Executing PowerShell Commands in Java Program

Question

I have a PowerShell Command which I need to execute using Java program. Can somebody guide me how to do this?

My command is Get-ItemProperty HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\* | Select-Object DisplayName, DisplayVersion, Publisher, InstallDate | Format-Table –AutoSize

Fruitarian

possible duplicate of Execute Powershell script using java – Benz

Yes,I have gone through that question but can you give me a basic examle to set me going? I want to learn this. – Fruitarian

You need to exercise your google-fu and look up some examples. There's no reason you can't at least make an attempt at researching this. – Benz

Answer 1

You should write a java program like this, here is a sample based on Nirman's Tech Blog, the basic idea is to execute the command calling the PowerShell process like this:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class PowerShellCommand {

 public static void main(String[] args) throws IOException {

  //String command = "powershell.exe  your command";
  //Getting the version
  String command = "powershell.exe  $PSVersionTable.PSVersion";
  // Executing the command
  Process powerShellProcess = Runtime.getRuntime().exec(command);
  // Getting the results
  powerShellProcess.getOutputStream().close();
  String line;
  System.out.println("Standard Output:");
  BufferedReader stdout = new BufferedReader(new InputStreamReader(
    powerShellProcess.getInputStream()));
  while ((line = stdout.readLine()) != null) {
   System.out.println(line);
  }
  stdout.close();
  System.out.println("Standard Error:");
  BufferedReader stderr = new BufferedReader(new InputStreamReader(
    powerShellProcess.getErrorStream()));
  while ((line = stderr.readLine()) != null) {
   System.out.println(line);
  }
  stderr.close();
  System.out.println("Done");

 }

}

In order to execute a powershell script

String command = "powershell.exe  \"C:\\Pathtofile\\script.ps\" ";

Insnare

In case the path to the/a .ps1 file contains a space, you can modify the command to: String command1 = "powershell.exe & 'C:/test folder with spaces/yourPowershellScript.ps1' "; to run the script from eclipse. – Louvenialouver

Just incase someone would like to execute multiple commands at one time, use -and or -or between your commands to connect them. – Shuttle

Answer 2

No need of reinvent the wheel. Now you can just use jPowerShell. (Disclosure: I am the author of this tool.)

String command = "Get-ItemProperty " +
                "HKLM:\\Software\\Wow6432Node\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\* " +
                "| Select-Object DisplayName, DisplayVersion, Publisher, InstallDate " +
                "| Format-Table –AutoSize";

System.out.println(PowerShell.executeSingleCommand(command).getCommandOutput());

Cutlass

I found your JAR to be not that robust, check my question + answer ---> #42066166 – Burweed

Hello, for what I understand your problem was basically in the command string you sent to jPowershell and not in the JAR itself. – Cutlass

Just came across this post and comment. I tried jPowerShell and got a couple simple examples working so just wanted to give my anecdotal endorsement of solution. Thanks @Cutlass – Incommensurable

Is there anyway to use this library to execute commands which require admin privileges such as Disable-PnpDevice and Enable-PnpDevice? – Christoperchristoph

Answer 3

you can try to calle the powershell.exe with some commands like :

String[] commandList = {"powershell.exe", "-Command", "dir"};  

        ProcessBuilder pb = new ProcessBuilder(commandList);  

        Process p = pb.start();  

Cinchona

just a code sniped out of an old projekt you usualy dont need it – Cinchona

Answer 4

You can use -ExecutionPolicy RemoteSigned in the command.

String cmd = "cmd /c powershell -ExecutionPolicy RemoteSigned -noprofile -noninteractive C:\Users\File.ps1

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