由于缺少类路径引用，Ant构建Eclipse Mars失败(Ant build with Eclipse Mars fails due to missing classpath reference)

 我最近搬到了Eclipse Mars并安装了JDK 8u51。 我在Eclipse中使用了JBoss Tools插件，并有几个Ant文件来构建我的项目。 
 
 但是，当我在Ant视图中双击构建文件时，我的项目将不会构建。 相反，我得到这个错误信息： 
 
The archive: C:/Program%20Files%20(x86)/Eclipse%20Mars/plugins/org.eclipse.swt.win32.win32.x86_64_3.104.0.v20150528-0211.jar which is referenced by the classpath, does not exist.
 
 我检查了文件系统，JAR实际上在那里。 任何想法如何我可以解决这个问题？ 也许它是路径名中的空格（ %20 ）？ 
 
 不幸的是，我不知道这个依赖来自哪里。 在“ 外部工具配置”中，它位于“ 其他任务和支持”下 ，但我无法在其中编辑条目。 我也没有找到任何其他可以实际配置此参考的对话框。 

I recently moved to Eclipse Mars and installed JDK 8u51. I'm using the JBoss Tools plugin with my Eclipse and have a couple of Ant files to build my projects.
 
When I double-click on a build file in the Ant view, however, my project won't built. Instead I get this error message:
 
The archive: C:/Program%20Files%20(x86)/Eclipse%20Mars/plugins/org.eclipse.swt.win32.win32.x86_64_3.104.0.v20150528-0211.jar which is referenced by the classpath, does not exist.
 
I checked the file system and the JAR is actually there. Any ideas how I could fix that? Maybe it's the spaces (%20) in the path name?
 
Unfortunately, I don't know where this dependency comes from. In the External Tools Configuration it is under Additional Tasks & Support, but I cannot edit the entry there. Nor did I find any other dialog where I can actually configure this reference.

原文：https://stackoverflow.com/questions/31447926