前言：
今天兄弟们对“格式化转换器”都比较关怀，同学们都需要剖析一些“格式化转换器”的相关知识。那么小编也在网上收集了一些有关“格式化转换器””的相关知识，希望朋友们能喜欢，我们快快来学习一下吧！1、SpringMVC的自动导入
Spring框架
自动配置好了mvc：
以下是SpringBoot对SpringMVC的默认
Spring Boot provides auto-configuration for Spring MVC that works well with most applications.
The auto-configuration adds the following features on top of Spring’s defaults:
Inclusion of ContentNegotiatingViewResolver and BeanNameViewResolver beans.自动配置了ViewResolver(视图解析器：根据方法的返回值得到视图对象（View）,视图对象决定如何渲染（转发？重定向？）)ContentNegotiatingViewResolver组合所有视图解析器如何定制：我们可以自己给容器中添加一个视图解析器；自动将其整合进来Support for serving static resources, including support for WebJars (see below).静态资源Static index.html support.Custom Favicon support (see below).自动注册 了Converter, GenericConverter, Formatter beans.Converter：类型转换 文本转为字面量Formatter ：格式化器 转换后格式转换@Bean @ConditionalOnProperty(prefix = "spring.mvc", name = "date-format")//在文件配置入职格式化的规则 public Formatter<Date> dateFormatter() { return new DateFormatter(this.mvcProperties.getDateFormat());//日期格式化组件 }自己添加的格式化转换器，只需要放在容器中即可Support for HttpMessageConverters (see below).HttpMessageConverters ：转换HTTP转换和响应：User - jsonHttpMessageConverters ：是从容器中确定；获取所有的HttpMessageConverters ，将自己的组件注册在容器中@BeanIf you need to add or customize converters you can use Spring Boot’s HttpMessageConverters class:import org.springframework.boot.autoconfigure.web.HttpMessageConverters; import org.springframework.context.annotation.*; import org.springframework.http.converter.*; @Configuration public class MyConfiguration { @Bean public HttpMessageConverters customConverters() { HttpMessageConverter<?> additional = ... HttpMessageConverter<?> another = ... return new HttpMessageConverters(additional, another); } }Automatic registration of MessageCodesResolver (see below).定义错误代码生成规则Automatic use of a ConfigurableWebBindingInitializer bean (see below).@Override protected ConfigurableWebBindingInitializer getConfigurableWebBindingInitializer() { try { return this.beanFactory.getBean(ConfigurableWebBindingInitializer.class); } catch (NoSuchBeanDefinitionException ex) { return super.getConfigurableWebBindingInitializer(); } }在beanFactory：中可以自己创建一个，初始化webDataBinder请求数据 ==》javaBean
If you want to keep Spring Boot MVC features, and you just want to add additional MVC configuration (interceptors, formatters, view controllers etc.) you can add your own @Configuration class of type WebMvcConfigurerAdapter, but without @EnableWebMvc. If you wish to provide custom instances of RequestMappingHandlerMapping, RequestMappingHandlerAdapter or ExceptionHandlerExceptionResolver you can declare a WebMvcRegistrationsAdapter instance providing such components.
If you want to take complete control of Spring MVC, you can add your own @Configuration annotated with @EnableWebMvc.
