我们这里就不在设计数据库,在类中设计模拟数据库即可。
首页配置:
1.注意点,在这里所有页面的静态资源都需要使用thymeleaf接管;
2.url:@{}
国际化
首先分析源码
源码分析
- 1.我们需要配置i18n文件
- 2.我们如果需要在项目中进行按钮自动切换,我们需要自定义一个组件LocaleResolver
- 3.记得将自己写的组件配置到spring容器@Bean
- 4.#{ }
先创建文件,文件内的properties文件创建了上层文件会自动生成,
国际化的源码可以看出可以设置的参数属性
在Bundle中可以进行可视化的编辑
index.html(首页):
<!DOCTYPE html>
<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>Signin 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/signin.css}" rel="stylesheet">
</head>
<body class="text-center">
<form class="form-signin" action="dashboard.html">
<img class="mb-4" 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>
<input type="text" class="form-control" th:placeholder="#{login.username}" required="" autofocus="">
<input type="password" class="form-control" 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">[[#{login.btn}]]</button>
<p class="mt-5 mb-3 text-muted">© 2017-2018</p>
<a class="btn btn-sm" th:href="@{/index.html(l='zh_CN')}">中文</a>
<a class="btn btn-sm" th:href="@{/index.html(l='en_US')}">English</a>
</form>
</body>
</html>
自定义国际化解析器(LocaleResolver 的方法名必须为localeResolver,否则会报错)
public class MyLocalResolver implements LocaleResolver {
//解析请求
@Override
public Locale resolveLocale(HttpServletRequest httpServletRequest) {
//获取请求中的语言参数:请求里面带了l的都会走这个请求
String language = httpServletRequest.getParameter("l");//解析参数这个l来自th:href="@{/index.html(l='zh_CN')}"从而实现解析
Locale locale = Locale.getDefault();//如果没有就使用默认的
//如果请求的连接携带了国际化的参数
if (!StringUtils.isEmpty(language)){
//zh__CN
String[] split = language.split("_");
//国家地区
locale = new Locale(split[0], split[1]);
}
return locale;
}
@Override
public void setLocale(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Locale locale) {
}
}
在MyMvcConfig中注册
//自定义的国际化组件就生效了
@Bean //将组件注册在容器
public LocaleResolver localeResolver(){
return new MyLocalResolver();
}
实现效果
登录功能的实现
对首页的改动比如用户名或密码错误的提示等等
<!DOCTYPE html>
<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>Signin 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/signin.css}" rel="stylesheet">
</head>
<body class="text-center">
<form class="form-signin" th:action="@{/user/login}">
<img class="mb-4" 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>
<!--如果msg 为空,则不显示消息-->
<p style="color: red" th:text="${msg}" th:if="${not #strings.isEmpty(msg)}"></p>
<input type="text" name="username" class="form-control" th:placeholder="#{login.username}" required="" autofocus="">
<input type="password" name="password" class="form-control" 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">[[#{login.btn}]]</button>
<p class="mt-5 mb-3 text-muted">© 2017-2018</p>
<a class="btn btn-sm" th:href="@{/index.html(l='zh_CN')}">中文</a>
<a class="btn btn-sm" th:href="@{/index.html(l='en_US')}">English</a>
</form>
</body>
</html>
登录功能
@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)){
session.setAttribute("loginUser",username);
System.out.println("-----------");
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!");
return "index";
}
}
}
在MyMvcConfig定制页面的跳转
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("index");
registry.addViewController("/index.html").setViewName("index");
//浏览器发送 /main.html 请求来到dashboard.html页面
registry.addViewController("/main.html").setViewName("dashboard");
}
实现效果
故意输入错误密码
登录成功后的页面
登录拦截器
实现拦截器
/**
* @author acoffee
* @create 2021-08-05 12:53
*/
public class LoginHandlerInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//登录成功之后,应该有用户的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;
}
}
}
注册拦截器(MyMvcConfig类中)
//注册拦截器
@Override
public void addInterceptors(InterceptorRegistry registry) {
//将静态资源排除在拦截之外 ("/index.html","/","/user/login","/css/*","/js/**","/img/**")
//"/**":意思是所有请求都拦截,excludePathPatterns:除了那些文件不拦截
registry.addInterceptor(new LoginHandlerInterceptor()).addPathPatterns("/**").excludePathPatterns("/index.html","/","/user/login","/css/*","/js/**","/img/**");
}
员工列表展示
1.提取公共页面
1.th:fragment="sidebar"
2. th:replace="~{commons /commons : :topbar}"
3.如果要传递参数,可以直接使用()传参,接收判断即可!│
2.列表循环展示
<div class="container-fluid">
<div class="row">
<div th:insert="~{/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>Section title</h2>
<div class="table-responsive">
<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.department.getDepartmentName()}"></td>
<td th:text="${#dates.format(emp.getBirth(),'yyyy-MM-dd HH:mm:ss')}"></td>
<td>
<button class="btn btn-sm btn-primary">编辑</button>
<button class="btn btn-sm btn-danger">删除</button>
</td>
</tr>
</tbody>
</table>
</div>
</main>
