无法运行具有Thymeleaf支持的Spring Boot WebMVC

我进行了很多搜索，但没有找到问题的答案，因此，我在此处发布问题。请查看并向我提出我误解的解决方案。

我已经使用Spring Tool Suite（STS）创建了带有百里香支持的spring boot web mvc项目。当我运行它时，请给我“白色标签错误页面”页面。这意味着找不到映射。

工作量：

WebConfig.java

package com.springthymeleaf.config;

import org.springframework.boot.context.embedded.ServletRegistrationBean;
import org.springframework.context.MessageSource;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.support.ReloadableResourceBundleMessageSource;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.thymeleaf.spring4.SpringTemplateEngine;
import org.thymeleaf.spring4.view.ThymeleafViewResolver;
import org.thymeleaf.templateresolver.ServletContextTemplateResolver;

@Configuration
@ComponentScan("com.springthymeleaf")
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter  {

    @Bean
    ServletRegistrationBean servletRegistration(){
        ServletRegistrationBean registrationBean = new ServletRegistrationBean();
        registrationBean.addUrlMappings("/console/*");
        return registrationBean;
    }

    //start Thymeleaf specific configuration
    @Bean(name ="templateResolver") 
    public ServletContextTemplateResolver getTemplateResolver() {
        ServletContextTemplateResolver templateResolver = new ServletContextTemplateResolver();
//      templateResolver.setPrefix("/templates/");
        templateResolver.setSuffix(".html");
        templateResolver.setTemplateMode("XHTML");
    return templateResolver;
    }
    @Bean(name ="templateEngine")       
    public SpringTemplateEngine getTemplateEngine() {
        SpringTemplateEngine templateEngine = new SpringTemplateEngine();
        templateEngine.setTemplateResolver(getTemplateResolver());
    return templateEngine;
    }
    @Bean(name="viewResolver")
    public ThymeleafViewResolver getViewResolver(){
        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver(); 
        viewResolver.setTemplateEngine(getTemplateEngine());
    return viewResolver;
    }
    //end Thymeleaf specific configuration
    @Bean(name ="messageSource")
    public MessageSource getMessageSource() {
        ReloadableResourceBundleMessageSource messageSource = new ReloadableResourceBundleMessageSource();
        messageSource.setBasename("/WEB-INF/i18/thymeleafResource");
        messageSource.setDefaultEncoding("UTF-8");
        return messageSource;
    }
}

SecurityConfiguration.java

package com.springthymeleaf.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

@Configuration
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity httpSecurity) throws Exception {
        httpSecurity.authorizeRequests().antMatchers("/").permitAll();
    }
}

ServletInitializer.java

package com.springthymeleaf;

import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;

public class ServletInitializer extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(SpringThymeLeafApplication.class);
    }

}

SpringThymeLeafApplication.java

package com.springthymeleaf;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class SpringThymeLeafApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringThymeLeafApplication.class, args);
    }
}

IndexController.java

package com.springthymeleaf.controllers;


import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class IndexController {

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

我已经index.html在resources / templates文件夹中创建了文件。仍然我得到那个错误。我在网上进行了很多搜索，但没有得到任何线索。请有人帮我。