版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_29479041/article/details/82981523
一、简介
使用SpringBoot：
- 1、创建SpringBoot应用，选中我们需要的模块；
- 2、SpringBoot已经默认将这些场景配置好了，只需要在配置文件中指定少量配置就可以运行起来
- 3、自己编写业务代码；
自动配置原理：
- 1、xxxxAutoConfiguration：帮我们给容器中自动配置组件；
- 2、xxxxProperties:配置类来封装配置文件的内容；
二、RestfulCRUD实战
1、默认访问首页
java
//使用WebMvcConfigurerAdapter可以来扩展SpringMVC的功能
//@EnableWebMvc 完全接管SpringMVC
@Configuration
public class MyMvcConfig extends WebMvcConfigurerAdapter {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
//super.addViewControllers(registry);
//浏览器发送 /atguigu请求来到success页面
registry.addViewController("/atguigu").setViewName("success");
}
/**访问首页*/
//所有的WebMvcConfigurerAdapter组件都会一起起作用
@Bean //将组件注册在容器
public WebMvcConfigurerAdapter webMvcConfigurerAdapter(){
WebMvcConfigurerAdapter adapter = new WebMvcConfigurerAdapter() {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("login");
registry.addViewController("/login.html").setViewName("login");
}
};
return adapter;
}
}
pom.xml
<!--引入bootstrap-->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>4.1.3</version>
</dependency>html
<!DOCTYPE html>
<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>Signin Template for Bootstrap</title>
<!-- Bootstrap core CSS -->
<link href="asserts/css/bootstrap.min.css" th:href="@{/webjars/bootstrap/4.1.3/css/bootstrap.css}" rel="stylesheet">
<!-- Custom styles for this template -->
<link href="asserts/css/signin.css" th:href="@{/asserts/css/signin.css}" rel="stylesheet">
</head>
<body class="text-center">
<form class="form-signin" action="dashboard.html">
<img class="mb-4" th:href="@{/asserts/img/bootstrap-solid.svg}" src="asserts/img/bootstrap-solid.svg" alt="" width="72" height="72">
<h1 class="h3 mb-3 font-weight-normal">Please sign in</h1>
<label class="sr-only">Username</label>
<input type="text" class="form-control" placeholder="Username" required="" autofocus="">
<label class="sr-only">Password</label>
<input type="password" class="form-control" placeholder="Password" required="">
<div class="checkbox mb-3">
<label>
<input type="checkbox" value="remember-me"> Remember me
</label>
</div>
<button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
<p class="mt-5 mb-3 text-muted">© 2017-2018</p>
<a class="btn btn-sm">中文</a>
<a class="btn btn-sm">English</a>
</form>
</body>
</html>2、国际化
SpringMVC国际化步骤：
- 1.编写国际化配置文件；
- 2.使用ResourceBundleMessageSource管理国际化资源文件
- 3.在页面使用fmt:message取出国际化内容
SpringBoot国际化步骤：
- 1.编写国际化配置文件，抽取页面需要显示的国际化消息
- 2.在配置文件中设置国际化基础名spring.messages.basename=i18n.login
#设置国际化基础名
spring.messages.basename=i18n.login- 3.SpringBoot自动配置好了管理国际化资源文件的组件
@Configuration
@ConditionalOnMissingBean(
value = {MessageSource.class},
search = SearchStrategy.CURRENT
)
@AutoConfigureOrder(-2147483648)
@Conditional({MessageSourceAutoConfiguration.ResourceBundleCondition.class})
@EnableConfigurationProperties
public class MessageSourceAutoConfiguration {
private static final Resource[] NO_RESOURCES = new Resource[0];
public MessageSourceAutoConfiguration() {
}
@Bean
@ConfigurationProperties(
prefix = "spring.messages"//绑定了spring.messages里面的一些配置
)
public MessageSourceProperties messageSourceProperties() {
return new MessageSourceProperties();
}
