Spring boot CRUD

<li class="nav-item">
    <a class="nav-link" href="#"  th:href="@{/emps}" th:class="${activeUrl == ‘emps‘ ? ‘nav-link active‘ : ‘nav-link‘}">
        <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-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>
</li>

@GetMapping("/emp")
public String addEmpPage(Model model) {
    return "emp/add";
}

<div th:replace="commons/bar :: topBar"></div>
        <div class="container-fluid">
            <div class="row">
                <div th:replace="commons/bar :: sideBar(activeUrl=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>
                        <div class="table-responsive">
                        <table class="table table-striped table-sm">
                            <thead>
                                <tr>
                                    <th>id</th>
                                    <th>姓氏</th>
                                    <th>邮箱</th>
                                    
                                    <th>性别</th>
                                    <th>部门</th>
                                    <th>生日</th>
                                    
                                    <th>操作</th>
                                </tr>
                            </thead>
                            <tbody>
                                <tr th:each="emp : ${emps}">
                                
                                    <td th:text="${emp.id}"></td>
                                    <td th:text="${emp.lastName}">Lorem</td>
                                    <td  th:text="${emp.email}">ipsum</td>
                                    
                                    <td th:text="${emp.gender}">dolor</td>
                                    <td th:text="${emp.department.departmentName}">sit</td>
                                    <td th:text="${emp.birth}">sit</td>
                                    
                                    <td>
                                        <button class="btn btn-sm btn-primary" type="submit">编辑</button>
                                        <button class="btn btn-sm btn-danger" type="submit">删除</button>
                                    </td>
                                </tr>
                            </tbody>
                        </table>
                </main>
            </div>
        </div>

<!--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}?${emp.lastName}">
                </div>
                <div class="form-group">
                    <label>Email</label>
                    <input name="email" type="email" class="form-control" placeholder="zhangsan@atguigu.com" th:value="${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>

public class WebMvcAutoConfiguration {
    @Configuration
    public static class EnableWebMvcConfiguration extends DelegatingWebMvcConfiguration {
        private final WebMvcProperties mvcProperties;

　　　　　//Spring 2.1.0的配置
        @Bean
        @Override
        public FormattingConversionService mvcConversionService() {
            WebConversionService conversionService = new WebConversionService(
                    this.mvcProperties.getDateFormat());
            addFormatters(conversionService);
            return conversionService;
        }
　　　　　　
　　　　　　//下面的是springBoot1.5版本的代码，给明了配置项名称

　　　　　　@Bean
　　　　　　@ConditionalOnProperty(prefix = "spring.mvc",name="date-format")
　　　　　　public Formatter<Date> dateFormatter() {return new DateFormatter(this.mvcProperties.getDateFormater())}

    }
}



@ConfigurationProperties(prefix = "spring.mvc")
public class WebMvcProperties {
    /**
     * Date format to use. For instance, `dd/MM/yyyy`.
     */
    private String dateFormat;
    
    public String getDateFormat() {
        return this.dateFormat;
    }

    public void setDateFormat(String dateFormat) {
        this.dateFormat = dateFormat;
    }
}

spring.mvc.date-format = yyyy-MM-dd HH:mm

<a class="btn btn-sm btn-primary"  th:href="@{/emp/} + ${emp.id}">编辑</a>