思想：修改默认配置
2、扩展SpringMVC
编写一个配置类，类型是WebMvcConfigurerAdapter(继承)，使用WebMvcConfigurerAdapter可以扩展，不能标注@EnableWebMvc;既保留了配置，也能拓展我们自己的应用
@Configurationpublic class MyMvcConfig extends WebMvcConfigurerAdapter { @Override public void addViewControllers(ViewControllerRegistry registry) {// super.addViewControllers(registry); //浏览器发送wdjr请求，也来到success页面 registry.addViewController("/wdjr").setViewName("success"); }}原理：
1）、WebMvcAutoConfiguration是SpringMVC的自动配置
2）、在做其他自动配置时会导入；@Import(EnableWebMvcConfiguration.class)
@Configurationpublic static class EnableWebMvcConfiguration extends DelegatingWebMvcConfiguration { private final WebMvcConfigurerComposite configurers = new WebMvcConfigurerComposite(); //从容器中获取所有webMVCconfigurer @Autowired(required = false) public void setConfigurers(List<WebMvcConfigurer> configurers) { if (!CollectionUtils.isEmpty(configurers)) { this.configurers.addWebMvcConfigurers(configurers); @Override protected void addViewControllers(ViewControllerRegistry registry) { this.configurers.addViewControllers(registry); } //一个参考实现,将所有的webMVCconfigurer相关配置一起调用（包括自己的配置类） @Override // public void addViewControllers(ViewControllerRegistry registry) { // for (WebMvcConfigurer delegate : this.delegates) { //delegate.addViewControllers(registry); //} } } } 3）、自己的配置被调用
效果：SpringMVC的自动配置和我们的扩展配置都会起作用
3、全面接管mvc
不需要SpringBoot对SpringMVC的自动配置。
@EnableWebMvc@Configurationpublic class MyMvcConfig extends WebMvcConfigurerAdapter {@Overridepublic void addViewControllers(ViewControllerRegistry registry) {// super.addViewControllers(registry); //浏览器发送wdjr请求，也来到success页面 registry.addViewController("/wdjr").setViewName("success"); }}例如静态资源访问，不推荐全面接管
原理：
为什么@EnableWebMvc注解，SpringBoot对SpringMVC的控制就失效了
1）、核心配置
@Import(DelegatingWebMvcConfiguration.class)public @interface EnableWebMvc {}2）、DelegatingWebMvcConfiguration
@Configurationpublic class DelegatingWebMvcConfiguration extends WebMvcConfigurationSupport {3）、WebMvcAutoConfiguration
@Configuration@ConditionalOnWebApplication@ConditionalOnClass({ Servlet.class, DispatcherServlet.class, WebMvcConfigurerAdapter.class })//容器没有这个组件的时候，这个自动配置类才生效@ConditionalOnMissingBean(WebMvcConfigurationSupport.class)@AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE + 10)@AutoConfigureAfter({ DispatcherServletAutoConfiguration.class, ValidationAutoConfiguration.class })public class WebMvcAutoConfiguration {4）、@EnableWebMvc将WebMvcConfigurationSupport导入进来了；
5）、导入的WebMvcConfigurationSupport只是SpringMVC最基本的功能
5、修改SpringMVC默认配置
模式:
1）、SpringBoot在自动配置很多组件的时候，先看容器中有没有用户自己配置的（@Bean、@Component）如果有就用用户配置的，如果没有，才自动配置；如果有些组件可以有多个（ViewResolver）将用户配置的和自己默认的组合起来；
2）、在SpringBoot中会有 xxxConfigurer帮助我们扩展配置。
6、RestfulCRUD1、默认访问首页
在config/MyConfig.java中编写配置类
//所有的webMvcConfigurerAdapter组件会一起起作用@Bean //註冊到容器去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;}静态资源引用
<link href="#" th:href="@{/css/signin.css}" rel="stylesheet" />2、国际化1、编写国际化配置文件
2、使用ResourceBundleMessageSource管理国际化资源文件
3、在页面中使用fmt:message，取出国际化内容
1、浏览器切换国际化
步骤
1、编写国际化配置文件，抽取页面需要的显示的国际化消息
2、SpringBoot自动配置好了国际化配置的资源文件
@ConfigurationProperties(prefix = "spring.messages")public class MessageSourceAutoConfiguration { //我们的配置文件可以直接放在类路径下叫messages.properties private String basename = "messages"; @Bean public MessageSource messageSource() { ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource(); if (StringUtils.hasText(this.basename)) { //设置国际化文件的基础名，去掉语言国家代码 messageSource.setBasenames(StringUtils.commaDelimitedListToStringArray( StringUtils.trimAllWhitespace(this.basename))); } if (this.encoding != null) { messageSource.setDefaultEncoding(this.encoding.name()); } messageSource.setFallbackToSystemLocale(this.fallbackToSystemLocale); messageSource.setCacheSeconds(this.cacheSeconds); messageSource.setAlwaysUseMessageFormat(this.alwaysUseMessageFormat); return messageSource; }3、对IDEA的编码进行设置
