根据给定的IEditPar或IEditorInput获取IFile实例。

1. 根据IEditorInput获取IFile实例
   　public static IFile getFile(IEditorInput editorInput) {
   if (editorInput == null) {
   return null;
   }
           Object o = editorInput.getAdapter(IFile.class);
           if (o instanceof IFile) {
   return (IFile) o;
   }
           return null;
       }

    
   

2. 根据IEditorPart获取IFile实例

 The code below will demonstrate how to do this.

 IFile file = (IFile) editorPart.getEditorInput().getAdapter(IFile.class);
 if (file != null) {
    // do stuff
}