I'm using Spring MVC and I'm wondering is it possible to change URL when I return ModelAndView (the view is situated at the WEB-INF folder, so redirecting to it is not working) from the controller? I mean when I return it the URL is the previous one, and its obvious because dispatcher is working, not the redirecting.
#RequestMapping(value = "/login", method = RequestMethod.POST)
public ModelAndView authenticate(#RequestParam("login") String login, #RequestParam("password") String password) {
ModelAndView modelAndView = new ModelAndView();
User user = userDao.getUserByLogin(login);
if (user != null && user.getPassword().equals(password)) {
modelAndView.addObject("user", user);
modelAndView.setViewName("home");
}
return modelAndView;
}
So my home model is in WEB-INF folder, so return redirect:/home will not work for it. Yes, I can redirect it with return home, but in that case the URL will not change.
Use redirect:/url to some other method and return the view.
When redirecting the model attributes won't available in new method so to get that in redirected method set it in RedirectFlashAttributes.
Hope it helps.
Related
I am facing a problem regarding to the Httpsession that I implementing in the Spring MVC project.
First of all, after the user successfully login, I will take the Httpsession object in loginAuthentication controller and set attribute with the name and value I want. (Shown in following figure).
A.java controller file,
#RequestMapping(value="login-authentication", method = RequestMethod.POST)
public String authentication(#Valid #ModelAttribute("systemAccount") SystemAccount systemAccount,
BindingResult bindingResult, Model model, HttpServletRequest request){
if (bindingResult.hasErrors()) {
model.addAttribute(GenericConstant.MessageAttributeName.ERROR_MSG_NAME.toValue(), SystemMessage.SystemException.LOGIN_INCORRECT_USERNAME_PASSWORD.toValue());
model.addAttribute("systemAccount", new SystemAccount());
return "index";
}else {
if (systemAccountService.authenticate(systemAccount.getUsername(), systemAccount.getPassword()) != null &&
!"".equals(systemAccountService.authenticate(systemAccount.getUsername(), systemAccount.getPassword()))) {
SystemAccount dbSystemAccount = systemAccountService.authenticate(systemAccount.getUsername(), systemAccount.getPassword());
request.setAttribute(SessionAttribute.AttributeName.LOGIN_ACC_ID.toValue(),dbSystemAccount.getAccountID());
//check account role
if(dbSystemAccount.getCounterStaff()!= null && !"".equals(dbSystemAccount.getCounterStaff())){
CounterStaff counterStaff = dbSystemAccount.getCounterStaff();
request.setAttribute(SessionAttribute.AttributeName.LOGIN_ACC_NAME.toValue(), counterStaff.getStaffName());
request.setAttribute(SessionAttribute.AttributeName.LOGIN_ACC_ROLE.toValue(), GenericConstant.SystemRole.COUNTER_STAFF.toValue());
}else if(dbSystemAccount.getCustomer()!= null && !"".equals(dbSystemAccount.getCustomer())){
Customer customer = dbSystemAccount.getCustomer();
request.setAttribute(SessionAttribute.AttributeName.LOGIN_ACC_NAME.toValue(), customer.getCustomerName());
request.setAttribute(SessionAttribute.AttributeName.LOGIN_ACC_ROLE.toValue(), GenericConstant.SystemRole.CUSTOMER.toValue());
}else if(dbSystemAccount.getManager()!= null && !"".equals(dbSystemAccount.getManager())){
Manager manager = dbSystemAccount.getManager();
request.setAttribute(SessionAttribute.AttributeName.LOGIN_ACC_NAME.toValue(), manager.getManagerName());
request.setAttribute(SessionAttribute.AttributeName.LOGIN_ACC_ROLE.toValue(), GenericConstant.SystemRole.MANAGER.toValue());
}else if(dbSystemAccount.getDoctor()!= null && !"".equals(dbSystemAccount.getCounterStaff())){
Doctor doctor = dbSystemAccount.getDoctor();
request.setAttribute(SessionAttribute.AttributeName.LOGIN_ACC_NAME.toValue(), doctor.getDoctorName());
request.setAttribute(SessionAttribute.AttributeName.LOGIN_ACC_ROLE.toValue(), GenericConstant.SystemRole.DOCTOR.toValue());
}
request.setAttribute(SessionAttribute.AttributeName.LOGIN_DATE.toValue(), DateTimeUtil.getCurrentDate());
return "mainPage";
}else {
model.addAttribute(GenericConstant.MessageAttributeName.ERROR_MSG_NAME.toValue(), SystemMessage.SystemException.LOGIN_INCORRECT_USERNAME_PASSWORD);
model.addAttribute("systemAccount", new SystemAccount());
return "index";
}
}
}
After everything is ready, the controller will navigate user to the main page and the main page able to access all the defined variable without issue. (The following figure shown the controller that mapped with mainPage).
