代码非常简单，不再多加解释：

1  IWorkbench workbench  =  PlatformUI.getWorkbench();
 2  IPerspectiveRegistry perspReg  =  workbench.getPerspectiveRegistry();
 3  IPerspectiveDescriptor perspDesc = perspReg.findPerspectiveWithId( " com.anotherPerspective.Id " );
 4  IWorkbenchWindow window  =  workbench.getActiveWorkbenchWindow();
 5  if  (window  !=   null ) {   
 6    IWorkbenchPage page  =  window.getActivePage();   
 7    page.setPerspective(perspDesc);
 8  }