一、
@RequestMapping(value = {"/", "/index.html"}, method = RequestMethod.GET)
public String login() {
return "login";
}
@Configuration
public class MyMvcConfig extends WebMvcConfigurerAdapter {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
// super.addViewControllers(registry);
//浏览器发送 /njf 请求来到 success
registry.addViewController("/njf").setViewName("success");
}
//所有的WebMvcConfigurerAdapter组件都会一起起作用
@Bean //将组件注册在容器
public WebMvcConfigurerAdapter webMvcConfigurerAdapter(){
WebMvcConfigurerAdapter adapter = new WebMvcConfigurerAdapter() {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("login");
registry.addViewController("/index.html").setViewName("login");
}
};
return adapter;
}
}
二、国际化
SpringMVC 国际化:
(1)编写国际化配置文件;
(2)使用ResourceBundleMessageSource管理国际化资源文件;
(3)在页面使用fmt:message取出国际化内容;
1、编写国际化配置文件,编写国际化配置文件,抽取页面需要显示的国际化消息
login.properties
login.btn=登陆
login.password=密码
login.remember=记住我
login.tip=请登陆
login.username=用户名
login_zh_CN.properties
login.btn=登陆
login.password=密码
login.remember=记住我
login.tip=请登陆
login.username=用户名
login_en_US.properties
login.btn=Sign in
login.password=Password
login.remember=Remember me
login.tip=Please sign in
login.username=Username
2、SpringBoot自动配置好了管理国际化资源文件的组件;
@ConfigurationProperties(prefix = "spring.messages")
public class MessageSourceAutoConfiguration {
/**
* Comma-separated list of basenames (essentially a fully-qualified classpath
* location), each following the ResourceBundle convention with relaxed support for
* slash based locations. If it doesn't contain a package qualifier (such as
* "org.mypackage"), it will be resolved from the classpath root.
*/
private String basename = "messages";
//我们的配置文件可以直接放在类路径下叫 messages.properties;
@Bean
public MessageSource messageSource() {
ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
if (StringUtils.hasText(this.basename)) {
//设置国际化资源文件的基础名(去掉语言国家代码的)
messageSource.setBasenames(StringUtils.commaDelimitedListToStringArray(
StringUtils.trimAllWhitespace(this.basename)));
}
if (this.encoding != null) {
messageSource.setDefaultEncoding(this.encoding.name());
}
messageSource.setFallbackToSystemLocale(this.fallbackToSystemLocale);
messageSource.setCacheSeconds(this.cacheSeconds);
messageSource.setAlwaysUseMessageFormat(this.alwaysUseMessageFormat);
return messageSource;
}
}
去配置文件中指定basename:
#https://blog.csdn.net/weixin_44606513/article/details/105962383
#国际化配置文件(包名.基础名)或者(包名/基础名)
spring.messages.basename=i18n/login
3、去页面获取国际化的值;
<!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 href="asserts/css/bootstrap.min.css" th:href="@{/webjars/bootstrap/4.0.0/css/bootstrap.css}" rel="stylesheet">
<!-- Custom styles for this template -->
<link href="asserts/css/signin.css" th:href="@{/asserts/css/signin.css}" rel="stylesheet">
</head>
<body class="text-center">
<form class="form-signin" action="dashboard.html">
<img class="mb-4" th:src="@{/asserts/img/bootstrap-solid.svg}" src="asserts/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>
<label class="sr-only" th:text="#{login.username}">Username</label>
<input type="text" class="form-control" placeholder="Username" th:placeholder="#{login.username}" required="" autofocus="">
<label class="sr-only" th:text="#{login.password}">Password</label>
<input type="password" class="form-control" placeholder="Password" 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" th:text="#{login.btn}">Sign in</button>
<p class="mt-5 mb-3 text-muted">© 2017-2018</p>
<a class="btn btn-sm">中文</a>
<a class="btn btn-sm">English</a>
</form>
</body>
</html>
效果:根据浏览器语言设置的信息切换了国际化;
原理:国际化Locale(区域信息对象);LocaleResolver(获取区域信息对象);
@Bean
@ConditionalOnMissingBean
@ConditionalOnProperty(prefix = "spring.mvc", name = "locale")
public LocaleResolver localeResolver() {
if (this.mvcProperties
.getLocaleResolver() == WebMvcProperties.LocaleResolver.FIXED) {
return new FixedLocaleResolver(this.mvcProperties.getLocale());
}
//默认的就是根据请求头带来的区域信息获取Locale进行国际化
AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver();