// 给容器中添加MessageSource组件，MessageSource管理国际化资源文件的组件
@Bean
public MessageSource messageSource() {
MessageSourceProperties properties = this.messageSourceProperties();
//创建管理国际化资源文件的组件ResourceBundleMessageSource
ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
if (StringUtils.hasText(properties.getBasename())) {
//设置国际化资源文件的基础名（去掉语言国家代码之后的名字）
//我们的配置文件可以直接放在类路径下叫messages.properties，就可以直接使用国际化了；
//在配置文件中设置国际化基础名spring.messages.basename=i18n.login
messageSource.setBasenames(StringUtils.commaDelimitedListToStringArray(StringUtils.trimAllWhitespace(properties.getBasename())));
}
if (properties.getEncoding() != null) {
messageSource.setDefaultEncoding(properties.getEncoding().name());
}
messageSource.setFallbackToSystemLocale(properties.isFallbackToSystemLocale());
Duration cacheDuration = properties.getCacheDuration();
if (cacheDuration != null) {
messageSource.setCacheMillis(cacheDuration.toMillis());
}
messageSource.setAlwaysUseMessageFormat(properties.isAlwaysUseMessageFormat());
messageSource.setUseCodeAsDefaultMessage(properties.isUseCodeAsDefaultMessage());
return messageSource;
}- 4.去页面获取国际化的值
<!DOCTYPE html>
<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>Signin Template for Bootstrap</title>
<!-- Bootstrap core CSS -->
<link href="asserts/css/bootstrap.min.css" th:href="@{/webjars/bootstrap/4.1.3/css/bootstrap.css}" rel="stylesheet">
<!-- Custom styles for this template -->
<link href="asserts/css/signin.css" th:href="@{/asserts/css/signin.css}" rel="stylesheet">
</head>
<body class="text-center">
<form class="form-signin" action="dashboard.html">
<img class="mb-4" th:src="@{/asserts/img/bootstrap-solid.svg}" src="asserts/img/bootstrap-solid.svg" alt="" width="72" height="72">
<h1 class="h3 mb-3 font-weight-normal" th:text="#{login.tip}">Please sign in</h1>
<label class="sr-only" th:text="#{login.username}">Username</label>
<input type="text" class="form-control" placeholder="Username" th:placeholder="#{login.username}" required="" autofocus="">
<label class="sr-only" th:text="#{login.password}">Password</label>
<input type="password" class="form-control" placeholder="Password" th:placeholder="#{login.password}" required="">
<div class="checkbox mb-3">
<label>
<input type="checkbox" value="remember-me"/> [[#{login.remember}]]
</label>
</div>
<button class="btn btn-lg btn-primary btn-block" type="submit" th:text="#{login.btn}">Sign in</button>
<p class="mt-5 mb-3 text-muted">© 2017-2018</p>
<a class="btn btn-sm" th:href="@{/login.html(l='zh_CN')}">中文</a>
<a class="btn btn-sm" th:href="@{/login.html(l='en_US')}">English</a>
</form>
</body>
</html>效果：根据浏览器语言设置的信息切换了国际化；
原理：
国际化Locale（区域信息对象）；LocaleResolver（获取区域信息对象）；
SpringBoot自动配置了区域信息解析器
WebMvcAutoConfiguration.java
//SpringBoot也配置了区域信息解析器
@Bean
@ConditionalOnMissingBean
@ConditionalOnProperty(
prefix = "spring.mvc",
name = {"locale"}
)
public LocaleResolver localeResolver() {
if (this.mvcProperties.getLocaleResolver() == org.springframework.boot.autoconfigure.web.servlet.WebMvcProperties.LocaleResolver.FIXED) {
return new FixedLocaleResolver(this.mvcProperties.getLocale());
} else {
//默认的就是根据请求头带来的区域信息获取Locale进行国际化
AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver();
