使用 Java ProcessBuilder 执行管道命令

问题描述

我正在尝试使用 Java 的 ProcessBuilder 类来执行一个包含管道的命令.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

关注:

ls: grep: no such file or directory

即使该命令从命令行完美运行，我也无法让 ProcessBuilder 执行将其输出重定向到另一个的命令.

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.

有没有办法做到这一点?

Is there any way to accomplish this?

推荐答案

这应该有效:

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

要执行管道，您必须调用一个 shell，然后在该 shell 中运行您的命令.

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

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