java - JSTL 未在嵌入式 Jetty 实例上运行的 JSP 页面中解析

Question

如果我将它部署到 Tomcat 或 Jboss 的部署文件夹中，我有一个可以正常工作的 Web 应用程序。我现在要做的是将此应用程序嵌入到 Jetty 容器中。我似乎无法让它工作，因为它吐出与 JSTL 标记库相关的错误。这是显示的错误：

Problem accessing /Web/app/localTimestamp. Reason:

    /WEB-INF/views/localTimestamp.jsp(1,62) 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

Caused by:

org.apache.jasper.JasperException: /WEB-INF/views/localTimestamp.jsp(1,62) 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 org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:92)
    at org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:378)
    at org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:172)
    at org.apache.jasper.compiler.TagLibraryInfoImpl.generateTLDLocation(TagLibraryInfoImpl.java:431)
    at org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:240)
    at org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:502)
    at org.apache.jasper.compiler.Parser.parseDirective(Parser.java:582)
    at org.apache.jasper.compiler.Parser.parseElements(Parser.java:1652)
    at org.apache.jasper.compiler.Parser.parse(Parser.java:185)
    at org.apache.jasper.compiler.ParserController.doParse(ParserController.java:244)
    at org.apache.jasper.compiler.ParserController.parse(ParserController.java:145)
    at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:212)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:625)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:575)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:485)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:537)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:412)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:271)
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:98)
    at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:238)
    at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:262)
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1157)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:927)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:734)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:575)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:485)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:519)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:233)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:412)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111)
    at org.eclipse.jetty.server.Server.handle(Server.java:351)
    at org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:451)
    at org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:916)
    at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:634)
    at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:230)
    at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:76)
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:611)
    at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:45)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:599)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:534)
    at java.lang.Thread.run(Thread.java:619)

我不明白为什么它无法获取 jstl jar 文件。这是Web应用程序的WEB-INF/lib文件夹中的jar文件

   19/06/2012  14:54            62,983 activation-1.1.jar
   19/06/2012  14:53             4,467 aopalliance-1.0.jar
   19/06/2012  14:57            59,590 commons-fileupload-1.2.2.jar
   19/06/2012  14:57           163,151 commons-io-2.1.jar
   19/06/2012  14:54           207,723 commons-lang-2.1.jar
   19/06/2012  14:53            60,686 commons-logging-1.1.1.jar
   19/06/2012  14:54           104,172 jaxb-api-2.2.jar
   19/06/2012  14:54           872,831 jaxb-impl-2.2.jar
   19/06/2012  14:57           414,240 jstl-1.2.jar
   19/06/2012  14:53           367,444 log4j-1.2.14.jar
   19/06/2012  14:53            17,384 slf4j-api-1.5.2.jar
   19/06/2012  14:53             9,501 slf4j-log4j12-1.5.2.jar
   19/06/2012  14:53           331,474 spring-aop-3.1.0.RELEASE.jar
   19/06/2012  14:53            53,079 spring-asm-3.1.0.RELEASE.jar
   19/06/2012  14:53           589,253 spring-beans-3.1.0.RELEASE.jar
   19/06/2012  14:53           829,601 spring-context-3.1.0.RELEASE.jar
   19/06/2012  14:53           106,819 spring-context-support-3.1.0.RELEASE.jar
   19/06/2012  14:53           442,400 spring-core-3.1.0.RELEASE.jar
   19/06/2012  14:53           176,283 spring-expression-3.1.0.RELEASE.jar
   19/06/2012  15:04            61,379 spring-oxm-3.0.6.RELEASE.jar
   19/06/2012  14:53           246,036 spring-tx-3.1.0.RELEASE.jar
   19/06/2012  14:53           540,819 spring-web-3.1.0.RELEASE.jar
   19/06/2012  14:53           572,266 spring-webmvc-3.1.0.RELEASE.jar
   19/06/2012  14:56           493,742 spring-ws-core-2.0.3.RELEASE.jar
   19/06/2012  14:56            92,942 spring-xml-2.0.3.RELEASE.jar
   19/06/2012  14:54            23,346 stax-api-1.0-2.jar
   19/06/2012  14:56           148,522 wsdl4j-1.6.1.jar
   19/06/2012  14:54         1,229,125 xercesImpl-2.9.1.jar
   19/06/2012  14:55           109,318 xml-apis-1.0.b2.jar

