先不连接数据库,后面整合了mybatis再补充
步骤:
1、导入静态资源
下载地址:下载 - KuangStudy
2、在pojo包下写实体类
①Department
//部门表
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Department {
private Integer id;
private String departmentName;
}
②Employee
import java.util.Date;
//员工表
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Employee {
private Integer id;
private String lastName;
private String email;
private Integer gender; //性别,0代表女,1代表男
private Department department;
private Date birth;
}
3、dao层
①DepartmentDao
//部门dao
@Repository
public class DepartmentDao {
//模拟数据库中的数据
private static Map<Integer, Department> departments = null;
static {
departments = new HashMap<Integer, Department>(); //创建一个部门表
departments.put(101, new Department(101,"研发部"));
departments.put(102, new Department(102,"销售部"));
departments.put(103, new Department(103,"运维部"));
departments.put(104, new Department(104,"财务部"));
departments.put(105, new Department(105,"市场部"));
}
//查所有的部门
public Collection<Department> getDepartments(){
return departments.values();
}
//通过id查部门
public Department getDepartmentById(Integer id){
return departments.get(id);
}
}
②EmployeeDao
//员工Dao
@Repository
public class EmployeeDao {
//模拟数据库中的数据
private static Map<Integer, Employee> employees = null;
//员工有所属的部门
@Autowired
private DepartmentDao departmentDao;
static {
employees = new HashMap<Integer, Employee>(); //创建一个员工表
employees.put(1001,new Employee(1001,"张一","1231@qq.com",1,new Department(101,"研发部"),new Date()));
employees.put(1002,new Employee(1002,"张二","1232@qq.com",0,new Department(101,"研发部"),new Date()));
employees.put(1003,new Employee(1003,"张三","1233@qq.com",1,new Department(102,"销售部"),new Date()));
employees.put(1004,new Employee(1004,"张四","1234@qq.com",1,new Department(104,"财务部"),new Date()));
employees.put(1005,new Employee(1005,"张五","1235@qq.com",1,new Department(105,"市场部"),new Date()));
}
//主键自增
private static Integer initId = 10086;
//增加或者修改一个员工
public void save(Employee employee){
if(employee.getId() == null){
employee.setId(initId++);
}
//从前端只传过来部门id的情况下,获取部门全部信息,再set进员工对象
employee.setDepartment(departmentDao.getDepartmentById(employee.getDepartment().getId()));
employees.put(employee.getId(),employee);
}
//查询全部员工
public Collection<Employee> getAll(){
return employees.values();
}
//通过id删除员工
public void delete(Integer id){
employees.remove(id);
}
//通过id查询员工
public Employee getEmployeeByID(Integer id) {
return employees.get(id);
}
}
4、首页
①自定义视图跳转
@Configuration
public class MyMvcConfig implements WebMvcConfigurer {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("index");
registry.addViewController("/index.html").setViewName("index");
}
}
②在index.html中引入thymeleaf,并把连接改为thymeleaf格式
同理,更改404.html、dashboard.html、list.html页面格式
③访问首页
5、国际化
①先把所有编码改为utf-8
②编写配置文件
③在application.properties中指定国际化配置文件的真实位置
#我们国际化配置文件的真实位置
spring.messages.basename=i18n.login
④在index.html中用#号取值(国际化要用#取值)
⑤给中英文的按钮添加链接,并携带参数
⑥ 自定义地区解析器
public class MyLocaleResolver implements LocaleResolver {
//解析请求
@Override
public Locale resolveLocale(HttpServletRequest request) {
//获取请求中的语言参数
String language = request.getParameter("l");
Locale locale = Locale.getDefault(); //如果没有,就使用默认的
//如果请求的链接携带了国际化的参数
if(!StringUtils.isEmpty(language)){
//把language按_分割为语言和国家
//比如:zh_CN中的zh是中文,CN是中国 en_US中的en是英文,US是美国
String[] split = language.split("_");
locale = new Locale(split[0],split[1]);
}
return locale;
}
@Override
public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
}
}
⑦把自定义的地区解析器注册到bean中
//自定义的国际化组件就生效了
@Bean
public LocaleResolver localeResolver(){
