Spring Boot項目實踐-員工管理系統（九）·刪除及註銷功能實現

本次實戰項目主要是借鑑b站上的視頻資源【狂神說Java】SpringBoot最新教程IDEA版通俗易懂完成的，有需求的話，可以直接去b站觀看完整的視頻教程，本文若有不對之處，望不吝賜教，謝謝~
博文前提：

一、在員工控制器（EmployeeController）裏面新增“刪除員工方法”

/**
     * 刪除員工
     * @param employeeId
     * @return
     */
    @GetMapping("/delete/{employeeId}")
    public String delete(@PathVariable("employeeId")Integer employeeId){
        //刪除員工
        employeeDao.deleteEmployeeById(employeeId);
        return "redirect:/employees";
    }

二、修改員工展示頁面（list.html）

原先“刪除”是按鈕的形式，現在將其改爲超鏈接的形式。

<!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="@{/css/bootstrap.min.css}" rel="stylesheet">

    <!-- Custom styles for this template -->
    <link th:href="@{/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>

<!--頂部導航欄-->
<div th:replace="~{commons/common::topbar}"></div>

<div class="container-fluid">
    <div class="row">

        <!--側邊欄-->
        <div th:replace="~{commons/common::sidebar(active='list.html')}"></div>

        <main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4">

            <!--添加員工按鈕-->
            <h2>
                <a class="btn btn-sm btn-success" th:href="@{/add}">添加員工</a>
            </h2>


            <div class="table-responsive">
                <table class="table table-striped table-sm">
                    <thead>
                        <tr>
                            <th>id</th>
                            <th>username</th>
                            <th>email</th>
                            <th>gender</th>
                            <th>department</th>
                            <th>操作</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr th:each="employee:${employees}">
                            <td th:text="${employee.getEmployeeId()}"></td>
                            <td th:text="${employee.getEmployeeName()}"></td>
                            <td th:text="${employee.getEmail()}"></td>
                            <td th:text="${employee.getGender()==0 ? '女':'男'}"></td>
                            <td th:text="${employee.department.getDepartmentName()}"></td>
                            <td th:text="${#dates.format(employee.getBirth(),'yyyy-MM-dd HH:mm:ss')}"></td>
                            <td>
                                <a class="btn btn-sm btn-primary" th:href="@{/update/}+${employee.getEmployeeId()}">編輯</a>
                                <a class="btn btn-sm btn-danger" th:href="@{/delete/}+${employee.getEmployeeId()}">刪除</a>
                            </td>
                        </tr>
                    </tbody>
                </table>
            </div>
        </main>

    </div>
</div>

<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script type="text/javascript" src="/js/jquery-3.2.1.slim.min.js"></script>
<script type="text/javascript" src="/js/popper.min.js"></script>
<script type="text/javascript" src="/js/bootstrap.min.js"></script>

<!-- Icons -->
<script type="text/javascript" src="/js/feather.min.js"></script>
<script>
    feather.replace()
</script>

<!-- Graphs -->
<script type="text/javascript" src="/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>

三、啓動項目，驗證刪除功能

啓動項目後，打開員工展示頁面，點擊所要刪除員工的刪除鏈接，即可進行刪除操作。

刪除成功。

四、修改common.html文件並在登錄控制器中編寫相應的註銷方法

由於要實現註銷功能，因此要將前端頁面相應的註銷新增其在登錄控制器中對應的鏈接。
common.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">


<!--頂部導航欄-->
<nav class="navbar navbar-dark sticky-top bg-dark flex-md-nowrap p-0" th:fragment="topbar">
    <a class="navbar-brand col-sm-3 col-md-2 mr-0" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">[[${session.loginUser}]]</a>
    <input class="form-control form-control-dark w-100" type="text" placeholder="Search" aria-label="Search">
    <ul class="navbar-nav px-3">
        <li class="nav-item text-nowrap">
            <a class="nav-link" th:href="@{/user/logout}">註銷</a>
        </li>
    </ul>
</nav>


