Google App Engine-Java 8和JSP文件：編譯錯誤
[英]Google App Engine - Java 8 and JSP Files: compilation error
問題描述
我剛剛使用JDK8和Google Eclipse插件配置了Eclipse Mars。 正如文檔本身所報告的，如果將項目合規性設置為JDK7，則JDK8可以使用，我已經這樣做了。
如果僅限於Servlet端點，該項目似乎可以正常運行，但是如果有任何JSP文件，則啟動dev-server時會出現問題。
這里是有關如何重現該問題的簡單指南。
- 創建一個新的App Engine Maven項目（我使用了“
appengine-skeleton-archetype”原型） - 使用您選擇的內容創建一個新的JSP文件（在
webapp文件夾內） - 在web.xml中，將歡迎文件更改為index.jsp
- 啟動開發服務器
我制作的JSP文件非常簡單，只是Eclipse模板創建的：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
Here!
</body>
</html>
如果您不想編輯<welcome-file>配置，則只需調用由url生成的JSP
如果您有像我這樣的配置（帶有JDK8的Eclipse），則啟動dev-server應該會得到以下內容
giu 25, 2016 6:04:18 PM com.google.appengine.tools.development.SystemPropertiesManager setSystemProperties
INFORMAZIONI: Overwriting system property key 'java.util.logging.config.file', value 'C:\Users\Nicola\.m2\repository\com\google\appengine\appengine-java-sdk\1.9.38\appengine-java-sdk\appengine-java-sdk-1.9.38\config\sdk\logging.properties' with value 'WEB-INF/logging.properties' from 'C:\Users\Nicola\workspace_neon\.metadata\.plugins\org.eclipse.wst.server.core\tmp1\test\WEB-INF\appengine-web.xml'
giu 25, 2016 6:04:18 PM com.google.apphosting.utils.jetty.JettyLogger info
INFORMAZIONI: Logging to JettyLogger(null) via com.google.apphosting.utils.jetty.JettyLogger
giu 25, 2016 6:04:19 PM com.google.appengine.tools.development.DevAppServerImpl setServerTimeZone
AVVERTENZA: Unable to set the TimeZone to UTC (this is expected if running on JDK 8)
giu 25, 2016 6:04:19 PM com.google.apphosting.utils.jetty.JettyLogger info
INFORMAZIONI: jetty-6.1.x
giu 25, 2016 6:04:21 PM com.google.apphosting.utils.jetty.JettyLogger info
INFORMAZIONI: Started SelectChannelConnector@127.0.0.1:8888
giu 25, 2016 6:04:21 PM com.google.appengine.tools.development.JettyContainerService startHotDeployScanner
INFORMAZIONI: Full scan of the web app in place every 5s.
giu 25, 2016 6:04:21 PM com.google.appengine.tools.development.AbstractModule startup
INFORMAZIONI: Module instance default is running at http://localhost:8888/
giu 25, 2016 6:04:21 PM com.google.appengine.tools.development.AbstractModule startup
INFORMAZIONI: The admin console is running at http://localhost:8888/_ah/admin
giu 25, 2016 6:04:21 PM com.google.appengine.tools.development.DevAppServerImpl doStart
INFORMAZIONI: Dev App Server is now running
giu 25, 2016 6:04:22 PM org.apache.jasper.compiler.JDTCompiler$1 findType
GRAVE: Compilation error
org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException
at org.eclipse.jdt.internal.compiler.classfmt.ClassFileReader.<init>(ClassFileReader.java:342)
at org.apache.jasper.compiler.JDTCompiler$1.findType(JDTCompiler.java:206)
at org.apache.jasper.compiler.JDTCompiler$1.findType(JDTCompiler.java:163)
at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.askForType(LookupEnvironment.java:96)
at org.eclipse.jdt.internal.compiler.lookup.UnresolvedReferenceBinding.resolve(UnresolvedReferenceBinding.java:49)
at org.eclipse.jdt.internal.compiler.lookup.BinaryTypeBinding.resolveType(BinaryTypeBinding.java:97)
at org.eclipse.jdt.internal.compiler.lookup.PackageBinding.getTypeOrPackage(PackageBinding.java:167)
at org.eclipse.jdt.internal.compiler.lookup.Scope.getType(Scope.java:2187)
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:974)
at org.eclipse.jdt.internal.compiler.ast.TypeDeclaration.resolve(TypeDeclaration.java:1164)
at org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration.resolve(CompilationUnitDeclaration.java:366)
at org.eclipse.jdt.internal.compiler.Compiler.process(Compiler.java:623)
