如何使用 ProcessBuilder 设置工作目录 [英] How to set working directory with ProcessBuilder

问题描述

我正在尝试在 ubuntu 的主目录中启动一个进程.我不断收到许可被拒绝的异常，我不知道为什么.代码如下:

I am trying start a process in my home directory in ubuntu. I keep getting a permission denied exception and I have no idea why. Here is the code:

Process p = null;
ProcessBuilder pb = new ProcessBuilder("/home");
p = pb.start();

这里有一个例外:

Exception in thread "main" java.io.IOException: Cannot run program "/home": 

java.io.IOException: error=13, Permission denied
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:475)
        at tester.Main.main(Main.java:30)
Caused by: java.io.IOException: java.io.IOException: error=13, Permission denied
        at java.lang.UNIXProcess.<init>(UNIXProcess.java:164)
        at java.lang.ProcessImpl.start(ProcessImpl.java:81)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:468)
        ... 1 more
Java Result: 1

推荐答案

您正在尝试执行/home 并且它不是一个可执行文件.流程构建器的构造函数参数是要执行的命令.

You are trying to execute /home and it is not an executable file. The constructor argument of the process builder is the command to execute.

您要设置工作目录.您可以通过 目录 方法.

You want to set the working directory. You can that it via the directory method.

这是一个完整的例子:

Process p = null;
ProcessBuilder pb = new ProcessBuilder("do_foo.sh");
pb.directory(new File("/home"));
p = pb.start();

这篇关于如何使用 ProcessBuilder 设置工作目录的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！