<!--側邊欄-->
<nav class="col-md-2 d-none d-md-block bg-light sidebar" th:fragment="sidebar">
    <div class="sidebar-sticky">
        <ul class="nav flex-column">
            <li class="nav-item">
                <a th:class="${active=='main.html' ? 'nav-link active':'nav-link'}" th:href="@{/index.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>
                    首頁 <span class="sr-only">(current)</span>
                </a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
                    <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-file">
                        <path d="M13 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V9z"></path>
                        <polyline points="13 2 13 9 20 9"></polyline>
                    </svg>
                    Orders
                </a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
                    <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-shopping-cart">
                        <circle cx="9" cy="21" r="1"></circle>
                        <circle cx="20" cy="21" r="1"></circle>
                        <path d="M1 1h4l2.68 13.39a2 2 0 0 0 2 1.61h9.72a2 2 0 0 0 2-1.61L23 6H6"></path>
                    </svg>
                    Products
                </a>
            </li>
            <li class="nav-item">
                <a th:class="${active=='list.html' ? 'nav-link active':'nav-link'}" th:href="@{/employees}">
                    <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>
                    員工管理
                </a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
                    <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-bar-chart-2">
                        <line x1="18" y1="20" x2="18" y2="10"></line>
                        <line x1="12" y1="20" x2="12" y2="4"></line>
                        <line x1="6" y1="20" x2="6" y2="14"></line>
                    </svg>
                    Reports
                </a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
                    <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-layers">
                        <polygon points="12 2 2 7 12 12 22 7 12 2"></polygon>
                        <polyline points="2 17 12 22 22 17"></polyline>
                        <polyline points="2 12 12 17 22 12"></polyline>
                    </svg>
                    Integrations
                </a>
            </li>
        </ul>

        <h6 class="sidebar-heading d-flex justify-content-between align-items-center px-3 mt-4 mb-1 text-muted">
            <span>Saved reports</span>
            <a class="d-flex align-items-center text-muted"
               href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
                <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-plus-circle">
                    <circle cx="12" cy="12" r="10"></circle>
                    <line x1="12" y1="8" x2="12" y2="16"></line>
                    <line x1="8" y1="12" x2="16" y2="12"></line>
                </svg>
            </a>
        </h6>
        <ul class="nav flex-column mb-2">
            <li class="nav-item">
                <a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
                    <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-file-text">
                        <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"></path>
                        <polyline points="14 2 14 8 20 8"></polyline>
                        <line x1="16" y1="13" x2="8" y2="13"></line>
                        <line x1="16" y1="17" x2="8" y2="17"></line>
                        <polyline points="10 9 9 9 8 9"></polyline>
                    </svg>
                    Current month
                </a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
                    <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-file-text">
                        <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"></path>
                        <polyline points="14 2 14 8 20 8"></polyline>
                        <line x1="16" y1="13" x2="8" y2="13"></line>
                        <line x1="16" y1="17" x2="8" y2="17"></line>
                        <polyline points="10 9 9 9 8 9"></polyline>
                    </svg>
                    Last quarter
                </a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
                    <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-file-text">
                        <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"></path>
                        <polyline points="14 2 14 8 20 8"></polyline>
                        <line x1="16" y1="13" x2="8" y2="13"></line>
                        <line x1="16" y1="17" x2="8" y2="17"></line>
                        <polyline points="10 9 9 9 8 9"></polyline>
                    </svg>
                    Social engagement
                </a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
                    <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-file-text">
                        <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"></path>
                        <polyline points="14 2 14 8 20 8"></polyline>
                        <line x1="16" y1="13" x2="8" y2="13"></line>
                        <line x1="16" y1="17" x2="8" y2="17"></line>
                        <polyline points="10 9 9 9 8 9"></polyline>
                    </svg>
                    Year-end sale
                </a>
            </li>
        </ul>
    </div>
</nav>

</html>

LoginController.java

/**
     * 註銷
     * @param session
     * @return
     */
    @RequestMapping("/user/logout")
    public String logout(HttpSession session){
        //使session失效
        session.invalidate();

        return "redirect:/index.html";

    }

啓動項目，登錄成功後，點擊“註銷”，

註銷成功後會跳轉到首頁

五、總結

自此，“員工管理系統”的基本功能已完成，雖然此項目可能比較簡陋，並且也沒用到數據庫，但是項目的邏輯非常清晰，b站上老師也講得很清楚，非常適合入門學習。強烈推薦大家去觀看老師的視頻進行學習。

2020.04.13

Spring Boot項目實踐-員工管理系統（九）·刪除及註銷功能實現

一、在員工控制器（EmployeeController）裏面新增“刪除員工方法”

二、修改員工展示頁面（list.html）

三、啓動項目，驗證刪除功能

四、修改common.html文件並在登錄控制器中編寫相應的註銷方法

五、總結

Kafka存儲機制

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Spring Boot項目實踐-員工管理系統（二）·首頁實現

Spring Boot項目實踐-員工管理系統（六）·展示員工列表

leetcode-28. 實現 strStr()

leetcode-26. 刪除排序數組中的重複項

Vue學習（一）-簡單入門實例

https://yachay.unat.edu.pe/blog/index.php?comment_area=format_blog&comment_component=blog&comment_co

linux以太網驅動總結