의존성 주입 - XML

클래스 파일 및 생성

BoardDAO.java

BoardService.java

BoardServiceImpl.java

Board.java

HomeController.java

home.jsp

root-context.xml 에서 빈 등록

BoardDAO.java

BoardServiceImpl.java

BoardDAO 빈을 참조하여, 빈을 등록

의존성 자동 주입

클래스 파일 생성

BoardDAO.java

BoardService.java

BoardServiceImpl.java

Board.java

HomeController.java

BoardDAO.java

package com.aloha.spring.dao;

import java.util.ArrayList;
import java.util.List;

import com.aloha.spring.dto.Board;

public class BoardDAO {
	
	// 빈으로 등록될 때, 생성될 기본 생성자 정의
	public BoardDAO() {
		
	}
	
	public List<Board> list() {
		List<Board> boardList = new ArrayList<Board>();
		boardList.add(new Board("제목01","작성자01","내용01"));
		boardList.add(new Board("제목02","작성자02","내용02"));
		boardList.add(new Board("제목03","작성자03","내용03"));
		
		System.out.println("BoardDAO 실행됨...");
		return boardList; 
	}

}
Java
복사

BoardService.java

package com.aloha.spring.service;

import java.util.List;

import com.aloha.spring.dto.Board;

public interface BoardService {

	// 게시글 목록
	public List<Board> list();
	
}
Java
복사

BoardServiceImpl.java

package com.aloha.spring.service;

import java.util.List;

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

import com.aloha.spring.dao.BoardDAO;
import com.aloha.spring.dto.Board;

public class BoardServiceImpl implements BoardService {
	
	// BoardServiceImpl --> BoardDAO 에 의존
	private BoardDAO boardDAO;
	
	// 의존성 자동 주입
	// - BoardDAO 빈을 참조하다면, 
	//   <bean><constructor-arg ref="boardDAO" /></bean>
	@Autowired
	public BoardServiceImpl(BoardDAO boardDAO) {
		this.boardDAO = boardDAO;
	}
	
//	@Autowired
//	public BoardServiceImpl(int test) {
//		this.test = test;
//	}

	@Override
	public List<Board> list() {
		return boardDAO.list();
	}

}
Java
복사

Board.java

package com.aloha.spring.dto;

public class Board {

	private String title;
	private String writer;
	private String content;
	
	public Board() {
		
	}
	
	public Board(String title, String writer, String content) {
		this.title = title;
		this.writer = writer;
		this.content = content;
	}
	
	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public String getWriter() {
		return writer;
	}

	public void setWriter(String writer) {
		this.writer = writer;
	}

	public String getContent() {
		return content;
	}

	public void setContent(String content) {
		this.content = content;
	}

	@Override
	public String toString() {
		return "Board [title=" + title + ", writer=" + writer + ", content=" + content + "]";
	}
	
	
}
Java
복사

HomeController.java

package com.aloha.spring;

import java.text.DateFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.aloha.spring.dto.Board;
import com.aloha.spring.service.BoardService;
import com.aloha.spring.service.BoardServiceImpl;

/**
 * Handles requests for the application home page.
 */
@Controller
public class HomeController {
	
	private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
	
	private BoardService boardService;

	@Autowired
	public HomeController(BoardService boardService) {
		this.boardService = boardService;
	}
	
	@RequestMapping(value = "/", method = RequestMethod.GET)
	public String home(Locale locale, Model model) {
		logger.info("Welcome home! The client locale is {}.", locale);
		
		Date date = new Date();
		DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);
		String formattedDate = dateFormat.format(date);
		model.addAttribute("serverTime", formattedDate );
		
		// 게시글 목록 조회 요청
		List<Board> boardList = boardService.list();
		model.addAttribute("boardList", boardList);
		
		if( boardList != null )
			for (Board board : boardList) {
				logger.info("board - " + board);
			}
		
		return "home";
	}
	
}
Java
복사

home.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page session="false" %>
<html>
<head>
	<title>Home</title>
</head>
<body>
	<h1>
		Hello world!  
	</h1>
	
	<P>  The time on the server is ${serverTime}. </P>
	<hr>
	<table border="1">
		<tr>
			<th>제목</th>
			<th>작성자</th>
			<th>내용</th>
		</tr>
		<c:forEach var="board" items="${ boardList }" >
			<tr>
				<td>${ board.title }</td>
				<td>${ board.writer }</td>
				<td>${ board.content }</td>
			</tr>
		</c:forEach>	
	</table>
	
</body>
</html>
HTML
복사