Spring Boot项目实践-员工管理系统（九）·删除及注销功能实现
本次实战项目主要是借鉴b站上的视频资源【狂神说Java】SpringBoot最新教程IDEA版通俗易懂完成的，有需求的话，可以直接去b站观看完整的视频教程，本文若有不对之处，望不吝赐教，谢谢~
博文前提：
- Spring Boot项目实践-员工管理系统（一）·准备工作
- Spring Boot项目实践-员工管理系统（二）·首页实现
- Spring Boot项目实践-员工管理系统（三）·国际化
- Spring Boot项目实践-员工管理系统（四）·登录功能实现
- Spring Boot项目实践-员工管理系统（五）·登录拦截器
- Spring Boot项目实践-员工管理系统（六）·展示员工列表
- Spring Boot项目实践-员工管理系统（七）·增加员工实现
- Spring Boot项目实践-员工管理系统（八）·修改员工信息
一、在员工控制器（EmployeeController）里面新增“删除员工方法”
/**
* 删除员工
* @param employeeId
* @return
*/
@GetMapping("/delete/{employeeId}")
public String delete(@PathVariable("employeeId")Integer employeeId){
//删除员工
employeeDao.deleteEmployeeById(employeeId);
return "redirect:/employees";
}
二、修改员工展示页面（list.html）
原先“删除”是按钮的形式，现在将其改为超链接的形式。
<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 Bootstraptitle>
<link th:href="@{/css/bootstrap.min.css}" rel="stylesheet">
<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>
<div th:replace="~{commons/common::topbar}">div>
<div class="container-fluid">
<div class="row">
<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">
<h2>
<a class="btn btn-sm btn-success" th:href="@{/add}">添加员工a>
h2>
<div class="table-responsive">
<table class="table table-striped table-sm">
<thead>
<tr>
<th>idth>
<th>usernameth>
<th>emailth>
<th>genderth>
<th>departmentth>
<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()}">编辑a>
<a class="btn btn-sm btn-danger" th:href="@{/delete/}+${employee.getEmployeeId()}">删除a>
td>
tr>
tbody>
table>
div>
main>
div>
div>
<script type="text/javascript" src="/js/jquery-3.2.1.slim.min.js">script>
<script type="text/javascript" src="/js/popper.min.js">script>
<script type="text/javascript" src="/js/bootstrap.min.js">script>
<script type="text/javascript" src="/js/feather.min.js">script>
<script>
feather.replace()
script>
<script type="text/javascript" src="/js/Chart.min.js">script>
<script>
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
type: 'line',
data: {
labels: ["Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"],
datasets: [{
data: [15339, 21345, 18483, 24003, 23489, 24092, 12034],
lineTension: 0,
backgroundColor: 'transparent',
borderColor: '#007bff',
borderWidth: 4,
pointBackgroundColor: '#007bff'
}]
},
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero: false
}
}]
},
legend: {
display: false,
}
}
});
script>
body>
html>
三、启动项目，验证删除功能
启动项目后，打开员工展示页面，点击所要删除员工的删除链接，即可进行删除操作。
删除成功。
四、修改common.html文件并在登录控制器中编写相应的注销方法
由于要实现注销功能，因此要将前端页面相应的注销新增其在登录控制器中对应的链接。
common.html
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<nav class="navbar navbar-dark sticky-top bg-dark flex-md-nowrap p-0" th:fragment="topbar">
<a class="navbar-brand col-sm-3 col-md-2 mr-0" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">[[${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}">注销a>
li>
ul>
nav>
<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="${active=='main.html' ? 'nav-link active':'nav-link'}" th:href="@{/index.html}">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"
fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
stroke-linejoin="round" class="feather feather-home">
<path d="M3 9l9-7 9 7v11a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2z">path>
<polyline points="9 22 9 12 15 12 15 22">polyline>
svg>
首页 <span class="sr-only">(current)span>
a>
li>
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"
fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
stroke-linejoin="round" class="feather feather-file">
<path d="M13 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V9z">path>
<polyline points="13 2 13 9 20 9">polyline>
svg>
Orders
a>
li>
<li class="nav-item">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">
<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"
fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
stroke-linejoin="round" class="feather feather-shopping-cart">
<circle cx="9" cy="21" r="1">circle>
<circle cx="20" cy="21" r="1">circle>
<path d="M1 1h4l2.68 13.39a2 2 0 0 0 2 1.61h9.72a2 2 0 0 0 2-1.61L23 6H6">path>
svg>
Products
a>
li>
<li class="nav-item">
<a th:class="${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>
员工管理
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 reportsspan>
<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
/**
* 注销
* @param session
* @return
*/
@RequestMapping("/user/logout")
public String logout(HttpSession session){
//使session失效
session.invalidate();
return "redirect:/index.html";
}
启动项目，登录成功后，点击“注销”，
注销成功后会跳转到首页
五、总结
自此，“员工管理系统”的基本功能已完成，虽然此项目可能比较简陋，并且也没用到数据库，但是项目的逻辑非常清晰，b站上老师也讲得很清楚，非常适合入门学习。强烈推荐大家去观看老师的视频进行学习。
2020.04.13