Thymeleaf 无法解析多模块 SpringBoot 项目中的模板

Question

>我在标题中描述了问题。

我创建了具有以下结构的多模块 SpringBoot 项目：

• 父模块(聚甲醛包装(
  • 前模块(罐装(
  • 业务模块(罐子包装(
  • 运行模块(战争包装(

当我直接通过 IntelliJ 运行应用程序时，它工作正常，但是当我通过 Maven 构建包并在控制台创建的 run-module.war 文件中运行时，它会抛出：

org.thymeleaf.exceptions.TemplateInputException: Error resolving template [pages/example-page], template might not exist or might not be accessible by any of the configured Template Resolvers
at org.thymeleaf.engine.TemplateManager.resolveTemplate(TemplateManager.java:869) ~[thymeleaf-3.0.11.RELEASE.jar!/:3.0.11.RELEASE]
at org.thymeleaf.engine.TemplateManager.parseAndProcess(TemplateManager.java:607) ~[thymeleaf-3.0.11.RELEASE.jar!/:3.0.11.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1098) ~[thymeleaf-3.0.11.RELEASE.jar!/:3.0.11.RELEASE]
at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1072) ~[thymeleaf-3.0.11.RELEASE.jar!/:3.0.11.RELEASE]
at org.thymeleaf.spring5.view.ThymeleafView.renderFragment(ThymeleafView.java:362) ~[thymeleaf-spring5-3.0.11.RELEASE.jar!/:3.0.11.RELEASE]
at org.thymeleaf.spring5.view.ThymeleafView.render(ThymeleafView.java:189) ~[thymeleaf-spring5-3.0.11.RELEASE.jar!/:3.0.11.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1373) ~[spring-webmvc-5.2.2.RELEASE.jar!/:5.2.2.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1118) ~[spring-webmvc-5.2.2.RELEASE.jar!/:5.2.2.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1057) ~[spring-webmvc-5.2.2.RELEASE.jar!/:5.2.2.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.2.RELEASE.jar!/:5.2.2.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.2.RELEASE.jar!/:5.2.2.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.2.RELEASE.jar!/:5.2.2.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.29.jar!/:9.0.29]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.2.RELEASE.jar!/:5.2.2.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.29.jar!/:9.0.29]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.29.jar!/:9.0.29]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.29.jar!/:9.0.29]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.29.jar!/:9.0.29]
...

我可以看到在run-module.war中有一个前模块.jar作为lib。

有人知道如何"告诉"百里香叶模板在哪里吗？

Answer 1

我通过以下配置解决了这个问题，创建一个类加载器模板解析器很重要：

@Configuration
public class ThymeleafConfiguration {
@Bean
public ClassLoaderTemplateResolver thymeleafTemplateResolver() {
ClassLoaderTemplateResolver resolver = new ClassLoaderTemplateResolver();
resolver.setPrefix("/templates/");
resolver.setSuffix(".html");
resolver.setCacheable(false);
resolver.setCharacterEncoding("UTF-8");
resolver.setTemplateMode(TemplateMode.HTML);
return resolver;
}
@Bean
public SpringTemplateEngine templateEngine() {
SpringTemplateEngine templateEngine = new SpringTemplateEngine();
templateEngine.setTemplateResolver(thymeleafTemplateResolver());
return templateEngine;
}
@Bean
public ThymeleafViewResolver thymeleafViewResolver() {
ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
viewResolver.setTemplateEngine(templateEngine());
viewResolver.setCharacterEncoding("UTF-8");
return viewResolver;
}
}

Answer 2

将协议"classpath"添加到没有jar文件名的前缀中

spring.thymeleaf.prefix=classpath:/templates/

Answer 3

对于寻找更多潜在问题的人：

对我们来说，问题是使用了不正确的类加载器来检索资源，该类加载器似乎看不到任何资源。这是使用异步CompletableFuture的副作用。

我们的解决方法是从创建 CompletableFuture 对象的线程中重用类加载器。

var classLoader = Thread.currentThread().getContextClassLoader();
CompletableFuture<Object> future = CompletableFuture.supplyAsync(() -> {
Thread.currentThread().setContextClassLoader(classLoader);
someAction();
});