Страница JSP, использующая JSTL, терпит неудачу за исключением

Question

Я унаследовал массу старого Java-веб-кода, изобилующего проблемами безопасности. Я пытаюсь использовать jstl (c: out) для решения некоторых проблем, вызванных использованием простой out.println ().

Этот веб-код Java не основан на какой-либо недавней / современной среде. Это по сути сырой код сервлета. Он использует веб-сервер Jetty (версия 9.3), который запускается как пакет OSGI. Веб-интерфейс состоит из нескольких отдельных веб-приложений, развернутых с файлами .WAR, и я просто сосредоточусь на одном из них.

Я включил директиву taglib вверху проблемного файла jsp следующим образом:

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

Когда я в первый раз захожу на страницу jsp, в журнале пристани вижу следующее:

2019-01-08 20:44:44,606 qtp1697835528-134 WARN  org.eclipse.jetty.servlet.ServletHandler  -

    org.apache.jasper.JasperException: /jsp/applicationsChoice.jsp(1,63) PWC6188: The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved in either web.xml or the jar files deployed with this application
            at ...

Теперь я видел другие посты на эту тему, в которых говорится, что вы должны включить jar-файл jstl (версия 1.2.x) в каталог WEB-INF / lib веб-приложений. Первоначально это не было сделано для этого веб-приложения. Итак, я сделал это, перестроил, а затем заново развернул файл WAR. Тем не менее, я получаю ту же ошибку / исключение при переходе на страницу JSP. Я также проверил jar-файлы для Jetty, и они содержат множество записей jstl.

Это мое первое знакомство с Java Web Dev, и я нахожусь в тупике от того, что делать или пробовать. Любая помощь будет принята с благодарностью.

---

Обновление моего вопроса с помощью файла web.xml ... Для справки, я попробовал несколько разных изменений в файле web.xml с помощью

<?xml version="1.0" encoding="ISO-8859-1"?>

<!--
<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_5.dtd">
-->

    <web-app version="2.5">
      <!--
       <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>Installation process</display-name>
        <description>
          This is version 1.0 of the installation process
          based on JSP pages.
        </description>

        <session-config>
          <session-timeout>30</session-timeout>    <!-- 30 minutes -->
        </session-config>

        <!--welcome-file-list>
          <welcome-file>jsp/install.jsp</welcome-file>
        </welcome-file-list-->

        <error-page>
          <error-code>403</error-code>
          <location>/deny</location>
        </error-page>

        <error-page>
          <error-code>404</error-code>
          <location>/notFound</location>
        </error-page>

        <error-page>
          <error-code>500</error-code>
          <location>/internalError</location>
        </error-page>

        <error-page>
          <error-code>503</error-code>
          <location>/serviceUnavail</location>
        </error-page>

        <servlet>
          <servlet-name>default</servlet-name>
          <servlet-class>org.eclipse.jetty.servlet.DefaultServlet</servlet-class>
          <init-param>
            <param-name>dirAllowed</param-name>
            <param-value>false</param-value>
          </init-param>
          <load-on-startup>1</load-on-startup>
        </servlet>



    <!-- Import the common error servlets -->
        <servlet>
          <servlet-name>Deny</servlet-name>
          <servlet-class>com.alcatel.as.webadmin.common.servlet.errors.Deny</servlet-class>
        </servlet>
        <servlet-mapping>
          <servlet-name>Deny</servlet-name>
          <url-pattern>/deny</url-pattern>
        </servlet-mapping>

        <servlet>
          <servlet-name>NotFound</servlet-name>
          <servlet-class>com.alcatel.as.webadmin.common.servlet.errors.NotFound404</servlet-class>
        </servlet>
        <servlet-mapping>
          <servlet-name>NotFound</servlet-name>
          <url-pattern>/notFound</url-pattern>
        </servlet-mapping>

        <servlet>
          <servlet-name>InternalError</servlet-name>
          <servlet-class>com.alcatel.as.webadmin.common.servlet.errors.InternalError500</servlet-class>
        </servlet>
        <servlet-mapping>
          <servlet-name>InternalError</servlet-name>
          <url-pattern>/internalError</url-pattern>
        </servlet-mapping>

