解決高併發-springboot-redis-mysql醫院預約系統專案超詳細講解--半個小時教你如何使用sp--第二章ringboot完成預約專案---：頁面顯示所有醫生加分類查詢功能
阿新 • • 發佈：2021-01-08
頁面顯示所有醫生(科室，頭銜)
第一步
mysql取出所有資料，由於需要分類查直接加入引數
mapper包下
介面
加@Mapper註解
public List<Doctor> selectALlDoctors(@Param("officeId") Integer officeId,
@Param("titleId") Integer titleId);//多個引數使用@Param繫結引數
xml檔案中
<resultMap id="doctorMap" type="Doctor"> <id property="doctorId" column="doctorId"/> // 通過officeId返回一個office物件 <association property="office" column="officeId" select="cn.kgc.mapper.OfficeMapper.selectOfficeById"/> // 通過titleId返回一個title物件 <association property="title" column="titleId" select="cn.kgc.mapper.TitleMapper.selectTitleById"/> </resultMap> <select id="selectALlDoctors" resultMap="doctorMap" > select * from doctor <where> <if test="officeId!=null and officeId!=0"> officeId=#{officeId} </if> <if test="titleId!=null and titleId!=0"> and titleId=#{titleId} </if> </where> </select>
officeMapper和TitleMapper
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="cn.kgc.mapper.OfficeMapper"> <select id="selectOfficeById" parameterType="Integer" resultType="Office"> select * from office where officeId = #{officeId} </select> <select id="selectAllOffices" resultType="Office"> select * from office </select> </mapper> <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="cn.kgc.mapper.TitleMapper"> <select id="selectTitleById" resultType="Title" parameterType="Integer"> select * from title where titleId = #{titleId} </select> <select id="selectAllTitles" resultType="Title"> select * from title </select> </mapper>
第二步
重點 主函式一定要加@EnableCaching註解 @EnableCaching 開啟快取
dao層緩衝區
因為醫生，科室，頭銜屬於不常變化的，所以放入快取區，頁面取值直接從redis裡取
加@Cacheable註解 可以吧資料放入快取區
CacheDaoImpl 加註解@Repository
CacheDaoIMpl
@Repository public class CacheDaoIMpl implements CacheDao{ @Autowired private DoctorMapper doctorMapper; @Autowired private OfficeMapper officeMapper; @Autowired private TitleMapper titleMapper; //Cacheable:執行此函式前先在快取中到資料，若快取中不存在則執行此函式，並將此函式的執行結果快取起來。 //key為一個表示式，#p0表示第0個引數。redis中的鍵名為value::key //string型別 @Override @Cacheable(value = "doctor-page", key = "#p0+':'+#p1+':'+#p2") //資料庫裡的鍵名為 doctor-page::0:0:1 0:0代表所有屬於科室(頭銜)的醫生 , 1 第一頁 //需要分頁 0：0：1 代表 所有的醫生的第一頁的資料 //0：0：2就是第二頁的資料，1：1：1 就是officeid為1，titleid為1，的所有醫生第一頁！！！懂了吧 public DataPage<Doctor> getAllDoctor(Integer officeId, Integer titleId, Integer pageNum, Integer pageSize) { //分頁 PageHelper.startPage(pageNum,pageSize); List<Doctor> doctors = doctorMapper.selectALlDoctors(officeId, titleId); PageInfo<Doctor> pageInfo = new PageInfo<>(doctors); //返回資料 DataPage<Doctor> dataPage = new DataPage<>(); dataPage.setDataList(pageInfo.getList()); dataPage.setRowCount((int)pageInfo.getTotal()); //總條數 dataPage.setPageCount(pageInfo.getPages()); //總頁數 dataPage.setPageNum(pageNum);//第幾頁當前頁 dataPage.setPageSize(pageSize); return dataPage; } //redis裡鍵名為office::list @Override @Cacheable(value = "offices", key = "'list'") public List<Office> getAllOffice() { return officeMapper.selectAllOffices(); } //redis裡鍵名為titles::list @Override @Cacheable(value = "titles", key = "'list'") public List<Title> getAllTitle() { return titleMapper.selectAllTitles(); } }
service層
四個方法
1.獲取所有醫生
2.獲取所有科室
3.獲取所有頭銜
4.獲取下一週的日期~
DOctorServiceImpl 加@Service註解
@Autowired //自動裝配