localeResolver.setDefaultLocale(this.mvcProperties.getLocale());
return localeResolver;
}
4、点击链接切换国际化
通过页面传递参数:
<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>
自定义一个国际化解析器,并加入到容器中:
/**
* 可以在连接上携带区域信息
*/
public class MyLocaleResolver implements LocaleResolver {
@Override
public Locale resolveLocale(HttpServletRequest request) {
String l = request.getParameter("l");
Locale locale = Locale.getDefault();
if(!StringUtils.isEmpty(l)){
String[] split = l.split("_");
locale = new Locale(split[0],split[1]);
}
return locale;
}
@Override
public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
}
}
//自定义区域化解析器
@Bean
public LocaleResolver localeResolver(){
return new MyLocaleResolver();
}
三、登录
1、登录表单
<form class="form-signin" action="dashboard.html" th:action="@{/user/login}" method="post">
<img class="mb-4" th:src="@{/asserts/img/bootstrap-solid.svg}" src="asserts/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>
<!--判断,判断条件成立标签才生效-->
<p style="color: red" th:text="${msg}" th:if="${not #strings.isEmpty(msg)}"></p>
<label class="sr-only" th:text="#{login.username}">Username</label>
<input type="text" class="form-control" name="username" th:placeholder="#{login.username}" placeholder="Username" required="" autofocus="">
<label class="sr-only" th:text="#{login.password}">Password</label>
<input type="password" class="form-control" name="password" th:placeholder="#{login.password}" placeholder="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" th:text="#{login.btn}">Sign in</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>
2、登录的控制器
@Controller
public class LoginController {
//@RequestMapping(value = "/user/login", method = RequestMethod.POST)
@PostMapping(value = "/user/login")
public String login(@RequestParam("username") String username,
@RequestParam("password") String password,
Map<String, Object> map) {
if (!StringUtils.isEmpty(username) && "123456".equals(password)) {
//登陆成功,防止表单重复提交,可以重定向到主页
return "redirect:/main.html";
} else {
//登陆失败
map.put("msg", "用户名或密码错误!");
return "login";
}
}
}
添加到主页的视图映射
@Configuration
public class MyMvcConfig extends WebMvcConfigurerAdapter {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
// super.addViewControllers(registry);
//浏览器发送 /njf 请求来到 success
registry.addViewController("/njf").setViewName("success");
}
//所有的WebMvcConfigurerAdapter组件都会一起起作用
@Bean //将组件注册在容器
public WebMvcConfigurerAdapter webMvcConfigurerAdapter(){
WebMvcConfigurerAdapter adapter = new WebMvcConfigurerAdapter() {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("login");
registry.addViewController("/index.html").setViewName("login");
registry.addViewController("/main.html").setViewName("dashboard");
}
};
return adapter;
}
}
3、禁用模板引擎的缓存
# 禁用缓存
spring.thymeleaf.cache=false
4、登陆错误消息的显示
<p style="color: red" th:text="${msg}" th:if="${not #strings.isEmpty(msg)}"></p>
四、拦截器进行登陆检查
1、修改登录控制器方法
@Controller
public class LoginController {
//@RequestMapping(value = "/user/login", method = RequestMethod.POST)
@PostMapping(value = "/user/login")
public String login(@RequestParam("username") String username,
@RequestParam("password") String password,
Map<String, Object> map, HttpSession session) {
if (!StringUtils.isEmpty(username) && "123456".equals(password)) {
session.setAttribute("loginUser", username);
//登陆成功,防止表单重复提交,可以重定向到主页
return "redirect:/main.html";
} else {
//登陆失败
map.put("msg", "用户名或密码错误!");
return "login";
}
}
}
2、新增登录拦截器
/**
* 登陆检查,
*/
public class LoginHandlerInterceptor implements HandlerInterceptor {
//目标方法执行之前
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
Object loginUser = request.getSession().getAttribute("loginUser");
if (loginUser == null) {
//未登录,返回登陆页面
//转发到登录页面
request.setAttribute("msg", "没有权限请先登录");
request.getRequestDispatcher("/").forward(request, response);
return false;
} else {
//已登录,放行请求
return true;
}
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
}
}
3、把拦截器添加到容器中
@Configuration