A.java controller file,
#RequestMapping(value = "/mainPage", method = RequestMethod.GET)
public String renderMainPageView(Model model, HttpServletRequest request) {
if(request.getAttribute(SessionAttribute.AttributeName.LOGIN_CHECK.toValue()) != null) {
model.addAttribute(SessionAttribute.AttributeName.LOGIN_ACC_ID.toValue(),
request.getAttribute(SessionAttribute.AttributeName.LOGIN_ACC_ID.toValue()));
model.addAttribute(SessionAttribute.AttributeName.LOGIN_ACC_NAME.toValue(),
request.getAttribute(SessionAttribute.AttributeName.LOGIN_ACC_NAME.toValue()));
model.addAttribute(SessionAttribute.AttributeName.LOGIN_ACC_ROLE.toValue(),
request.getAttribute(SessionAttribute.AttributeName.LOGIN_ACC_ROLE.toValue()));
model.addAttribute(SessionAttribute.AttributeName.LOGIN_DATE.toValue(),
request.getAttribute(SessionAttribute.AttributeName.LOGIN_DATE.toValue()));
return "mainPage";
}else {
model.addAttribute("systemAccount", new SystemAccount());
return "index";
}
}
In the navigation menu of main page, I click on the selection to direct me to add manager web page. (The following shown the link).
<a href="addManager" target="ifrm" >Add New Account</a>
The controller that mapped with the link (GET) able to detect. However, this controller (renderAddManagerView) does not recognised the HTTP session that I defined earlier when I try to access using the getAttribute method in the if condition. It keep showing null value (Shown in the following figure.
B.java controller file,
#RequestMapping(value = "/addManager", method = RequestMethod.GET)
public String renderAddManagerView(Model model, HttpSession httpSession) {
if(httpSession.getAttribute(SessionAttribute.AttributeName.LOGIN_CHECK.toValue()) != null) {
model.addAttribute("manager", new Manager());
model.addAttribute(FormSelectionValue.FormSelectionAttributeName.COUNTRY_SELECTION.toValue(), FormSelectionValue.COUNTRY_SELECTION_LIST);
model.addAttribute(FormSelectionValue.FormSelectionAttributeName.GENDER_SELECTION.toValue(), FormSelectionValue.GENDER_SELECTION_LIST);
return "addManager";
}else {
model.addAttribute("systemAccount", new SystemAccount());
return "index";
}
}
So I am not sure what is the issue for my code and there is no error message is displayed.
I have solved the issue by using the HttpServletRequest instead of HttpSession.
Now my session will not be loss even redirect or navigate to any pages in JSP.
Something like this:
#RequestMapping("/renderview", method = RequestMethod.GET)
#Controller
public class TestController {
#RequestMapping(method = RequestMethod.GET)
public String myMethod(HttpServletRequest request)
{
request.getSession().setAttribute("mySession", "XXX");
return "jspview";
}
}
Reference: Set session variable spring mvc 3
I have a jsp page named product. I have send some message to jsp page from controller using ModelAndView. But it returns null. ModelAndView's Message is not set to jsp page. here is my controller code..
#RequestMapping(value = "/add", method = RequestMethod.POST)
public ModelAndView adduser(#ModelAttribute("productForm") Errors error, Model model) {
ModelAndView modelAndView = new ModelAndView("product");
System.out.println(modelAndView);
modelAndView.addObject("outMessage", "User Registration Success");
return new ModelAndView("redirect:/productSetup");
}
Please help me..
You should use Redirect Flash Model attributes when redirecting.
