假设 winrar。 exe 在 PATH 中，然后 Runtime.exec 能够找到它，如果它不是，你需要提供它的完全限定路径，例如，假设 winrar.exe 安装在 C：/ Program Files中/ WinRAR 你需要使用类似的东西......

Assuming that winrar.exe is in the PATH, then Runtime.exec is capable of finding it, if it is not, you will need to supply the fully qualified path to it, for example, assuming winrar.exe is installed in C:/Program Files/WinRAR you would need to use something like...

p=r.exec("C:/Program Files/WinRAR/winrar x h:\\myjar.jar *.* h:\\new");

就个人而言，我建议您使用 ProcessBuilder 因为它有其他一些额外的配置能力。在可能的情况下，您还应该将命令和参数分离为单独的 String 元素，它处理的空格比单个 String $要好得多。 c $ c>变量，例如......

Personally, I would recommend that you use ProcessBuilder as it has some additional configuration abilities amongst other things. Where possible, you should also separate your command and parameters into separate String elements, it deals with things like spaces much better then a single String variable, for example...

ProcessBuilder pb = new ProcessBuilder(
    "C:/Program Files/WinRAR/winrar",
    "x",
    "myjar.jar",
    "*.*",
    "new");
pb.directory(new File("H:/"));
pb. redirectErrorStream(true);

Process p = pb.start();

不要忘记阅读 InputStream $ c的内容$ c>来自流程，因为未能这样做可能会拖延流程

Don't forget to read the contents of the InputStream from the process, as failing to do so may stall the process