        <servlet>
          <servlet-name>ServiceUnavail</servlet-name>
          <servlet-class>com.alcatel.as.webadmin.common.servlet.errors.ServiceUnavail503</servlet-class>
        </servlet>

        <servlet-mapping>
          <servlet-name>ServiceUnavail</servlet-name>
          <url-pattern>/serviceUnavail</url-pattern>
        </servlet-mapping>

    <!-- Import the common login servlet -->
        <servlet>
          <servlet-name>Login</servlet-name>
          <servlet-class>com.alcatel.as.webadmin.common.servlet.login.LoginServlet</servlet-class>
        </servlet>
        <servlet-mapping>
          <servlet-name>Login</servlet-name>
          <url-pattern>/login</url-pattern>
        </servlet-mapping>
         <servlet>
                 <servlet-name>Doc</servlet-name>
                         <servlet-class>com.alcatel_lucent.doc.DocServlet</servlet-class>
                                 <load-on-startup/>
                                          </servlet>
    <servlet>
                 <servlet-name>View</servlet-name>
                                      <servlet-class>com.alcatel_lucent.doc.ViewServlet</servlet-class>
                                                                   <load-on-startup/>

                              </servlet>

           <!-- The following servlet-mapping maps the servlet called SampleServlet1 (see the servlet element)
                    to a url-pattern of "foo". The url-pattern is used when requesting this servlet, for example:
                         http://host:port/myWebApp/foo. -->
          <servlet-mapping>
                  <servlet-name>Doc</servlet-name>
                          <url-pattern>doc</url-pattern>
                                </servlet-mapping>
                           <servlet-mapping>
                                         <servlet-name>View</servlet-name>
                                                               <url-pattern>view</url-pattern>

                </servlet-mapping>

        <security-constraint>
          <display-name>Installation Licence Constraint</display-name>
          <web-resource-collection>
             <web-resource-name>Licence Area</web-resource-name>
             <url-pattern>/jsp/licenseSetup.jsp</url-pattern>
             <url-pattern>/jsp/licenseSetupS.jsp</url-pattern>
             <url-pattern>/jsp/licenseViewer.jsp</url-pattern>
             <url-pattern>/jsp/copyLicense.jsp</url-pattern>
          </web-resource-collection>
          <auth-constraint>
             <!-- Anyone with one of the listed roles may access this area -->
             <role-name>manager</role-name>
             <role-name>license</role-name>
          </auth-constraint>
        </security-constraint>

        <security-constraint>
          <display-name>Installation Add/update products Constraint</display-name>
          <web-resource-collection>
             <web-resource-name>Product Area</web-resource-name>
             <url-pattern>/jsp/applicationsChoice.jsp</url-pattern>
             <url-pattern>/jsp/generateIdx.jsp</url-pattern>
             <url-pattern>/jsp/updateBase.jsp</url-pattern>
          </web-resource-collection>
          <auth-constraint>
             <!-- Anyone with one of the listed roles may access this area -->
             <role-name>manager</role-name>
             <role-name>product</role-name>
          </auth-constraint>
        </security-constraint>

        <security-constraint>
          <display-name>Installation slave Constraint</display-name>
          <web-resource-collection>
             <web-resource-name>slave Area</web-resource-name>
             <url-pattern>/jsp/slaveBaseSetup.jsp</url-pattern>
             <url-pattern>/jsp/slaveBaseSetupS.jsp</url-pattern>
             <url-pattern>/jsp/startSlaveBase.jsp</url-pattern>
          </web-resource-collection>
          <auth-constraint>
             <!-- Anyone with one of the listed roles may access this area -->
             <role-name>manager</role-name>
             <role-name>slavedb</role-name>
          </auth-constraint>
        </security-constraint>
        <security-constraint>
          <display-name>Installation HA Constraint</display-name>
          <web-resource-collection>
             <web-resource-name>HA Area</web-resource-name>
             <url-pattern>/jsp/haSetup.jsp</url-pattern>
             <url-pattern>/jsp/haSetupS.jsp</url-pattern>
             <url-pattern>/jsp/haDeploy.jsp</url-pattern>
          </web-resource-collection>
          <auth-constraint>
             <!-- Anyone with one of the listed roles may access this area -->
             <role-name>manager</role-name>
             <role-name>ha</role-name>
          </auth-constraint>
        </security-constraint>

