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我在Intellij中使用的Play Framework 2.5.x，我不太熟悉，我需要獲取頁面才能在失敗後顯示錯誤消息請求。 當前，當我輸入不正確的憑據時，頁面將重新加載而不顯示錯誤。我只需要一個簡單的方法來顯示錯誤。如何在登錄頁面顯示一條消息，如果登錄失敗
如果用戶輸入他們的憑證，則if語句會評估是否存在表單錯誤。如果是這樣，再次顯示錶單，否則處理提交。
if (response.hasErrors()) {
return ok(create.render(createViewModelForm));
}
這是createForm.html在UI \意見\會議
@(gcreateForm: Form[femr.ui.models.sessions.CreateViewModel], errorMessage: java.lang.String)
@import femr.ui.views.html.layouts.main
@import femr.ui.controllers.routes.SessionsController
@styles = {
<link rel="stylesheet" href="@routes.Assets.versioned("css/login.css")">
}
@main("Login", styles = styles) {
@helper.form(action = SessionsController.createPost(), 'class -> "form-signin") {
<div id="login">
<h1>Please sign in</h1>
<input type="text" name="email" placeholder="Email" />
<input type="password" name="password" placeholder="Password" />
<input type="submit" value="Log in" />
<img src="@routes.Assets.versioned("img/logo_color_sm.png")" />
</div>
}
}
這是在UI上的CreateForm \意見\會議
package femr.ui.controllers;
import com.google.inject.Inject;
import femr.business.services.core.ISessionService;
import femr.business.services.core.IUserService;
import femr.common.dtos.CurrentUser;
import femr.common.dtos.ServiceResponse;
import femr.data.models.core.IUser;
import femr.ui.models.sessions.CreateViewModel;
import femr.ui.views.html.sessions.create;
import femr.ui.views.html.sessions.editPassword;
import femr.util.calculations.dateUtils;
import femr.util.stringhelpers.StringUtils;
import org.joda.time.DateTime;
import org.joda.time.Days;
import play.data.Form;
import play.data.FormFactory;
import play.mvc.Controller;
import play.mvc.Result;
import java.util.ArrayList;
import java.util.regex.Pattern;
public class SessionsController extends Controller {
private final FormFactory formFactory;
private final ISessionService sessionsService;
private final IUserService userService;
@Inject
public SessionsController(FormFactory formFactory, ISessionService sessionsService, IUserService userService) {
this.formFactory = formFactory;
this.sessionsService = sessionsService;
this.userService = userService;
}
public Result createGet() {
CurrentUser currentUser = sessionsService.retrieveCurrentUserSession();
final Form<CreateViewModel> createViewModelForm = formFactory.form(CreateViewModel.class);
if (currentUser != null) {
return redirect(routes.HomeController.index());
}
return ok(create.render(createViewModelForm));
}
public Result createPost() {
final Form<CreateViewModel> createViewModelForm = formFactory.form(CreateViewModel.class);
CreateViewModel viewModel = createViewModelForm.bindFromRequest().get();
ServiceResponse<CurrentUser> response = sessionsService.createSession(viewModel.getEmail(), viewModel.getPassword(), request().remoteAddress());
if (response.hasErrors()) {
return ok(create.render(createViewModelForm));
}else{
IUser user = userService.retrieveById(response.getResponseObject().getId());
user.setLastLogin(dateUtils.getCurrentDateTime());
ServiceResponse<IUser> userResponse = userService.update(user, false);
if (userResponse.hasErrors()){
throw new RuntimeException();
}
DateTime start = new DateTime(user.getPasswordCreatedDate());
DateTime stop = new DateTime(DateTime.now());
int daysBetween = Days.daysBetween(start, stop).getDays();
if(daysBetween > 60){
user.setPasswordReset(true);
}
if (user.getPasswordReset() == true){
return editPasswordGet(user);
}
}
return redirect(routes.HomeController.index());
}
public Result editPasswordGet(IUser user){
final Form<CreateViewModel> createViewModelForm = formFactory.form(CreateViewModel.class);
return ok(editPassword.render(user.getFirstName(), user.getLastName(), createViewModelForm, new ArrayList<String>()));
}
public Result editPasswordPost(){
final Form<CreateViewModel> createViewModelForm = formFactory.form(CreateViewModel.class);
CreateViewModel viewModel = createViewModelForm.bindFromRequest().get();
CurrentUser currentUser = sessionsService.retrieveCurrentUserSession();
IUser user = userService.retrieveById(currentUser.getId());
Boolean isNewPassword = false;
Pattern hasUppercase = Pattern.compile("[A-Z]");
Pattern hasNumber = Pattern.compile("\\d");
ArrayList<String> messages = new ArrayList<>();
if (StringUtils.isNullOrWhiteSpace(viewModel.getNewPassword()))
messages.add("password is a required field");
else
{
if(viewModel.getNewPassword().length() < 6) //AJ Saclayan Password Constraints
messages.add("password is less than 6 characters");
if (!hasUppercase.matcher(viewModel.getNewPassword()).find())
messages.add("password must have an uppercase");
if (!hasNumber.matcher(viewModel.getNewPassword()).find())
messages.add("password must have a number");
if(!viewModel.getNewPassword().equals(viewModel.getNewPasswordVerify()))
messages.add("passwords do not match");
//check if new password is equal to the old password
if(userService.checkOldPassword(viewModel.getNewPassword(),userService.retrieveById(currentUser.getId()).getPassword()))
messages.add("password must not be the same one used before reset");
}
if(!messages.isEmpty())
return ok(editPassword.render(user.getFirstName(), user.getLastName(), createViewModelForm, messages));
else
{
user.setPassword(viewModel.getNewPassword());
user.setPasswordCreatedDate(DateTime.now());
user.setPasswordReset(false);
isNewPassword = true;
}
ServiceResponse<IUser> userResponse = userService.update(user, isNewPassword);
if (userResponse.hasErrors()){
throw new RuntimeException();
}
return redirect(routes.HomeController.index());
}
public Result delete() {
sessionsService.invalidateCurrentUserSession();
return redirect(routes.HomeController.index());
}
}