我创建了一个空白项目（通过使用eclipse插件），创建一个默认值 jsp页面，运行GAE服务器，浏览到这个jsp，我得到了错误
JRE：1.6，编译：1.6
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
</body>
</html>
HTTP ERROR: 500
Unable to compile class for JSP
Generated servlet error:
[javac] C:\DOCUME~1\zeroonea\LOCALS~1\Temp
\Jetty_0_0_0_0_8080_war____ut4fm1\jsp\org\apache\jsp\index_jsp.java:7:
cannot access javax.servlet.jsp.HttpJspPage
Generated servlet error:
[javac] bad class file: G:\Program Files\for JAVA\eclipse\plugins
\com.google.appengine.eclipse.sdkbundle_1.2.0.v200904062334\appengine-
java-sdk-1.2.0\lib\shared\geronimo-jsp_2.1_spec-1.0.1.jar(javax/
servlet/jsp/HttpJspPage.class)
[javac] class file has wrong version 49.0, should be 48.0
[javac] Please remove or make sure it appears in the correct
subdirectory of the classpath.
[javac] public final class index_jsp extends
org.apache.jasper.runtime.HttpJspBase
[javac] ^
[javac] 1 error
RequestURI=/index.jsp
Caused by:
org.apache.jasper.JasperException: Unable to compile class for JSP
Generated servlet error:
[javac] C:\DOCUME~1\zeroonea\LOCALS~1\Temp
\Jetty_0_0_0_0_8080_war____ut4fm1\jsp\org\apache\jsp\index_jsp.java:7:
cannot access javax.servlet.jsp.HttpJspPage
Generated servlet error:
[javac] bad class file: G:\Program Files\for JAVA\eclipse\plugins
\com.google.appengine.eclipse.sdkbundle_1.2.0.v200904062334\appengine-
java-sdk-1.2.0\lib\shared\geronimo-jsp_2.1_spec-1.0.1.jar(javax/
servlet/jsp/HttpJspPage.class)
[javac] class file has wrong version 49.0, should be 48.0
[javac] Please remove or make sure it appears in the correct
subdirectory of the classpath.
[javac] public final class index_jsp extends
org.apache.jasper.runtime.HttpJspBase
[javac] ^
[javac] 1 error
at org.apache.jasper.compiler.DefaultErrorHandler.javacError
(DefaultErrorHandler.java:84)
at org.apache.jasper.compiler.ErrorDispatcher.javacError
(ErrorDispatcher.java:332)
at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:
412)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:472)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
at org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
at org.apache.jasper.JspCompilationContext.compile
(JspCompilationContext.java:511)
at org.apache.jasper.servlet.JspServletWrapper.service
(JspServletWrapper.java:295)
at org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at com.google.appengine.tools.development.PrivilegedJspServlet.access
$101(PrivilegedJspServlet.java:23)
at com.google.appengine.tools.development.PrivilegedJspServlet$2.run
(PrivilegedJspServlet.java:59)
at java.security.AccessController.doPrivileged(Native Method)
at com.google.appengine.tools.development.PrivilegedJspServlet.service
(PrivilegedJspServlet.java:57)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1093)
at
com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter
(TransactionCleanupFilter.java:43)
at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter
(ServletHandler.java:1084)
at org.mortbay.jetty.servlet.ServletHandler.handle
(ServletHandler.java:360)
at org.mortbay.jetty.security.SecurityHandler.handle
(SecurityHandler.java:216)
at org.mortbay.jetty.servlet.SessionHandler.handle
(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle
(ContextHandler.java:712)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle
(DevAppEngineWebAppContext.java:54)
at org.mortbay.jetty.handler.HandlerWrapper.handle
(HandlerWrapper.java:139)
at com.google.appengine.tools.development.JettyContainerService
$ApiProxyHandler.handle(JettyContainerService.java:306)
at org.mortbay.jetty.handler.HandlerWrapper.handle
(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:313)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
506)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete
(HttpConnection.java:830)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
at org.mortbay.io.nio.SelectChannelEndPoint.run
(SelectChannelEndPoint.java:396)
at org.mortbay.thread.BoundedThreadPool$PoolThread.run
(BoundedThreadPool.java:442)
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答案 0 :(得分：0)
Eclipse不使用你认为使用的JDK / JRE ......
答案 1 :(得分：0)
这是因为您应该使用JDK而不是JRE。
如果安装了JDK，请确保eclipse在preferences / Java下使用它。如果没有，请安装一个。
此致 优素福