at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:392)
at org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:429)
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:84)
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$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:128)
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$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:50)
at org.mortbay.jetty.servlet.ServletHandler$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$ApiProxyHandler.handle(JettyContainerService.java:511)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$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)
giu 25, 2016 6:04:22 PM com.google.apphosting.utils.jetty.JettyLogger warn
AVVERTENZA: /
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:84)
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$CachedChain.doFilter(ServletHandler.java:1166)
at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:128)
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$CachedChain.doFilter(ServletHandler.java:1157)
at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:50)
at org.mortbay.jetty.servlet.ServletHandler$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$ApiProxyHandler.handle(JettyContainerService.java:511)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:326)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
at org.mortbay.jetty.HttpConnection$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)
是2個差異錯誤，但似乎彼此相關
Compilation error
org.eclipse.jdt.internal.compiler.classfmt.ClassFormatException
和
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
我進行了一些研究，發現與TomCat7的JDK8有關的問題，但是對於App Engine，開發服務器是基於Jetty的，因此建議的解決方案不可用
因為主項目有效（html頁面，java servlet等），所以問題似乎僅限於jsp文件
4 個解決方案
解決方案1
1 2016-06-27 08:38:13
我也遇到了類似的問題（並非完全是上述問題），並且解決它們的唯一方法是使用jdk7。因此，除非您使用的是Java8特定功能，否則我建議您嘗試使用Java 7。
解決方案2
1 2016-06-30 00:27:39
並不奇怪，這不起作用-該appengine環境使用的是jetty-6，它在jdk8存在之前就出現了:)
這是指向Google升級到Jetty-9的未解決問題的鏈接： https : //code.google.com/p/googleappengine/issues/detail? id =9537
一月
解決方案3
1 2016-08-19 14:43:47
在JDK8旁邊安裝JDK7（對於Eclipse，主要JDK仍為JDK8）並將其用作服務器運行時解決了該問題
為了使其能夠在JDK7服務器運行時中使用項目類文件，需要使用JDK7級編譯器來編譯項目。
解決方案4
0 2016-08-20 04:04:01
這里的問題是底層的Jetty實例與Java 8之前的Eclipse Java編譯器（ECJ）的較舊版本捆綁在一起。此版本的ECJ無法讀取Java8 JRE的類文件。 幸運的是， ecj更高版本是二進制兼容的，因此您只需查找ecj jar並將其替換為較新的jar。
以下步驟對我有用。 因人而異。
對於Google Cloud SDK
$ cd platform/google_appengine/google/appengine/tools/java/lib/tools/jsp $ mv repackaged-appengine-jasper-jdt-6.0.29.jar OLD-repackaged-appengine-jasper-jdt-6.0.29.jar.OLD $ cp ../../../jetty93/jetty-distribution/lib/apache-jsp/org.eclipse.jdt.core.compiler.ecj-4.4.2.jar .
對於App Engine SDK
$ cd lib/tools/jsp $ mv repackaged-appengine-jasper-jdt-6.0.29.jar OLD-repackaged-appengine-jasper-jdt-6.0.29.jar.OLD $ cp ../../../jetty93/jetty-distribution/lib/apache-jsp/org.eclipse.jdt.core.compiler.ecj-4.4.2.jar .
谷歌應用引擎 .jsp 加載錯誤 [javax.servlet.UnavailableException]
[英]google app engine .jsp error loading [javax.servlet.UnavailableException]
“無法為 JSP 加載 class”錯誤運行任何 JSP 文件與 Eclipse / GPE / Google App Engine
[英]“Unable to load class for JSP” error running ANY JSP file with Eclipse / GPE / Google App Engine
獲取IllegalStateException：沒有此類servlet：將已部署的Java應用程序訪問Google App Engine時出現jsp
[英]Getting IllegalStateException: No such servlet: jsp when accessing deployed java application to Google App Engine
如何使.jsp使用Eclipse Google App Engine調用方法
[英]how to make an .jsp invoke a method using eclipse Google app engine
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