Controller

package kr.or.ddit.controller.noticeboard.web;

import javax.inject.Inject;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import kr.or.ddit.controller.noticeboard.service.INoticeService;
import kr.or.ddit.vo.NoticeVO;
import lombok.extern.slf4j.Slf4j;

@Controller
@RequestMapping("/notice")
@Slf4j
public class NoticeRetrieveController {
	
	@Inject
	private INoticeService noticeService;
	
	@RequestMapping(value="/list.do")
	public String noticeList() {
		log.info("noticeList() 실행...!");
		// 해당경로는 tiles 에서 설정한 경로 이름 
		return "notice/list";
	}
	
	**//상세보기 메소드**
	@RequestMapping(value="/detail.do")
	public String noticeDetail(int boNo, Model model) {
		NoticeVO noticeVO = noticeService.selectNotice(boNo);
		model.addAttribute("notice", noticeVO);
		return "notice/detail";
	}
}

Service

package kr.or.ddit.controller.noticeboard.service;

import javax.inject.Inject;

import org.apache.commons.io.input.TaggedInputStream;
import org.springframework.stereotype.Service;

import kr.or.ddit.ServiceResult;
import kr.or.ddit.controller.noticeboard.web.TelegramSendController;
import kr.or.ddit.mapper.NoticeMapper;
import kr.or.ddit.vo.NoticeVO;

@Service
public class NoticeServiceImpl implements INoticeService {
	
	@Inject
	private NoticeMapper noticeMapper;
	
	TelegramSendController tst = new TelegramSendController();
	
	@Override
	public ServiceResult insertNotice(NoticeVO noticeVO) {
		ServiceResult result = null;
		int status = noticeMapper.insertNotice(noticeVO);
		if(status > 0) {
			// 성공 했다는 메시지를 텔레그램 BOT API를 이용하여 알림!
			try {
				tst.sendGet("조성희", noticeVO.getBoTitle());
			} catch (Exception e) {
				e.printStackTrace();
			}
			result = ServiceResult.OK;
		}else {
			result = ServiceResult.FAILED;
		}
		return result;
	}

**// 조회수 증가와 상세보기 서비스**
	@Override
	public NoticeVO selectNotice(int boNo) {
		noticeMapper.incrementHit(boNo);  //조회수 증가
		return noticeMapper.selectNotice(boNo);
	}

}

Mapper

package kr.or.ddit.mapper;

import kr.or.ddit.vo.NoticeVO;

public interface NoticeMapper {
	public int insertNotice(NoticeVO noticeVO);
	public int incrementHit(int boNo);
	public NoticeVO selectNotice(int boNo);
}

NoticeMapper (SQL)

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

<!DOCTYPE mapper
  PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
  "<https://mybatis.org/dtd/mybatis-3-mapper.dtd>">
 <mapper namespace="kr.or.ddit.mapper.NoticeMapper">
 	
	
<resultMap type="noticeVO" id="noticeMap">
 		<id property="boNo" column="bo_no"/>
 		<result property="boNo" column="bo_no"/>
 		<result property="boTitle" column="bo_title"/>
 		<result property="boContent" column="bo_content"/>
 		<result property="boWriter" column="bo_writer"/>
 		<result property="boDate" column="bo_date"/>
 		<result property="boHit" column="bo_hit"/>
 		
 		<collection property="noticeFileList" resultMap="noticeFileMap"/>
 	</resultMap>
 	
 	<resultMap type="noticeFileVO" id="noticeFileMap">
 		<id property="fileNo" column="file_no"/>
 		<result property="fileNo" column="file_no"/>
 		<result property="fileName" column="file_name"/>
 		<result property="fileSize" column="file_size"/>
 		<result property="fileFancysize" column="file_fancysize"/>
 		<result property="fileMime" column="file_mime"/>
 		<result property="fileSavepath" column="file_savepath"/>
 		<result property="fileDowncount" column="file_downcount"/>
 	</resultMap>

 	<!-- 공지사항 등록하는 쿼리 -->
 	<insert id="insertNotice" parameterType="noticeVO" useGeneratedKeys="true">
 		<selectKey keyProperty="boNo" resultType="int" order="BEFORE">
 			select seq_notice.nextval from dual
 		</selectKey>
 		insert into notice(
 			bo_no, bo_title, bo_content, bo_writer, bo_date
 		)values(
 			#{boNo}, #{boTitle}, #{boContent}, #{boWriter}, sysdate
 		)
 	</insert>
 	
 	**<!-- 조회수 증가 쿼리 -->**
 	<update id="incrementHit" parameterType="int">
 		update notice
 		set
 			bo_hit = bo_hit + 1
 		where bo_no = #{boNo}
 	</update>
 	
 	**<!-- 상세보기 쿼리 -->**
<select id="selectNotice" parameterType="int" resultMap="noticeMap">
 		select
 			n.bo_no, bo_title, bo_content, bo_writer,
 			to_char(bo_date, 'yy-mm-dd hh24:mi:ss') bo_date, bo_hit,
 			file_no, file_name, file_size, file_fancysize, file_mime, file_savepath, file_downcount
 		from notice n left outer join noticefile nf on(n.bo_no = nf.bo_no)
 		where n.bo_no = #{boNo}
 	</select>
 </mapper>

