java - 使用 Java 在 Mac 上的终端中运行使用管道的命令

Question

我有一个在终端 OSX 上运行的命令:

cat File1 | ./huawei2text.pl > ~/File2.txt && cat ~/File2.txt| tr "," "\n"  > ~/Output.txt

如何仅使用 java 运行此命令？

我尝试了这段代码:

String whatToRun = "cat File1 | ./File.pl > ~/File2.txt && cat ~/File2.txt| tr "," "\n"  > ~/Output.txt";
   try
   {
     Runtime rt = Runtime.getRuntime();
     Process proc = rt.exec(whatToRun);
     int exitVal = proc.waitFor();
     System.out.println("Process exitValue:" + exitVal);
   } catch (Throwable t)
     {
       t.printStackTrace();
     }

已更新

答案及解决方案:

String whatToRun = "cat File1 | ./File.pl > File2.txt "
            + "&& cat File2.txt| tr \",\" \"\n\"  > Output.txt";
String[] shellcmd = {"/bin/sh", "-c", whatToRun};

try {
    Runtime rt = Runtime.getRuntime();
    Process proc = rt.exec(shellcmd);
    int exitVal = proc.waitFor();
    System.out.println("Process exitValue:" + exitVal);
    }
catch (Throwable t) {
    t.printStackTrace();
}

现在可以了。谢谢!

Answer 1

管道将由shell 解释。让您的 shell 执行以下命令:

String[] shellcmd = {
  "/bin/sh",
  "-c",
  whatToRun
};

Process proc = rt.exec(shellcmd);