return new MyLocaleResolver();
}
⑧测试一下
6、登录功能实现
①把表单提交路径改为 /user/login 并且表单提交数据需要name属性,所以把name也加上
②在controller包下,编写一个LoginController
@Controller
public class LoginController {
@RequestMapping("/user/login")
public String login(@RequestParam("username") String username, @RequestParam("password") String password, Model model, HttpSession session){
//具体的业务
if (!StringUtils.isEmpty(username) && "123456".equals(password)) { //登录成功
return "redirect:/main.html";
}else {
//告诉用户,你登录失败了
model.addAttribute("msg","用户名或者密码错误,登录失败");
return "index";
}
}
}
③把登录失败时,设置的msg属性,展示在index.html
④把登录成功时,重定向的main.html注册到 MyMvcConfig 中
⑤测试一下
登录失败:
登录成功:
7、登录拦截器
之前的登录有一个问题:我们不登录,直接在地址栏访问main.html也可以进入这个页面
所以我们需要设置拦截器
①用户登录成功,把用户名存入session中
②自定义拦截器
public class LoginHandlerInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//登录成功之后,用户有session
Object loginUser = request.getSession().getAttribute("loginUser");
if(loginUser == null){ //没有登录
request.setAttribute("msg","没有权限,请先登录");
request.getRequestDispatcher("/index.html").forward(request,response);
return false;
}else {
return true;
}
}
}
③将拦截器注册到 MyMvcConfig 中
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new LoginHandlerInterceptor())
.addPathPatterns("/**")
.excludePathPatterns("/index.html","/","/user/login","/css/*","/img/*","/js/*");
}
④测试一下
直接访问main.html:
登录成功进入main.html:
⑤优化:把Company name改为登录时输入的用户名
⑥再测试一下
8、展示员工列表
1)把list.html和dashboard.html的公共部分 (顶部导航栏和侧边栏)提取出来,放到commons.html中,再把公共部分引入到list.html和dashboard.html中
①抽取公共部分到commons.html页面中
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<!--顶部导航栏-->
<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/#">[[${session.loginUser}]]</a>
<input class="form-control form-control-dark w-100" type="text" placeholder="Search" aria-label="Search">
<ul class="navbar-nav px-3">
<li class="nav-item text-nowrap">
<a class="nav-link" href="http://getbootstrap.com/docs/4.0/examples/dashboard/#">Sign out</a>
</li>
</ul>
</nav>
<!--侧边栏-->
<nav class="col-md-2 d-none d-md-block bg-light sidebar" th:fragment="sidebar">
<div class="sidebar-sticky">
<ul class="nav flex-column">
<li class="nav-item">
<a th:class="${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="@{/emps}">
<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 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>
②在dashboard.html中引入公共部分
③在 list.html中引入公共部分
其中,传入的参数是用来判断高亮的
2)在list.html页面中遍历员工信息
<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="${emp.getId()}"></td>
<td th:text="${emp.getLastName()}"></td>
<td th:text="${emp.getEmail()}"></td>
<td th:text="${emp.getGender()==0?'女':'男'}"></td>
<td th:text="${emp.getDepartment().getDepartmentName()}"></td>
<td th:text="${#dates.format(emp.getBirth(),'yyyy-MM-dd HH:mm:ss')}"></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)显示结果
9、增加员工实现
①在list页面增加一个添加员工的按钮
<a class="btn btn-sm btn-success" th:href="@{/add}">添加员工</a>
②编写对应的controller
@GetMapping("/add")
public String toAddPage(Model model){
//查出所有部门
Collection<Department> departments = departmentDao.getDepartments();
model.addAttribute("departments",departments);
return "emp/add";
}
③编写emp/add页面(顶部导航栏、侧边栏与list.html一样)
<form th:action="@{/add}" method="post">
<div class="form-group">
<label>LastName</label>
<input type="text" name="lastName" class="form-control" placeholder="lastname:zsr">
</div>
<div class="form-group">
<label>Email</label>
<input type="email" name="email" class="form-control" placeholder="email:xxxxx@qq.com">
</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">
