301跳转
@GetMapping("getA")
public String getA(){
return "A";
}
@GetMapping("getBToA")
public ModelAndView getBToA(){
RedirectView redirectView=new RedirectView("/getA");
redirectView.setStatusCode(HttpStatus.MOVED_PERMANENTLY);
ModelAndView view=new ModelAndView();
view.setView(redirectView);
return view;
}