为什么 html 页面没有显示在 thymeleaf 中? [英] Why the html page doesn't get showed in thymeleaf?
问题描述
我正在使用 spring boot 和 thymeleaf 视图引擎.
I'm using spring boot and the thymeleaf view engine.
问题是控制器没有显示正确的 html 页面并且总是显示 Whitelabel Error Page.
The problem is the controller doesn't show the proper html page and always shows the Whitelabel Error Page.
控制器:
package com.example.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class GifController {
@RequestMapping("/greeting")
public String sayhello() {
return "greets";
}
}
资源/模板路径中的greets.html文件:
The greets.html file in resources/templates path:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"/>
<title>Insert title here</title>
</head>
<body>
Hello!
</body>
</html>
还有:
@EnableAutoConfiguration
@SpringBootApplication
@ComponentScan
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
还有 pom.xml :
And the pom.xml :
<?xml version="1.0" encoding="UTF-8"?>
<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>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</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-web</artifactId>
</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>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
问题出在哪里?当我浏览到 localhost:8080/greeting 时，它会显示 whitelabel Error page 而不是 greets.html.
Where's the problem? When I browse to localhost:8080/greeting it shows whitelabel Error page instead of the greets.html.
推荐答案
您的 Controller 和 SpringBoot 应用程序看起来不错.尝试清理和构建您的项目.当您运行 DemoApplication 时，您应该在控制台中看到如下所示
Your Controller and SpringBoot application looks ok. Try to clean and build your project. When you will run DemoApplication you should see like below in console
Mapped "{[/greeting]}" onto public java.lang.String com.example.controller.GifController.sayhello()
在你的DemoApplication中你只需要@SpringBootApplication，因为这个注解相当于使用@Configuration、@EnableAutoConfiguration和@ComponentScan
And in your DemoApplication you only need @SpringBootApplication as this annotation is equivalent to using @Configuration, @EnableAutoConfiguration and @ComponentScan
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