Java Can'；t在AWS EC2上安装的Tomcat 6下读取/写入文件

我有一个在Tomcat6上运行的webapp，其中一个类检查目录是否存在，若不存在则创建它-

// make sure path exists
File f = new File(value);
if (!f.exists()) {
    if (!f.mkdirs()) {
        throw new RuntimeException("Failed creating directory " + value);
    }
}

现在，在本地机器上运行时一切正常，但在EC2实例上执行时，我在catalina.out上看到以下内容-

2012-05-30 06:57:28 main ConfigService [INFO] Directory path not exists, creating /usr/share/tomcat6/webapps/ROOT/WEB-INF/data/temp/currency
2012-05-30 06:57:28 main DefaultListableBeanFactory [INFO] Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@1b4c1d7: defining beans [fetchAppRankingJob,fetchCurrencyRatesJob,fetchReviewsJob,sendDailyReportJob,importSalesReportJob,fetchSalesReportJob,processSalesReportsJob,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,org.springframework.scheduling.support.ScheduledMethodRunnable#0,org.springframework.scheduling.support.ScheduledMethodRunnable#1,org.springframework.scheduling.support.ScheduledMethodRunnable#2,org.springframework.scheduling.support.ScheduledMethodRunnable#3,org.springframework.scheduling.support.ScheduledMethodRunnable#4,org.springframework.scheduling.config.ScheduledTaskRegistrar#0,appsales-scheduler,org.springframework.context.annotation.ConfigurationClassPostProcessor$ImportAwareBeanPostProcessor#0]; root of factory hierarchy
2012-05-30 06:57:28 main ContextLoader [ERROR] Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'fetchCurrencyRatesJob' defined in file [/var/lib/tomcat6/webapps/ROOT/WEB-INF/classes/com/appround/collect/currency/FetchCurrencyRatesJob.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.appround.collect.currency.FetchCurrencyRatesJob]: Constructor threw exception; nested exception is java.lang.RuntimeException: Failed creating directory /usr/share/tomcat6/webapps/ROOT/WEB-INF/data/temp/currency
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:997)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:943)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:485)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
        at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:385)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:284)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1079)
        at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1002)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:506)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
        at org.apache.catalina.core.StandardService.start(StandardService.java:525)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.appround.collect.currency.FetchCurrencyRatesJob]: Constructor threw exception; nested exception is java.lang.RuntimeException: Failed creating directory /usr/share/tomcat6/webapps/ROOT/WEB-INF/data/temp/currency
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:162)
        at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:76)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:990)
        ... 37 more
Caused by: java.lang.RuntimeException: Failed creating directory /usr/share/tomcat6/webapps/ROOT/WEB-INF/data/temp/currency
        at com.appround.collect.ConfigService.getPathProperty(ConfigService.java:109)
        at com.appround.collect.currency.FetchCurrencyRatesJob.<init>(FetchCurrencyRatesJob.java:18)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
        ... 39 more

不过，运气不好

有线索吗

---

谢谢

我假设您正在使用Amazon Linux，因为您提到了

ec2用户

在尝试创建新文件夹的父文件夹

/usr/share/tomcat6/webapps/

上设置了哪些权限？通常，运行Tomcat的用户（也应称为

Tomcat

）没有写入权限，除非您使用

chmod u+w

显式设置它

此外，

tomcat

用户不允许写入其他用户的主页（

/home/ec2 user/

，在您的情况下），除非您授予用户此目录的权限。您的示例有点混乱，因为您提到尝试写入

webapps

文件夹，但在策略文件中指定了

ec2用户的主目录

通常，如果要创建临时数据文件，我建议使用来创建它们，它们将自动放置在标准临时文件夹中。如果您想自己为数据文件创建一个专用文件夹，
/var/tmp/
可能更合适，因为它是临时文件的标准unix位置（
/tmp/
可能在重新启动时被清除，因此请不要将任何持久性文件放在那里）。
谢谢Axel，这就是问题所在。我写了
chown-rtomcat:tomcat/usr/share/tomcat6/webapps
，它成功了。干杯我也有同样的问题，你能解释一下你必须在哪里写chown-R tomcat:tomcat吗？
grant {
    permission java.io.FilePermission "/home/ec2-user/collect/data", "read, write";
    permission java.io.FilePermission "/home/ec2-user/collect/data/*", "read, write";
}