spring-mvc - Thymeleaf 模板解析器前缀与 Gradle

Question

我尝试在 AWS Elastic Beanstalk 中部署使用 Gradle 构建的 Spring Boot 应用程序，但我不断收到此错误:

2017-07-05 13:47:17.913 ERROR 2804 --- [nio-5000-exec-7] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.thymeleaf.exceptions.TemplateInputException: An error happened during template parsing (template: "class path resource [templates//articulos/index.html]")] with root cause

java.io.FileNotFoundException: class path resource [templates//articulos/index.html] cannot be opened because it does not exist
    at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:172) ~[spring-core-4.3.7.RELEASE.jar!/:4.3.7.RELEASE]
    at org.thymeleaf.spring4.templateresource.SpringResourceTemplateResource.reader(SpringResourceTemplateResource.java:103) ~[thymeleaf-spring4-3.0.3.RELEASE.jar!/:3.0.3.RELEASE]
...

这是我的配置类:

@Bean
public ViewResolver viewResolver() {
    ThymeleafViewResolver resolver = new ThymeleafViewResolver();
    resolver.setTemplateEngine(templateEngine());
    resolver.setCharacterEncoding("UTF-8");

    return resolver;
}

private TemplateEngine templateEngine() {
    SpringTemplateEngine engine = new SpringTemplateEngine();
    engine.addDialect(new Java8TimeDialect());
    engine.addTemplateResolver(templateResolver());
    engine.getConfiguration();

    return engine;
}

@Bean
public SpringResourceTemplateResolver templateResolver() {
    SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
    templateResolver.setCacheable(false);
    templateResolver.setPrefix("classpath:/templates/");
    templateResolver.setSuffix(".html");
    return templateResolver;
}

@Bean
public UrlTemplateResolver urlTemplateResolver() {
    return new UrlTemplateResolver();
}

生成的文件夹结构如下:

我尝试将 TemplateResolver 的前缀更改为:

• /模板
• 模板
• 模板/
• /模板/
• 类路径:模板/
• 类路径:/模板/

我的应用程序打包在 WAR 文件中，具有以下 Gradle 配置:

buildscript {
    ext {
        springBootVersion = '1.5.2.RELEASE'
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

apply plugin: 'java'
apply plugin: 'eclipse-wtp'
apply plugin: 'org.springframework.boot'
apply plugin: 'war'

version = '0.0.1-SNAPSHOT'
sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

configurations {
    providedRuntime
}

dependencies {
    compile('org.springframework.boot:spring-boot-starter-data-jpa')
    compile('org.flywaydb:flyway-core')
    compile("org.springframework.boot:spring-boot-starter-thymeleaf")
    compile ("org.thymeleaf.extras:thymeleaf-extras-springsecurity4:3.0.0.RELEASE")
    compile ("org.thymeleaf.extras:thymeleaf-extras-java8time:3.0.0.RELEASE")
    compile ("io.github.jpenren:thymeleaf-spring-data-dialect:3.1.1")
    compile('org.springframework.boot:spring-boot-starter-web')
    runtime('org.springframework.boot:spring-boot-devtools')
    runtime('mysql:mysql-connector-java')
    providedRuntime('org.springframework.boot:spring-boot-starter-tomcat')
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

ext["thymeleaf.version"] = "3.0.3.RELEASE"

这是解压的 WAR 文件的树输出，文件夹“templates”似乎位于类路径中:

.
|-- META-INF
|-- WEB-INF
|   |-- classes
|   |   |-- ar
|   |   |   `-- com
|   |   |       `-- reweb
|   |   |           `-- data
|   |   |               `-- repository
|   |   |-- db
|   |   |   `-- migration
|   |   |-- static
|   |   |   |-- bootstrap
|   |   |   |   |-- css
|   |   |   |   |-- fonts
|   |   |   |   `-- js
|   |   |   |-- css
|   |   |   |-- img
|   |   |   |-- jquery
|   |   |   |   `-- ui
|   |   |   |       |-- css
|   |   |   |       `-- js
|   |   |   `-- js
|   |   |       `-- articulos
|   |   `-- templates
|   |       |-- articulos
|   |       |   |-- aplicaciones

没有运气，有什么想法吗？谢谢

Answer 1

需要注意的一件事是，如果 Thymeleaf 找不到模板，则会抛出不同措辞的异常:

org.thymeleaf.exceptions.TemplateInputException: Error resolving template "articulos/index", template might not exist or might not be accessible by any of the configured Template Resolvers

FWIW，您的代码在我的机器上运行良好，只需稍作修改(将 TemplateEngine 转换为 SpringTemplateEngine)

这让我认为你的问题出在模板本身之内 - 也许你正在动态地包含一个片段(例如通过 th:replace 或 th:include)链接回“/articulos/index.html”，但无法正确解析。

我会尝试用最简单的版本替换index.html，如下所示:

<!DOCTYPE html>
<html>
<body>
<div>
    Hello world!
</div>
</body>
</html>

看看它是否被加载。

如果有效，请尝试仔细检查模板的语法，尤其是双斜杠 (//)，因为这看起来确实可疑。