创建 Controller

创建 Controller

　　LogonAction.java：

package org.monotonous.struts;

import java.util.Locale;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.util.MessageResources;
import org.apache.commons.beanutils.PropertyUtils;

public final class LogonAction extends Action {
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
Locale locale = getLocale(request);
MessageResources messages = getResources(request);

// Validate the request parameters specified by the user
ActionErrors errors = new ActionErrors();
String username =
(String) PropertyUtils.getSimpleProperty(form, "username");
String password =
(String) PropertyUtils.getSimpleProperty(form, "password");

if ((username != "foo") || (password != "bar"))
errors.add(ActionErrors.GLOBAL_ERROR,
new ActionError("error.password.mismatch"));

// Report any errors we have discovered back to the original form
if (!errors.isEmpty()) {
saveErrors(request, errors);
return (mapping.getInputForward());
}

// Save our logged-in user in the session
HttpSession session = request.getSession();
// Do something with session...

// Remove the obsolete form bean
if (mapping.getAttribute() != null) {
if ("request".equals(mapping.getScope()))
request.removeAttribute(mapping.getAttribute());
else
session.removeAttribute(mapping.getAttribute());
}

// Forward control to the specified success URI
return (mapping.findForward("success"));