        <security-constraint>
          <display-name>Installation Add/update hosts Constraint</display-name>
          <web-resource-collection>
             <web-resource-name>Add/update hosts Area</web-resource-name>
             <url-pattern>/jsp/hostsChoice.jsp</url-pattern>
             <url-pattern>/jsp/addHost.jsp</url-pattern>
             <url-pattern>/jsp/hostsChoiceS.jsp</url-pattern>
             <url-pattern>/jsp/discoverSetupS.jsp</url-pattern>
          </web-resource-collection>
          <auth-constraint>
             <!-- Anyone with one of the listed roles may access this area -->
             <role-name>manager</role-name>
             <role-name>hosts</role-name>
          </auth-constraint>
        </security-constraint>

        <security-constraint>
          <display-name>Installation Documentation Constraint</display-name>
          <web-resource-collection>
             <web-resource-name>Documentation Area</web-resource-name>
             <url-pattern>/jsp/viewDoc.jsp</url-pattern>
             <url-pattern>/doc</url-pattern>
          </web-resource-collection>
          <auth-constraint>
             <!-- Anyone with one of the listed roles may access this area -->
             <role-name>manager</role-name>
             <role-name>docs</role-name>
          </auth-constraint>
        </security-constraint>
        <security-constraint>
          <display-name>Installation Security Constraint</display-name>
          <web-resource-collection>
             <web-resource-name>Protected Area</web-resource-name>
             <url-pattern>/jsp/*</url-pattern>
          </web-resource-collection>
          <auth-constraint>
             <!-- Anyone with one of the listed roles may access this area -->
             <role-name>*</role-name>
          </auth-constraint>
        </security-constraint>

        <login-config>
          <auth-method>FORM</auth-method>
          <realm-name>asr-admin</realm-name>
          <form-login-config>
            <form-login-page>/login</form-login-page>
            <form-error-page>/login</form-error-page>
          </form-login-config>
        </login-config>

       <security-role>
         <role-name>license</role-name>
       </security-role>
       <security-role>
         <role-name>product</role-name>
       </security-role>

       <security-role>
         <role-name>slavedb</role-name>
       </security-role>
       <security-role>
         <role-name>ha</role-name>
       </security-role>
       <security-role>
         <role-name>hosts</role-name>
       </security-role>
       <security-role>
         <role-name>docs</role-name>
       </security-role>

       <security-role>
         <role-name>subadministrator</role-name>
       </security-role>

    </web-app>

Пожалуйста, имейте в виду, что я не создавал и не структурировал этот проект / код, и я не понимаю, как OSGI взаимодействует с этим, но в родительском каталоге проекта также есть файл webdefault.xml и файл webdoc.xml. Структура каталогов следующая:

../Install/install
    -> webdefault.xml
    -> webdoc.xml
    -> WEB-INF/
         -> lib/jstl-1.2.jar (I recently added this here -- doesn't help)
         -> web.xml

Вот файлы webdefault.xml и webdoc.xml

webdefault.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<!-- ===================================================================== -->
<!-- Diffs Nokia/Jetty:                                                    -->
<!--                                                                       -->
<!-- * set default session timeout "-5555" to be able to use the value     -->
<!--   of the callout agent as default value                               -->
<!--   see DistributedSessionManager.defineUseOfDefaultTimeout()           -->
<!--                                                                       -->
<!-- * JspServlet                                                          -->
<!--   development = false                                                 -->
<!--   reloading   = false                                                 -->
<!--                                                                       -->
<!-- ===================================================================== -->

