使用Jetty Embedded处理JSP时出现的问题. (JasperException:无法为JSP编译类) [英] Issues while using Jetty Embedded to handle JSP. (JasperException: Unable to compile class for JSP)

问题描述

我正在尝试设置Jetty Embedded以处理JSP.

I am trying to set up Jetty Embedded to handle JSPs.

当我键入 localhost:8080 时，HelloServlet可以正常工作.当我键入 localhost:8080/jsp 时，我会得到jsp文件夹中的文件列表，但是如果我将index.jsp放入文件夹中，则会出现异常. JSP仅包含简短的HTML文本，并且正文中的以下行:<%= new java.util.Date() %>.

The HelloServlet works properly when I type localhost:8080. I get the list of the files in the jsp folder when I type localhost:8080/jsp, but if I take an index.jsp into the folder I will get an exception. The JSP contains only a short HTML text and this line in the body: <%= new java.util.Date() %>.

可能是什么问题?

这是一个例外:

2013-07-08 16:29:10.007:WARN:oejs.ServletHandler:qtp1957204991-11: 
org.apache.jasper.JasperException: Unable to compile class for JSP
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:661)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:698)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:505)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:138)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:564)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:213)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1094)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:432)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:175)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1028)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:136)
    at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.Server.handle(Server.java:445)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:267)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:224)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.run(AbstractConnection.java:358)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:601)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:532)
    at java.lang.Thread.run(Unknown Source)
Caused by: 
java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "getClassLoader")
    at java.security.AccessControlContext.checkPermission(Unknown Source)
    at java.security.AccessController.checkPermission(Unknown Source)
    at org.eclipse.jetty.server.handler.ContextHandler$Context.getClassLoader(ContextHandler.java:2161)
    at org.apache.jasper.compiler.TagPluginManager.init(TagPluginManager.java:83)
    at org.apache.jasper.compiler.TagPluginManager.apply(TagPluginManager.java:57)
    at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:240)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:373)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:698)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:505)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:138)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:564)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:213)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1094)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:432)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:175)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1028)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:136)
    at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.Server.handle(Server.java:445)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:267)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:224)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.run(AbstractConnection.java:358)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:601)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:532)
    at java.lang.Thread.run(Unknown Source)

这是我的应用程序

package main;
import org.eclipse.jetty.server.Handler;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.ServerConnector;
import org.eclipse.jetty.server.handler.ContextHandler;
import org.eclipse.jetty.server.handler.HandlerList;
import org.eclipse.jetty.server.handler.ResourceHandler;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.webapp.WebAppContext;

public class SimplestServer
{
    public static void main(String[] args) throws Exception
    {
        Server server = new Server();
        ServerConnector connector = new ServerConnector(server);
        connector.setHost("127.0.0.1");
        connector.setPort(8080);
        server.addConnector(connector);

        WebAppContext webAppContext = new WebAppContext();
        webAppContext.setContextPath("/jsp");
        webAppContext.setResourceBase("./jsp/");
        webAppContext.setInitParameter("dirAllowed", "false");   

        ServletContextHandler servletContextHandler = new ServletContextHandler(ServletContextHandler.SESSIONS);
        servletContextHandler.setContextPath("/");
        servletContextHandler.addServlet(new ServletHolder(new HelloServlet()), "/*");

        HandlerList handlers = new HandlerList();
        handlers.setHandlers(new Handler[] { webAppContext, servletContextHandler });

        server.setHandler(handlers);    
        server.start();
        server.join();
    }
}

JSP代码:

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "w3.org/TR/html4/loose.dtd">;
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
        <title>Insert title here</title>
    </head>
    <body>
        <%= new java.util.Date() %>
    </body>
</html>

更新:

我以此方式解决了.现在我又遇到麻烦了. 我没有做任何更改，只是在尝试加载jsp页面时在策略文件中添加了新行，并获得了新的异常. (org.apache.jasper.JasperException: java.lang.IllegalStateException: No org.apache.tomcat.InstanceManager set in ServletContext) 我发现了一些有关此的文章，并且可能会发生，因为我在项目中手动添加了一个tomcat库. ( tomcat-juli.jar ).但是，如果我从项目中删除此库，则会收到另一个异常(仅在运行应用程序之后，而不是在我想加载JSP时)(java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory).那是因为我添加了tomcat-juli.jar.

