浏览器上显示JSF代码

Question

浏览器上显示JSF代码

我正在学习JSF并从Exadel.com获得帮助.我按照那里描述的步骤.

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_2_5.xsd"
    id="WebApp_ID" version="2.5">
    <display-name>FBApp</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <context-param>
        <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
        <param-value>server</param-value>
    </context-param>

    <context-param>
        <param-name>javax.faces.CONFIG_FILES</param-name>
        <param-value>/WEB-INF/faces-config.xml</param-value>
    </context-param>

    <listener>
        <listener-class>com.sun.faces.config.ConfigureListener</listener-class>
    </listener>

    <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>
</web-app>

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faces-config.xml中:

<?xml version="1.0" encoding="UTF-8"?>

<faces-config 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-facesconfig_1_2.xsd"
    version="1.2">

    <navigation-rule>
        <from-view-id>/pages/inputname.jsf</from-view-id>
        <navigation-case>
            <from-outcome>greeting</from-outcome>
            <to-view-id>/pages/greeting.jsf</to-view-id>
        </navigation-case>
    </navigation-rule>
    <managed-bean>
        <managed-bean-name>personBean</managed-bean-name>
        <managed-bean-class>com.fbapp.bean.PersonBean</managed-bean-class>
        <managed-bean-scope>request</managed-bean-scope>
    </managed-bean>

</faces-config>

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的index.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>index</title>
</head>
<body>
    <jsp:forward page="faces/pages/inputname.jsf" />
</body>
</html>

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inputname.jsp:

<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<html>
 <head>
  <title>enter your name page</title>
 </head>
 <body>
   <f:view>
     <h1>
      <h:outputText value="JSF KickStart"/>
     </h1>
     <h:form id="helloForm">
      <h:outputText value="Tell us your name"/>
      <h:inputText value="#{personBean.personName}" />
      <h:commandButton action="greeting" value="Say Hello" />
     </h:form>
   </f:view>
 </body>
</html>

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现在存在的差异是:

在index.jsp我使用<jsp:forward page="faces/pages/inputname.jsf" />和Exadel使用<jsp:forward page="/pages/inputname.jsf" />
我用过<url-pattern>/faces/*</url-pattern>,他们用过:<url-pattern>*.jsf</url-pattern>

jar库是:

公地的BeanUtils-1.7.0.jar
公地编解码器1.3.jar
公地集合-3.1.jar
公共沼气池-1.7.jar
公共-EL-1.0.jar
公地文件上传-1.0.jar
公地郎2.1.jar
共享记录-1.0.4.jar
公地验证-1.1.4.jar
JSF的API-1.2.jar
JSF的IMPL-1.2-NIGHTLY_20060227.jar
JSTL-1.1.2.jar
口 - 2.0.8.jar
XML的API-1.0.b2.jar

在JBoss 4.2.2GA(为JSF定制)中,我部署了战争运行,但是当我试图转到URL http:// localhost:8080/FBApp /时,页面呈现为:

这实际上是inputname.jsf的代码.我做错了什么？任何信息都会很明显.

感谢致敬.

编辑:代码按照BalusC的指示更改.现在我得到异常和堆栈跟踪:

19:34:04,244 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
    at com.sun.faces.taglib.jsf_core.ViewTag.doStartTag(ViewTag.java:162)
    at org.apache.jsp.pages.inputname_jsp._jspx_meth_f_005fview_005f0(inputname_jsp.java:104)
    at org.apache.jsp.pages.inputname_jsp._jspService(inputname_jsp.java:77)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:445)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292)
    at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:694)
    at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:665)
    at org.apache.jsp.index_jsp._jspService(index_jsp.java:63)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
    at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
    at java.lang.Thread.run(Thread.java:636)
19:34:04,245 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
java.lang.NullPointerException
    at com.sun.faces.taglib.jsf_core.ViewTag.doStartTag(ViewTag.java:162)
    at org.apache.jsp.pages.inputname_jsp._jspx_meth_f_005fview_005f0(inputname_jsp.java:104)
    at org.apache.jsp.pages.inputname_jsp._jspService(inputname_jsp.java:77)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654)
    at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:445)
    at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379)
    at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292)
    at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:694)
    at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:665)
    at org.apache.jsp.index_jsp._jspService(index_jsp.java:63)
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
    at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
    at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
    at java.lang.Thread.run(Thread.java:636)

