Jetty 9.0绝对uri:http://java.sun.com/jsp/jstl/core无法解析 [英] Jetty 9.0 The absolute uri: http://java.sun.com/jsp/jstl/core cannot be resolved
问题描述
我正在使用
- 嵌入了Jetty 9.
- 行家
- Java 1.7
- JSTL
当我在Eclipse中运行我的应用程序并浏览到包含JSTL标签的网页时，它运行良好.当我将其捆绑在可执行的jar中并从cmd提示符下运行时，我得到
When I run my app in Eclipse and browse to my webpage which contains JSTL tags it works fine. When I bundle it in an executable jar and run from cmd prompt I get
org.apache.jasper.JasperException:/jsp/pcReport.jsp(4,62)PWC6188:绝对uri: http://java.sun.com/jsp/jstl/core 不能在web.xml或与此应用程序一起部署的jar文件中解析
org.apache.jasper.JasperException: /jsp/pcReport.jsp(4,62) 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
我的依赖关系
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-webapp</artifactId>
<version>9.0.6.v20130930</version>
</dependency>
<dependency>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jsp-2.1-glassfish</artifactId>
<version>2.1.v20100127</version>
</dependency>
我的插件
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<mainClass>com.pricemon.server.Main</mainClass>
<classpathPrefix>webapp/WEB-INF/lib/</classpathPrefix>
<addClasspath>true</addClasspath>
</manifest>
<manifestEntries>
<Class-Path>etc/</Class-Path>
</manifestEntries>
</archive>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<version>2.4</version>
<configuration>
<descriptors>
<descriptor>assembly.xml</descriptor>
</descriptors>
</configuration>
<executions>
<execution>
<id>make-assembly</id>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<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"
version="2.5">
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
我的JSTL jar位于WEB-INF/lib下，位于清单类路径上
I've got my JSTL jar under WEB-INF/lib which is on my Manifest classpath
我只是想不出为什么在eclipse下运行时可以正常工作，但是从可执行jar运行时却无法工作.我也尝试过在启动时手动添加到classpath无效
I just cant figure out why this works when run under eclipse but wont work when run from executable jar. I've also tried manually adding to classpath when launching with no effect
java -classpath ./jstl-1.2.jar -jar app.jar
我缺少明显的东西吗??
Am I missing something obvious!?
推荐答案
我遇到了同样的问题，但是最近找不到答案.我不得不调试glassfish代码来解决它.我希望以下说明可以对其他人有所帮助.
I've run into the same problem but found no answer recently. I had to debug glassfish code to solve it. I hope the following explanation can help others.
关于依赖关系，要与带玻璃鱼的JSP一起运行，您将需要:
About dependencies, to run with JSP with glassfish you will need:
<dependency>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-jsp</artifactId>
<version>9.2.3.v20140905</version>
</dependency>
<dependency>
<groupId>org.eclipse.jetty.toolchain</groupId>
<artifactId>jetty-jsp-jdt</artifactId>
<version>2.3.3</version>
</dependency>
即使您拥有一罐JSLT 1.2(可能来自glassfish的 javax.servlet.jsp.jstl.jar )，嵌入式Jetty仍无法加载内核的原因是
The reason why your embedded Jetty could not load core even if you have a jar of JSLT 1.2 (propably javax.servlet.jsp.jstl.jar from glassfish) is because of TldScanner class including in glassfish jars for JSP. To be clear this class has some static like:
197 static {
198 systemUrisJsf.add("http://java.sun.com/jsf/core");
199 systemUrisJsf.add("http://java.sun.com/jsf/html");
200 systemUris.add("http://java.sun.com/jsp/jstl/core");
201 }
由于
515 private void mapTldLocation(String resourcePath, TldInfo tldInfo,
516 boolean isLocal) {
517
518 String uri = tldInfo.getUri();
519 if (uri == null) {
520 return;
521 }
522
523 if ((isLocal
524 // Local tld files override the tlds in the jar files,
525 // unless it is in a system jar (except when using myfaces)
526 && mappings.get(uri) == null
527 && !systemUris.contains(uri)
528 && (!systemUrisJsf.contains(uri) || useMyFaces)
529 ) ||
530 (!isLocal
531 // Jars are scanned bottom up, so jars in WEB-INF override
532 // thos in the system (except when using myfaces)
533 && (mappings.get(uri) == null
534 || systemUris.contains(uri)
535 || (systemUrisJsf.contains(uri) && !useMyFaces)
536 )
537 )
538 ) {
...
如果URL为" http://java，则无法加载您的TLD.sun.com/jsp/jstl/core "，并将其存储在本地jar中.为了使其不本地，必须由其父包含JSTL jar的类加载器加载该应用程序.简而言之，您需要修改代码以将 WebAppContext 初始化为类似以下内容的
There is no way it's gonna load your TLD if the url is "http://java.sun.com/jsp/jstl/core" and it is stored in a local jar. To make it NOT LOCAL, the application must be loaded by a class loader whose parent contains the JSTL jar. In short, you need to modify code to initialize WebAppContext as something like:
...
WebAppContext webapp = new WebAppContext();
// classURLs may contains URL to WEB-INF/classes or WEB-INF/lib/additional_jar of you web app
URLClassLoader classLoader = new URLClassLoader(classURLs.toArray(new URL[classURLs.size()]),
Thread.currentThread().getContextClassLoader());
webapp.setClassLoader(classLoader);
...
ContextHandlerCollection contextCollection = new ContextHandlerCollection();
contextCollection.addHandler(webapp);
...
Server server = new Server(threadPool);
server.setHandler(contextCollection);
server.start();
...
如果这没有帮助，我想学习如何在应用程序中嵌入Jetty.
If this does not help, I'd like to learn how you embed Jetty in you application.
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