How to execute windows command one by one using java process [duplicate]

Question

I have a requirement to check DNS configuration using nslookup command. The proper way to check has been given in the following link. https://technet.microsoft.com/en-us/library/aa997324(v=exchg.65).aspx

Now the actual problem in java is how to execute the commands one by one in the same process and I have to capture the output and based upon the output I may have to execute some other commands. The screenshot is given below.

It is easy to execute a simple command like "nslookup someIpAdrs". But here the requirement is different. First of all we have to enter the shell and in the same shell, I have to execute commands.

Please suggest me about how to do in Java processBuilder or if there is any java library to achieve.

I have already gone through those sites. The requirement is not similar, it is different here. First apply the command "nslookup", you will get a shell. Then in that shell execute different types of commands and capture the output and then execute other commands. — Sambit
– Sambit, Commented Nov 9, 2017 at 16:18

inquizitive · Accepted Answer · 2017-11-09 16:37:21Z

3

You need to open a new PrintWriter with the Process that executed your original command and print your arguments there.

For Example:

final Process p = Runtime.getRuntime().exec("nslookup");
final BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
final char[] buf = new char[20];
System.out.println(new String(buf, 0, in.read(buf)));
//Send next command here
new PrintWriter(p.getOutputStream(),true).println(<next command>);

You can then flush the buffer and read the output thereafter.

answered Nov 9, 2017 at 16:37

inquizitive

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