4、login进行标签插入
<!DOCTYPE html><!-- saved from url=(0051) --><html lang="en" xmlns:th=";><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="" /> <link rel="icon" href="; /> <title>登录页面</title> <!-- Bootstrap core CSS --> <link href="#" th:href="@{/css/bootstrap.min.css}" rel="stylesheet" /> <!-- Custom styles for this template --> <link href="./login_files/signin.css" th:href="@{/css/signin.css}" rel="stylesheet" /> </head> <body class="text-center"> <form class="form-signin"> <img class="mb-4" src="./login_files/bootstrap-solid.svg" th:src="@{/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" name="username" class="form-control" placeholder="Username" th:placeholder="#{login.username}" required="" autofocus=""/> <label for="inputPassword" class="sr-only" th:text="#{login.password}">Password</label> <input type="password" name="password" id="inputPassword" 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> </form> </body></html>效果根据浏览器语言的信息切换国际化
原理：
国际化locale（区域信息对象）；LocaleResolver(获取区域对象)；
@Bean@ConditionalOnMissingBean@ConditionalOnProperty(prefix = "spring.mvc", name = "locale")public LocaleResolver localeResolver() { if (this.mvcProperties .getLocaleResolver() == WebMvcProperties.LocaleResolver.FIXED) { return new FixedLocaleResolver(this.mvcProperties.getLocale()); } AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver(); localeResolver.setDefaultLocale(this.mvcProperties.getLocale()); return localeResolver;} 默认的就是根据请求头带来的区域信息获取local国际化信息（截图就是这么犀利）
2、点击链接切换国际化
自己编写localResolver，加到容器中
1、更改HTML代码
<p class="mt-5 mb-3 text-muted">© 2017-2018</p> <a href="#" class="btn btn-sm" th:href="@{/index.html?lg=zh_CN}">中文</a> <a href="#" class="btn btn-sm" th:href="@{/index.html?lg=en_US}">English</a>2、新建一个MyLocaleResolver.class
public class MyLocaleResolver implements LocaleResolver { //解析区域信息 @Override public Locale resolveLocale(HttpServletRequest request) { String l = request.getParameter("lg"); 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) { }}3、将MyLocaleResolver加入到容器中
@Beanpublic LocaleResolver localeResolver(){ return new MyLocalResolver();}4、启动演示
3、登录拦截器1、登录
开发技巧
1、清除模板缓存
2、Ctrl+F9刷新
1、新建一个LoginController
@Controllerpublic class LoginController { @PostMapping(value ="/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 return "list"; }else{ map.put("msg", "用户名密码错误"); return "login"; } }}2、登录错误消息显示
<!--判断--><p style="color: red" th:text="${msg}" th:if="${not #strings.isEmpty(msg)}"></p>3、表单重复提交
表单重复提交事件 --》重定向来到成功页面--》模板引擎解析
if(!StringUtils.isEmpty(username) && "123456".equals(password)){ //登录成功,防止重复提交 return "redirect:/main.html";}else{ map.put("msg", "用户名密码错误"); return "login";}模板引擎解析
@Overridepublic void addViewControllers(ViewControllerRegistry registry) { registry.addViewController("/").setViewName("login"); registry.addViewController("/index.html").setViewName("login"); registry.addViewController("/main.html").setViewName("Dashboard");}4、拦截器作用：实现权限控制，每个页面请求前中后，都会进入到拦截器进行处理（登录权限）
1、在component下新建一个LoginHandlerInterceptor拦截器
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){ //已经登录 return true; } //未经过验证 request.setAttribute("msg", "没权限请先登录"); request.getRequestDispatcher("/index.html").forward(request, response); return false; } @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 { }}2、在MyMvcConfig配置中重写拦截器方法，加入到容器中
//所有的webMvcConfigurerAdapter组件会一起起作用@Bean //註冊到容器去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) { //静态资源 css js img 已经做好了静态资源映射 registry.addInterceptor(new LoginHandlerInterceptor()).addPathPatterns("/**"). excludePathPatterns("/index.html","/","/user/login"); } }; return adapter;}3、在LoginHandler中添加登录成功写入session
@Controllerpublic class LoginController { @PostMapping(value ="/user/login") public String login(@RequestParam("username")String username, @RequestParam("password")String password, Map<String,Object> map, HttpSession session){ if(!StringUtils.isEmpty(username) && "123456".equals(password)){ //登录成功,防止重复提交 session.setAttribute("loginUser", username); return "redirect:/main.html"; }else{ map.put("msg", "用户名密码错误"); return "login"; } }}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操作
普通CRUD
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
请求URI
请求方式
查询所有员工
emps
GET
查询某个员工
emp/{id}
GET
添加页面
emp
GET
添加员工
emp
POST
修改页面(回显)
emp/{id}
GET
修改员工
emp/{id}
PUT
删除员工
emp/{id}
DELETE
3、员工列表
1、公共页面抽取
使用方法
1、抽取公共片段<!--footer.html--><div id="footid" th:fragment="copy">xxx</div>2、引入公共片段<!--test.html--><div th:insert=~{footer::copy}></div>~{templatename::selector} 模板名::选择器 footer::#footid~{templatename::fragmentname} 模板名::片段名称 footer::copy行内写法可以加~{xx::xx} 标签体可以 xx::xx三种引用方式
th:insert :加个外层标签 +1
th:replace :完全替换 1
th:include：就替换里面的内容 -1
公共页面
<body> ... <div th:insert="footer :: copy"></div> <div th:replace="footer :: copy"></div> <div th:include="footer :: copy"></div></body>
结果
<body>... <!-- th:insert --> <div> <footer> © 2011 The Good Thymes Virtual Grocery </footer> </div> <!--th:replace--> <footer> © 2011 The Good Thymes Virtual Grocery </footer> <!--th:include--> <div> © 2011 The Good Thymes Virtual Grocery </div></body>
用此种方法将公共页面引入
2、列表高亮
引入片段的时候传入参数，新建一个commons文件夹存储公共页面bar.html
模板引入变量名
dashboard
<a class="nav-link active" th:class="${activeUri}=='main.html'?'nav-link active':'nav-link'" href="; th:href="@{/main.html}"> <svg xmlns="; width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-home"><path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z"></path><polyline points="9 22 9 12 15 12 15 22"></polyline></svg> Dashboard <span class="sr-only">(current)</span></a>员工管理
<li class="nav-item"> <a class="nav-link" th:class="${activeUri}=='emps'?'nav-link active':'nav-link'" href="; th:href="@{/emps}"> <svg xmlns="; 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-users"><path d="M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2"></path><circle cx="9" cy="7" r="4"></circle><path d="M23 21v-2a4 4 0 0 0-3-3.87"></path><path d="M16 3.13a4 4 0 0 1 0 7.75"></path></svg> 员工管理 </a>引入模板的时候传入参数
dashboard.html引入
<!--引入侧边栏--> <div th:replace="commons/bar :: sidebar(activeUri='main.html')"></div>
list.html引入
<!--引入侧边栏--><div th:replace="commons/bar::sidebar(activeUri='emps')"></div>6、列表数据显示（查）1、传入员工对象
EmployeeController类,传入员工对象
@Controllerpublic class EmployeeController { @Autowired EmployeeDao employeeDao; /** * 查询所有员工返回列表页面 */ @GetMapping(value = "/emps") public String list(Model model){ Collection<Employee> employees = employeeDao.getAll(); model.addAttribute("emps",employees); return "emp/list"; }}2、 遍历对象list.html中 使用模板的 th:each方法
