我出现这个问题，找了好多，都没解决，最后发现配置错了，pom.xml中的依赖引入错了，html出现不了，应该引入的是
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-thymeleaf --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-thymeleaf</artifactId> <version>2.1.2.RELEASE</version> </dependency>
![[Err] ERROR: invalid input syntax for integer: "1.0"](https://ucc.alicdn.com/pic/developer-ecology/812b099b525847e99ad18b7b1f3312bb.png?x-oss-process=image/resize,h_160,m_lfit)