@Controller : 요청에 따른 Method 형식과 응답

요청 : GET 요청

@Controller

public ModelAndView method()

{

        return new ModelAndView("view-name");
}

 

@Controller
public String method() 

{

        return "view-name";
}

---

요청 : 쿼리 파라미터 GET 요청, <form> POST 요청

@Controller

public ModelAndView method(HttpServletRequest request, HttpServletResponse response)

{

        int age = Integer.parseInt(request.getParameter("age"));

        Member member = new Member(age);

 

        ModelAndView mv = new ModelAndView("view-name");

        mv.addObject("member", member);
        return "view-name";
}

 

@Controller

public String method(@RequestParam("age") int age, Model model) 

{

        Member member = new Member(age);

        model.addAttribute("member", member);
        return "view-name";
}

 

@Controller

public String method(@ModelAttribute Member member, Model model)

{

        model.addAttribute("member", member);
        return "view-name";
}

 

@Controller

public String method(@ModelAttribute("member") Member member, Model model)

{

        model.addAttribute("member", member);
        return "view-name";
}

 

@Controller

public String method(@ModelAttribute("member") Member member, Model model)

{

        model.addAttribute("member", member);
        return "view-name";
}

---

요청 : HTTP Message Body에 단순 텍스트 POST 요청 

※ 쿼리 파라미터 GET 요청, <form> POST 요청과 다르게 HTTP Message Body 요청은 @RequestParam, @ModelAttribute 사용 불가

 

@Controller

public void method(HttpServletRequest request, HttpServletResponse response)

{

        ServletInputStream inputStream = request.getInputStream();

        String messageBody = StreamUtils.copyToString(inputStream, StandardCharsets.UTF-8);
        response.getWriter().write("ok");
}

 

@Controller

public void method(InputStream inputStream, Wirter responseWriter)

{

        String messageBody = StreamUtils.copyToString(inputStream, StandardCharsets.UTF-8);
        responseWriter.write("ok");
}

 

@Controller

public HttpEntity<String> method(HttpEntity<String> httpEntity)

{

        String messageBody = httpEntity.getBody();
        return new HttpEntity<>("ok");

}

 

@Controller

public HttpEntity<String> method(HttpEntity<String> httpEntity)

{

        String messageBody = httpEntity.getBody();
        return new ResponseEntity<>("ok", HttpStatus.OK);

}

 

@Controller

@ReponseBody

public String method(@RequestBody String messageBody)

{       

        return "ok";
}

---

요청 : HTTP Message Body에 JSON POST 요청

@Controller

public void method(HttpServletRequest request, HttpServletResponse response)

{

        ServletInputStream inputStream = request.getInputStream();

        String messageBody = StreamUtils.copyToString(inputStream, StandardCharsets.UTF-8);

 

        Member member = objectMapper.readValue(messageBody, Member.class());
        response.getWriter().write("ok");
}

 

@Controller

@ResponseBody

public void method(@RequestBody String messageBody)

{

        Member member = objectMapper.readValue(messageBody, Member.class());
        return "ok";
}

 

@Controller

@ResponseBody

public String method(HttpEntity<Member> member)

{

        Member member = httpEntity.getBody();
        return "ok";
}

 

@Controller

@ResponseBody

public void method(@RequestBody Member member)

{       

        return "ok";
}

 

@Controller

@ResponseStatus(HttpStatus.OK)

@ResponseBody

public Member method(@RequestBody Member member)

{       

        return member;
}

 

@RequestBody 요청

• JSON 요청 -> HTTP 메세지 컨버터 -> 객체

@RequestBody 요청

• 객체 -> HTTP 메세지 컨버터 -> JSON 응답