Question

我正在使用spring-boot-starter-thymeleaf使用spring boot 2.0.1.RELEASE。我有两个版本的PC和手机版本。

这是我的项目结构的简单版本 project structure

我希望该网站能够自动检测PC浏览器和手机浏览器，以便根据浏览器的类型将相同的请求URL映射到不同的页面

html文件非常简单，如下所示。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<p>This is from PC web browser</p>
</body>
</html>

这是我的控制器的代码。

@Controller
public class MyController {

    @RequestMapping("/")
    public String mainDefault(){
        return "home";
    }

    @RequestMapping("/home")
    public String main(){
        return "home";
    }
}

要检测设备，我编写了以下配置类

@Configuration
public class Config implements WebMvcConfigurer {

    @Autowired
    private ApplicationContext applicationContext;

    @Bean
    public LiteDeviceDelegatingViewResolver liteDeviceDelegatingViewResolver() {
        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
        viewResolver.setTemplateEngine(templateEngine());
        viewResolver.setCharacterEncoding("UTF-8");
        LiteDeviceDelegatingViewResolver resolver = new LiteDeviceDelegatingViewResolver(viewResolver);
        resolver.setNormalPrefix("web/");
        resolver.setMobilePrefix("mobile/");
        resolver.setTabletPrefix("web/");
        resolver.setOrder(1);
        resolver.setEnableFallback(true);
        return resolver;
    }

    @Bean
    public SpringTemplateEngine templateEngine() {
        SpringTemplateEngine templateEngine = new SpringTemplateEngine();
        templateEngine.addDialect(new LayoutDialect());
        templateEngine.setTemplateResolver(templateResolver());
        templateEngine.setEnableSpringELCompiler(true);
        return templateEngine;
    }

    @Bean
    public SpringResourceTemplateResolver templateResolver() {
        SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
        templateResolver.setApplicationContext(this.applicationContext);
        templateResolver.setTemplateMode(TemplateMode.HTML);
        templateResolver.setCharacterEncoding("UTF-8");
        templateResolver.setPrefix("/templates/");
        templateResolver.setSuffix(".html");
        templateResolver.setTemplateMode(".HTML5");
        templateResolver.setCacheable(false);
        return templateResolver;
    }

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        DeviceResolverHandlerInterceptor deviceResolverHandlerInterceptor = new DeviceResolverHandlerInterceptor();
        SitePreferenceHandlerInterceptor sitePreferenceHandlerInterceptor = new SitePreferenceHandlerInterceptor();
        LocaleChangeInterceptor localeChangeInterceptor = new LocaleChangeInterceptor();
        localeChangeInterceptor.setParamName("lang");
        registry.addInterceptor(localeChangeInterceptor);
        registry.addInterceptor(deviceResolverHandlerInterceptor);
        registry.addInterceptor(sitePreferenceHandlerInterceptor);
        WebMvcConfigurer.super.addInterceptors(registry);
    }
}

然后当我尝试运行应用程序时。我总是得到以下错误。它似乎可以映射到正确的资源[/templates/web/home.html]。但它总是说无法打开ServletContext资源[/templates/web/home.html]

如果我从移动浏览器访问，则会映射到[/templates/mobile/home.html]，这也是正确的。

任何人都可以帮助我吗？提前谢谢。

2018-04-19 17:18:57.040 ERROR 17732 --- [nio-9020-exec-9] org.thymeleaf.TemplateEngine             : [THYMELEAF][http-nio-9020-exec-9] Exception processing template "web/home": An error happened during template parsing (template: "ServletContext resource [/templates/web/home.html]")

org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "ServletContext resource [/templates/web/home.html]")
    at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(AbstractMarkupTemplateParser.java:235) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE]
    at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parseStandalone(AbstractMarkupTemplateParser.java:100) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE]
    at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:666) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE]

.........

Caused by: java.io.FileNotFoundException: Could not open ServletContext resource [/templates/web/home.html]
    at org.springframework.web.context.support.ServletContextResource.getInputStream(ServletContextResource.java:159) ~[spring-web-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.thymeleaf.spring5.templateresource.SpringResourceTemplateResource.reader(SpringResourceTemplateResource.java:103) ~[thymeleaf-spring5-3.0.9.RELEASE.jar:3.0.9.RELEASE]
    at org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse(AbstractMarkupTemplateParser.java:223) ~[thymeleaf-3.0.9.RELEASE.jar:3.0.9.RELEASE]
    ... 52 common frames omitted

2018-04-19 17:18:57.047 DEBUG 17732 --- [nio-9020-exec-9] o.s.web.servlet.DispatcherServlet        : Error rendering view [org.thymeleaf.spring5.view.ThymeleafView@139a953a] in DispatcherServlet with name 'dispatcherServlet'

org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "ServletContext resource [/templates/web/home.html]")

Answer 1

您正在尝试配置已经configured for you的内容。

确保您拥有spring-boot-starter-thymeleaf并且您的依赖项列表中包含spring-mobile-autoconfguration。

注意：我假设您正在使用快照构建，以便与Spring和Spring Boot版本兼容。

删除Config班级

将以下内容添加到application.properties

spring.mobile.devicedelegatingviewresolver.normalPrefix=web/
spring.mobile.devicedelegatingviewresolver.tabletPrefix=web/
spring.thymeleaf

重新启动您的应用

spring boot thymeleaf不能与LiteDeviceDelegatingViewResolver一起使用

1 个答案: