import com.sap.security.auth.login.LoginContextFactory; //导入依赖的package包/类
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
  protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
  {
      String user = request.getRemoteUser();
      
      if (user != null)
      {
          response.getWriter().println("Hello, " + user);
      }
      else
      {
          LoginContext loginContext;
          
  	   try 
          {
              loginContext =  LoginContextFactory.createLoginContext("FORM");
  		    loginContext.login();
              response.getWriter().println("Hello, " + request.getRemoteUser());
          } 
          catch (LoginException ex) 
          {
               ex.printStackTrace();
  	   }
      }
  }
 

import com.sap.security.auth.login.LoginContextFactory; //导入依赖的package包/类
@POST
@Path("logout")
public Response logoutUser() {
	logger.debug("Logging out current user...");
	
	try {
		LoginContext loginContext = LoginContextFactory.createLoginContext();
		loginContext.logout();

		return Response.status(Response.Status.OK).build();
	} catch (LoginException e) {
		logger.error("Problem occured while logging out the current user.", e);
		throw new WebApplicationException(e, Response.Status.INTERNAL_SERVER_ERROR);
	}
}
 

import com.sap.security.auth.login.LoginContextFactory; //导入依赖的package包/类
public static void logoutUser(HttpServletRequest httpRequest) throws UserServiceException {
	if (httpRequest.getRemoteUser() != null) {
		try {
			LoginContext loginContext = LoginContextFactory.createLoginContext();
			loginContext.logout();
		} catch (LoginException e) {
			String errorMessage = "Unsuccessful logout.";
			LOGGER.error(errorMessage, e);
			throw new UserServiceException(errorMessage, e);
		}
	}
}
 

import com.sap.security.auth.login.LoginContextFactory; //导入依赖的package包/类
/**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	// Call logout if the user is logged in
	LoginContext loginContext = null;
	if (request.getRemoteUser() != null) {
		try {
			loginContext = LoginContextFactory.createLoginContext();
			loginContext.logout();
		} catch (LoginException e) {
			response.sendRedirect("/");
		}
	}
	response.sendRedirect("/");
}
 

import com.sap.security.auth.login.LoginContextFactory; //导入依赖的package包/类
/**
 * Used to logout the authenticated user.
 * 
 * @param request
 *            the request for the authenticated user
 * @throws AuthenticatedUserException
 */
public static void logout(HttpServletRequest request) throws AuthenticatedUserException {

	if (request.getUserPrincipal() != null) {

		try {

			LoginContext loginContext = LoginContextFactory.createLoginContext();
			loginContext.logout();

		} catch (LoginException e) {

			LOGGER.error(ERROR_LOGOUT_FAILED_MESSAGE, e);
			throw new AuthenticatedUserException();
		}

	}
}
 

import com.sap.security.auth.login.LoginContextFactory; //导入依赖的package包/类
private void logout() throws LoginException {
	LoginContext loginContext = LoginContextFactory.createLoginContext();
	loginContext.logout();
}