<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>
<div class="form-group">
<label>department</label>
<!--注意这里的name是department.id,因为传入的参数为id-->
<select class="form-control" name="department.id">
<option th:each="department:${departments}" th:text="${department.getDepartmentName()}" th:value="${department.getId()}"></option>
</select>
</div>
<div class="form-group">
<label>Birth</label>
<input type="text" name="birth" class="form-control" placeholder="birth:yyyy/MM/dd">
</div>
<button type="submit" class="btn btn-primary">添加</button>
</form>
点击添加按钮,表单会提交到
th:action="@{/add}" method="post"
④编写对应的controller
@PostMapping("/add")
public String addEmp(Employee employee){
employeeDao.save(employee);
//增删改查的时候要用重定向,不然可能会出现表单重复提交
return "redirect:/emps";
}
⑤测试一下
点击添加按钮,确实添加成功了
10、修改员工信息
①在list.html中,把编辑按钮改成超链接
<a class="btn btn-sm btn-primary" th:href="@{/update/}+${emp.getId()}">编辑</a>
②编写controller
@GetMapping("/update/{id}")
public String update(@PathVariable("id")Integer id, Model model){
//查出原来的数据
Employee employee = employeeDao.getEmployeeByID(id);
model.addAttribute("emp",employee);
//查出所有部门
Collection<Department> departments = departmentDao.getDepartments();
model.addAttribute("departments",departments);
return "emp/update";
}
③编写 emp/update.html页面(顶部导航栏和侧边栏都跟list.html一样)
<main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4">
<form th:action="@{/updateEmp}" method="post">
<input type="hidden" name="id" th:value="${emp.getId()}">
<div class="form-group">
<label>LastName</label>
<input th:value="${emp.getLastName()}" type="text" name="lastName" class="form-control"
placeholder="lastname:zsr">
</div>
<div class="form-group">
<label>Email</label>
<input th:value="${emp.getEmail()}" type="email" name="email" class="form-control"
placeholder="email:xxxxx@qq.com">
</div>
<div class="form-group">
<label>Gender</label><br/>
<div class="form-check form-check-inline">
<input th:checked="${emp.getGender()==1}" 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 th:checked="${emp.getGender()==0}" class="form-check-input" type="radio"
name="gender" value="0">
<label class="form-check-label">女</label>
</div>
</div>
<div class="form-group">
<label>department</label>
<!--注意这里的name是department.id,因为传入的参数为id-->
<select class="form-control" name="department.id">
<option th:selected="${department.getId()==emp.department.getId()}"
th:each="department:${departments}" th:text="${department.getDepartmentName()}"
th:value="${department.getId()}">
</option>
</select>
</div>
<div class="form-group">
<label>Birth</label>
<input th:value="${#dates.format(emp.getBirth(),'yyyy/MM/dd')}" type="text" name="birth" class="form-control"
placeholder="birth:yy/MM/dd">
</div>
<button type="submit" class="btn btn-primary">修改</button>
</form>
</main>
④点击修改按钮后,表单提交到 /updateEmp 编写对应的controller
@PostMapping("/updateEmp")
public String updateEmp(Employee employee){
employeeDao.save(employee);
return "redirect:/emps";
}
11、删除员工
①将list.html中的删除按钮更改为超链接
<a th:href="@{/delete/}+${emp.getId()}" class="btn btn-sm btn-danger">删除</a>
②编写对应的controller
@GetMapping("/delete/{id}")
public String delete(@PathVariable("id") Integer id){
employeeDao.delete(id);
return "redirect:/emps";
}
12、404处理
在resources目录下,新建一个error目录,在error目录下建一个404.html,springboot会自动识别,如果是500错误,在error下创建500.html就行了
13、注销
①在顶部导航栏中,编写注销链接
<a class="nav-link" th:href="@{/logout}">注销</a>
②编写controller
@GetMapping("/logout")
public String logout(HttpSession session){
session.invalidate();
return "redirect:/index.html";
}