www.pudn.com > SimpLogin.rar > SimpLogin.java

import com.sun.security.auth.callback.DialogCallbackHandler; 
import javax.security.auth.*; 
import javax.security.auth.login.*; 
 
public class SimpLogin { 
   public static void main(String[] args) throws Exception { 
//       TextCallbackHandler handler=new TextCallbackHandler( ); 
       DialogCallbackHandler handler=new DialogCallbackHandler( ); 
	LoginContext c = new LoginContext("simp",handler); 
//	LoginContext c = new LoginContext("simp"); 
 
       boolean pass; 
       try { 
  	       c.login(); 
	       pass=true; 
       } catch (LoginException le) { 
             pass=false; 
	      System.err.println("Authentication failed:"); 
	      System.err.println("  " + le.getMessage()); 
       }  
       if(!pass){ 
	    System.out.println("Sorry"); 
       } 
       else{ 
           System.out.println("Authentication succeeded!"); 
           Subject s = c.getSubject(); 
           System.out.println(s.getPrincipals()); 
       } 
     } 
}