案例分析
1)、默認訪問首頁
//使用WebMvcConfigurerAdapter可以來擴展SpringMVC的功能
//@EnableWebMvc 不要接管SpringMVC
@Configuration
public class MyMvcConfig extends WebMvcConfigurerAdapter {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/yjsj").setViewName("success");
}
@Bean
public WebMvcConfigurer webMvcConfigurer(){
WebMvcConfigurer webMvcConfigurer = new WebMvcConfigurer() {
//註冊視圖映射組件
@Override
public void addViewControllers(ViewControllerRegistry registry) {
//後面的setView如同controller的返回值
registry.addViewController("/").setViewName("index");
registry.addViewController("/index.html").setViewName("index");
registry.addViewController("/main.html").setViewName("dashboard");
}
}
2)、國際化
1)、編寫國際化配置文件;
2)、使用ResourceBundleMessageSource管理國際化資源文件 3)、在頁面使用fmt:message取出國際化內容
步驟:
1)、編寫國際化配置文件,抽取頁面需要顯示的國際化消息
2).springboot已經幫我們配好了管理國際化資源的文件
3)、去頁面獲取國際化的值;
效果:根據瀏覽器語言設置的信息切換了國際化;
原理:
國際化Locale(區域信息對象);LocaleResolver(獲取區域信息對象);
4)、點擊鏈接切換國際化
/**
* 可以在連接上攜帶區域信息
*/
public class MyLocaleResolver implements LocaleResolver {
@Override
public Locale resolveLocale(HttpServletRequest request) {
String l = request.getParameter("l");
Locale locale = Locale.getDefault();
if(!StringUtils.isEmpty(l)){
String[] split = l.split("_");
locale = new Locale(split[0],split[1]);
}
return locale;
}
@Override
public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
}
}
@Bean
public LocaleResolver localeResolver(){
return new MyLocaleResolver();
}
}
3)、登陸
開發期間模板引擎頁面修改以後,要實時生效
1)、禁用模板引擎的緩存
# 禁用緩存
spring.thymeleaf.cache=false
2)、頁面修改完成以後ctrl+f9:重新編譯;
4)、攔截器進行登陸檢查
攔截器
/**
* 登陸檢查,
*/
public class LoginHandlerInterceptor implements HandlerInterceptor {
//目標方法執行之前
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
Object user = request.getSession().getAttribute("loginUser");
if(user == null){
//未登陸,返回登陸頁面
request.setAttribute("msg","沒有權限請先登陸");
request.getRequestDispatcher("/index.html").forward(request,response);
return false;
}else{
//已登陸,放行請求
return true;
}
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
}
}
註冊攔截器
//所有的WebMvcConfigurerAdapter組件都會一起起作用
@Bean //將組件註冊在容器
public WebMvcConfigurerAdapter webMvcConfigurerAdapter(){
WebMvcConfigurerAdapter adapter = new WebMvcConfigurerAdapter() {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("login");
registry.addViewController("/index.html").setViewName("login");
registry.addViewController("/main.html").setViewName("dashboard"); }
//註冊攔截器
@Override
public void addInterceptors(InterceptorRegistry registry) {
//super.addInterceptors(registry);
//靜態資源; *.css , *.js
//SpringBoot已經做好了靜態資源映射
registry.addInterceptor(new
LoginHandlerInterceptor()).addPathPatterns("/**")
//Springboot2以後對wabjars內容也會攔截
.excludePathPatterns("/index.html","/","/user/login","/webjars/**"
);
}
};
return adapter;
}
5)、CRUD-員工列表
實驗要求:
1)、RestfulCRUD:CRUD滿足Rest風格;
URI: /資源名稱/資源標識 HTTP請求方式區分對資源CRUD操作
項目 | 普通CRUD(uri來區分操作) | RestfulCRUD |
---|---|---|
查詢 | getEmp | emp—GET |
添加 | addEmp?xxx | emp—POST |
修改 | updateEmp?id=xxx&xxx=xx | emp/{id}—PUT |
刪除 | deleteEmp?id=1 | emp/{id}—DELETE |
2)、實驗的請求架構;
項目 | 請求URI | 請求方式 |
---|---|---|
查詢所有員工 | emps | GET |
查詢某個員工(來到修改頁面) | emp/1 | GET |
來到添加頁面 | emps | GET |
添加員工 | emp | POST |
來到修改頁面(查出員工進行信息回顯) | emp/1 | GET |
修改員工 | emp | PUT |
刪除員工 | emp/1 | DELETE |
3)、員工列表:
thymeleaf公共頁面元素抽取
1、抽取公共片段
<div th:fragment="copy">
© 2011 The Good Thymes Virtual Grocery
</div>
2、引入公共片段
<div th:insert="~{footer :: copy}"></div>
~{templatename::selector}:模板名::選擇器
~{templatename::fragmentname}:模板名::片段名
3、默認效果:
insert的公共片段在div標籤中
如果使用th:insert等屬性進行引入,可以不用寫~{}: 行內寫法可以加上:[[~{}]];[(~{})];
三種引入公共片段的th屬性:
th:insert:將公共片段整個插入到聲明引入的元素中 th:replace:將聲明引入的元素替換爲公共片段
th:include:將被引入的片段的內容包含進這個標籤中
<footer th:fragment="copy">
© 2011 The Good Thymes Virtual Grocery </footer>
引入方式
<div th:insert="footer :: copy"></div>
