使用Java ProcessBuilder执行Piped命令 [英] Using Java ProcessBuilder to Execute a Piped Command

问题描述

我试图使用Java的 ProcessBuilder Class来执行一个有管道的命令。例如：

I'm trying to use Java's ProcessBuilder Class to execute a command that has a pipe in it. For example:

ls -l | grep foo

但是，我收到一个错误：

However, I get an error:

ls: |: no such file or directory

后面：

ls: grep: no such file or directory

即使该命令在命令行中完美地工作，我也不能得到 ProcessBuilder 执行重定向的命令其输出到另一个。

Even though that command works perfectly from the command line, I can not get ProcessBuilder to execute a command that redirects its output to another. Is there any way to accomplish this?

推荐答案

这应该可以工作：

ProcessBuilder b = new ProcessBuilder("/bin/sh", "-c", "ls -l| grep foo");

要执行管道，必须调用一个shell，然后在该shell中运行命令。

To execute a pipeline, you have to invoke a shell, and then run your commands inside that shell.

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