Invoke Powershell scripts from Java

Question

I want to invoke my powershell script from java. Can it be done. I tried with the following code, but the stream is not closing.

import java.io.BufferedRead         


        

Answer 1

Now you can do it easily with jPowerShell

powerShell = PowerShell.openSession();

//Print results    
System.out.println(powerShell.executeScript("\"C:\\testscript.ps1\"").getCommandOutput());

powerShell.close();

Answer 2

After starting the process ( runtime.exec() ), add a line to close the input stream of the process ( which JAVA calls output stream!!):

 proc.getOutputStream().close();

Answer 3

Yes we can create remote session and execute cmdlets using powershell script.

Save the following Power shell script to testscript.ps1

 #Constant Variables
$Office365AdminUsername="YOUR_USERNAME"
$Office365AdminPassword="TOUR_PASSWORD"

#Main
Function Main {
#Remove all existing Powershell sessions
    Get-PSSession | Remove-PSSession

#Encrypt password for transmission to Office365
    $SecureOffice365Password = ConvertTo-SecureString -AsPlainText $Office365AdminPassword -Force


#Build credentials object
    $Office365Credentials  = New-Object System.Management.Automation.PSCredential $Office365AdminUsername, $SecureOffice365Password 
Write-Host : "Credentials object created"

#Create remote Powershell session
    $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell -Credential $Office365credentials -Authentication Basic –AllowRedirection  
Write-Host : "Remote session established"

#Check for errors
if ($Session -eq $null){
    Write-Host : "Invalid creditials"
}else{
    Write-Host : "Login success"
    #Import the session
        Import-PSSession $Session
}

#To check folder size
Get-MailboxFolderStatistics "YOUR_USER_NAME"  | Select Identity, FolderAndSubfolderSize

exit
}

# Start script
. Main  

Java Code :

try {
            String command = "powershell.exe \"C:\\testscript.ps1\"";
            ExecuteWatchdog watchdog = new ExecuteWatchdog(20000);
            Process powerShellProcess = Runtime.getRuntime().exec(command);
            if (watchdog != null) {
                watchdog.start(powerShellProcess);
            }
            BufferedReader stdInput = new BufferedReader(new InputStreamReader(powerShellProcess.getInputStream()));
            String line;
            System.out.println("Output :");
            while ((line = stdInput.readLine()) != null) {
                System.out.println(line);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

If you do not get output, try this: powerShellProcess.getErrorStream() instead powerShellProcess.getInputStream(). It will show the errors.