Thymeleaf 3 Spring 5 映射加载字符串而不是 HTML

问题描述

我正在尝试将 Spring 5 和 Thymeleaf 3 配置在一起.我正在 Eclipse 上工作，我使用全新安装"构建并使用springboot:run"运行应用程序.我已经设置了一个控制器和几个模板，但 Thymeleaf 似乎找不到它们，它在浏览器中显示模板名称(例如panda")而不是加载模板本身(panda.html").

I'm trying to configure Spring 5 and Thymeleaf 3 together. I'm working on Eclipse, I build with 'clean install' and run the app with 'springboot:run'.I've setup a controller and a couple of templates but it seems that Thymeleaf cannot find them, in the browser it shows the template name (es. 'panda') instead of loading the template itself ('panda.html').

这是文件夹结构:

在我的控制器中，我有以下映射

In my controller I have the following mapping

@RestController
@Controller
public class MyController {

    @Autowired
    UtentiRepository utentiRepository;

    @GetMapping("/gab")
    public String panda(Model model) {

        return "panda";
    }
}

这是模板解析器的代码

@Configuration
@EnableWebMvc
@ComponentScan("it.uniroma3.spring")
public class MvcWebConfig implements WebMvcConfigurer {

    @Autowired
    private ApplicationContext applicationContext;

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

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

    @Override
    public void configureViewResolvers(ViewResolverRegistry registry) {
        ThymeleafViewResolver resolver = new ThymeleafViewResolver();
        resolver.setTemplateEngine(templateEngine());
        registry.viewResolver(resolver);
    }
}

这是 pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

  <modelVersion>4.0.0</modelVersion>
  <groupId>it.uniroma3.progettosiw</groupId>
  <artifactId>progetto-siw</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.2.RELEASE</version>
    <relativePath/>
  </parent>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>javax.xml.bind</groupId>
      <artifactId>jaxb-api</artifactId>
      <version>2.2.11</version>
    </dependency>
    <dependency>
      <groupId>com.sun.xml.bind</groupId>
      <artifactId>jaxb-core</artifactId>
      <version>2.2.11</version>
    </dependency>
    <dependency>
      <groupId>com.sun.xml.bind</groupId>
      <artifactId>jaxb-impl</artifactId>
      <version>2.2.11</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-devtools</artifactId>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
  </dependencies>

  <build>
    <sourceDirectory>src/main/java</sourceDirectory>
    <plugins>
      <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
      </plugin>
      <plugin>
        <groupId>org.apache.tomcat.maven</groupId>
        <artifactId>tomcat7-maven-plugin</artifactId>
        <version>2.2</version>
        <configuration>
          <path>/</path>
        </configuration>
      </plugin>
    </plugins>
  </build>

</project>

推荐答案

@RestController 隐式地将 @ResponseBody 放在您的方法上，这在您的情况下会导致您返回 String 直接传递到 HttpResponse 对象中(而不是被解释为视图名称).

@RestController implicitly puts @ResponseBody on your methods which in your case causes your returned String to be passed directly into the HttpResponse object (instead of being interpreted as a view name).

所以只需删除 MyController 类中的 @RestController.

So just remove @RestController in MyController class.

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