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Java comm 未列出串行端口 - Windows XP

[英]Java comm not listing serial ports - Windows XP

原文 2011-06-08 22:50:00 5 2 java/ serial-port/ windows-xp

I have a web app that runs under Tomcat on Windows XP that needs to use serial ports.我有一个 web 应用程序，它在 Windows XP 上的 Tomcat 下运行，需要使用串行端口。 It works fine on our existing systems.它在我们现有的系统上运行良好。 I'm now trying to install it all on a new Windows XP machine.我现在正尝试将它全部安装在新的 Windows XP 机器上。 Everything in the install goes fine but the CommPortIdentifier.getPortIdentifiers() returns an empty list.安装中的一切正常，但 CommPortIdentifier.getPortIdentifiers() 返回一个空列表。 The serial ports are present and I've tested them with loopback tests using Putty.串行端口存在，我已经使用 Putty 通过环回测试对其进行了测试。 I'm aware that the location of the 3 java comm files is critical, they are in these locations below.我知道 3 个 java 通信文件的位置很关键，它们位于下面的这些位置。 What could be wrong?有什么问题？

 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

2 个解决方案

Do you have the native library in the right place?你在正确的地方有本地库吗？ Where is the win32com.dll file? win32com.dll文件在哪里？ It should be in the jre/bin folder.它应该在jre/bin文件夹中。

EDIT: ah.编辑：啊。 I see it.我看到了。 Add that to the jre/bin folder and you should be good.将其添加到jre/bin文件夹中，您应该会很好。

Try RXTX library.试试RXTX库。

Sun's Communication API not worked on my Windows XP SP3 and Windows Server 2008, but RXTX worked well on both of them, its easy to migrate source code, just change javax.comm.* import packages to gnu.io.*. Sun's Communication API not worked on my Windows XP SP3 and Windows Server 2008, but RXTX worked well on both of them, its easy to migrate source code, just change javax.comm.* import packages to gnu.io.*.