如何使用RedirectAttributes在另一个控制器中调用一个控制器方法

Question

Code i have written as below.

Controller1 {
   @Autowired
   Controller2 controller2
   //Caller method
   void method1() {
      controller2.furnction1(model,redirectattributes);
   }
}

Controller2 {

   public void function1(Model model, RedirectAttributes atr){

   }
}

Question is: How to intialize RedirectAttributes ( redirectattributes )in my new Controller( Controller1 ). My Controller1 is not a form submit, so that i couldn't get RedirectAttributes by default.

How to call the funcation1 in controller2.

Answer 1

Redirect will not work here. All the form data will be lost. Try forwarding request to another URL.

try something like

    Controller1 {

   @RequestMapping("url1")
   public String method1() {
     return "forward:/url2";
   }
}

Controller2 {
   @RequestMapping("/url2")
   public String function1(Model model, RedirectAttributes atr){
      //do something
   }
}

Answer 2

In my opinion calling a Controller from another Controller is not a good practice. Try using return redirect:/function1 to call the function1 inside Controller2. If it is a common function / service try writing a helper which would do your job.

Answer 3

What RedirectAttributes as to do with POST request ?

Just add it to your first controller method as parameter.

 void method1(RedirectAttributes redirectattributes) {
  controller2.furnction1(model,redirectattributes);

}

But at the other said, it's not a good pattern, and you should use something like :

return "redirect:/some/url";