table class="table table-striped table-sm"> <thead> <tr> <th>#</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}">1</td> <td th:text="${emp.lastName}">1</td> <td th:text="${emp.email}">1</td> <td th:text="${emp.gender}">1</td> <td th:text="${emp.department.departmentName}">1</td> <td th:text="${#dates.format(emp.birth,'yyyy-MM-dd HH:mm:ss')}">1</td> <td> <button class="btn btn-sm btn-primary">编辑</button> <button class="btn btn-sm btn-danger">删除</button> </td> </tr> </tbody></table>3、效果显示7、员工添加（增）功能：点击添加按钮，出现新增页面
1、新增页面
<form> <!-- LastName --> <div class="form-group"> <label for="LastName">LastName</label> <input type="text" class="form-control" id="LastName" placeholder="LastName"> </div> <!-- Email --> <div class="form-group"> <label for="Email">Email</label> <input type="email" class="form-control" id="Email" placeholder="zhangsan@163.com"> </div> <!--gender--> <div class="form-group"> <label >Gender</label><br/> <div class="form-check form-check-inline"> <input class="form-check-input" type="radio" name="gender" value="1"> <label class="form-check-label" >男</label> </div> <div class="form-check form-check-inline"> <input class="form-check-input" type="radio" name="gender" value="0"> <label class="form-check-label" >女</label> </div> </div> <!-- department --> <div class="form-group"> <label for="exampleFormControlSelect1">department</label> <select class="form-control" id="exampleFormControlSelect1"> <option th:each="dept:${depts}" th:value="${dept.id}" th:text="${dept.departmentName}"></option> </select> </div> <!--Birth--> <div class="form-group"> <label for="birthDate">Birth</label> <input type="text" class="form-control" id="birthDate" placeholder="2012-12-12"> </div> <button type="submit" class="btn btn-primary">添 加</button></form>2、页面跳转在EmployeeController中添加addEmpPage方法
/** * 添加员工 */@GetMapping(value = "/emp")public String toAddPage(Model model){ //来到添加页面,查出所有部门显示 Collection<Department> depts = departmentDao.getDepartments(); model.addAttribute("depts",depts); return "emp/add";}关键点：在添加部门页面要遍历部门信息，所以在方法中出入部门信息
3、添加功能完成
新建一个PostMapping
ThymeleafViewResolver 查看redirect和forward,原生的sendredirect方法；
1、新建一个postMapping的方法用来接受页面的添加POST请求
/** * 员工添加 */@PostMapping(value = "/emp")public String addEmp(Employee employee){ employeeDao.save(employee); //来到员工列表页面、redirect:重定向到一个地址，forward转发到一个地址 return "redirect:/emps";}2、修改添加页面，添加name属性
<form th:action="@{/emp}" method="post"> <!-- LastName --> <div class="form-group"> <label for="LastName">LastName</label> <input type="text" class="form-control" id="LastName" name="lastName" placeholder="LastName"> </div> <!-- Email --> <div class="form-group"> <label for="Email">Email</label> <input type="email" class="form-control" id="Email" name="email" placeholder="zhangsan@163.com"> </div> <!--gender--> <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"> <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"> <label class="form-check-label" >女</label> </div> </div> <!-- department --> <div class="form-group"> <label >department</label> <select class="form-control" name="department.id"> <option th:each="dept:${depts}" th:value="${dept.id}" th:text="${dept.departmentName}"></option> </select> </div> <div class="form-group"> <label for="birthDate">Birth</label> <input type="text" class="form-control" id="birthDate" placeholder="2012-12-12" name="birth"> </div> <button type="submit" class="btn btn-primary">添 加</button></form>1、部门对象问题？
<select class="form-control" name="department.id">
2、日期格式化？
属性中添加 date-formate 默认是 /
