[Spring] Spring MVC 예제

o Dependency 추가 

- Spring webmvc 링크

http://mvnrepository.com/artifact/org.springframework/spring-webmvc/4.3.9.RELEASE

- JSTL 링크

http://mvnrepository.com/artifact/jstl/jstl/1.2

---

web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">

  <display-name>spring_mvc_basic</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>

  <!-- 모든 요청을 받는 서블릿을 등록 : FrontController -->

  <servlet>

  <servlet-name>spring</servlet-name>

  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

  <load-on-startup>1</load-on-startup>

  </servlet>

  <servlet-mapping>

  <servlet-name>spring</servlet-name>

  <url-pattern>*.do</url-pattern>

  </servlet-mapping>

  <!-- Encoding 처리해주는 Filter 등록 -->

  <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>

---

spring-servlet.xml

<?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:context="http://www.springframework.org/schema/context"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

<context:component-scan base-package="domain.controller, domain.service"/>

</beans>

---

GreetingController.java

package domain.controller;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.servlet.ModelAndView;

import domain.service.GreetingService;

@Controller // <bean class="domain.controller.GreetingController">

@RequestMapping("/greeting/") //모든 Controller메소드의 URL 앞에 붙일 URL 경로.

public class GreetingController {

@Autowired

private GreetingService service;

@RequestMapping("hello.do")  //.do는 생략 가능

public String hello(){

System.out.println("hello()실행");

return "/WEB-INF/view/greeting/response.jsp";

}

@RequestMapping("greeting1.do")

public ModelAndView greeting(){

System.out.println("greeting()");

String msg = "안녕하세요. 무명씨님.";

return new ModelAndView("/WEB-INF/view/greeting/response.jsp", "result", msg);

}

@RequestMapping("greeting2.do")

public ModelAndView greeting(String name){ //name 요청파라미터 이름

System.out.println("greeting(String)");

String msg = service.getGreeting(name);

return new ModelAndView("/WEB-INF/view/greeting/response.jsp", "result", msg);

}

@RequestMapping("greeting3.do") //Controller 로직을 처리할 메소드임을 선언 - 속성의 value - 요청 URL

public ModelAndView greeting(String name, int age){

System.out.println("greeting(String,int)");

String msg = service.getGreeting(name, age);

//ModelAndView -> 응답 URL -> View, View에 전달할 값 : name-value 쌍

return new ModelAndView("/WEB-INF/view/greeting/response.jsp", "result", msg);

}

}

---

GreetingServiceImpl.java

package domain.service.impl;

import org.springframework.stereotype.Service;

import domain.service.GreetingService;

@Service

public class GreetingServiceImpl implements GreetingService {

@Override

public String getGreeting(){

return "안녕하세요... 무명씨";

}

@Override

public String getGreeting(String name){

return String.format("%s 님 안녕하세요", name);

}

@Override

public String getGreeting(String name, int age){

return String.format("%d 세 %s님 안녕하세요", age, name);

}

}

---

GreetingService

package domain.service;

public interface GreetingService {

String getGreeting();

String getGreeting(String name);

String getGreeting(String name, int age);

}

---

index.jsp

<%@ page contentType="text/html;charset=UTF-8"%>

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title>Insert title here</title>

</head>

<body>

<%

//String name = URLEncoder.encode("김영수, "UTF-8");   - 익스플로어에서 요청파라미터를 못받아오는 처리를 해주는 코드

%>

<h2>index.jsp</h2>

<a href="/spring_mvc_basic/greeting/hello.do">hello호출</a><br>

<a href="/spring_mvc_basic/greeting/greeting1.do">greeting1호출</a><br>

<a href="/spring_mvc_basic/greeting/greeting2.do?name=김영수">greeting2호출</a><br>

<a href="/spring_mvc_basic/greeting/greeting3.do?name=박영희&age=27">greeting3호출</a><br> <!-- 요청파라미터를 못받아오는 경우는 400오류를 리턴한다. -->

<hr>

<a href="<c:url value='/greeting/hello.do'/>">hello호출</a><br>

<a href="<c:url value='/greeting/greeting2.do'><c:param name='name' value='홍길동'/></c:url>">greeting2호출</a><br>

</body>

</html>

---

response.jsp

<%@ page contentType="text/html;charset=UTF-8"%>

<!DOCTYPE html>

<html>

<head>

<meta charset="UTF-8">

<title>Insert title here</title>

</head>

<body>

<a href="/spring_mvc_basic/index.jsp">index페이지</a>

<h2>Greeting Response.jsp</h2>

<h3>greeting에서의 응답 메세지 : ${requestScope.result}</h3>

</body>

</html>

---

예제 소스 파일

spring_mvc_basic.zip