我的问题是，当我运行一个非常简单的 JSF 应用程序时，EL 标签不会被渲染。
例如，这段代码:
<html lang="en" xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html">
<h:head>
<title>Facelets Hello World</title>
</h:head>
<h:body> #{hello.world} </h:body>
</html>
在浏览器中显示为#{hello.word}，而不是“Hello World!”我的托管 bean 应该返回:
@ManagedBean(name = "hello")
public class Hello {
public String getWorld() {
return "Hello World!";
}
}
我看过这个问题JSF 2.0 EL tags don't render in browser已经，但这对我没有帮助。而且，根据我所读到的内容，Tomcat 7 声称提供 API 和 EL 2.2 标准的实现。
我正在使用以下软件/版本:
- Eclipse Indigo 3.7.2 Java EE 版本
- Eclipse 插件:m2e 1.0.2
- Eclipse 插件:m2e-wtp 0.15.2
- Maven 2
- Tomcat 7(已尝试过以下版本)
- Tomcat 7.0.10
- Tomcat 7.0.26
- Tomcat 7.0.27
- MyFaces 2.1.6
- Oracle JDK 1.7.0
如果需要更多信息，我很乐意提供。
[编辑1]
我什至不确定这是否必要/正确，但将以下内容添加到 web.xml 并没有解决问题:
<context-param>
<param-name>org.apache.myfaces.EXPRESSION_FACTORY</param-name>
<param-value>org.apache.el.ExpressionFactoryImpl</param-value>
</context-param>
[编辑2]
web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>jsf-facelets</display-name>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
<context-param>
<param-name>javax.faces.DEFAULT_SUFFIX</param-name>
<param-value>.xhtml</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.EXPRESSION_FACTORY</param-name>
<param-value>org.apache.el.ExpressionFactoryImpl</param-value>
</context-param>
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<context-param>
<param-name>javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.NUMBER_OF_VIEWS_IN_SESSION</param-name>
<param-value>20</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.SERIALIZE_STATE_IN_SESSION</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.COMPRESS_STATE_IN_SESSION</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.COMPRESS_STATE_IN_CLIENT</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.PRETTY_HTML</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.AUTO_SCROLL</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>org.apache.myfaces.SECRET</param-name>
<param-value>NzY1NDMyMTA=</param-value>
</context-param>
<listener>
<listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
</listener>
<session-config>
<session-timeout>30</session-timeout>
</session-config>
</web-app>
最佳答案
您应该使用 .html 扩展名访问您的页面，如下所示:myPage.html
您的 servlet 映射的原因
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
关于eclipse - EL 标签未渲染，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10358827/