JSP 페이지

<%@page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<%@ taglib uri="<http://tiles.apache.org/tags-tiles>" prefix="tiles" %>
<%@ taglib uri="<http://java.sun.com/jsp/jstl/core>" prefix="c" %>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>AdminLTE 3 | Simple Tables</title>

<link rel="stylesheet" href="<https://fonts.googleapis.com/css?family=Source+Sans+Pro:300,400,400i,700&display=fallback>">
<link rel="stylesheet" href="${pageContext.request.contextPath }/resources/plugins/fontawesome-free/css/all.min.css">
<link rel="stylesheet" href="${pageContext.request.contextPath }/resources/dist/css/adminlte.min.css">
<script src="${pageContext.request.contextPath }/resources/plugins/jquery/jquery.min.js"></script>
<script src="${pageContext.request.contextPath }/resources/ckeditor/ckeditor.js"></script>
</head>
<c:if test="${not empty message }">
<script type="text/javascript">
	alert("${message}");
	<c:remove var="message" scope="request"/>
	<c:remove var="message" scope="session"/>
</script>
</c:if>
<body class="hold-transition sidebar-mini">
	<div class="wrapper">
		<!-- header 영역 -->
		<tiles:insertAttribute name="header"/>
		<div class="content-wrapper">
			<!-- content 영역 -->
			<tiles:insertAttribute name="content"/>
		</div>
		<!--  footer 영역 -->
		<tiles:insertAttribute name="footer"/>

		<aside class="control-sidebar control-sidebar-dark">
		</aside>
	</div>

	<script src="${pageContext.request.contextPath }/resources/plugins/bootstrap/js/bootstrap.bundle.min.js"></script>
	<script src="${pageContext.request.contextPath }/resources/dist/js/adminlte.min.js"></script>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<%@ taglib uri="<http://java.sun.com/jsp/jstl/core>" prefix="c" %>
<!-- Content Header (Page header) -->
<section class="content-header">
	<div class="container-fluid">
		<div class="row mb-2">
			<div class="col-sm-6">
				<h1>공지사항 상세보기</h1>
			</div>
			<div class="col-sm-6">
				<ol class="breadcrumb float-sm-right">
					<li class="breadcrumb-item"><a href="#">DDIT HOME</a></li>
					<li class="breadcrumb-item active">공지사항 상세보기</li>
				</ol>
			</div>
		</div>
	</div>
	<!-- /.container-fluid -->
</section>

<!-- Main content -->
<section class="content">
	<div class="container-fluid">
		<div class="row">
			<div class="col-md-12">
				<div class="card card-primary">
					<div class="card-header">
						<h3 class="card-title">${notice.boTitle }</h3>
						<div class="card-tools">${notice.boWriter } ${notice.boDate } ${notice.boHit }</div>
					</div>
					<form id="quickForm" novalidate="novalidate">
						<div class="card-body">${notice.boContent }</div>
						<div class="card-footer bg-white">
							<ul	class="mailbox-attachments d-flex align-items-stretch clearfix">
								<c:if test="${not empty notice.noticeFileList }">
									<c:forEach items="${notice.noticeFileList }" var="noticeFile" varStatus="vs">
										<li>
											<span class="mailbox-attachment-icon">
												 <i class="far fa-file-pdf"></i>
											</span>
											<div class="mailbox-attachment-info">
												<a href="#" class="mailbox-attachment-name">
													<i	class="fas fa-paperclip"></i> ${noticeFile.fileName }
												</a> 
												<span class="mailbox-attachment-size clearfix mt-1"> 
													<span>${noticeFile.fileFancysize }</span>
													<c:url value="/notice/download.do" var="downloadURL">
														<c:param name="fileNo" value="${noticeFile.fileNo }"/>
													</c:url>
													<a href="${downloadURL }">
													  <span	class="btn btn-default btn-sm float-right"> 
													 	 <i class="fas fa-download"></i>
													  </span>
													</a>
												</span>
										    </div>
										</li>
									</c:forEach>
								</c:if>
							</ul>
						</div>
						<div class="card-footer">
							<button type="button" id="btnList" class="btn btn-primary">목록</button>
							<button type="button" id="btnModify" class="btn btn-info">수정</button>
							<button type="button" id="btnDelete" class="btn btn-danger">삭제</button>
						</div>
					</form>
				</div>
			</div>
			<form action="/notice/delete.do" method="post" id="noticeForm">
				<input type="hidden" name="boNo" value="${notice.boNo }">
			</form>
			<div class="col-md-6"></div>
		</div>
	</div>
</section>

<script>
$(function(){
	var btnList = $("#btnList");
	var btnModify = $("#btnModify");
	var btnDelete = $("#btnDelete");
	var noticeForm = $("#noticeForm");
	
	// 목록 버튼 클릭 시 이벤트
	btnList.on("click", function(){
		location.href = "/notice/list.do"
	});
	
	// 수정 버튼 클릭 시 이벤트
	btnModify.on("click", function(){
		noticeForm.attr("method", "get");
		noticeForm.attr("action", "/notice/update.do");
		noticeForm.submit();
	});
	
	// 삭제 버튼 클릭 시 이벤트
	btnDelete.on("click", function(){
		if(confirm("정말 삭제하시겠습니까?")){
			noticeForm.submit();
		}
	});
});
</script>

CKEDITOR 파일