Problem in comment out a JSF tag:
We can html comment
for commenting a JSF tag. But the problem here is that JSF still process the value expression and tag will appear in generated HTML.
JSF Comment:
<!--
<h:commandButton type="button" value="#{msg.buttonClickHerel}" />
--> |
JSF dataTable:
<!--
<h:commandButton type="button" value="Click Here" />
--> |
Solution of above problem:
We have two solutions of the above problem.
1. Use facelets.SKIP_COMMENTS in web.xml file and set it to true.
<context-param>
<param-name>facelets.SKIP_COMMENTS</param-name>
<param-value>true</param-value>
</context-param> |
2. Use ui:remove tag:
JSF ui:remove tag is used to define the content we want to remove.
Example:
test.xhtml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets">
<h:body>
<h2>JSF ui remove example.</h2>
<ui:remove>
<h:outputText value="Hello World" />
</ui:remove>
</h:body>
</html> |
faces-config.xml
<?xml version="1.0" encoding="windows-1252"?>
<faces-config version="2.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xi="http://www.w3.org/2001/XInclude"
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-facesconfig_2_0.xsd">
</faces-config> |
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
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-app_3_0.xsd">
<servlet>
<servlet-name>faces</servlet-name>
<servlet-class>
javax.faces.webapp.FacesServlet
<servlet-mapping>
<servlet-name>faces</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
</web-app> |
URL:
http://localhost:7001/JSFExample48/faces/test.xhtml
Output:
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