<div th:replace="footer :: copy"></div>
<div th:include="footer :: copy"></div>
效果
<div>
<footer>
© 2011 The Good Thymes Virtual Grocery </footer>
</div>
<footer>
© 2011 The Good Thymes Virtual Grocery
</footer>
<div>
© 2011 The Good Thymes Virtual Grocery
</div>
引入片段的時候傳入參數:
<nav class="col‐md‐2 d‐none d‐md‐block bg‐light sidebar" id="sidebar">
<div class="sidebar‐sticky">
<ul class="nav flex‐column">
<li class="nav‐item">
<a class="nav‐link active"
th:class="${activeUri=='main.html'?'nav‐link active':'nav‐link'}"
href="#" th:href="@{/main.html}">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke‐width="2" stroke‐ linecap="round" stroke‐linejoin="round" class="feather feather‐home">
<path d="M3 9l9‐7 9 7v11a2 2 0 0 1‐2 2H5a2 2 0 0 1‐2‐2z"></path> <polyline points="9 22 9 12 15 12 15 22"></polyline>
</svg>
Dashboard <span class="sr‐only">(current)</span>
</a>
</li>
<!‐‐引入側邊欄;傳入參數‐‐>
<div th:replace="commons/bar::#sidebar(activeUri='emps')"></div>
6)、CRUD-員工添加
- 添加頁面
<!DOCTYPE html>
<!-- saved from url=(0052)http://getbootstrap.com/docs/4.0/examples/dashboard/ -->
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<meta name="description" content="">
<meta name="author" content="">
<title>Dashboard Template for Bootstrap</title>
<!-- Bootstrap core CSS -->
<link th:href="@{/webjars/bootstrap/4.4.1-1/css/bootstrap.css}" rel="stylesheet">
<!-- Custom styles for this template -->
<link th:href="@{asserts/css/dashboard.css}" rel="stylesheet">
<style type="text/css">
/* Chart.js */
@-webkit-keyframes chartjs-render-animation {
from {
opacity: 0.99
}
to {
opacity: 1
}
}
@keyframes chartjs-render-animation {
from {
opacity: 0.99
}
to {
opacity: 1
}
}
.chartjs-render-monitor {
-webkit-animation: chartjs-render-animation 0.001s;
animation: chartjs-render-animation 0.001s;
}
</style>
</head>
<body>
<!-- 引入抽取的topBar -->
<!-- 模板名:使用thymeleaf的前後綴配置規則進行解析-->
<!-- ~{模板名::抽取塊名} -->
<div th:replace="commons/bar::topBar"></div>
<div class="container-fluid">
<div class="row">
<div th:replace="commons/bar::#leftBar(activeUri='emps')"></div>
<main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4">
<!--需要區分是員工修改還是添加;-->
<form th:action="@{/emp}" method="post">
<!--發送put請求修改員工數據-->
<!--
1、SpringMVC中配置HiddenHttpMethodFilter;(SpringBoot自動配置好的)
2、頁面創建一個post表單
3、創建一個input項,name="_method";值就是我們指定的請求方式
-->
<input type="hidden" name="_method" value="put" th:if="${emp!=null}"/>
<input type="hidden" name="id" th:if="${emp!=null}" th:value="${emp.id}">
<div class="form-group">
<label>LastName</label>
<input name="lastName" type="text" class="form-control" placeholder="zhangsan" th:value="${emp!=null}?${emp.lastName}">
</div>
<div class="form-group">
<label>Email</label>
<input name="email" type="email" class="form-control" placeholder="[email protected]" th:value="${emp!=null}?${emp.email}">
</div>
<div class="form-group">
<label>Gender</label><br/>
<div class="form-check form-check-inline">
<input class="form-check-input" type="radio" name="gender" value="1" th:checked="${emp!=null}?${emp.gender==1}">
<label class="form-check-label">男</label>
</div>
<div class="form-check form-check-inline">
<input class="form-check-input" type="radio" name="gender" value="0" th:checked="${emp!=null}?${emp.gender==0}">
<label class="form-check-label">女</label>
</div>
</div>
<div class="form-group">
<label>department</label>
<!--提交的是部門的id-->
<select class="form-control" name="department.id">
<option th:selected="${emp!=null}?${dep.id == emp.department.id}" th:value="${dep.id}" th:each="dep:${deps}" th:text="${dep.departmentName}">1</option>
</select>
</div>
<div class="form-group">
<label>Birth</label>
<input name="birth" type="text" class="form-control" placeholder="zhangsan" th:value="${emp!=null}?${#dates.format(emp.birth, 'yyyy-MM-dd HH:mm')}">
