AbstractController을 이용한 스프링 컨트롤러 작성
web.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | <!--?xml version="1.0" encoding="UTF-8"?--><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>spring3</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <!-- 스프링 환경 설정 시작 --> <!-- ContextLoaderListener : 서로 다른 DispatcherServlet이 공통으로 사용될 빈 설정 --> <!-- context-param 태그로 설정파일을 지정하지 않으면 applicationContext.xml이 설정 파일이 된다. --> <!-- <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/service.xml, /WEB-INF/common.xml</param-value> </context-param> --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 스프링 컨트롤러 --> <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- <init-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/dispatcher-servlet.xml, /WEB-INF/front.xml </param-value> </init-param> --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> <!-- 인코딩 필터 --> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app> |
com.hello.HelloService
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | package com.hello; public class HelloService{ public String getMessage() { String msg = null; int h = Calendar.getInstance().get(Calendar.HOUR_OF_DAY); if(h>=6 && h<9) msg = "좋은 아침"; else if(h>=9 && h<13) msg = "오전 수업 시간"; else if(h>=13 && h<14) msg = "점심"; else if(h>=14 && h<18) msg = "오후수업시간"; else msg = "자유시간"; return msg; }} |
dispatcher-servlet.xml
com.hello.HelloController
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | package com.hello; import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.AbstractController; public class HelloController extends AbstractController{ private HelloService helloService; public void setHelloService(HelloService helloService) { this.helloService = helloService; } @Override protected ModelAndView handleRequestInternal(HttpServletRequest req, HttpServletResponse resp) throws Exception { ModelAndView mav = new ModelAndView(); mav.setViewName("hello/result"); mav.addObject("msg", helloService.getMessage()); return mav; //혹은 req.setAttribute("msg", helloService); return new ModelAndView("hello/result"); } } |
WEB-INF/hello/result.jsp
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | <%@ page contentType="text/html; charset=UTF-8" %><%@ page trimDirectiveWhitespaces="true" %> <% String cp = request.getContextPath(); request.setCharacterEncoding("utf-8");%><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title> 스프링을 이용한 첫번째 MVC2 패턴 프로그래밍<br>${msg} |
설명
1. 클라이언트가 hello.action 요청
2. xml → dispatcher 호출
1 2 3 4 5 6 7 8 | <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class></servlet><servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>*.action</url-pattern></servlet-mapping> |
3. dispatcher → beanNameUrlHandlerMapping
1 2 3 | <bean id="beanNameUrlHandlerMapping" class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping"> <property name="order" value="1"> //order : 실행되는 매핑의 순서를 결정 </property></bean> |
beanNameUrlHandlerMapping은 클라이언트가 요청한 uri를 전달받는다.
전달받은 uri로 해당작업을 수행할 컨트롤러를 검색
* 매핑은 생성된 컨트롤러의 이름을 검색함.
1 2 3 4 | <bean name="/hello.action" class="com.hello.HelloController"><span> ....</span></bean><span></span> |
4. 매핑은 컨트롤러 객체를 리턴하고 dispatcher는 다시 해당 컨트롤러의 handleRequestInternal 메서드 호출
5. 호출된 컨트롤러는 프로그램된 구문을 실행하고 ModelAndView객체를 리턴한다.
1 2 3 4 5 | <bean id="helloService" class="com.hello.HelloService"><bean name="/hello.action" class="com.hello.HelloController"> <property name="helloService" ref="helloService"></property></bean></bean> |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | public class HelloController extends AbstractController{ private HelloService helloService; public void setHelloService(HelloService helloService) { this.helloService = helloService; } @Override protected ModelAndView handleRequestInternal(HttpServletRequest req, HttpServletResponse resp) throws Exception { /*ModelAndView mav = new ModelAndView(); mav.setViewName("hello/result"); mav.addObject("msg", helloService.getMessage()); return mav;*/ req.setAttribute("msg", helloService.getMessage()); return new ModelAndView("hello/result"); }} |
* 단, 여기서 dispatcher는 자식의 handleRequestInternal를 실행하는 것이 아니고
AbstractController 의 handleRequestInternal를 실행한다.
