事情来源：我自己从头写springboot，到了控制类发现接不上静态资源！
找了很久，最后发现，只需要换依赖版本，让spring-boot-starter-thymeleaf和spring-boot-dependencies对应即可！
<properties>
<spring-boot>2.6.1</spring-boot>
</properties>
<!--springboot使用spring data jpa 为止所添加的依赖-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot}</version>
<type>pom</type>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-thymeleaf -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
<version>${spring-boot}</version>
</dependency>
结果就可以了：
