Question

我有以下 Ant＆lt; java＆gt; 任务：

<property name="classpath-run.msg" refid="run.classpath"/>
<echo message="running the app with classpath = ${classpath-run.msg}"/>
<echo message="Java version used (ant.java.version): ${ant.java.version}"/>
<echo message="Java version used (    java.version): ${java.version}"/>
<java classname ="${project.MainClass.name}">
    <permissions>
        <grant class="java.security.AllPermission"/>
        <grant class="javax.management.MBeanTrustPermission" action="register"/>  
    </permissions>
    <classpath refid="run.classpath"/>
</java>

当我运行 Ant 时，执行任务失败（请参阅下面的跟踪）。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 位于堆栈跟踪的根目录但我已经授予我的 Ant java 任务所有安全权限，包括明确 MBeanTrustPermission < / strong>用于注册的操作，它也出现在堆栈跟踪中。

跟踪（在 Ant 下运行时）位于以下位置：

[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.<init>(CacheManager.java:356) [java] at TranslationCache.<clinit>(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

Answer 1

我有类似的问题。令我惊讶的是，java任务中的fork="yes"就像一个魅力。我没有必要更改任何安全策略。

我会试试这个：

<java fork="yes" classname ="${project.MainClass.name}">
    <classpath refid="run.classpath"/>
</java>

Answer 2

尝试使用 ant 注册 MBean 时遇到了同样的问题，解决方法是将%JAVA_HOME%\jre\lib\security\java.policy添加到以下行：

权限javax.management.MBeanTrustPermission“register”;

参考：message from ant-users

Answer 3

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常运行。

默认情况下，没有安装SecurityManager，因此直接从命令行执行时代码运行正常。

您可以参考documentation for the Java Task并查看“权限”。

使用Ant时java.security.AccessControlException，但从控制台调用java时运行正常

3 个答案: