在64位Server 2088上执行Runtime.getRuntime（）。exec（）时出现java.io.IOException

Question

执行此代码时出错：

Runtime.getRuntime().exec("%windir%\\system32\\RunDll32.exe shell32.dll,ShellExec_RunDLL  \"" + "C:\\test\\testcloud.txt" + "\\\"");

错误是：

java.io.IOException: CreateProcess: %windir%\system32\RunDll32.exe shell32.dll,ShellExec_RunDLL "C:\test\testcloud.txt\" error=2
    at java.lang.Win32Process.create(Native Method)
    at java.lang.Win32Process.<init>(Win32Process.java:66)
    at java.lang.Runtime.execInternal(Native Method)
    at java.lang.Runtime.exec(Runtime.java:551)
    at java.lang.Runtime.exec(Runtime.java:418)
    at java.lang.Runtime.exec(Runtime.java:361)
    at java.lang.Runtime.exec(Runtime.java:325)
    at com.hoc.ejems2.client.frames.JDiaAttachments.loadFile(JDiaAttachments.java:666)

它在Winserver 2003上正常运行。