那些遇到过的问题

AppEngine - 无法为JSP编译类

Noo*_*eer 7 java google-app-engine classpath maven java-8

我正在使用教程创建留言簿Web应用程序,每当我尝试连接到localhost:8080时,我收到以下错误:

  HTTP ERROR 500

Problem accessing /. Reason:

    Unable to compile class for JSP: 

An error occurred at line: 1 in the generated java file
The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files

Stacktrace:
Caused by:

org.apache.jasper.JasperException: Unable to compile class for JSP: 

An error occurred at line: 1 in the generated java file
The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files

Stacktrace:
    at org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:92)
    at org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
    at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:439)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:349)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
    at org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
    at com.google.appengine.tools.development.PrivilegedJspServlet.access$101(PrivilegedJspServlet.java:23)
    at com.google.appengine.tools.development.PrivilegedJspServlet$2.run(PrivilegedJspServlet.java:61)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.google.appengine.tools.development.PrivilegedJspServlet.service(PrivilegedJspServlet.java:58)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
    at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
    at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
    at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:327)
    at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
    at com.google.appengine.tools.development.StaticFileUtils.serveWelcomeFileAsForward(StaticFileUtils.java:82)
    at com.google.appengine.tools.development.LocalResourceFileServlet.maybeServeWelcomeFile(LocalResourceFileServlet.java:260)
    at com.google.appengine.tools.development.LocalResourceFileServlet.doGet(LocalResourceFileServlet.java:120)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
    at com.googlecode.objectify.cache.AsyncCacheFilter.doFilter(AsyncCacheFilter.java:59)
    at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:49)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
    at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:502)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:326)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
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我使用Apache Maven版本3.3.9与jdk1.8.0_92.我能够mvn appengine:devserver成功地做到并且它说了Dev App Server is now Running.我已经看过涉及Tomcat的相关问题,但他们并没有非常有帮助.我有点坚持做什么,并且我不太熟悉这个过程,因为我遵循一个教程.关于我能做些什么来解决这个问题的任何想法？这是我正在尝试的链接(注意它是一个已存档的旧链接).

Mar*_*kse 0

我遇到了同样的问题，但我的观察可能有助于解决这个问题。今天早上，我使用 Maven 原型构建了留言簿项目： mvn archetype:generate -Dappengine-version=1.9.37 .... 以这种方式创建项目后，立即执行以下操作： mvn appengine:devserver Jetty 启动，我可以在浏览器中访问留言簿应用程序。

在取得初步成功后，我尝试让它在 Eclipse 中运行。在执行此操作时，我还发现我同时使用不同的 JDK 版本，并尝试纠正此问题。我使用 Eclipse 没有成功。之后我尝试返回mvn appengine:devserver。直到那时我才遇到了如上所述的问题。

我尝试删除 .m2 目录，Maven 在其中存储下载的依赖项。我还尝试使用 构建一个新的副本mvn archetype:generate ...。这些行动没有帮助。

