Java ProcessBuilder Pipe [duplicate]

问题

This question already has answers here:

Using Java ProcessBuilder to Execute a Piped Command (2 answers)

Closed 5 years ago.

I have a shell command my_command that accepts a pipe as input , eg

echo "test" | my_command param1 param2

I tried this:

cmd.add("echo");
cmd.add( "test");
cmd.add("| my_command");
cmd.add(param1);
cmd.add(param2);

but i did I not get desired result. cmd is a list declared using ArrayList. thanks

回答1:

ProcessBuilder can run only programs but echo is not a program but one of cmd's (in Windows) command. You should run cmd /c echo ... in Java

来源：https://stackoverflow.com/questions/21201873/java-processbuilder-pipe