리다이렉트, 인터셉트

리다이렉트

1. 회원 정보 수정 요청
2. 지금 로그인이 되어 있나?
   1. 로그인 되어 있을 경우 회원 수정 페이지로 이동
   2. 로그인 되어 있지 않을 경우 메인 페이지로 이동 → redirect

 

// Modify @RequestMapping(value = "/modifyForm") public String modifyForm(Model model, HttpServletRequest request) {           HttpSession session = request.getSession();     Member member = (Member) session.getAttribute("member");           if(null == member) {         return "redirect:/";     } else {         model.addAttribute("member", service.memberSearch(member));     }           return "/member/modifyForm"; }

 

인터셉트

1. preHandle() → 컨트롤러가 작동하기 전 
2. postHandle() → 컨트롤러가 작동한 후
3. afterCompletion() → 컨트롤러 뷰가 다 작동한 후

 

 

• preHandle(), postHandle(), afterCompletion()

import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession;   import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;   public class MemberLoginInterceptor extends HandlerInterceptorAdapter {       @Override     public boolean preHandle(HttpServletRequest request,             HttpServletResponse response, Object handler) throws Exception {                   HttpSession session = request.getSession(false);         if(session != null) {             Object obj = session.getAttribute("member");             if(obj != null)                 return true;         }                   response.sendRedirect(request.getContextPath() + "/");         return false;     }           @Override     public void postHandle(HttpServletRequest request,             HttpServletResponse response, Object handler,             ModelAndView modelAndView) throws Exception {                   super.postHandle(request, response, handler, modelAndView);     }           @Override     public void afterCompletion(HttpServletRequest request,             HttpServletResponse response, Object handler, Exception ex)             throws Exception {                   super.afterCompletion(request, response, handler, ex);     } }

 

• servlet-context.xml

 

<interceptors>     <interceptor>         //member/modifyForm, member/removeForm은 MemberLoginInterceptor 처리를 해라         <mapping path="/member/modifyForm"/>         <mapping path="/member/removeForm"/>         <!--         //member로 들어오는곳은 전부 MemberLoginInterceptor 처리를 해라!         <mapping path="/member/**"/>         //member/joinForm은 제외 해라!         <exclude-mapping path="/member/joinForm"/>         -->         <beans:bean class="com.bs.lec21.member.MemberLoginInterceptor"/>     </interceptor> </interceptors>