public class MyMvcConfig extends WebMvcConfigurerAdapter {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
// super.addViewControllers(registry);
//浏览器发送 /njf 请求来到 success
registry.addViewController("/njf").setViewName("success");
}
//所有的WebMvcConfigurerAdapter组件都会一起起作用
@Bean //将组件注册在容器
public WebMvcConfigurerAdapter webMvcConfigurerAdapter(){
WebMvcConfigurerAdapter adapter = new WebMvcConfigurerAdapter() {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("login");
registry.addViewController("/index.html").setViewName("login");
registry.addViewController("/main.html").setViewName("dashboard");
}
//注册拦截器
@Override
public void addInterceptors(InterceptorRegistry registry) {
//super.addInterceptors(registry);
//静态资源; *.css , *.js
//SpringBoot已经做好了静态资源映射
registry.addInterceptor(new LoginHandlerInterceptor()).addPathPatterns("/**")
.excludePathPatterns("/index.html", "/", "/user/login");
}
};
return adapter;
}
//区域化解析器
@Bean
public LocaleResolver localeResolver(){
return new MyLocaleResolver();
}
}
五、Restful 案例
1、实验要求
(1)Restful CRUD
URI: /资源名称/资源标识 HTTP请求方式区分对资源CRUD操作
普通CRUD(uri来区分操作) | RestfulCRUD | |
---|---|---|
查询 | getEmp | emp---GET |
添加 | addEmp?xxx | emp---POST |
修改 | updateEmp?id=xxx&xxx=xx | emp/{id}---PUT |
删除 | deleteEmp?id=1 |
(2)请求架构
实验功能 | 请求URI | 请求方式 |
查询所有员工 | emps | GET |
查询某个员工(来到修改页面) | emp/1 | GET |
来到添加页面 | emp | GET |
添加员工 | emp | POST |
来到修改页面(查出员工进行信息回显) | emp/1 | GET |
修改员工 | emp | PUT |
删除员工 | emp/1 | DELETE |
2、员工列表
(1)页面请求
<a class="nav-link" href="#" th:href="@{/emps}">员工列表</a>
(2)控制器方法
//查询所有员工信息返回列表页面
@GetMapping(value = "/emps")
public String list(Model model) {
Collection<Employee> emps = employeeDao.getAll();
//放在请求与中
model.addAttribute("emps", emps);
//Thymeleaf 默认就会拼串 public static final String DEFAULT_PREFIX = "classpath:/templates/";
// classpath:/templates/emp/list.html
return "emp/list";
}
(3)页面遍历显示(emp/list.html)
<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>Deptment</th>
<th>Birth</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr th:each="emp : ${emps}">
<td th:text="${emp.id}"></td>
<td>[[${emp.lastName}]]</td>
<td th:text="${emp.email}"></td>
<td th:text="${emp.gender} == 0 ? '女' : '男'"></td>
<td th:text="${emp.department.departmentName}"></td>
<td th:text="${#dates.format(emp.birth, 'yyyy-MM-dd HH:mm')}"></td>
<td>
<button class="btn btn-sm btn-primary">编辑</button>
<button class="btn btn-sm btn-danger">删除</button>
</td>
</tr>
</tbody>
</table>
</div>
(4)
1、抽取公共片段
<div th:fragment="copy">
© 2011 The Good Thymes Virtual Grocery
</div>
2、引入公共片段
<div th:insert="~{footer :: copy}"></div>
~{templatename::selector}:模板名::选择器
~{templatename::fragmentname}:模板名::片段名
3、默认效果:
insert的公共片段在div标签中
如果使用th:insert等属性进行引入,可以不用写~{}:
行内写法可以加上:[[~{}]];[(~{})];
三种引入公共片段的 th 属性:
th:insert:将公共片段整个插入到声明引入的元素中
th:replace:将声明引入的元素替换为公共片段
th:include:将被引入的片段的内容包含进这个标签中
示例:
<footer th:fragment="copy">
© 2011 The Good Thymes Virtual Grocery
</footer>
引入方式
<div th:insert="footer :: copy"></div>
<div th:replace="footer :: copy"></div>
<div th:include="footer :: copy"></div>
效果
<div>
<footer>
© 2011 The Good Thymes Virtual Grocery
</footer>
</div>
<footer>
© 2011 The Good Thymes Virtual Grocery
</footer>
<div>
© 2011 The Good Thymes Virtual Grocery
</div>
引用片段的时候传入参数:
<nav class="col-md-2 d-none d-md-block bg-light sidebar" id="sidebar">
<div class="sidebar-sticky">
<ul class="nav flex-column">
<li class="nav-item">
<a class="nav-link active"
th:class="${activeUri=='main.html'?'nav-link active':'nav-link'}"
href="#" th:href="@{/main.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>
Dashboard <span class="sr-only">(current)</span>
</a>
</li>
<!--引入侧边栏;传入参数-->
<div th:replace="commons/bar::#sidebar(activeUri='emps')"></div>
3、员工添加
(1)跳转至添加页面
页面请求:
<a class="btn btn-sm btn-success" href="emp" th:href="@{/emp}">添加</a>
控制器方法:
//跳转到添加页面
@GetMapping(value = "/emp")
public String toAddPage(Model model) {
Collection<Department> departments = departmentDao.getDepartments();
//把部门信息放在请求域中