@Bean@ConditionalOnProperty(prefix = "spring.mvc", name = "date-format")public Formatter<Date> dateFormatter() { return new DateFormatter(this.mvcProperties.getDateFormat());}@Overridepublic MessageCodesResolver getMessageCodesResolver() { if (this.mvcProperties.getMessageCodesResolverFormat() != null) { DefaultMessageCodesResolver resolver = new DefaultMessageCodesResolver(); resolver.setMessageCodeFormatter( this.mvcProperties.getMessageCodesResolverFormat()); return resolver; } return null;}spring.mvc.date-format=yyyy-MM-dd8、员工编辑（改）
思路使用add页面，并且数据回显，然后区分添加，PUT请求
1、修改按钮
在list.html的编辑按钮加上链接
<td> <a href="#" th:href="@{/emp/}+${emp.id}" class="btn btn-sm btn-primary">编辑</a> <button class="btn btn-sm btn-danger">删除</button></td>2、编写跳转页面跳转到员工编辑页面的Controller
/** * 员工编辑页面 */@GetMapping(value = "/emp/{id}")public String toEditPage(@PathVariable("id") Integer id ,Model model){ Employee emp = employeeDao.getEmpById(id); Collection<Department> departments = departmentDao.getDepartments(); model.addAttribute("emp",emp); model.addAttribute("depts",departments); return "emp/add";} 3、对页面修改对add页面进行修改
1）、添加回显
2）、添加判断是否emp!=null（区分add or edit）
3）、添加put请求 --两个input的hidden标签
<form th:action="@{/emp}" method="post"> <!--发送put请求--> <!--1.SpringMVC配置HiddenHttpMethodFilter 2.页面创建一个post表单 3.创建一个 input name_method 值就是我们请求的方式--> <input type="hidden" name="_method" value="put" th:if="${emp!=null}"> <input type="hidden" name="id" th:value="${emp.id}" th:if="${emp!=null}"> <!-- LastName --> <div class="form-group"> <label for="LastName">LastName</label> <input type="text" class="form-control" id="LastName" name="lastName" placeholder="LastName" th:value="${emp!=null}?${emp.lastName}"> </div> <!-- Email --> <div class="form-group"> <label for="Email">Email</label> <input type="email" class="form-control" id="Email" name="email" placeholder="zhangsan@163.com" th:value="${emp!=null}?${emp.email}"> </div> <!--gender--> <div class="form-group"> <label >Gender</label><br/> <div class="form-check form-check-inline"> <input class="form-check-input" type="radio" name="gender" value="1" th:checked="${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}?${emp.gender}==0"> <label class="form-check-label" >女</label> </div> </div> <!-- department --> <div class="form-group"> <label >department</label> <select class="form-control" name="department.id" > <option th:selected="${emp!=null}?${dept.id == emp.department.id}" th:each="dept:${depts}" th:value="${dept.id}" th:text="${dept.departmentName}"></option> </select> </div> <div class="form-group"> <label for="birthDate">Birth</label> <input type="text" class="form-control" id="birthDate" placeholder="2012-12-12" name="birth" th:value="${emp!=null}?${#dates.format(emp.birth,'yyyy-MM-dd HH:mm:ss')}"> </div> <button type="submit" class="btn btn-primary" th:text="${emp!=null}?'修改':'添加'">添 加</button> </form></main>9、员工删除（删）1、新建Contoller/** * 员工删除 */@DeleteMapping(value = "/emp/{id}")public String deleteEmp(@PathVariable("id") Integer id){ employeeDao.deleteEmpById(id); return "redirect:/emps";}2、修改删除标签<button th:attr="del_uri=@{/emp/}+${emp.id}" class="btn btn-sm btn-danger deleteBtn"> 删除</button>3、写Form表单form表单卸载外面，input 中 name="_method" value="delete" 模拟delete请求
</tbody> </table> </div> </main> <form id="deleteEmpForm" method="post"> <input type="hidden" name="_method" value="delete"> </form></div>4、写JS提交
<script> $(".deleteBtn").click(function () { $("#deleteEmpForm").attr("action",$(this).attr("del_uri")).submit(); return false; })</script>return false;禁用btn提交效果
标签： #格式化转换器