<!-- ===================================================================== -->
<!-- This file contains the default descriptor for web applications.       -->
<!-- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -->
<!-- The intent of this descriptor is to include jetty specific or common  -->
<!-- configuration for all webapps.   If a context has a webdefault.xml    -->
<!-- descriptor, it is applied before the contexts own web.xml file        -->
<!--                                                                       -->
<!-- A context may be assigned a default descriptor by:                    -->
<!--  + Calling WebApplicationContext.setDefaultsDescriptor                -->
<!--  + Passed an arg to addWebApplications                                -->
<!--                                                                       -->
<!-- This file is used both as the resource within the jetty.jar (which is -->
<!-- used as the default if no explicit defaults descriptor is set) and it -->
<!-- is copied to the etc directory of the Jetty distro and explicitly     -->
<!-- by the jetty.xml file.                                                -->
<!--                                                                       -->
<!-- ===================================================================== -->

<web-app
   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"
   metadata-complete="true"
   version="2.5">

  <description>
    Default web.xml file.
    This file is applied to a Web application before it's own WEB_INF/web.xml file
  </description>

-- stuff removed for brevity -- unless you think it's important
</web-app>

Вот файл webdoc.xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<web-app
   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"
   metadata-complete="true"
   version="2.5">

  <description>
    Default web.xml file.
    This file is applied to a Web application before it's own WEB_INF/web.xml file
  </description>
  <context-param>
    <param-name>org.eclipse.jetty.webapp.NoTLDJarPattern</param-name>
    <param-value>start.jar|ant-.*\.jar|dojo-.*\.jar|jetty-.*\.jar|jsp-api-.*\.jar|junit-.*\.jar|servlet-api-.*\.jar|dnsns\.jar|rt\.jar|jsse\.jar|tools\.jar|sunpkcs11\.jar|sunjce_provider\.jar|xerces.*\.jar</param-value>
  </context-param>
  <servlet id="jsp">
    <servlet-name>jsp</servlet-name>
    <servlet-class>org.apache.jasper.servlet.JspServlet</servlet-class>
    <init-param>
        <param-name>logVerbosityLevel</param-name>
        <param-value>DEBUG</param-value>
    </init-param>
    <init-param>
        <param-name>fork</param-name>
        <param-value>false</param-value>
    </init-param>
    <init-param>
        <param-name>xpoweredBy</param-name>
        <param-value>false</param-value>
    </init-param>
    <init-param>
        <param-name>development</param-name>
        <param-value>true</param-value>
    </init-param>
    <init-param>
        <param-name>checkInterval</param-name>
        <param-value>5</param-value>
    </init-param>
    <init-param>
        <param-name>reloading</param-name>
        <param-value>true</param-value>
    </init-param>
    <init-param>
      <param-name>keepgenerated</param-name>
      <param-value>true</param-value>
    </init-param>
    <!--
    <init-param>
        <param-name>classpath</param-name>
        <param-value>?</param-value>
    </init-param>
    -->
    <load-on-startup>0</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>jsp</servlet-name>
    <url-pattern>*.jsp</url-pattern>
    <url-pattern>*.jspf</url-pattern>
    <url-pattern>*.jspx</url-pattern>
    <url-pattern>*.xsp</url-pattern>
    <url-pattern>*.JSP</url-pattern>
    <url-pattern>*.JSPF</url-pattern>
    <url-pattern>*.JSPX</url-pattern>
    <url-pattern>*.XSP</url-pattern>
  </servlet-mapping>
  <servlet>
    <servlet-name>invoker</servlet-name>
    <servlet-class>org.eclipse.jetty.servlet.Invoker</servlet-class>
    <init-param>
      <param-name>verbose</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>nonContextServlets</param-name>
      <param-value>false</param-value>
    </init-param>
    <init-param>
      <param-name>dynamicParam</param-name>
      <param-value>anyValue</param-value>
    </init-param>
    <load-on-startup>0</load-on-startup>
  </servlet>

   .. some constraint stuff and other miscellaneous stuff removed for brevity ..
</web-app>