model.addAttribute("depts", departments);
return "emp/add";
}
(2)添加页面
<form>
<div class="form-group">
<label>LastName</label>
<input type="text" class="form-control" placeholder="zhangsan">
</div>
<div class="form-group">
<label>Email</label>
<input type="email" class="form-control" placeholder="zhangsan@atguigu.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>
<select class="form-control">
<option>1</option>
<option>2</option>
<option>3</option>
<option>4</option>
<option>5</option>
</select>
</div>
<div class="form-group">
<label>Birth</label>
<input type="text" class="form-control" placeholder="zhangsan">
</div>
<button type="submit" class="btn btn-primary">添加</button>
</form>
(3)添加方法
//SpringMVC 自动将请求参数的入参对象的属性进行一一绑定,要求了请求参数的名字和JavaBean入参的对象里面属性名一致
@PostMapping(value = "/emp")
public String addEmp(Employee employee) {
System.out.println("保存的员工信息:" + employee);
employeeDao.save(employee);
//redirect: 重定向到一个地址 / 代表当前项目路径
//forward: 转发到一个地址
return "redirect:/emps";
}
(4)细节问题
日期格式有很多种:如2017-12-12;2017/12/12;2017.12.12;
默认日期是按照 / 的方式;
日期的格式化;SpringMVC将页面提交的值需要转换为指定的类型;
在 WebMvcAutoConfiguration 类中可以看到装配的日期格式化器:
来到 WebMvcProperties 类中看到默认的日期格式:
如果想要使用 - 的方式来使用日期,如 2017-12-12---Date; 类型转换,格式化;
可以在配置文件中进行配置:
#配置springMVC的提交时的日期格式
spring.mvc.date-format=yyyy-MM-dd
4、员工修改
(1)复用添加页面
页面请求:
<td>
<a class="btn btn-sm btn-primary" th:href="@{/emp/}+${emp.id}">编辑</a>
<a class="btn btn-sm btn-danger">删除</a>
</td>
控制器方法:
//跳转到修改页面,先查询当前员工,在页面回显
@GetMapping(value = "/emp/{id}")
public String toAddPage(@PathVariable(value = "id") Integer id, Model model) {
Employee emp = employeeDao.get(id);
model.addAttribute("emp", emp);
Collection<Department> departments = departmentDao.getDepartments();
model.addAttribute("depts", departments);
//回到修改页面(修改添加二合一的页面)
return "emp/add";
}
(2)页面显示
<main role="main" class="col-md-9 ml-sm-auto col-lg-10 pt-3 px-4">
<!--需要区分是员工修改还是添加-->
<form th:action="@{/emp}" method="post">
<!--发送put请求修改员工数据-->
<!--
1、SpringMVC 中配置 HiddenHttpMethodFilter SpringBoot 自动配置
2、页面创建一个 post 表单
3、创建一个隐藏域, name="_method" ,值就是指定的请求方式
-->
<input type="hidden" name="_method" value="PUT" th:if="${emp != null}">
<input type="hidden" name="id" th:value="${emp != null} ? ${emp.id}">
<div class="form-group">
<label>LastName</label>
<input type="text" class="form-control" placeholder="zhangsan" name="lastName" th:value="${emp != null} ? ${emp.lastName}">
</div>
<div class="form-group">
<label>Email</label>
<input type="email" class="form-control" placeholder="zhangsan@atguigu.com" name="email" th:value="${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>
<select class="form-control" name="department.id">
<option th:each="dept : ${depts}"
th:text="${dept.departmentName}"
th:value="${dept.id}"
th:selected="${emp != null} ? ${dept.id == emp.department.id}"></option>
</select>
</div>
<div class="form-group">
<label>Birth</label>
<input type="text" class="form-control" placeholder="zhangsan" name="birth" th:value="${emp != null} ? ${#dates.format(emp.birth, 'yyyy-MM-dd')}">
</div>
<button type="submit" class="btn btn-primary" th:text="${emp!=null} ? '修改' : '添加'">添加</button>
</form>
</main>
(3)控制器方法
//员工修改,根据员工id进行修改
@PutMapping(value = "/emp")
public String updateEmp(Employee employee) {
System.out.println("修改的员工信息:" + employee);
employeeDao.save(employee);
return "redirect:/emps";
}
5、员工删除
(1)页面请求
<td>
<a class="btn btn-sm btn-primary" th:href="@{/emp/}+${emp.id}">编辑</a>
<button class="btn btn-sm btn-danger delBtn" th:attr="del_uri=@{/emp/}+${emp.id}">删除</button>
</td>
<form action="" method="post" id="del_form">
<input type="hidden" name="_method" value="delete">
</form>
<script>
$(".delBtn").click(function () {
if (confirm("确认删除吗?")) {
$("#del_form").attr("action", $(this).attr('del_uri')).submit();
}
return false;
});
</script>
(2)控制器方法
@DeleteMapping(value = "/emp/{id}")
public String delEmp(@PathVariable(value = "id") Integer id) {
System.out.println(id);
employeeDao.delete(id);
return "redirect:/emps";
}