</div>
<button type="submit" class="btn btn-primary" th:text="${emp!=null}?'修改':'添加'">添加</button>
</form>
</main>
</div>
</div>
<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script type="text/javascript" src="asserts/js/jquery-3.2.1.slim.min.js" th:src="@{/webjars/jquery/3.4.1/jquery.js}"></script>
<script type="text/javascript" src="asserts/js/popper.min.js" th:src="@{/webjars/popper.js/2.0.2/cjs/popper.js}"></script>
<script type="text/javascript" src="asserts/js/bootstrap.min.js" th:src="@{/webjars/bootstrap/4.4.1-1/js/bootstrap.js}"></script>
<!-- Icons -->
<script type="text/javascript" src="asserts/js/feather.min.js" th:src="@{/asserts/js/feather.min.js}"></script>
<script>
feather.replace()
</script>
<!-- Graphs -->
<script type="text/javascript" th:src="@{asserts/js/Chart.min.js}"></script>
<script>
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'line',
data: {
labels: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
datasets: [{
data: [15339, 21345, 18483, 24003, 23489, 24092, 12034],
lineTension: 0,
backgroundColor: 'transparent',
borderColor: '#007bff',
borderWidth: 4,
pointBackgroundColor: '#007bff'
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: false
}
}]
},
legend: {
display: false,
}
}
});
</script>
</body>
</html>`
- 修改頁面
<!‐‐需要區分是員工修改還是添加;‐‐>
<form th:action="@{/emp}" method="post">
<!‐‐發送put請求修改員工數據‐‐>
<!‐‐
1、SpringMVC中配置HiddenHttpMethodFilter;(SpringBoot自動配置好的) 2、頁面創建一個post表單
3、創建一個input項,name="_method";值就是我們指定的請求方式
‐‐>
<input type="hidden" name="_method" value="put" th:if="${emp!=null}"/>
<input type="hidden" name="id" th:if="${emp!=null}" th:value="${emp.id}">
<div class="form‐group">
<label>LastName</label>
<input name="lastName" type="text" class="form‐control" placeholder="zhangsan" th:value="${emp!=null}?${emp.lastName}">
</div>
<div class="form‐group">
<label>Email</label>
<input name="email" type="email" class="form‐control"
placeholder="[email protected]" th:value="${emp!=null}?${emp.email}">
</div>
<div class="form‐group">
<label>Gender</label><br/>
<div class="form‐check form‐check‐inline">
<input class="form‐check‐input" type="radio" name="gender" value="1"
th:checked="${emp!=null}?${emp.gender==1}">
<label class="form‐check‐label">男</label>
</div>
<div class="form‐check form‐check‐inline">
<input class="form‐check‐input" type="radio" name="gender" value="0"
th:checked="${emp!=null}?${emp.gender==0}">
<label class="form‐check‐label">女</label>
</div>
</div>
<div class="form‐group">
<label>department</label>
<!‐‐提交的是部門的id‐‐>
<select class="form‐control" name="department.id">
<option th:selected="${emp!=null}?${dept.id == emp.department.id}"
th:value="${dept.id}" th:each="dept:${depts}" th:text="${dept.departmentName}">1</option> </select>
</div>
<div class="form‐group">
<label>Birth</label>
<input name="birth" type="text" class="form‐control" placeholder="zhangsan"
th:value="${emp!=null}?${#dates.format(emp.birth, 'yyyy‐MM‐dd HH:mm')}">
</div>
<button type="submit" class="btn btn‐primary" th:text="${emp!=null}?'修改':'添加'">添加 </button>
</form>
- 刪除頁面
<tr th:each="emp:${emps}">
<td th:text="${emp.id}"></td>
<td>[[${emp.lastName}]]</td>
<td th:text="${emp.email}"></td>
<td th:text="${emp.gender}==0?'女':'男'"></td>
<td th:text="${emp.department.departmentName}"></td>
<td th:text="${#dates.format(emp.birth, 'yyyy‐MM‐dd HH:mm')}"></td>
<td>
<a class="btn btn‐sm btn‐primary" th:href="@{/emp/}+${emp.id}">編輯</a>
<button th:attr="del_uri=@{/emp/}+${emp.id}" class="btn btn‐sm btn‐danger deleteBtn">刪除</button>
</td>
</tr>
<script>
$(".deleteBtn").click(function(){
//刪除當前員工的
$("#deleteEmpForm").attr("action",$(this).attr("del_uri")).submit();
return false;
});
</script>
springbooe2則需要配置:spring.mvc.hiddenmethod.filter.enabled=true