1 2 3 4 5 | AbstractController ac = new HelloController();ac.handleRequestInternal() //User user = new UserImpl()//user.result(); |
6. ModelAndView를 리턴받은 dispatcher는 resolver를 호출한다. (인자값으로 컨트롤러의 리턴값)
1 2 3 4 | <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views/"> <property name="suffix" value=".jsp"> </property></property></bean> |
1 2 3 4 | <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views/"> <property name="suffix" value=".jsp"> </property></property></bean> |
7. resolver는 prefix + "viewName" + suffix를 리턴
8. 최종적으로 dispatcher가 해당 view로 포워딩
MultiActionController을 이용한 스프링 컨트롤러 작성
예제
web.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 | <!--?xml version="1.0" encoding="UTF-8"?--><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>spring3</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <!-- 스프링 환경 설정 시작 --> <!-- ContextLoaderListener : 서로 다른 DispatcherServlet이 공통으로 사용될 빈 설정 --> <!-- context-param 태그로 설정파일을 지정하지 않으면 applicationContext.xml이 설정 파일이 된다. --> <!-- <context-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/service.xml, /WEB-INF/common.xml </param-value> </context-param> --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 스프링 컨트롤러 --> <servlet> <servlet-name>dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- <init-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/dispatcher-servlet.xml, /WEB-INF/front.xml </param-value> </init-param> --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcher</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> <!-- 인코딩 필터 --> <filter> <filter-name>encodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app> |
com.bbs.Board
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | package com.bbs; public class Board{ private int num; private String name, subject, content, created; public int getNum() { return num; } public void setNum(int num) { this.num = num; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getSubject() { return subject; } public void setSubject(String subject) { this.subject = subject; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public String getCreated() { return created; } public void setCreated(String created) { this.created = created; }} |
dispatcher-servlet.xml
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | <!--?xml version="1.0" encoding="UTF-8"?--> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util" xmlns:task="http://www.springframework.org/schema/task" xsi:schemalocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.1.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd"> <bean id="handlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"> <property name="alwaysUseFullPath" value="true"> <property name="order" value="1"> <property name="mappings"> //property : private String name, 즉 인스턴스변수 <props> //props : properties <prop key="/bbs/*.action">bbs.boardController</prop>//여기서 bbs.boardController는 value //아래에 bean으로 생성할 객체 bbs.boardController를 찾아간다. </props> </property> </property></property></bean> <bean id="bbs.boardController" class="com.bbs.BoardController"> <property name="methodNameResolver" ref="propsResolver"> </property></bean> <bean id="propsResolver" class="org.springframework.web.servlet.mvc.multiaction.PropertiesMethodNameResolver"> <property name="mappings"> <props> //props : properties <prop key="/bbs/list.action">list</prop> <prop key="/bbs/created.action">createdForm</prop> <prop key="/bbs/created_ok.action">createdSubmit</prop> </props> //propsResolver의 인스턴스변수 mappings에 각 key에 해당된 value 할당 </property> </bean> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views/"> <property name="suffix" value=".jsp"> </property></property></bean> </beans> |
com.bbs.BoardController
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | package com.bbs; import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse; import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.mvc.multiaction.MultiActionController; public class BoardController extends MultiActionController{ public ModelAndView list(HttpServletRequest req, HttpServletResponse resp) throws Exception { return new ModelAndView("bbs/list"); } public ModelAndView createdForm(HttpServletRequest req, HttpServletResponse resp) throws Exception { return new ModelAndView("bbs/write"); } public ModelAndView createdSubmit(HttpServletRequest req, HttpServletResponse resp) throws Exception { return new ModelAndView("bbs/write_ok"); }} |
view
1 2 3 4 5 6 7 | list.jsp 게시판 리스트<br><a href="<%=cp%>/bbs/created.action">글쓰기</a> |
1 2 3 4 5 6 7 8 9 10 11 | write.jsp <form action="<%=cp%>/bbs/created_ok.action" method="post"> 이름 : <input type="text" name="name"><br> 제목 : <input type="text" name="subject"><br> 내용 : <textarea rows="5" cols="60" name="content"></textarea><br> <input type="submit" value="등록"></form> |
1 2 3 4 5 6 7 8 9 10 11 | write_ok.jsp 입력한 내용 <br> 이름 : ${dto.name} <br>제목 : ${dto.subject} <br>내용 : ${dto.content}<br><a href="<%=cp%>/bbs/list.action">뒤로가기</a> |
설명
1. WEB-INF/web.xml
1 2 3 4 5 6 7 8 9 | <servlet><servlet-name>dispatcher</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class></servlet> <servlet-mapping><servlet-name>dispatcher</servlet-name><url-pattern>*.action</url-pattern></servlet-mapping> |
1) 기본적으로 스프링환경설정파일은 서블릿이름-servlet.xml 이다.
