public class UserController {

    @RequestMapping(value="/save8")
    @ResponseBody
    public void save8(String[] strs) {
        System.out.println(Arrays.asList(strs));

    }

    @RequestMapping(value="/save7")
    @ResponseBody
    public void save7(User user) {
        System.out.println(user);
    }


    @RequestMapping(value="/save6")
    @ResponseBody
    public void save6(String username,int age) {
        System.out.println(username);
        System.out.println(age);
    }

    @RequestMapping(value="/save5")
    public String save5(HttpServletRequest httpServletRequest) {
        httpServletRequest.setAttribute("username","请来在的话");
        return "success";
    }
    @RequestMapping(value="/save4")
    public String save4(Model model) {
        model.addAttribute("username","我来自何方nima");
        return "success";
    }
    @RequestMapping(value="/save3")
    public String save3(ModelAndView modelAndView) {
        modelAndView.addObject("username","请来在的话");
        return "success";
    }
    @RequestMapping(value="/save2")
    public ModelAndView save2() {
        ModelAndView modelAndView=new ModelAndView();
        modelAndView.addObject("username","我来自何方");
        modelAndView.setViewName("success");
        return modelAndView;
    }


    @RequestMapping(value="/save",method = {RequestMethod.GET},params = {"username"})
    public String save() {
        System.out.println("controller创建了");
        return "success";
    }
}

public class UserController {

    @RequestMapping(value="/save8")
    @ResponseBody
    public void save8(String[] strs) {
        System.out.println(Arrays.asList(strs));

    }

    @RequestMapping(value="/save7")
    @ResponseBody
    public void save7(User user) {
        System.out.println(user);
    }


    @RequestMapping(value="/save6")
    @ResponseBody
    public void save6(String username,int age) {
        System.out.println(username);
        System.out.println(age);
    }

    @RequestMapping(value="/save5")
    public String save5(HttpServletRequest httpServletRequest) {
        httpServletRequest.setAttribute("username","请来在的话");
        return "success";
    }
    @RequestMapping(value="/save4")
    public String save4(Model model) {
        model.addAttribute("username","我来自何方nima");
        return "success";
    }
    @RequestMapping(value="/save3")
    public String save3(ModelAndView modelAndView) {
        modelAndView.addObject("username","请来在的话");
        return "success";
    }
    @RequestMapping(value="/save2")
    public ModelAndView save2() {
        ModelAndView modelAndView=new ModelAndView();
        modelAndView.addObject("username","我来自何方");
        modelAndView.setViewName("success");
        return modelAndView;
    }


    @RequestMapping(value="/save",method = {RequestMethod.GET},params = {"username"})
    public String save() {
        System.out.println("controller创建了");
        return "success";
    }
}