尝试从控制器返回html页面时未找到获取资源

Question

我无法在SpringBoot中呈现html页面。这是密码...

@RestController
    public class ProductController {
        @Autowired
        ProductService service;
    
        @InitBinder
        public void initBinder(WebDataBinder webDataBinder) {
            SimpleDateFormat dateFormat = new SimpleDateFormat("dd-MM-yyyy");
            dateFormat.setLenient(false);
            webDataBinder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true));
        }
        
        @RequestMapping(value = { "/", "/home" })
        public ModelAndView home() {
            System.out.println("sdasasas");
            return new ModelAndView("home");
        }
    
    

但当我点击http://localhost:8080/home时，它会显示以下日志

-8080-exec-4] o.s.w.s.v.ContentNegotiatingViewResolver : Selected 'text/html' given [text/html, application/xhtml+xml, image/webp, image/apng, application/signed-exchange;v=b3, application/xml;q=0.9,*/*;q=0.8]
2019-07-31 16:05:25.354 DEBUG 14850 --- [nio-8080-exec-4] o.s.w.servlet.view.InternalResourceView  : View name 'home', model {}
2019-07-31 16:05:25.354 DEBUG 14850 --- [nio-8080-exec-4] o.s.w.servlet.view.InternalResourceView  : Forwarding to [/WEB-INF/html/home.html]
2019-07-31 16:05:25.354 DEBUG 14850 --- [nio-8080-exec-4] o.s.web.servlet.DispatcherServlet        : "FORWARD" dispatch for GET "/WEB-INF/html/home.html", parameters={}
2019-07-31 16:05:25.356 DEBUG 14850 --- [nio-8080-exec-4] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped to ResourceHttpRequestHandler ["classpath:/META-INF/resources/", "classpath:/resources/", "classpath:/static/", "classpath:/public/","/"]
2019-07-31 16:05:25.356  WARN 14850 --- [nio-8080-exec-4] o.s.w.s.r.ResourceHttpRequestHandler     : Path with "WEB-INF" or "META-INF": [WEB-INF/html/home.html]
2019-07-31 16:05:25.356 DEBUG 14850 --- [nio-8080-exec-4] o.s.w.s.r.ResourceHttpRequestHandler     : Resource not found
2019-07-31 16:05:25.357 DEBUG 14850 --- [nio-8080-exec-4] o.s.web.servlet.DispatcherServlet        : Exiting from "FORWARD" dispatch, status 404
2019-07-31 16:05:25.357 DEBUG 14850 --- [nio-8080-exec-4] o.j.s.OpenEntityManagerInViewInterceptor : Closing JPA EntityManager in OpenEntityManagerInViewInterceptor
2019-07-31 16:05:25.357 DEBUG 14850 --- [nio-8080-exec-4] o.s.web.servlet.DispatcherServlet        : Completed 404 NOT_FOUND
2019-07-31 16:05:25.357 DEBUG 14850 --- [nio-8080-exec-4] o.s.web.servlet.DispatcherServlet        : "ERROR" dispatch for GET "/error", parameters={}

Answer 1

对于必须返回视图的基于MVC的应用程序，请避免使用@restcontroller。它主要用于REST API。而@controller可以返回视图

有关@RestController的更多信息：

• 此批注是@controller的专用版本，它自动添加@controller和@responsebody批注。因此我们不必将@responsebody添加到映射方法中。这意味着@responsebody默认为活动状态。
• 如果使用@RestController则无法返回视图（通过在spring/spring-boot中使用ViewResolver)
• @restcontroller还将响应自动转换为JSON/XML,因为@responsebody将返回的对象转换为主体中可能存在的东西,例如。JSON或XML

控制器vs RestController

@RestController
    public class ProductController {
        @Autowired
        ProductService service;

        @RequestMapping(value = { "/", "/home" })
        public @ResponseBody ModelAndView home() {
            System.out.println("sdasasas");
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.setViewName("home");
            return modelAndView;
        }
}

无需指定spring.mvc.view.prefix=/web-inf/html/spring.mvc.view.suffix=.html

此外，请确保您没有任何带有@enablewebmvc注释的附加类。这可能会破坏spring-boot自动配置。