Java通信不列出串行端口 - Windows XP

我有一个web应用程序，在Windows XP下的Tomcat下运行，需要使用串行端口。它适用于我们现有的系统。我现在试图将它全部安装在新的Windows XP机器上。安装中的所有内容都很好，但CommPortIdentifier.getPortIdentifiers（）返回一个空列表。串行端口是存在的，我用Putty进行了回送测试。我知道3个java comm文件的位置非常重要，它们位于下面的这些位置。什么可能是错的？Java通信不列出串行端口 - Windows XP

 
Volume in drive C has no label. 
Volume Serial Number is C4DF-BEB3 

Directory of C:\xxx\WEB-INF\lib 

06/07/2011 09:55 AM   28,043 comm.jar 
       1 File(s)   28,043 bytes 

    Total Files Listed: 
       1 File(s)   28,043 bytes 
       0 Dir(s) 8,122,056,704 bytes free 
Volume in drive C has no label. 
Volume Serial Number is C4DF-BEB3 

Directory of C:\xxx\WEB-INF\classes 

06/07/2011 09:55 AM    484 javax.comm.properties 
       1 File(s)   484 bytes 

Directory of C:\jre1.6.0_22\lib 

06/07/2011 09:55 AM    484 javax.comm.properties 
       1 File(s)   484 bytes 

Directory of C:\tomcat-5.5\bin 

06/07/2011 09:55 AM    484 javax.comm.properties 
       1 File(s)   484 bytes 

Directory of C:\tomcat-5.5\common\lib 

06/07/2011 09:55 AM    484 javax.comm.properties 
       1 File(s)   484 bytes 

    Total Files Listed: 
       4 File(s)   1,936 bytes 
       0 Dir(s) 8,122,052,608 bytes free 
Volume in drive C has no label. 
Volume Serial Number is C4DF-BEB3 

Directory of C:\xxx\WEB-INF\lib 

06/07/2011 09:55 AM   27,648 win32com.dll 
       1 File(s)   27,648 bytes 

Directory of C:\tomcat-5.5\bin 

06/07/2011 09:55 AM   27,648 win32com.dll 
       1 File(s)   27,648 bytes 

Directory of C:\tomcat-5.5\common\lib 

06/07/2011 09:55 AM   27,648 win32com.dll 
       1 File(s)   27,648 bytes 

    Total Files Listed: 
       3 File(s)   82,944 bytes 
       0 Dir(s) 8,122,052,608 bytes free

来源

2011-06-08 fred basset