java - Websphere 7 与 JSF 2

Question

我需要将 JSF 2 用于在 Websphere 7.0.0.13 下运行的应用程序，我遵循以下步骤:

http://www.manorrock.com/online/wiki/app/page/edit.html

***它说:

Even though Websphere 7 does not formally support JSF 2.0 you can get it to work in a degraded mode. Follow the steps below to get it to work on your version of Websphere 7.
    Upgrade to at least version 7.0.0.13
    Ship the Mojarra JAR files in your WEB-INF/lib directory
    Set the WAR classloader to PARENT_LAST
    Set the EAR classloader to PARENT_LAST and APPLICATION
Note the degraded mode means you are NOT going to be able to use @Resource or any JPA annotations. If you think you need support for it contact your IBM representative.
Note it will process @PostConstruct and @PreDestroy.***

我这样做了，但我在日志中收到此错误:

[8/30/13 22:51:32:702 CDT] 0000000c webapp        E com.ibm.ws.webcontainer.webapp.WebApp notifyServletContextCreated SRVE0283E: Exception caught while initializing context: {0}
                                 java.lang.LinkageError: loading constraint violation: loader "com/ibm/ws/classloader/CompoundClassLoader@31c031c" previously initiated loading for a different type with name "javax/servlet/ServletContext" defined by loader "org/eclipse/osgi/internal/baseadaptor/DefaultClassLoader@66656665"
    at com.sun.faces.config.WebConfiguration.getInstance(WebConfiguration.java:184)
    at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:163)
    at com.ibm.ws.webcontainer.webapp.WebApp.notifyServletContextCreated(WebApp.java:1681)
    at com.ibm.ws.webcontainer.webapp.WebApp.commonInitializationFinish(WebApp.java:374)
    at com.ibm.ws.webcontainer.webapp.WebAppImpl.initialize(WebAppImpl.java:299)
    at com.ibm.ws.webcontainer.webapp.WebGroupImpl.addWebApplication(WebGroupImpl.java:100

我的页面出现错误:

Error 404: javax.servlet.UnavailableException: SRVE0201E: Servlet [javax.faces.webapp.FacesServlet]: not a servlet class 

这是我的 web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.5" 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_2_5.xsd">
    <display-name>testJSF2</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <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>*.faces</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>*.jsf</url-pattern>
    </servlet-mapping>
</web-app>

我通过以下方式访问:

..../testJSF2/index.faces

如果我输入:

..../testJSF2/index.jsp

在页面中获取此内容:

HTTP Error Code:   500

Error Message:

JSPG0049E: /index.jsp failed to compile : 
/opt/IBM/WebSphere/AppServer/profiles/AppSrv01/temp/wasccNode01/server4/testJSF2EAR/testJSF2.war/_index.java : 48 : The method getJspApplicationContext(ServletContext) is undefined for the type JspFactory
/opt/IBM/WebSphere/AppServer/profiles/AppSrv01/temp/wasccNode01/server4/testJSF2EAR/testJSF2.war/_index.java : 100 : The method handlePageException(Exception) in the type PageContext is not applicable for the arguments (Throwable)
JSPG0091E: An error occurred at line: 20 in the file: /index.jsp
JSPG0093E: Generated servlet error from file: /index.jsp 
/opt/IBM/WebSphere/AppServer/profiles/AppSrv01/temp/wasccNode01/server4/testJSF2EAR/testJSF2.war/_index.java : 119 : The method getELContext() is undefined for the type PageContext
JSPG0091E: An error occurred at line: 21 in the file: /index.jsp
JSPG0093E: Generated servlet error from file: /index.jsp 
/opt/IBM/WebSphere/AppServer/profiles/AppSrv01/temp/wasccNode01/server4/testJSF2EAR/testJSF2.war/_index.java : 144 : The method getELContext() is undefined for the type PageContext

根本原因:

com.ibm.ws.jsp.JspCoreException: JSPG0049E: /index.jsp failed to compile : 
/opt/IBM/WebSphere/AppServer/profiles/AppSrv01/temp/wasccNode01/server4/testJSF2EAR/testJSF2.war/_index.java : 48 : The method getJspApplicationContext(ServletContext) is undefined for the type JspFactory
/opt/IBM/WebSphere/AppServer/profiles/AppSrv01/temp/wasccNode01/server4/testJSF2EAR/testJSF2.war/_index.java : 100 : The method handlePageException(Exception) in the type PageContext is not applicable for the arguments (Throwable)
JSPG0091E: An error occurred at line: 20 in the file: /index.jsp
JSPG0093E: Generated servlet error from file: /index.jsp 
/opt/IBM/WebSphere/AppServer/profiles/AppSrv01/temp/wasccNode01/server4/testJSF2EAR/testJSF2.war/_index.java : 119 : The method getELContext() is undefined for the type PageContext
JSPG0091E: An error occurred at line: 21 in the file: /index.jsp
JSPG0093E: Generated servlet error from file: /index.jsp 
/opt/IBM/WebSphere/AppServer/profiles/AppSrv01/temp/wasccNode01/server4/testJSF2EAR/testJSF2.war/_index.java : 144 : The method getELContext() is undefined for the type PageContext
    at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.translateJsp(AbstractJSPExtensionServletWrapper.java:574)
    at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper._checkForTranslation(AbstractJSPExtensionServletWrapper.java:441)
    at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.checkForTranslation(AbstractJSPExtensionServletWrapper.java:299)
    at com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:149)
    at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3826)
    at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:276)
    at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:931)

感谢您的帮助。

Answer 1

对于 WebSphere 7，我关注了另一篇文章:

http://wasbehindtheglass.blogspot.co.uk/2011/11/myfaces-20-and-websphere-application.html

我已经使用以下 jar 在 WebSphere 上创建了共享库(名称并不重要，只重要内容):

manifest.jar
myfaces-api-2.0.7.jar
myfaces-impl-2.0.7.jar
commons-logging-1.1.1.jar
commons-digester-1.8.jar
commons-collections-3.2.jar
commons-codec-1.3.jar
commons-beanutils-1.8.3.jar
\IBM\SDP\runtimes\base_v7\optionalLibraries\IBM\JSFProviders\WebSphere-MyFaces20-annotation-provider.jar

您需要给出绝对路径。 WebSphere-MyFaces20-annotation-provider.jar 应该位于您的 WebSphere 安装中。 manifest.jar 是仅包含以下 META-INF/MANIFEST.MF 的 jar:

Manifest-Version: 1.0
Extension-Name: org/apache/myfaces
Specification-Title: MyFaces 2.0.7 shared lib
Specification-Version: 1.0
Specification-Vendor: apache.org
Implementation-Version: 1.0

最后要做的事情是修改 pom.xml 以创建引用共享库的 list 条目:

<manifestEntries>
 <Extension-List>myfaces</Extension-List>
 <myfaces-Extension-Name>org/apache/myfaces</myfaces-Extension-Name>
 <myfaces-Specification-Version>1.0</myfaces-Specification-Version>
</manifestEntries>

部署后，如果共享库和 list 都配置正确，则会自动创建绑定(bind)。