我有以下类路径：

[INFO] mei 20, 2016 12:01:11 AM org.apache.jasper.compiler.JspRuntimeContext initClassPath
[INFO] FINE: Compilation classpath initialized: 
/C:/work/Bitbucket/MessageApp3/target/MessageApp3-1.0-SNAPSHOT/WEB-INF/classes/;
/C:/work/Bitbucket/MessageApp3/target/MessageApp3-1.0-SNAPSHOT/WEB-INF/lib/appengine-api-1.0-sdk-1.9.37.jar;
/C:/Users/ABB/.m2/repository/com/google/appengine/appengine-java-sdk/1.9.37/appengine-java-sdk/appengine-java-sdk-1.9.37/lib/impl/agent/appengine-agentruntime.jar;
/C:/work/Bitbucket/MessageApp3/target/MessageApp3-1.0-SNAPSHOT/WEB-INF/lib/guava-18.0.jar;
/C:/work/Bitbucket/MessageApp3/target/MessageApp3-1.0-SNAPSHOT/WEB-INF/lib/jstl-1.2.jar;
/C:/work/Bitbucket/MessageApp3/target/MessageApp3-1.0-SNAPSHOT/WEB-INF/lib/objectify-5.1.5.jar;
/C:/Users/ABB/.m2/repository/com/google/appengine/appengine-java-sdk/1.9.37/appengine-java-sdk/appengine-java-sdk-1.9.37/lib/tools/jsp/repackaged-appengine-jakarta-jstl-1.1.2.jar;
/C:/Users/ABB/.m2/repository/com/google/appengine/appengine-java-sdk/1.9.37/appengine-java-sdk/appengine-java-sdk-1.9.37/lib/tools/jsp/repackaged-appengine-jakarta-standard-1.1.2.jar;
/C:/Users/ABB/.m2/repository/com/google/appengine/appengine-java-sdk/1.9.37/appengine-java-sdk/appengine-java-sdk-1.9.37/lib/tools/jsp/repackaged-appengine-jasper-jdt-6.0.29.jar;
/C:/Users/ABB/.m2/repository/com/google/appengine/appengine-java-sdk/1.9.37/appengine-java-sdk/appengine-java-sdk-1.9.37/lib/opt/tools/appengine-local-endpoints/v1/appengine-local-endpoints.jar;
C:\Users\ABB\AppData\Local\Temp\Jetty_127_0_0_1_8080_MessageApp3.1.0.SNAPSHOT____1qwjqs\jsp;
C:\Users\ABB\.m2\repository\com\google\appengine\appengine-java-sdk\1.9.37\appengine-java-sdk\appengine-java-sdk-1.9.37\lib\shared\appengine-local-runtime-shared.jar;
C:\Users\ABB\.m2\repository\com\google\appengine\appengine-java-sdk\1.9.37\appengine-java-sdk\appengine-java-sdk-1.9.37\lib\shared\el-api.jar;
C:\Users\ABB\.m2\repository\com\google\appengine\appengine-java-sdk\1.9.37\appengine-java-sdk\appengine-java-sdk-1.9.37\lib\shared\jsp\repackaged-appengine-ant-1.7.1.jar;
C:\Users\ABB\.m2\repository\com\google\appengine\appengine-java-sdk\1.9.37\appengine-java-sdk\appengine-java-sdk-1.9.37\lib\shared\jsp\repackaged-appengine-ant-launcher-1.7.1.jar;
C:\Users\ABB\.m2\repository\com\google\appengine\appengine-java-sdk\1.9.37\appengine-java-sdk\appengine-java-sdk-1.9.37\lib\shared\jsp\repackaged-appengine-jasper-6.0.29.jar;
C:\Users\ABB\.m2\repository\com\google\appengine\appengine-java-sdk\1.9.37\appengine-java-sdk\appengine-java-sdk-1.9.37\lib\shared\jsp\repackaged-appengine-jasper-el-6.0.29.jar;
C:\Users\ABB\.m2\repository\com\google\appengine\appengine-java-sdk\1.9.37\appengine-java-sdk\appengine-java-sdk-1.9.37\lib\shared\jsp\repackaged-appengine-tomcat-juli-6.0.29.jar;
C:\Users\ABB\.m2\repository\com\google\appengine\appengine-java-sdk\1.9.37\appengine-java-sdk\appengine-java-sdk-1.9.37\lib\shared\jsp-api.jar;
C:\Users\ABB\.m2\repository\com\google\appengine\appengine-java-sdk\1.9.37\appengine-java-sdk\appengine-java-sdk-1.9.37\lib\shared\servlet-api.jar;
C:\work\Bitbucket\MessageApp3\target\MessageApp3-1.0-SNAPSHOT\classes;
[INFO] mei 20, 2016 12:01:11 AM org.apache.jasper.servlet.JspServlet init
[INFO] FINE: Scratch dir for the JSP engine is: C:\Users\ABB\AppData\Local\Temp\Jetty_127_0_0_1_8080_MessageApp3.1.0.SNAPSHOT____1qwjqs\jsp
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我正在使用 JDK 1.8.0_91 和 Maven 3.3.3

编辑：当我写上面的内容时，我正在Windows下开发。2016 年 5 月 28 日，我在 32 位笔记本电脑上安装了 Ubuntu 14。使用 i88.ca 的答案，我让它工作了。

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