Creating a new alfresco user using a web service call requires the following jar files in your classpath:
alfresco-web-service-client.jar
axis-1.4.jar
commons-discovery-0.4.jar
commons-logging-1.1.jar
jaxrpc.jar
opensaml-1.1.jar
wsdl4j-1.6.2.jar
wss4j.jar
xmlsec-1.4.1.jar

Create a java class called AlfrescoCreateUser with a main method

public static void main(String[] args) throws Exception {
AlfrescoCreateUser alfTest = new AlfrescoCreateUser();
alfTest.createUser();
}

Copy the createPersonProperties method from the AdministrationServiceSystemTest in the web service client code

/**
* Taken from AdministrationServiceSystemTest in the web service client.
*/
private NamedValue[] createPersonProperties(String homeFolder,
String firstName,
String middleName,
String lastName,
String email,
String orgId)

{
// Create the new user objects
return new NamedValue[] {
new NamedValue(Constants.PROP_USER_HOMEFOLDER, false, homeFolder, null),
new NamedValue(Constants.PROP_USER_FIRSTNAME, false, firstName, null),
new NamedValue(Constants.PROP_USER_MIDDLENAME, false, middleName, null),
new NamedValue(Constants.PROP_USER_LASTNAME, false, lastName, null),
new NamedValue(Constants.PROP_USER_EMAIL, false, email, null),
new NamedValue(Constants.PROP_USER_ORGID, false, orgId, null)};
}

You need to set the user properties and get an authentication token using the admin access details. The code below creates a user called test with a home space also called test under Company Home -> User Homes

/**
* Creates the user test with a home space in Company Home.
*/
public void createUser() {
String login = "test";
String password = "password";
String homeFolder = "://app:company_home/cm:" + login;
String userName = "test";
String userMiddlename = "";
String userSurname = "Test";
String userEmail = "test";
String userOrg = "";

try {
AuthenticationUtils.startSession("admin", "admin");
AdministrationServiceSoapBindingStub administrationService = WebServiceFactory.getAdministrationService();
NewUserDetails newUser = new NewUserDetails(login, password, createPersonProperties(homeFolder, userName,
userMiddlename, userSurname, userEmail, userOrg));
administrationService.createUsers(new NewUserDetails[] { newUser });
}
catch (AuthenticationFault f) {
System.out.println("Administration Fault");
f.printStackTrace();
}
catch (RemoteException e) {
System.out.println("RemoteException");
e.printStackTrace();
}
finally {
AuthenticationUtils.endSession();>
}
System.out.println("User created successfully");
}

Run the class and check that the user has been created successfully.