list windows users java

list windows users java

My requirement is to list Windows Users from Java API.
While searching, I came across this link.


http://stackoverflow.com/questions/333812/using-java-how-can-i-get-a-list-of-all-local-users-on-a-windows-machine

This involve use of Jacob, a Java-COM bridge.

Here is a sample code.

public static void EnumerateUsers() {

    String query = "SELECT * FROM Win32_UserAccount";
    ActiveXComponent axWMI = new ActiveXComponent("winmgmts:\\");
    Variant vCollection = axWMI.invoke("ExecQuery", new Variant(query));
    EnumVariant enumVariant = new EnumVariant(vCollection.toDispatch());
    Dispatch item = null;
    StringBuilder sb = new StringBuilder();

    while (enumVariant.hasMoreElements()) {
            item = enumVariant.nextElement().toDispatch();
            sb.append("User: " + Dispatch.call(item, "Name")).toString();
            System.out.println(sb);
            sb.setLength(0);
    } 

}

Note: This code is from the above link.

The complete code is listed below.



import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.Dispatch;
import com.jacob.com.EnumVariant;
import com.jacob.com.Variant;
import java.util.ArrayList;

/**
 *
 * @author Srikrishnan
 */
public class WindowsMgmt {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here

        WindowsMgmt ob=new WindowsMgmt();
        ArrayList<String> s=ob.EnumerateUsers();
        System.out.println("_____ List _______");
        System.out.println(s);
    }
    public  ArrayList<String> EnumerateUsers() {

     ArrayList<String> ob=new  ArrayList<String> ();
     String query = "SELECT * FROM Win32_UserAccount";
     ActiveXComponent axWMI = new  ActiveXComponent("winmgmts:\\");
    Variant vCollection = axWMI.invoke("ExecQuery", new Variant(query));
    EnumVariant enumVariant = new EnumVariant(vCollection.toDispatch());
    Dispatch item = null;
    StringBuilder sb = new StringBuilder();

    while (enumVariant.hasMoreElements()) {
            item = enumVariant.nextElement().toDispatch();
            sb.append("User: " + Dispatch.call(item, "Name")).toString();
            ob.add(Dispatch.call(item, "Name").toString());
            System.out.println(sb);
            sb.setLength(0);
    }
    return ob;
}
}


This code require "windows username"  to be checked is, to be passed as run time argument.


while running the code, pass the Jacob API JAR file in classpath argument and full path to the   Jacob API DLL file in java.library.path as follows.

java -cp .:/var/www/downloads/jacob-1.17/jacob.jar -Djava.library.path=/var/www/downloads/jacob-1.17 WindowsMgmt

Jacob API shall be obtained here,

http://jaist.dl.sourceforge.net/project/jacob-project/jacob-project/1.17/jacob-1.17.zip