springboot项目异常would dispatch back to the current handler URL [/index] again

 

 

有可能是thymeleaf依赖导入异常，或者没导入thymeleaf依赖

可以尝试到pom.xml中导入thymeleaf依赖

 

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>

如果改完发现还是报500错误，可以去application.properties文件中将thymeleaf的缓存关闭

spring.thymeleaf.cache=false