Spring Boot - redirect to a different controller method - spring-boot

Question

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?

Answer 1

Try this:
#RequestMapping(value = "/addData", method = RequestMethod.POST)
public String addData(#Valid Data data, BindingResult bindingResult, Model model) {
//your code
return "redirect:/showData";
}

Answer 2

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>";
}

Answer 3

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.

Answer 4

You should return a http status code 3xx from your addData request and put the redirct url in the response.