localeResolver.setDefaultLocale(this.mvcProperties.getLocale());
return localeResolver;
}
}AcceptHeaderLocaleResolver.java
//默认的就是根据请求头带来的区域信息获取Locale进行国际化
public Locale resolveLocale(HttpServletRequest request) {
Locale defaultLocale = this.getDefaultLocale();
if (defaultLocale != null && request.getHeader("Accept-Language") == null) {
return defaultLocale;
} else {
Locale requestLocale = request.getLocale();
List<Locale> supportedLocales = this.getSupportedLocales();
if (!supportedLocales.isEmpty() && !supportedLocales.contains(requestLocale)) {
Locale supportedLocale = this.findSupportedLocale(request, supportedLocales);
if (supportedLocale != null) {
return supportedLocale;
} else {
return defaultLocale != null ? defaultLocale : requestLocale;
}
} else {
return requestLocale;
}
}
}
- 5.点击链接切换国际化
自己写个区域解析器，并把它放到容器中
/**
* 自己写个区域解析器，可以在连接上携带区域信息
*/
public class MyLocalResolver implements LocaleResolver {
@Override
public Locale resolveLocale(HttpServletRequest httpServletRequest) {
String l = httpServletRequest.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 httpServletRequest, HttpServletResponse httpServletResponse, Locale locale) {
}
}
//把自己写的Locale解析器放到容器中
@Bean
public LocaleResolver localeResolver(){
return new MyLocalResolver();
}3、登陆
- controller
@Controller
public class LoginController {
//@RequestMapping(value="/user/login",method = RequestMethod.POST)
//@GetMapping
//@DeleteMapping
//@PutMapping
@PostMapping("/user/login")
public String login(@RequestParam("username") String username,
@RequestParam("password") String password,
Map<String,Object> map){
if(!StringUtils.isEmpty(username)&& "123456".equals(password)){
//登录成功,为了防止表单重复提交，可以重定向到主页
//return "dashboard";
return "redirect:/main.html";
}else{
//登录失败
map.put("msg","用户名密码错误");
return "login";
}
}
}- 增加视图映射
@Bean //将组件注册在容器
public WebMvcConfigurerAdapter webMvcConfigurerAdapter(){
WebMvcConfigurerAdapter adapter = new WebMvcConfigurerAdapter() {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("login");
registry.addViewController("/login.html").setViewName("login");
registry.addViewController("/main.html").setViewName("dashboard");
}
};
return adapter;
}- html
<!DOCTYPE html>
<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>Signin Template for Bootstrap</title>
<link th:href="@{/webjars/bootstrap/4.1.3/css/bootstrap.css}" rel="stylesheet">
<link th:href="@{/asserts/css/signin.css}" rel="stylesheet">
</head>
<body class="text-center">
<form class="form-signin" th:action="@{/user/login}" method="post">
<img class="mb-4" th:src="@{/asserts/img/bootstrap-solid.svg}" width="72" height="72"/>
<h1 class="h3 mb-3 font-weight-normal" th:text="#{login.tip}"></h1>
<!-- 登陆错误消息的显示 判断msg是否为空，不是就展示出来-->
<p style="color: red" th:text="${msg}" th:if="${not #strings.isEmpty(msg)}"></p>
<label class="sr-only" th:text="#{login.username}"></label>
<input type="text" th:name="username" class="form-control" th:placeholder="#{login.username}"/>
<label class="sr-only" th:text="#{login.password}"></label>
<input type="password" name="password" class="form-control" th:placeholder="#{login.password}"/>
<div class="checkbox mb-3">
<label>
<input type="checkbox" value="remember-me"/> [[#{login.remember}]]
</label>
</div>
