Hi, I am new to spring so sorry if this is a beginners question, but the manual is not clear (at least not for me)
My question is: how do I share state between requests in spring? I can send data from the controller to the view by using a ModelMap, but the data in the ModelMap is not sent back to the next controller by the view. How can I do this with spring?
Below is a part of my source code. In the second controller the modelMap doesn't contain the data I stored in the modelMap in the first controller. How am I supposed to maintain state between controllers in spring?
thanks a lot for help.
@RequestMapping(value = "find/something", method = RequestMethod.GET)
public String foo(@RequestParam("parent") Parent parent, ModelMap modelMap) {
...
modelMap.addAttribute("question_index", 42);
modelMap.addAttribute("something", new Something());
modelMap.addAttribute("data", new Data());
return "some/view";
}
<form:form action="bla" method="POST" modelAttribute="data">
...// using Something() and 42
</form:form>
@RequestMapping(value = "bla", method = RequestMethod.POST)
public String bla(@ModelAttribute("data") Data data, BindingResult result, ModelMap modelMap) {
System.out.println(modelMap); // doesn't contain question_index, or something
}