springboot 整合 web

r囧r小猫 2022-06-01 00:53 206阅读 0赞

@MapperScan(basePackages = "com.example")
    @SpringBootApplication(scanBasePackages = "com.example")
    public class Application { 
    
        public static void main(String[] args) {
            SpringApplication.run(Application.class, args);
        }
    
        @Component
        public static class CustomSevletContainer implements EmbeddedServletContainerCustomizer { 
    
            @Override
            public void customize(ConfigurableEmbeddedServletContainer container) {
                /* html放在src/main/resources/static下 */
                container.addErrorPages(new ErrorPage(HttpStatus.NOT_FOUND, "/404.html"));
                container.addErrorPages(new ErrorPage(HttpStatus.INTERNAL_SERVER_ERROR, "/500.html"));
                /* 如果配置文件中也配置了端口号，则已此处的为准 */
                container.setPort(8083);
                container.setSessionTimeout(1, TimeUnit.MINUTES);
            }
        }
    }

拦截器

public class MyInterceptor implements HandlerInterceptor { 
        private static final Logger LOGGER = LoggerFactory.getLogger(MyInterceptor.class);
        private static final ThreadLocal<Long> THREAD_LOCAL = new ThreadLocal<>();
    
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                ModelAndView modelAndView) throws Exception {
            long startTime = THREAD_LOCAL.get();
            long endTime = System.currentTimeMillis();
            if (modelAndView == null) {
                LOGGER.info("url: {}; 本次请求处理时间： {}", request.getRequestURI(), new Long(endTime - startTime) + "ms");
            } else {
                LOGGER.info("viewName: {}; 本次请求处理时间： {}", modelAndView.getViewName(), new Long(endTime - startTime) + "ms");
            }
        }
    
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
                throws Exception {
            long startTime = System.currentTimeMillis();
            THREAD_LOCAL.set(startTime);
            return true;
        }
    
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
                throws Exception {
            LOGGER.info("URI: {} 最大内存: {}m 已分配内存: {}m 已分配内存中的剩余空间: {}m 最大可用内存: {}m", request.getRequestURI(),
                    Runtime.getRuntime().maxMemory() / 1024 / 1024, Runtime.getRuntime().totalMemory() / 1024 / 1024,
                    Runtime.getRuntime().freeMemory() / 1024 / 1024, (Runtime.getRuntime().maxMemory()
                            - Runtime.getRuntime().totalMemory() + Runtime.getRuntime().freeMemory()) / 1024 / 1024);
        }
    }

@Configuration
    public class MyWebAppConfigurer extends WebMvcConfigurerAdapter { 
    
        @Override
        public void addInterceptors(InterceptorRegistry registry) {
            registry.addInterceptor(myInterceptor()).addPathPatterns("/**");
            super.addInterceptors(registry);
        }
    
        @Bean
        public MyInterceptor myInterceptor() {
            return new MyInterceptor();
        }
    
        @Override
        public void addViewControllers(ViewControllerRegistry registry) {
            //都是html，放在src/main/resources/templates下
            registry.addViewController("/").setViewName("/index");
            registry.addViewController("/error").setViewName("/error");
        }
    }

得到异常信息，用于展示在页面上

@ControllerAdvice
    public class ExceptionHandlerAdvice {
    
        @ExceptionHandler(value = Exception.class)
        public ModelAndView exception(Exception exception, WebRequest request) {
            ModelAndView modelAndView = new ModelAndView("error");
            modelAndView.addObject("errorMessage", exception.getMessage());
            return modelAndView;
        }
    }

**springboot不推荐使用jsp，推荐Thymeleaf模版**

error页面

@Controller
    @RequestMapping("/mvc")
    public class HelloMVC { 
    
        private static final Logger LOGGER = LoggerFactory.getLogger(HelloMVC.class);
    
        @RequestMapping("person")
        public String person(Model model) {
            Person single = new Person("qinwei", 25);
            List<Person> people = new ArrayList<>();
            people.add(new Person("a", 1));
            people.add(new Person("b", 2));
            people.add(new Person("c", 3));
            people.add(new Person("d", 4));
            model.addAttribute("singlePerson", single);
            model.addAttribute("people", people);
            return "html/person";
        }
    }

person.html

<html xmlns:th="http://thymeleaf.org">
    <head>
    <meta content="text/html;charset=UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width,initial-scale=1" />
    <link th:href="@{/bootstrap/css/bootstrap.min.css}" rel="stylesheet" />
    <link th:href="@{/bootstrap/css/bootstrap-theme.min.css}" rel="stylesheet" />
    <script type="text/javascript" th:src="@{/jquery-1.9.1.min.js}"></script>
    <script type="text/javascript" th:src="@{/bootstrap/js/bootstrap.min.js}"></script>
    <title>Person</title>
    </head>
    <body>
        <div class="panel panel-primary">
            <div class="panel-heading">
                <h3 class="panel-title" align="center">VISIT MODEL</h3>
            </div>
            <div class="panel-body">
                <h4 th:text="${singlePerson.name}" align="center"></h4>
            </div>
        </div>
        <div th:if="${not #lists.isEmpty(people)}">
            <div class="panel-primary">
                <div class="panel-heading">
                    <span class="panel-title">LIST</span>
                </div>
                <div class="panel-body">
                    <ul class="list-group">
                        <li class="list-group-item" th:each="person:${people}"><span th:text="${person.name}"></span> <span th:text="${person.age}"></span>
                            <button class="btn" th:onclick="'getName(\''+${person.name}+'\');'">obtain
                                name</button></li>
                    </ul>
                </div>
            </div>
        </div>
    
        <script th:inline="javascript"> //在javascript中使用变量需要放在 /*[[]]*/中，否则获取不到 var single = /*[[${singlePerson}]]*/; alert(single.name + '/' + single.age); function getName(name) { alert(name); } </script>
    </body>
    </html>

![这里写图片描述][SouthEast]

[SouthEast]: /images/20220601/e292ff592c2f4242be255a87b544f882.png