<button class="btn btn-lg btn-primary btn-block" type="submit" th:text="#{login.btn}"></button>
<p class="mt-5 mb-3 text-muted">© 2017-2018</p>
<!--国际化，切换中英文展示-->
<a class="btn btn-sm" th:href="@{/login.html(l='zh_CN')}">中文</a>
<a class="btn btn-sm" th:href="@{/login.html(l='en_US')}">English</a>
</form>
</body>
</html>注意：
开发期间模板引擎页面修改以后，要实时生效
1.禁用模板引擎的缓存
# 禁用缓存
spring.thymeleaf.cache=false 2.页面修改完成以后command+f9：重新编译；
登陆错误消息的显示：在html加上这段代码
<p style="color: red" th:text="${msg}" th:if="${not #strings.isEmpty(msg)}"></p>4、拦截器进行登陆检查
拦截器
/**
* 登陆检查，
*/
public class LoginHandlerInterceptor implements HandlerInterceptor {
//目标方法执行之前
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
Object user = request.getSession().getAttribute("loginUser");
if(user == null){
//未登陆，返回登陆页面
request.setAttribute("msg","没有权限请先登陆");
request.getRequestDispatcher("/index.html").forward(request,response);
return false;
}else{
//已登陆，放行请求
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 {
}
}
注册拦截器
//所有的WebMvcConfigurerAdapter组件都会一起起作用
@Bean //将组件注册在容器
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");
}
//注册拦截器
@Override
public void addInterceptors(InterceptorRegistry registry) {
//super.addInterceptors(registry);
//静态资源； *.css , *.js
//SpringBoot已经做好了静态资源映射
registry.addInterceptor(new LoginHandlerInterceptor()).addPathPatterns("/**")
.excludePathPatterns("/index.html","/","/user/login");
}
};
return adapter;
}5、CRUD-员工列表
实验要求：
- 1.RestfulCRUD：CRUD满足Rest风格；
URI： /资源名称/资源标识 HTTP请求方式区分对资源CRUD操作
| 普通CRUD（uri来区分操作） | RestfulCRUD | |
|---|---|---|
| 查询 | getEmp | emp---GET |
| 添加 | addEmp?xxx | emp---POST |
| 修改 | updateEmp?id=xxx&xxx=xx | emp/{id}---PUT |
| 删除 | deleteEmp?id=1 | emp/{id}---DELETE |
- 2.实验的请求架构;
| 实验功能 | 请求URI | 请求方式 |
|---|---|---|
| 查询所有员工 | emps | GET |
| 查询某个员工(来到修改页面) | emp/1 | GET |
| 来到添加页面 | emp | GET |
| 添加员工 | emp | POST |
| 来到修改页面（查出员工进行信息回显） | emp/1 | GET |
| 修改员工 | emp | PUT |
| 删除员工 | emp/1 | DELETE |
- 3.员工列表：
thymeleaf公共页面元素抽取
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::选择器
~{templatename::fragmentname}:模板名::片段名
3、默认效果：
insert的公共片段在div标签中
如果使用th:insert等属性进行引入，可以不用写~{}：
行内写法可以加上：[[~{}]];[(~{})]；三种引入公共片段的th属性：
- th:insert：将公共片段整个插入到声明引入的元素中
- th:replace：将声明引入的元素替换为公共片段
- th:include：将被引入的片段的内容包含进这个标签中
<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>引入片段的时候传入参数：
<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>
<!--引入侧边栏;传入参数-->
<div th:replace="commons/bar::#sidebar(activeUri='emps')"></div>controller
//查询所有员工返回列表页面
@GetMapping("/emps")
public String list(Model model){
Collection<Employee> employees = employeeDao.getAll();
//将要传输的数据放在请求域中
model.addAttribute("emps",employees);
//thymeleaf默认会加上前缀和后缀拼串
//classpath:/templates/xxx.html
return "emp/list";
}员工列表页面
<!DOCTYPE html>
<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>
<link th:href="@{/webjars/bootstrap/4.1.3/css/bootstrap.css}" rel="stylesheet">
<link th:href="@{/asserts/css/dashboard.css}" rel="stylesheet">
<style type="text/css">
@-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-->
<!--模版名：会使用thymeleaf的前后缀配置规则进行解析-->
<div th:replace="commons/bar::topbar"></div>
<div class="container-fluid">
<div class="row">
<!-- 引入侧边栏 -->
<div th:replace="~{commons/bar::#sidebar(activeUri='emps')}"></div>