#RequestMapping(value = "/add", method = RequestMethod.POST)
public ModelAndView adduser(#ModelAttribute("productForm") Errors error, RedirectAttributes redir) {
ModelAndView modelAndView = new ModelAndView("product");
System.out.println(modelAndView);
redir.addFlashAttribute("outMessage", "User Registration Success");
return new ModelAndView("redirect:/productSetup");
}
Refer this for more info : https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/servlet/mvc/support/RedirectAttributes.html
This is my code inside the controller class. When the user enters localhost:8080/url, it retrieves the original long url let's say www.google.com saved in the database and then i want it to redirect to www.google.com but instead it redirects to localhost:8080/www.google.com and thus gives en error 500.
#RequestMapping(value="/{url}", method = RequestMethod.GET)
public RedirectView getLongURl(#PathVariable("url") String url) {
String original = database.getLongUrl(UrlShortener.decode(url));
RedirectView redirectview = new RedirectView();
redirectview.setUrl(original);
return redirectview;
}
You should return a ModelAndView
#RequestMapping(value="/{url}", method = RequestMethod.GET)
public ModelAndView method(#PathVariable("url") String url) {
String original = database.getLongUrl(UrlShortener.decode(url));
return new ModelAndView("redirect:" + original);
}
You do not have the option to redirect your request to an outside domain/host like google.com using the RedirectView. As it's name says, it redirects your request to an "another view" in your application.
Refer the docs for more on RedirectView
I am developing a web service using Spring MVC. When I referred to some examples on serving JSP pages in Controller I came across the following code:
#RequestMapping(value = "/login", method = RequestMethod.GET)
public ModelAndView showLogin(HttpServletRequest request, HttpServletResponse response) {
ModelAndView mav = new ModelAndView("login");
mav.addObject("login", new Login());
return mav;
}
Can someone tell me the reason for using addObject here. I hope "login" refers to the JSP page login.jsp. If so, what does new Login() refers to?
ModelAndView mav = new ModelAndView("login");
"login" indeed refers to the name of the JSP page. Returning this ModelAndView will direct the user to login.jsp.
mav.addObject("login", new Login());
adds an attribute to the Model in ModelAndView. This means you can access the Login object in your JSP page by accessing it through the attribute name "login", e.g. ${login}.
I am creating a very basic application with SpringBoot and Thymeleaf. In the controller I have 2 methods as follows:
Method1 - This method displays all the data from the database:
#RequestMapping("/showData")
public String showData(Model model)
{
model.addAttribute("Data", dataRepo.findAll());
return "show_data";
}
Method2 - This method adds data to the database:
#RequestMapping(value = "/addData", method = RequestMethod.POST)
public String addData(#Valid Data data, BindingResult bindingResult, Model model) {
if (bindingResult.hasErrors()) {
return "add_data";
}
model.addAttribute("data", data);
investmentTypeRepo.save(data);
return "add_data.html";
}
HTML files are present corresponding to these methods i.e. show_data.html and add_data.html.
Once the addData method completes, I want to display all the data from the database. However, the above redirects the code to the static add_data.html page and the newly added data is not displayed. I need to somehow invoke the showData method on the controller so I need to redirect the user to the /showData URL. Is this possible? If so, how can this be done?
Try this:
#RequestMapping(value = "/addData", method = RequestMethod.POST)
public String addData(#Valid Data data, BindingResult bindingResult, Model model) {
//your code
return "redirect:/showData";
}
sparrow's solution did not work for me. It just rendered the text "redirect:/"
I was able to get it working by adding HttpServletResponse httpResponse to the controller method header.
Then in the code, adding httpResponse.sendRedirect("/"); into the method.
Example:
#RequestMapping("/test")
public String test(#RequestParam("testValue") String testValue, HttpServletResponse httpResponse) throws Exception {
if(testValue == null) {
httpResponse.sendRedirect("/");
return null;
}
return "<h1>success: " + testValue + "</h1>";
}
Below Solution worked for me.
getAllCategory() method displays the data and createCategory() method add data to the database. Using return "redirect:categories";, will redirect to the getAllCategory() method.
#GetMapping("/categories")
public String getAllCategory(Model model) {
model.addAttribute("categories",categoryRepo.findAll());
return "index";
}
#PostMapping("/categories")
public String createCategory(#Valid Category category) {
categoryRepo.save(category);
return "redirect:categories";
}
OR using ajax jQuery also it is possible.
You should return a http status code 3xx from your addData request and put the redirct url in the response.