这些是 Jetty 入门应用程序中包含的库：

16/07/2012  17:35           117,444 javax.el-2.2.3.jar
16/07/2012  17:35            38,863 javax.el-api-2.2.4.jar
16/07/2012  17:35           545,240 javax.servlet.jsp-2.2.3.jar
16/07/2012  17:35            53,124 javax.servlet.jsp-api-2.2.1.jar
16/07/2012  14:03            21,212 jetty-continuation-8.1.0.RC5.jar
16/07/2012  14:03            93,383 jetty-http-8.1.0.RC5.jar
16/07/2012  14:03           101,433 jetty-io-8.1.0.RC5.jar
16/07/2012  14:03            86,238 jetty-security-8.1.0.RC5.jar
16/07/2012  14:03           330,266 jetty-server-8.1.0.RC5.jar
16/07/2012  14:03            95,359 jetty-servlet-8.1.0.RC5.jar
16/07/2012  14:03           268,069 jetty-util-8.1.0.RC5.jar
16/07/2012  14:03           106,926 jetty-webapp-8.1.0.RC5.jar
16/07/2012  14:03            37,919 jetty-xml-8.1.0.RC5.jar
19/06/2012  14:57           414,240 jstl-1.2.jar
19/06/2012  14:53           367,444 log4j-1.2.14.jar
17/07/2012  09:42             6,300 WebJettyServices-0.0.1-SNAPSHOT.jar
16/07/2012  14:03           210,354 servlet-api-3.0.20100224.jar
              17 File(s)      2,893,814 bytes

我认为该错误可能是由于 jar 文件中的冲突。我尝试了以下但没有成功

重建没有jstl依赖的war文件
在没有 jstl 依赖项的情况下重建了 Jetty Starter 应用程序。
在没有 jstl 依赖项的情况下重建两者

我现在卡住了，因为我不知道如何测试。以下是相关的代码片段。这是 Jetty 启动应用程序的 Maven pom 文件。我发现的一个大问题是很难真正知道需要哪些依赖项才能使其工作。search.maven.com 似乎没有 org.eclipse.* 依赖项所需的所有 jar 文件。

<?xml version="1.0"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <artifactId>WebClient</artifactId>
    <groupId>com.mypackage</groupId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>

  <groupId>com.mypackage</groupId>
  <artifactId>WebJettyServices</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <name>WebJettyServices</name>
  <packaging>jar</packaging>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <jetty.version>8.1.0.RC5</jetty.version>
    <log4j.version>1.2.14</log4j.version>
    <glassfish.javax.version>2.2.3</glassfish.javax.version>
    <glassfish.javax-impl.version>2.2</glassfish.javax-impl.version>
    <glassfish.javax-jstl.version>1.2.1</glassfish.javax-jstl.version>
    <glassfish.jstl.version>1.2</glassfish.jstl.version>


  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>

   <!--
        <dependency>
            <groupId>org.eclipse.jetty.aggregate</groupId>
            <artifactId>jetty-all-server</artifactId>
            <version>8.1.0.RC5</version>
        </dependency>

         Jetty Webapp -->

    <dependency>
        <groupId>org.eclipse.jetty</groupId>
        <artifactId>jetty-webapp</artifactId>
        <version>${jetty.version}</version>
    </dependency>

    <!-- JSP Support -->
    <dependency>
        <groupId>org.glassfish.web</groupId>
        <artifactId>javax.servlet.jsp</artifactId>
        <version>${glassfish.javax.version}</version>
    </dependency>

    <!-- EL Support -->
    <dependency>
        <groupId>org.glassfish.web</groupId>
        <artifactId>javax.el</artifactId>
        <version>${glassfish.javax.version}</version>
    </dependency>

    <!-- JSTL Support -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>${glassfish.jstl.version}</version>
    </dependency>    

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>    
  </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-jar-plugin</artifactId>
                <configuration>
                    <archive>
                        <manifest>
                            <mainClass>com.mypackage.jetty.WebStarter</mainClass>
                            <addClasspath>true</addClasspath>
                        </manifest>                     
                    </archive>
                </configuration>
            </plugin>
        </plugins>  
    </build>
</project>

编辑

这是有问题的 JSP 页面

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html 
     PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
     "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">

<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet" href="<c:url value="/styles/btmsm.css"/>"
    type="text/css" />
<title>Local Timestamp</title>
</head>

<body>

    <div id="container" style="width: 800px">

        <div id="header" style="background-color: #EEEEBB;">
            <h1 style="margin-bottom: 0;">Local timestamp</h1>
        </div>  

        <div id="content"
            style="background-color: #EEEEEE; height: 200px; width: 650px; float: left;">
            The local time is ${localTime}          
        </div>  
    </div>

</body>

</html>

以及 web.xml 文件中显示的 Web 应用程序版本

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="
            http://java.sun.com/xml/ns/j2ee
            http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
        version="2.4">

如果我将 war 文件直接部署到 Tomcat 或 Jboss 部署文件夹中，则该应用程序确实可以工作。仅在嵌入 Jetty 时才会出现问题。

score 1 · Accepted Answer

问题应该是你在你的web.xml中声明了你的应用程序为2.4的web-app，请用2.5或更高版本替换它，这个问题应该可以解决。

替换这个：

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="
            http://java.sun.com/xml/ns/j2ee
            http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
        version="2.4">

和：

<web-app 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id="YourWebAppID"
    version="2.5">

请反馈。

score 0 · Accepted Answer

也许你的jsp有问题？您能否在导入 JSTL 的地方发布 JSP 部分。这应该与您正在使用的网络版本兼容（请参阅 web.xml） - 所以也请在此处发布相关部分。

也许这只是路径问题或其他什么？

希望这可以帮助

java - JSTL 未在嵌入式 Jetty 实例上运行的 JSP 页面中解析

编辑

2 回答 2

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