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Answer 1

Bal*_*usC 8

如果您将实际的 JSP文件作为.jsf扩展名,则会发生这种情况.换句话说,您inputname.jsp的Web内容文件夹中没有文件,但实际上是inputname.jsf文件.这是错的.这些JSP文件应保留其.jsp扩展名,以便由JspServlet.否则,这些文件根本不会被解析为JSP,最终会以webbrowser中的纯文本形式结束.

您已更改的URL模式FacesServlet是/faces/*不是(推荐更多)*.jsf.因此,您应该将教程中的所有URL更改/foo.jsf为/faces/foo.jsp,也包括转发/包含和导航案例中的所有URL .你应该不会改变/faces/foo.jsf,并在实际的文件中使用了错误的扩展名.

与具体问题无关:您是否有任何特殊原因要阅读6年历史的JSF 1.1目标教程而不是更新的JSF 2.0目标教程？JSF 1.1有很多缺点,而且自1.5年前以来,Facelets已经成功地继承了传统的JSP.

根据问题评论更新:

@cularis这是我的第一个项目.我得到了java.lang.ClassCastException: com.sun.faces.application.ApplicationAssociate cannot be cast to com.sun.faces.application.ApplicationAssociate,我在这里找到了这个问题的解决方案并按照说法做了,问题解决了.我正在使用JBoss 4.2.2和JSF 1.2

如果运行时类路径被不同的版本化JSF库污染,则会发生此异常.JBoss已经内置了JSF,所以你不应该在webapp的/WEB-INF/lib文件夹中提供JSF库.如果它是不同的版本,它可能会与上述异常相冲突.

根据问题更新更新2:

java.lang.NullPointerException
    at com.sun.faces.taglib.jsf_core.ViewTag.doStartTag(ViewTag.java:162)

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嗯,这是一个讨厌的,我以前没见过.我敢打赌它只是因为类路污染造成的.JBoss 4.2.x已经内置了JSF 1.2和JSTL 1.1.请从中删除jsf*.jar和jstl*.jar库/WEB-INF/lib.还请移除所有JSF相关的<context-param>和<listener>从entires web.xml.你到目前为止已经是所有的JSF 1.2默认值.它可能会或可能不会解决您的具体问题,但至少应该将噪音降至最低.让我知道.

根据评论更新3:

我已从web.xml中删除了jar和条目,并在jboss-4.2.2.GA/server/default/deploy/jboss-web.deployer/conf/web.xml中取消注释了注释行,现在我得到了java.lang.RuntimeException: Cannot find FacesContext.但是之前的问题已经解决了

好多了.该Cannot find FacesContext错误有一个简单的原因:FacesServlet尚未调用.因此请求或转发URL与根本不匹配的URL模式FacesServlet.假设您仍然FacesServlet在URL模式上映射/faces/*并且/pages/inputname.jsp您的Web内容中有物理文件,那么您index.jsp应该包含的是以下单行(是的,除去所有不相关的HTML)

<jsp:forward page="faces/pages/inputname.jsp" />

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这种方式只是打电话

HTTP://本地主机:8080/FBApp /

应该管用.如果它不是出于某种原因(让我知道)那么至少打电话

HTTP://本地主机:8080/FBApp /面/页/ inputname.jsp

必须工作.

根据评论更新4:

FacesContext异常已经解决,但现在它正在抛出 javax.faces.FacesException: java.net.MalformedURLException: Path faces-config.xml does not start with a "/" character.

嗯,这对我来说也是新的.你web.xml现在的样子怎么样？这表明你javax.faces.CONFIG_FILES有一个错误值的上下文参数faces-config.xml.尝试将javax.faces.CONFIG_FILES值为/WEB-INF/faces-config.xmlback 的上下文参数放入web.xml.也许JBoss中使用的JSF 1.2 impl有一些与此相关的bug.

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