java - 如何使用 Java 运行操作系统命令

Question

我正在编写一个程序，必须使用 clafer -m=xml Case5.cfr 调用 Clafer。

所以我用

ProcessBuilder pb = new ProcessBuilder("clafer -m=xml " + "Case5.cfr");
pb.directory(new File("C:\\Users\\unituser\\workspace\\com.unitbilisim.clafer2Ecore\\src\\model\\"));
Process P = pb.start();

但总是出现以下错误:

Exception in thread "main" java.io.IOException: Cannot run program "clafer -m=xml Case5.cfr" (in directory "C:\Users\unituser\workspace\com.unitbilisim.clafer2Ecore\src\model"): CreateProcess error=2, The system cannot find the file specified
    at java.lang.ProcessBuilder.start(Unknown Source)
    at EmfCompare.emfCompareDeneme.main(emfCompareDeneme.java:54)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
    at java.lang.ProcessImpl.create(Native Method)
    at java.lang.ProcessImpl.<init>(Unknown Source)
    at java.lang.ProcessImpl.start(Unknown Source)
    ... 2 more

我不明白为什么。谁能帮我吗？

Answer 1

尝试作为

Process p = Runtime.getRuntime().exec("clafer -m=xml Case5.cfr", null, new File("C:\\Users\\unituser\\workspace\\com.unitbilisim.clafer2Ecore\\src\\model\\"));

或

Process p = new ProcessBuilder("clafer", "-m=xml", "Case5.cfr")
   .directory(new File("C:\\Users\\unituser\\workspace\\com.unitbilisim.clafer2Ecore\\src\\model\\"))
   .start();