1、引入thymeleaf、静态资源等依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>jquery</artifactId>
<version>3.3.1</version>
</dependency>
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>4.1.3</version>
</dependency>
<!-- 模板引擎 Thymeleaf 依赖 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
2、欢迎页面及静态资源配置解析：WebMvcAutoConfiguration
public void addResourceHandlers(ResourceHandlerRegistry registry) { if (!this.resourceProperties.isAddMappings()) { logger.debug("Default resource handling disabled"); return; } Integer cachePeriod = this.resourceProperties.getCachePeriod(); if (!registry.hasMappingForPattern("/webjars/**")) { customizeResourceHandlerRegistration(registry .addResourceHandler("/webjars/**") .addResourceLocations("classpath:/META-INF/resources/webjars/") .setCachePeriod(cachePeriod)); } String staticPathPattern = this.mvcProperties.getStaticPathPattern();
//静态资源文件夹映射 if (!registry.hasMappingForPattern(staticPathPattern)) { customizeResourceHandlerRegistration( registry.addResourceHandler(staticPathPattern) .addResourceLocations( this.resourceProperties.getStaticLocations()) .setCachePeriod(cachePeriod)); } }
//配置欢迎页 @Bean public WelcomePageHandlerMapping welcomePageHandlerMapping( ResourceProperties resourceProperties) { return new WelcomePageHandlerMapping(resourceProperties.getWelcomePage(), this.mvcProperties.getStaticPathPattern()); }
public Resource getWelcomePage() { for (String location : getStaticWelcomePageLocations()) { Resource resource = this.resourceLoader.getResource(location); try { if (resource.exists()) { resource.getURL(); return resource; } } catch (Exception ex) { // Ignore } } return null; } private String[] getStaticWelcomePageLocations() { String[] result = new String[this.staticLocations.length]; for (int i = 0; i < result.length; i++) { String location = this.staticLocations[i]; if (!location.endsWith("/")) { location = location + "/"; } result[i] = location + "index.html"; }
3、注册templates主页面访问路径/、/index
@Configuration public class MyConfig { @Bean public WebMvcConfigurerAdapter webMvcConfigurerAdapter(){ WebMvcConfigurerAdapter webMvcConfigurerAdapter =new WebMvcConfigurerAdapter(){ public void addViewControllers(ViewControllerRegistry registry) { // TODO Auto-generated method stub registry.addViewController( "/").setViewName("index"); registry.addViewController( "/index.html").setViewName("index"); } return webMvcConfigurerAdapter; }
4、index.html
<!doctype html> <html lang="en" xmlns:th="http://www.thymeleaf.org"> <head> <meta 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="Mark Otto, Jacob Thornton, and Bootstrap contributors"> <meta name="generator" content="Jekyll v3.8.5"> <title>Signin Template · Bootstrap</title> <!-- Bootstrap core CSS --> <link href="/docs/4.2/dist/css/bootstrap.min.css" rel="stylesheet" th:href="@{/webjars/bootstrap/4.1.3/css/bootstrap.min.css}" crossorigin="anonymous"> <style> .bd-placeholder-img { font-size: 1.125rem; text-anchor: middle; } @media (min- 768px) { .bd-placeholder-img-lg { font-size: 3.5rem; } } </style> <!-- Custom styles for this template --> <link th:href="@{assert/css/signin.css}" rel="stylesheet"> </head> <body class="text-center"> <form class="form-signin" th:action="@{/toLogin}"> <img class="mb-4" th:src="@{/assert/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> <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" name="username" class="form-control" th:placeholder="#{login.username}" required autofocus> <label for="inputPassword" class="sr-only" th:text="#{login.password}">Password</label> <input type="password" name="password" id="inputPassword" 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" th:text="#{login.btn}">Sign in</button> <p class="mt-5 mb-3 text-muted">© 2017-2018</p> </form> </body> </html>
5、LoginController
@Controller public class LoginController { @RequestMapping(value = "/toLogin") public String toLogin(@PathParam(value = "username") String username, @PathParam(value = "password") String password, Map<String, Object> map, HttpSession session) { if(!StringUtils.isEmpty(username)&&"123456".equals(password)){ session.setAttribute("loginUser", username); return "redirect:/main"; }else { map.put("msg", "用户或密码不正确"); return "index"; } }
6、用拦截器LoginInterceptor简单实现未登录返回主页面
public class LoginInterceptor implements HandlerInterceptor{ @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { HttpSession session = request.getSession(); Object user = session.getAttribute("loginUser"); if(user == null){ request.setAttribute("msg", "请先登录"); request.getRequestDispatcher("/").forward(request, response); return false; } return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { // TODO Auto-generated method stub } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { // TODO Auto-generated method stub } }
注册拦截器
@Configuration public class MyConfig { @Bean public WebMvcConfigurerAdapter webMvcConfigurerAdapter(){ WebMvcConfigurerAdapter webMvcConfigurerAdapter =new WebMvcConfigurerAdapter(){ ...... @Override public void addInterceptors(InterceptorRegistry registry) { // TODO Auto-generated method stub registry.addInterceptor(new LoginInterceptor()).excludePathPatterns("/","/index.html","/toLogin"); } }; return webMvcConfigurerAdapter; }
实现效果：