→ dispatcher-servlet.xml
2) 클라이언트가 *.action 으로 요청하면 DispatcherServlet이 처리를 담당한다.
2. MultiActionController을 이용한 스프링 컨트롤러 작성
- MultiActionController는 하나의 컨트롤러를 이용하여 여러 요청을 처리할수 있다. 예를 들어 게시판에서 글리스트, 글쓰기폼, 글저장, 글보기, 글수정폼, 글수정완료, 글삭제등의 여러 요청을 하나의 컨트롤러로 처리할수 있다.
- 클라이언트가 *.action 으로 요청할 경우 흐름
1) DispatcherServlet이 클라이언트의 요청을 받는다.
2) HandlerMapping이 클라이언트의 요청 URL을 어떤 Controller가 처리할지를 결정한다.
3) 결정된 컨트롤러는 클라이언트의 요청을 처리한 뒤, 그 결과를 DispatcherServlet에 알려준다.
4) ViewResolver는 처리 결과를 보여줄 View를 결정한다.
5) View는 처리 결과를 보여줄 응답을 생성한다.
- 프로그램 작성
1) service 클래스를 작성한다.(비지니즈 로직을 처리)
2) MultiActionController를 상속받은 controller를 작성 한다.
요청을 받아 처리할 메소드명은 프로그래머가 임의로 지정하며 다음의 형식을 따른다.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | public [ModelAndView|Map|void] 메서드이름(HttpServletRequest req, HttpServletResponse resp, [HttpSession|Command]) [throws Exception] { ......} (1) return type : ModelAndView, Map, void 중 하나(2) argument : 1- HttpServletRequest 2- HttpServletResponse 3- 선택적이며 HttpSession 또는 Command 4- Command(3) ModelAndView는 컨트롤러의 처리 결과를 보여줄 뷰와 뷰에 전달할 값을 저장할 용도로 사용된다. |
- dispatcher-servlet.xml 에서 환경 설정
1) HandlerMapping 설정
1 2 3 4 5 6 7 8 9 | <bean id="handlerMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping"><property name="alwaysUseFullPath" value="true"> <property name="order" value="1"><property name="mappings"><props><prop key="/bbs/*.action">bbs.boardController</prop></props></property></property></property></bean> |
클라이언트가 /bbs/*.action 형식으로 요청하면 bbs.boardController 라는 id를 가진 컨트롤러가 요청을 처리한다.
2) ViewResolver 설정
1 2 3 4 | <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/views/"> <property name="suffix" value=".jsp"> </property></property></bean> |
3) MethodNameResolver 등록
어떤 메소드가 클라이언트의 요청을 처리할 것인지 결정한다.
MultiActionController에서는 반드시 필요 하다.
1 2 3 4 5 6 7 8 9 10 | <bean id="propsResolver" class="org.springframework.web.servlet.mvc.multiaction.PropertiesMethodNameResolver"> <property name="mappings"> <props> <prop key="/bbs/list.action">list</prop> <prop key="/bbs/created.action">createdForm</prop> <prop key="/bbs/created_ok.action">createdSubmit</prop> </props> </property></bean> |
4) 컨트롤러 및 서비스 객체 생성
1 2 3 | <bean id="bbs.boardController" class="com.bbs.BoardController"> <property name="methodNameResolver" ref="propsResolver"> </property></bean> |
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