使用Ant时java.security.AccessControlException，但从控制台调用java时运行正常
我有以下Ant 任务：
当我运行Ant时执行 任务失败（见下面的跟踪）。 当我复制粘贴回显的类路径并使用java -classpath从命令行运行我的代码时，执行成功！
在这两种情况下都使用相同版本的java 。
我怎么可能观察到不同的行为？ java.security.AccessControlException位于stacktrace的根目录下，但我已经授予我的Ant java任务所有安全权限，包括显式的动作寄存器的MBeanTrustPermission ，它也出现在堆栈跟踪中。
跟踪（在Ant下运行时）如下：
[java] java.lang.ExceptionInInitializerError [java] at org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:194) [java] at org.apache.tools.ant.taskdefs.Java.run(Java.java:771) [java] at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:221) [java] at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:135) [java] at org.apache.tools.ant.taskdefs.Java.execute(Java.java:108) [java] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [java] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [java] at java.lang.reflect.Method.invoke(Method.java:601) [java] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [java] at org.apache.tools.ant.Task.perform(Task.java:348) [java] at org.apache.tools.ant.taskdefs.Sequential.execute(Sequential.java:68) [java] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [java] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [java] at java.lang.reflect.Method.invoke(Method.java:601) [java] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [java] at org.apache.tools.ant.Task.perform(Task.java:348) [java] at org.apache.tools.ant.taskdefs.MacroInstance.execute(MacroInstance.java:398) [java] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291) [java] at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) [java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [java] at java.lang.reflect.Method.invoke(Method.java:601) [java] at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106) [java] at org.apache.tools.ant.Task.perform(Task.java:348) [java] at org.apache.tools.ant.Target.execute(Target.java:390) [java] at org.apache.tools.ant.Target.performTasks(Target.java:411) [java] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399) [java] at org.apache.tools.ant.Project.executeTarget(Project.java:1368) [java] at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) [java] at org.apache.tools.ant.Project.executeTargets(Project.java:1251) [java] at org.apache.tools.ant.Main.runBuild(Main.java:809) [java] at org.apache.tools.ant.Main.startAnt(Main.java:217) [java] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280) [java] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109) [java] Caused by: java.lang.ExceptionInInitializerError [java] at TranslationClient.main(TranslationClient.java:5) [java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [java] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [java] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [java] at java.lang.reflect.Method.invoke(Method.java:601) [java] at org.apache.tools.ant.taskdefs.ExecuteJava.run(ExecuteJava.java:217) [java] at org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:152) [java] ... 34 more [java] Caused by: net.sf.ehcache.CacheException: java.security.AccessControlException: access denied ("javax.management.MBeanTrustPermission" "register") [java] at net.sf.ehcache.management.sampled.SampledMBeanRegistrationProvider.initialize(SampledMBeanRegistrationProvider.java:98) [java] at net.sf.ehcache.management.provider.MBeanRegistrationProviderImpl.initialize(MBeanRegistrationProviderImpl.java:63) [java] at net.sf.ehcache.CacheManager.doInit(CacheManager.java:454) [java] at net.sf.ehcache.CacheManager.init(CacheManager.java:374) [java] at net.sf.ehcache.CacheManager.(CacheManager.java:356) [java] at TranslationCache.(TranslationCache.java:10) [java] ... 41 more [java] Caused by: java.security.AccessControlException: access denied ("javax.management.MBeanTrustPermission" "register") [java] at java.security.AccessControlContext.checkPermission(AccessControlContext.java:366) [java] at java.lang.SecurityManager.checkPermission(SecurityManager.java:585) [java] at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.checkMBeanTrustPermission(DefaultMBeanServerInterceptor.java:1848) [java] at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.registerMBean(DefaultMBeanServerInterceptor.java:322) [java] at com.sun.jmx.mbeanserver.JmxMBeanServer.registerMBean(JmxMBeanServer.java:512) [java] at net.sf.ehcache.management.sampled.SampledMBeanRegistrationProvider.registerCacheManagerMBean(SampledMBeanRegistrationProvider.java:118) [java] at net.sf.ehcache.management.sampled.SampledMBeanRegistrationProvider.initialize(SampledMBeanRegistrationProvider.java:95) [java] ... 46 more
我有类似的问题。 令我惊讶的fork="yes" ，java任务中的fork="yes"就像魅力一样。 我没有必要更改任何安全策略。
我会试试这个：
尝试使用ant注册MBean时遇到了同样的问题，解决方法是将以下行添加到%JAVA_HOME%\jre\lib\security\java.policy ：
权限javax.management.MBeanTrustPermission“register”;
reference： 来自ant-users的消息
显然，Ant在运行程序时安装SecurityManager以及配置JAAS安全性的方式，代码没有必要的权限才能正确运行。
默认情况下，不安装任何SecurityManager ，因此直接从命令行执行时代码正常运行。
您可以查阅Java任务的文档，并查看“权限”。