-app>

Hope it helps.

回答5:

This error just means that Eclipse is unable to find a tag library descriptor (TLD) that resolves the given (http://java.sun.com/portlet_2_0) tag URI. You can download the TLD corresponding to your portal container (Gatein, Pluto, Liferay, etc) from GitHub and place it in WEB-INF folder. Gatein specific tld can be found here. Also, make sure that you have the portlet_2.0 jar in your project path.

来源：https://stackoverflow.com/questions/13991799/error-in-my-taglib-taglib-prefix-portlet-uri-http-java-sun-com-portlet

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