尝试在appspot中访问我的Java应用程序时，在浏览器中出现以下错误。
Error: NOT_FOUND
然而，当我从Eclipse或ant运行时，它工作正常。我已经在GAE管理控制台中检查了日志，但找不到任何错误消息。
我还尝试在构建之前删除所有* .class文件。
使用appengine-java-sdk-1.5.3中提供的appcfg脚本部署应用程序。这种行为有什么具体原因吗？
以下是来自GAE日志控制台的调试消息：
2011-10-02 22:11:39.306 / 302 14950ms 10348cpu_ms 315api_cpu_ms 0kb Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.186 Safari/535.1
115.119.214.18 - - [02/Oct/2011:22:11:39 -0700] "GET / HTTP/1.1" 302 191 - "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/14.0.835.186 Safari/535.1" "xxxxxxxx-test.appspot.com" ms=14950 cpu_ms=10348 api_cpu_ms=315 cpm_usd=0.287514 loading_request=1 throttle_code=1 instance=00c61b117c46324075b13d0c2ce04f5678c813
I 2011-10-02 22:11:26.447
javax.servlet.ServletContext log: Initializing Spring root WebApplicationContext
W 2011-10-02 22:11:26.728
[s~xxxxxxxx-test/8.353561328003056299].<stderr>: log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader).
W 2011-10-02 22:11:26.728
[s~xxxxxxxx-test/8.353561328003056299].<stderr>: log4j:WARN Please initialize the log4j system properly.
I 2011-10-02 22:11:37.075
javax.servlet.ServletContext log: Initializing Spring FrameworkServlet 'dispatcher'
I 2011-10-02 22:11:39.306
This request caused a new process to be started for your application, and thus caused your application code to be loaded for the first time. This request may thus take longer and use more CPU than a typical request for your application.
的web.xml：
<?xml version="1.0" encoding="utf-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
version="2.5">
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/servlet-config.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/ExampleApp/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
index.jsp（welcome-file）的内容
<% response.sendRedirect("/ExampleApp/user/login"); %>
这是build.xml：
<project>
<property name="sdk.dir" location="../appengine-java-sdk-1.5.3" />
<import file="${sdk.dir}/config/user/ant-macros.xml" />
<path id="project.classpath">
<pathelement path="war/WEB-INF/classes" />
<fileset dir="war/WEB-INF/lib">
<include name="**/*.jar" />
</fileset>
<fileset dir="${sdk.dir}/lib">
<include name="shared/**/*.jar" />
</fileset>
</path>
<!--
<target name="copyjars" description="Copies the App Engine JARs to the WAR.">
<copy todir="war/WEB-INF/lib" flatten="true">
<fileset dir="${sdk.dir}/lib/user">
<include name="**/*.jar" />
</fileset>
</copy>
</target>
-->
<target name="compile" description="Compiles Java source and copies other source files to the WAR.">
<mkdir dir="war/WEB-INF/classes" />
<copy todir="war/WEB-INF/classes">
<fileset dir="src">
<exclude name="**/*.java" />
</fileset>
</copy>
<javac srcdir="src" destdir="war/WEB-INF/classes" classpathref="project.classpath" debug="on" />
</target>
<target name="datanucleusenhance" depends="compile" description="Performs JDO enhancement on compiled data classes.">
<enhance_war war="war" />
</target>
<target name="runserver" depends="datanucleusenhance" description="Starts the development server.">
<dev_appserver war="war" />
</target>
<target name="update" depends="datanucleusenhance" description="Uploads the application to App Engine.">
<appcfg action="update" war="war" />
</target>
<target name="update_indexes" depends="datanucleusenhance" description="Uploads just the datastore index configuration to App Engine.">
<appcfg action="update_indexes" war="war" />
</target>
<target name="rollback" depends="datanucleusenhance" description="Rolls back an interrupted application update.">
<appcfg action="rollback" war="war" />
</target>
<target name="request_logs" description="Downloads log data from App Engine for the application.">
<appcfg action="request_logs" war="war">
<options>
<arg value="--num_days=5"/>
</options>
<args>
<arg value="logs.txt"/>
</args>
</appcfg>
</target>
</project>
答案 0 :(得分：0)
经过几天的测试和实验，我在appspot.com上找到了解决问题的方法。 JSP配置存在问题，其中前缀有一个额外的斜杠。
旧配置：
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="order" value="2" />
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
新配置：
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="order" value="2" />
<property name="prefix" value="/WEB-INF/views" />
<property name="suffix" value=".jsp" />
</bean>
在控制器中，返回路径为“/Login/LoginPage.jsp”。 （在xml文件中做了更改，因为有太多的控制器方法返回了jsp文件位置。）
在启用log4j记录调试问题之前，我无法跟踪问题。确定问题的关键是日志中的以下行：
2011-10-10 21:38:14.644
[s~exampleapp-test/8.353868453989422042].<stdout>: 16:08:14,644 DEBUG [org.springframework.web.servlet.view.JstlView] - Forwarding to resource [/WEB-INF/views//Login/LoginPage.jsp] in InternalResourceView '/Login/LoginPage'
感谢@Dave的耐心和指导。