Ant 在 Eclipse Kepler 中不起作用(Java 虚拟机启动器 - 发生了 Java 异常) [英] Ant not working in Eclipse Kepler (Java Virtual Machine Launcher - A Java Exception has occured)
问题描述
我最近升级到 Eclipse Kepler，但遇到了 Ant 问题.我收到 Java 虚拟机启动器 - 无论我在构建文件中选择哪个目标，都发生了 Java 异常错误.
I recently upgraded to Eclipse Kepler, and am having issues with Ant. I am getting the Java Virtual Machine Launcher - A Java Exception has occurred error no matter which target I choose in my build files.
我尝试重新安装 JDK，但仍然出现错误.我正在运行 JDK 的 7u25 版本.我的 JAVA_HOME 环境变量设置为 C:\Progra~1\Java\jdk1.7.0_25，所以我不认为这是问题所在.还有什么可能导致问题?
I tried reinstalling my JDK, and I still get the error. I am running the 7u25 version of the JDK. I have my JAVA_HOME environment variable set to C:\Progra~1\Java\jdk1.7.0_25, so I don't think this is the problem. What else could be causing the problem?
我还在命令行中测试了 ant，它工作得很好.这是开普勒的错误吗?
I also tested ant in the command line and it works just fine. Is this a bug in Kepler?
编辑 2:这是错误日志:
EDIT 2: Here is the log of the errors:
org.eclipse.core.runtime.CoreException: Could not find one or more classes: "org.apache.tools.ant.BuildLogger". Please check the Ant classpath.
at org.eclipse.ant.core.AntRunner.problemLoadingClass(AntRunner.java:467)
at org.eclipse.ant.core.AntRunner.run(AntRunner.java:380)
at org.eclipse.ant.internal.launching.launchConfigurations.AntLaunchDelegate.runInSameVM(AntLaunchDelegate.java:307)
at org.eclipse.ant.internal.launching.launchConfigurations.AntLaunchDelegate.launch(AntLaunchDelegate.java:260)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:858)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:707)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:700)
at org.eclipse.core.externaltools.internal.model.ExternalToolBuilder.launchBuild(ExternalToolBuilder.java:181)
at org.eclipse.core.externaltools.internal.model.ExternalToolBuilder.doBuildBasedOnScope(ExternalToolBuilder.java:169)
at org.eclipse.core.externaltools.internal.model.ExternalToolBuilder.build(ExternalToolBuilder.java:88)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:726)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:199)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:239)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
at org.eclipse.core.internal.resources.Workspace.buildInternal(Workspace.java:514)
at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:423)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:830)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:707)
at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:1018)
at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1222)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
Caused by: java.lang.NoClassDefFoundError: org/apache/tools/ant/BuildLogger
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
at java.lang.Class.getConstructor0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at org.eclipse.ant.core.AntRunner.run(AntRunner.java:324)
... 24 more
Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.BuildLogger
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at org.eclipse.ant.internal.core.AntClassLoader.findClass(AntClassLoader.java:54)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 29 more
推荐答案
这很可能是由于 Eclipse 使用的 Ant 版本不同.请在 eclipse 中更新 Ant_Home .Window --> Preferences --> Ant --> Runtime --> Classpath -->点击 Ant Home.. 并尝试定位到最新版本的 Ant 目录位置.这对我有用:)
This is most likely due to difference in Ant version being used by eclipse. Please update Ant_Home in eclipse . Window --> Preferences --> Ant --> Runtime --> Classpath -->Click Ant Home.. and try to locate the latest version of Ant directory location. This works for me :)
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