<main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4">
<h2><a class="btn btn-sm btn-success" href="emp" th:href="@{/emp}">员工添加</a></h2>
<h2>Section title</h2>
<div class="table-responsive">
<table class="table table-striped table-sm">
<thead>
<tr>
<th>#id</th>
<th>lastName</th>
<th>email</th>
<th>gender</th>
<th>department</th>
<th>birth</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr th:each="emp:${emps}">
<td th:text="${emp.id}"></td>
<td th:text="${emp.lastName}"></td>
<td>[[${emp.email}]]</td>
<td th:text="${emp.gender}==0?'女':'男'"></td>
<td th:text="${emp.department.departmentName}"></td>
<td th:text="${#dates.format(emp.birth,'yyyy-mm-dd')}"></td>
<td>
<a class="btn btn-sm btn-primary" th:href="@{/emp/}+${emp.id}">修改</a>
<button th:attr="del_uri=@{/emp/}+${emp.id}" class="btn btn-sm btn-danger deleteBtn">删除</button>
</td>
</tr>
</tbody>
</table>
</div>
</main>
<form id="deleteEmpForm" method="post">
<input type="hidden" name="_method" value="delete"/>
</form>
</div>
</div>
<script type="text/javascript" src="asserts/js/jquery-3.2.1.slim.min.js"></script>
<script type="text/javascript" src="asserts/js/popper.min.js"></script>
<script type="text/javascript" src="asserts/js/bootstrap.min.js"></script>
<script type="text/javascript" src="asserts/js/feather.min.js"></script>
<script>
feather.replace()
</script>
<script type="text/javascript" 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>
<script>
$(".deleteBtn").click(function(){
//删除当前员工的
$("#deleteEmpForm").attr("action",$(this).attr("del_uri")).submit();
return false;
});
</script>
</body>
</html>6、CRUD-员工添加
controller
//员工添加
//SpringMVC自动将请求参数和入参对象的属性进行一一绑定；要求请求参数的名字和Java Bean入参的对象里面的属性名一样
@PostMapping("/emp")
public String addEmp(Employee employee){
System.out.println(employee);
//保存员工
employeeDao.save(employee);
//forward:表示转发到一个地址
//redirect:表示重定向到一个地址 /代表当前项目路径
return "redirect:/emps";
}forward和redirect原理
ThymeleafViewResolver.java
protected View createView(String viewName, Locale locale) throws Exception {
if (!this.alwaysProcessRedirectAndForward && !this.canHandle(viewName, locale)) {
vrlogger.trace("[THYMELEAF] View \"{}\" cannot be handled by ThymeleafViewResolver. Passing on to the next resolver in the chain.", viewName);
return null;
} else {
String forwardUrl;
if (viewName.startsWith("redirect:")) {
vrlogger.trace("[THYMELEAF] View \"{}\" is a redirect, and will not be handled directly by ThymeleafViewResolver.", viewName);
forwardUrl = viewName.substring("redirect:".length(), viewName.length());
//创建重定向视图
RedirectView view = new RedirectView(forwardUrl, this.isRedirectContextRelative(), this.isRedirectHttp10Compatible());
return (View)this.getApplicationContext().getAutowireCapableBeanFactory().initializeBean(view, viewName);
} else if (viewName.startsWith("forward:")) {
vrlogger.trace("[THYMELEAF] View \"{}\" is a forward, and will not be handled directly by ThymeleafViewResolver.", viewName);
//
forwardUrl = viewName.substring("forward:".length(), viewName.length());
return new InternalResourceView(forwardUrl);
} else if (this.alwaysProcessRedirectAndForward && !this.canHandle(viewName, locale)) {