private CacheDao cacheDao;
@Override
public DataPage<Doctor> getAllDoctors(Integer officeId, Integer titleId, Date bookingDate, Integer pageNum, Integer pageSize) {
//快取中取出醫生
DataPage<Doctor> doctorPage = cacheDao.getAllDoctor(officeId, titleId, pageNum, pageSize);
return doctorPage;
}
@Override
public List<Office> getAllOffice() {
return cacheDao.getAllOffice();
}
@Override
public List<Title> getAllTitle() {
return cacheDao.getAllTitle();
}
@Override
public List<Date> getNextWeek() {
Calendar instance = Calendar.getInstance(); //獲取當前時間
List<Date> list = new ArrayList<>();
for (int o = 0; o < 7; o++) {
instance.add(Calendar.DATE,1); //加一天
list.add(instance.getTime()); //getTime 轉換成Date
}
return list;
}
最後一步Controller
獲取所有醫生~
因為剛進頁面，引數是沒有的，防止空指標異常，需要給預設值，pagesize預設值是在application.properties配置中寫的，需要用 @Value引用
@Autowired
private DoctorService doctorService;
//@value:引用配置檔案中的配置變數
@Value("${doctor.page.size}")
private Integer pageSize;
@RequestMapping("all_doctors")
public String getAllDoctors(Integer officeId, Integer titleId, Integer pageNum,
@DateTimeFormat(pattern = "yyyy-MM-dd") Date bookingDate,Model model){
Integer page = pageNum==null? 1 : pageNum;
Integer fid = officeId==null? 0 : officeId;
Integer tid = titleId==null? 0 : titleId;
Date date = bookingDate;
if (date == null) {
//計算明天的日期
Calendar instance = Calendar.getInstance();
instance.add(Calendar.DATE,1); //加一天
date = instance.getTime();
}
//獲取所有醫生
DataPage<Doctor> doctorPage = doctorService.getAllDoctors(fid, tid, date, page, pageSize);//pae
//獲取所有科室，頭銜
List<Office> offices = doctorService.getAllOffice();
List<Title> titles = doctorService.getAllTitle();
//獲取下一週
List<Date> weekday = doctorService.getNextWeek();
model.addAttribute("doctorPage",doctorPage);
model.addAttribute("offices",offices);
model.addAttribute("titles",titles);
model.addAttribute("weekday",weekday);
//把 值傳回頁面，方便做回顯 ~
model.addAttribute("officeId",fid);
model.addAttribute("titleId",tid);
return "all_doctors";
}
最後再說一下回顯的問題
判斷一下如果後臺傳過來的id等於迴圈的id加selected字串 新增選中狀態就可以了
${(officeId==o.officeId)?string(“selected”,"")}
okok第一步完成啦 現在只有一個功能 就是查詢~
最後發一下頁面
all_doctors.ftl
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- Bootstrap CSS -->
<#--引用路徑無需寫static-->
<link rel="stylesheet" href="/css/bootstrap.min.css">
<script src="/js/jquery.min.js"></script>
<script src="/js/popper.min.js"></script>
<script src="/js/bootstrap.min.js"></script>
<title>醫大附院預約系統</title>
<script type="text/javascript">
<#--function getPage(page) {-->
<#-- location.href="/all_doctors?pageNum="+page+"&officeId=${officeId}&titleId=${titleId}&bookingDate="+$("#booking-date").val();-->
<#--}-->
</script>
</head>
<body>
<div id="login-button" class="text-right pt-3 pr-5">
<#if user??>
<h4>歡迎您：${user.name}</h4>
<#else>
<button type="button" class="btn btn-sm btn-outline-primary" data-toggle="modal" data-target="#loginModal">登入系統</button>
</#if>
</div>
<h1 class="text-center pt-1 pb-5">醫大附院預約系統</h1>
<div class="container">
<div class="row">
<div class="col-md-9">
<form action="/all_doctors" method="post" class="form-inline">
<div class="form-group">
<label>科室查詢：</label>
<select class="form-control" name="officeId">
<option value="0">全部科室</option>
<#list offices as o>