</div>
</div>
在EmployeeController中加入添加员工的方法
@PostMapping("/emp")
public String addEmp(Employee employee){
System.out.println("save→"+employee);
employeeDao.save(employee);//调用底层业务方法保存员工信息
//添加的组件 forward
return "redirect:/emps";
}
实现效果
添加员工
添加页面我们直接用list.html改一下就可以了因为侧边栏和顶部栏是一样的
<div class="container-fluid">
<div class="row">
<div th:insert="~{/commons/common::sidebar(active='list.html')}"></div>
<main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4">
<form th:action="@{/emp}" method="post">
<div class="form-group">
<label>LastName</label>
<input type="text" name="lastName" class="form-control" placeholder="acoffee">
</div>
<div class="form-group">
<label>Email</label>
<input type="email" name="email" class="form-control" placeholder="[email protected]">
</div>
<div class="form-group">
<label>Gender</label><br/>
<div class="form-check form-check-inline">
<input class="form-check-input" type="radio" name="gender" value="1">
<label class="form-check-labe1">男</label>
</div>
<div class="form-check form-check-inline">
<input class="form-check-input" type="radio" name="gender" value="e">
<label class="form-check-labe1">女</label>
</div>
</div>
<div class="form-group">
<label>department</label>
<!--我们在controller接收的是一个Employee,所以我们需要提交的是其中的一个属性-->
<select class="form-control" name="department.id">
<option th:each="dept:${departments}" th:text="${dept.getDepartmentName()}"
th:value="${dept.getId()}">
</option>
</select>
</div>
<div elass="form-group">
<label>Birth</label>
<input type="text" name="birth" class="form-control" placeholder="acoffee"></div>
<button type="submit" class="btn btn-primary">添加</button>
</form>
</main>
</div>
</div>
时间格式的问题
当我们不去配置配置文件直接去添加2012-1-1这种时间格式,是会报以下错误的,因为当我们不去配置时间格式的时候它会默认2012/1/1这种斜杠的格式才是正确的,所以要么我们去配置文件中配置,要么我们就是用这种默认的时间格式
从源码中我们也可以看出
修改功能
update.html表单
<div class="container-fluid">
<div class="row">
<div th:insert="~{/commons/common::sidebar(active='list.html')}"></div>
<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="acoffee">
</div>
<div class="form-group">
<label>Email</label>
<input th:value="${emp.getEmail()}" type="email" name="email" class="form-control" placeholder="[email protected]">
</div>
<div class="form-group">
<label>Gender</label><br/>
<div class="form-check form-check-inline">
<input th:checked="${emp.getGender()==1}" class="form-check-input" type="radio" name="gender" value="1">
<label class="form-check-labe1">男</label>
</div>
<div class="form-check form-check-inline">
<input th:checked="${emp.getGender()==0}" class="form-check-input" type="radio" name="gender" value="e">
<label class="form-check-labe1">女</label>
</div>
</div>
<div class="form-group">
<label>department</label>
<!--我们在controller接收的是一个Employee,所以我们需要提交的是其中的一个属性-->
<select class="form-control" name="department.id">
<option th:selected="${dept.getId()==emp.getDepartment().getId()}" th:each="dept:${departments}" th:text="${dept.getDepartmentName()}"
th:value="${dept.getId()}">
</option>
</select>
</div>
<div elass="form-group">
<label>Birth</label>
<input th:value="${#dates.format(emp.getBirth(),'yyyy-MM-dd HH:mm')}" type="text" name="birth" class="form-control" placeholder="acoffee">
</div>
<button type="submit" class="btn btn-primary">修改</button>
</form>
</main>
</div>
</div>
添加功能
//去员工的修改页面
@GetMapping("/emp/{id}")
public String toUpdateEmp(@PathVariable("id")Integer id,Model model){
//查出原来的数据
Employee employee = employeeDao.getEmployeeById(id);
model.addAttribute("emp",employee);
//查出所有部门的信息
Collection<Department> departments = departmentDao.getDepartments();
model.addAttribute("departments",departments);
return "emp/update";
}
@PostMapping("/updateEmp")
public String updateEmp(Employee employee){
employeeDao.save(employee);
return "redirect:/emps";
}
实现效果
删除功能
在list.html表单中添加删除跳转
<td>
<a class="btn btn-sm btn-primary" th:href="@{/emp/{id}/(id=${emp.getId()})}">编辑</a>
<a class="btn btn-sm btn-danger" th:href="@{/delemp/{id}/(id=${emp.getId()})}">删除</a>
</td>
删除功能
//删除员工
@GetMapping("/delemp/{id}")
public String deleteEmp(@PathVariable("id")int id){
employeeDao.delete(id);
return "redirect:/emps";
}
功能实现
404处理
直接在templates中创建一个error文件夹将404的页面放入其中即可,springBoot会自动帮我们去找,其他异常同理,如500等
实现效果
注销功能
每个页面都有注销功能,所以在这个功能我们加载commons.html表单中
<li class="nav-item text-nowrap">
<a class="nav-link" th:href="@{/user/logout}">注销</a>
</li>
注销功能在loginController中
//注销功能
@RequestMapping("/user/logout")
public String logout(HttpSession session){
session.invalidate();
return "redirect:index.html";
}