vrlogger.trace("[THYMELEAF] View \"{}\" cannot be handled by ThymeleafViewResolver. Passing on to the next resolver in the chain.", viewName);
return null;
} else {
vrlogger.trace("[THYMELEAF] View {} will be handled by ThymeleafViewResolver and a {} instance will be created for it", viewName, this.getViewClass().getSimpleName());
return this.loadView(viewName, locale);
}
}
}日期的格式化；SpringMVC将页面提交的值需要转换为指定的类型;
默认日期是按照/的方式；
#指定日期格式
spring.mvc.date-format=yyyy-mm-dd 7、CRUD-员工修改
controller
//来到修改页面，查出当前员工，在页面回显
@GetMapping("/emp/{id}")
public String toEditPage(@PathVariable("id") Integer id,Model model){
Employee employee = employeeDao.get(id);
Collection<Department> departements = departmentDao.getDepartments();
model.addAttribute("depts",departements);
model.addAttribute("emp",employee);
//回到修改页面（add是一个修改添加二合一的页面）
return "emp/add";
}
//员工修改
@PutMapping("/emp")
public String updateEmp(Employee employee){
System.out.println(employee);
//保存员工
employeeDao.save(employee);
return "redirect:/emps";
}修改添加二合一表单
<!DOCTYPE html>
<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>
<link th:href="@{/webjars/bootstrap/4.1.3/css/bootstrap.css}" rel="stylesheet">
<link th:href="@{/asserts/css/dashboard.css}" rel="stylesheet">
<style type="text/css">
@-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：会使用thymeleaf的前后缀配置规则进行解析-->
<div th:replace="commons/bar::topbar"></div>
<div class="container-fluid">
<div class="row">
<!--引入侧边栏-->
<div th:replace="commons/bar::#sidebar(activeUri='emps')"></div>
<main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4">
<!--需要区分是员工修改还是添加；-->
<form th:action="@{/emp}" method="post">
<!--发送put请求修改员工数据-->
<!--
1、SpringMVC中配置HiddenHttpMethodFilter;（SpringBoot自动配置好的）
2、页面创建一个post表单
3、创建一个input项，name="_method";值就是我们指定的请求方式
-->
<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}?${emp.gender==0}">
<label class="form-check-label">女</label>
</div>
</div>
<div class="form-group">
<label>department</label>
<!--提交的是部门的id-->
<select class="form-control" name="department.id">
<option th:selected="${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="${emp!=null}?'修改':'添加'">添加</button>
</form>
</main>
</div>
</div>
<script type="text/javascript" src="asserts/js/jquery-3.2.1.slim.min.js" th:src="@{/webjars/jquery/3.3.1/jquery.js}"></script>
<script type="text/javascript" src="asserts/js/popper.min.js" th:src="@{/webjars/popper.js/1.11.1/dist/popper.js}"></script>
<script type="text/javascript" src="asserts/js/bootstrap.min.js" th:src="@{/webjars/bootstrap/4.0.0/js/bootstrap.js}"></script>
<script type="text/javascript" src="asserts/js/feather.min.js" th:src="@{/asserts/js/feather.min.js}"></script>
<script>
feather.replace()
</script>
</body>
</html>8、CRUD-员工删除
controller
//员工删除
@DeleteMapping("/emp/{id}")
public String deleteEmployee(@PathVariable("id") Integer id){
employeeDao.delete(id);
return "redirect:/emps";
}html
<tr th:each="emp:${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/}+${emp.id}">编辑</a>
<button th:attr="del_uri=@{/emp/}+${emp.id}" class="btn btn-sm btn-danger deleteBtn">删除</button>
</td>
</tr>
<script>
$(".deleteBtn").click(function(){
//删除当前员工的
$("#deleteEmpForm").attr("action",$(this).attr("del_uri")).submit();
return false;
});
</script>