I solved the previous problem this way. Now I am in trouble again. I didn't changed anything, just added a new row to the policy file and I get a new exception, when I try to load the jsp page. ( org.apache.jasper.JasperException: java.lang.IllegalStateException: No org.apache.tomcat.InstanceManager set in ServletContext ) I found a few articles about this, and it may happens because I added a tomcat library manually to my project. ( tomcat-juli.jar ). However if I delete this library from the project, I get an other exception (just after running the application, not when I want to load a JSP.) ( java.lang.NoClassDefFoundError: org/apache/juli/logging/LogFactory ). So that's because I added tomcat-juli.jar.

这是IllegalStateException异常的完整记录:

This is the full trace of the IllegalStateException exception:

org.apache.jasper.JasperException: java.lang.IllegalStateException: No org.apache.tomcat.InstanceManager set in ServletContext
at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:177)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:698)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:505)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:138)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:582)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:213)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1094)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:432)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:175)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1028)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:136)
at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:261)
at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:101)
at org.eclipse.jetty.servlet.DefaultServlet.doGet(DefaultServlet.java:546)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:698)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:505)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:138)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:564)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:213)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1094)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:432)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:175)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1028)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:136)
at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:445)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:267)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:224)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.run(AbstractConnection.java:358)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:601)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:532)
at java.lang.Thread.run(Unknown Source)
Caused by: 
java.lang.IllegalStateException: No org.apache.tomcat.InstanceManager set in ServletContext
    at org.apache.jasper.runtime.InstanceManagerFactory.getInstanceManager(InstanceManagerFactory.java:35)
    at org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:171)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:369)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:698)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:505)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:138)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:582)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:213)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1094)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:432)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:175)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1028)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:136)
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:261)
    at org.eclipse.jetty.server.Dispatcher.forward(Dispatcher.java:101)
    at org.eclipse.jetty.servlet.DefaultServlet.doGet(DefaultServlet.java:546)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:698)
    at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:505)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:138)
    at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:564)
    at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:213)
    at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1094)
    at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:432)
    at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:175)
    at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1028)
    at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:136)
    at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)
    at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
    at org.eclipse.jetty.server.Server.handle(Server.java:445)
    at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:267)
    at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:224)
    at org.eclipse.jetty.io.AbstractConnection$ReadCallback.run(AbstractConnection.java:358)
    at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:601)
    at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:532)
    at java.lang.Thread.run(Unknown Source)

更新2: 我已经将tomcat-juli.jar添加到"Apache Tomcat v7.0"库中.因此，这次我没有将jar捆绑到我的应用程序中，但仍然收到IllegalStateException异常.另外，我不明白为什么我在使用Jetty时该应用为什么要使用tomcat库.

UPDATE 2: I've added tomcat-juli.jar to the "Apache Tomcat v7.0" libraries. So this time I don't bundle the jar into my app, but I still get the IllegalStateException exception. In addition I don't understand why the app want to use tomcat libraries while I am using Jetty.

推荐答案

我解决了这些问题.我不知道什么是真正解决原始问题的方法，但是通过这种方式就可以了.

I solved the issues. I don't know what was the real solution for the original problem, but this way it works.

因此，我将新项目的目标运行时更改为 J2EE Preview ，而不是 Apache Tomcat v7.0 . (在Eclipse中: File-> New-> Dynamic Web Project-> New Runtime-> Basic-> J2EE Preview ).然后，我将所有文件复制到该项目中.

So I changed the target runtime of a new project to J2EE Preview instead of Apache Tomcat v7.0. (In Eclipse: File -> New -> Dynamic Web Project -> New Runtime -> Basic -> J2EE Preview ). Then I copied all of the file into this project.

此后，我遇到了一个小问题.该程序没有找到 jasper.jar ，然后没有找到 tools.jar ，因此我将它们手动添加到项目中. (tools.jar位于JDK的 lib 文件夹中，而 jasper.jar 是Apache Tomcat v7.0库的一部分.)并且可以使用.

I had a small issue after this. The program haven't find the jasper.jar then the tools.jar, so I added them manually to the project. (tools.jar located in the lib folder of the JDK and jasper.jar the part of the Apache Tomcat v7.0 library.) And it works.

这篇关于使用Jetty Embedded处理JSP时出现的问题. (JasperException:无法为JSP编译类)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！