Java：如何使用命令行打开程序并进行交互

Question

I searched a lot the last hours to open program.exe and interact with it like cmd. The solutions I found did not work or just worked for opening cmd and running commands like 'dir'.

I want to open a program (lets say program.exe), entering a command, parsing the output and then entering the next command. The window of the command line does not have to be open/visible but I need to get the output and enter further commands. How can I do this with Java?

Answer 1

I think what you may be referring to opening another process and running a command-line program from it and passing arguments to this secondary process.

If so, what you are looking for is the ProcessBuilder .

You can create a Process and obtain an input stream to read from it, or an output stream to write back at it.

You might want to check the following examples:

• Executing a command
• Redirecting the output of a command .
• Sending input to a command .

Answer 2

You should have a look at Runtime. It is an object every application has and is there to interact with the environment. http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html

You can start a program with "exec" which will return an Process instance. You can access the output stream by calling "process.getOutputStream();"