Java ProcessBuilder开始在Linux中顺序执行多个命令

I would like to execute 2 or more commands sequentially through my Java Application using ProcessBuilder class. I Have tried multiple options as suggested in other responses/forums but no luck.

我希望通过使用ProcessBuilder类的Java应用程序顺序执行两个或多个命令。我尝试了多种选择，如在其他回复/论坛建议的，但没有运气。

Here are the things I have tried:

以下是我试过的:

    ProcessBuilder processBuilder = new ProcessBuilder("ls", ";", "pwd");

Gives me following error :

给我以下错误:

Errors : ls: ;: No such file or directory Errors : ls: pwd: No such file or directory

错误:ls:;:没有此类文件或目录错误:ls: pwd:没有此类文件或目录

    ProcessBuilder processBuilder = new ProcessBuilder("ls", "&&", "pwd");

Gives me similar error:

给我类似的错误:

Errors : ls: &&: No such file or directory Errors : ls: pwd: No such file or directory

错误:ls: && &没有这样的文件或目录错误:ls: pwd:没有这样的文件或目录。

    List<String> command = new ArrayList<String>();
    command.add("ls");
    command.add(";");
    command.add("pwd");
    ProcessBuilder processBuilder = new ProcessBuilder(command);

Gives me following error:

给我以下错误:

Errors : ls: ;: No such file or directory Errors : ls: pwd: No such file or directory

错误:ls:;:没有此类文件或目录错误:ls: pwd:没有此类文件或目录

My OS is Linux/Mac-OSX.

我的操作系统是Linux / mac osx。

2 个解决方案

#1

Your approaches are equivalent to calling ls with the specified arguments. In Bash notation, what you're running is:

您的方法等同于使用指定的参数调用ls。在Bash表示法中，您正在运行的是:

ls ';' pwd
ls '&&' pwd

If you want ls and pwd to be run as separate commands, you can use Bash (or another shell language) to wrap them into a single command:

如果您希望ls和pwd作为单独的命令运行，您可以使用Bash(或其他shell语言)将它们封装到一个命令中:

bash -c 'ls ; pwd'

which you can call this way:

你可以这样称呼它:

ProcessBuilder processBuilder = new ProcessBuilder("bash", "-c", "ls ; pwd");

#2

You could get the Process from ProcessBuilder.start() from the first command, wait using waitFor() and then launch the second one.

您可以从第一个命令processbuild .start()获取进程，使用waitFor()等待，然后启动第二个命令。

#1