<option value="${o.officeId}" ${(officeId==o.officeId)?string("selected","")}>${o.officeName}</option>
</#list>
</select>
<label>職稱查詢：</label>
<select class="form-control" name="titleId">
<option value="0">全部職稱</option>
<#list titles as t>
<option value="${t.titleId}" ${(titleId==t.titleId)?string("selected","")}>${t.titleName}</option>
</#list>
</select>
<button type="submit" class="btn btn-outline-secondary">查詢</button>
</div>
</form>
</div>
<div class="col-md-3">
<form class="form-inline">
<div class="form-group">
<label>預約日期:</label>
<select class="form-control" id="booking-date" name="bookingDate" onchange="getTotal(this)">
<#list weekday as d>–>
<option value="${d?string("yyyy-MM-dd")}">
${d?string("yyyy-MM-dd")}
</option>
</#list>–>
</select>
</div>
</form>
</div>
</div>
<hr/>
<ul class="list-unstyled">
<#list doctorPage.dataList as d>
<li class="media my-4">
<img src="\images\ico.jpg" width="120px" class="align-self-center mr-3" alt="...">
<div class="media-body">
<h3 class="mt-0 mb-2">${d.name}（${d.title.titleName}）</h3>
<div class="row">
<div class="col-md-9">簡介：${d.summary}</div>
<div class="col-md-2 text-center">
<h4>餘號:<span id="total-${d.doctorId}" style="color:red">${d.total}</span></h4>
<button type="button" onclick="addBooking(${d.doctorId})" class="btn btn-outline-primary">預約掛號</button>
</div>
</div>
</div>
</li>
</#list>
</ul>
<nav class="pb-5 pt-3">
<ul class="pagination justify-content-center">
<#if doctorPage.pageNum == 1>
<li class="page-item disabled">
<a class="page-link" href="javascript:void(0);" tabindex="-1">首頁</a>
</li>
<#else>
<li class="page-item">
<a class="page-link" onclick="getPage(1)" href="javascript:void(0)" tabindex="-1">首頁</a>
</li>
</#if>
<#--c:foreach begin="1" end="${doctorPage.pageCount}" var="i" -->
<#list 1..doctorPage.pageCount as i>
<#if doctorPage.pageNum == i>
<li class="page-item active">
<a class="page-link" href="javascript:void(0);">${i}</a>
</li>
<#else>
<li class="page-item">
<a class="page-link" onclick="getPage(${i})" href="javascript:void(0)">${i}</a>
</li>
</#if>
</#list>
<#if doctorPage.pageNum == doctorPage.pageCount>
<li class="page-item disabled">
<a class="page-link" href="javascript:void(0);" tabindex="-1">末頁</a>
</li>
<#else>
<li class="page-item">
<a class="page-link" onclick="getPage(${doctorPage.pageCount})" href="javascript:void(0)" tabindex="-1">末頁</a>
</li>
</#if>
</ul>
</nav>
</div>
<!-- 模態框 -->
<div class="modal fade" id="loginModal">
<div class="modal-dialog">
<form id="login-form">
<div class="modal-content">
<!-- 模態框頭部 -->
<div class="modal-header">
<h4 class="modal-title">使用者登入</h4>
<button type="button" class="close" data-dismiss="modal">×</button>
</div>
<!-- 模態框主體 -->
<div class="modal-body">
<div class="form-group">
<input type="text" class="form-control" name="username" placeholder="請輸入使用者名稱">
</div>
<div class="form-group">
<input type="password" class="form-control" name="password" placeholder="請輸入密碼">
</div>
</div>
<!-- 模態框底部 -->
<div class="modal-footer">
<button type="submit" onclick="userLogin()" class="btn btn-primary">登入</button>
<button type="button" class="btn btn-secondary" data-dismiss="modal">關閉</button>
</div>
</div>
</form>
</div>
</div>
</body>
</html>
就這麼多，很基礎很菜，自己做一下總結，有問題隨便問看到第一時間回覆