网上找了一圈都没有解决自己的问题
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Wed Nov 21 16:04:36 CST 2018
There was an unexpected error (type=Not Found, status=404).
No message available
上面这个肯的是url 地址连接错误
然后
spring boot 与jsp结合后运行起来,可以进入controller层但是不能返回正确的视图
org.thymeleaf.exceptions.TemplateInputException: Error resolving template [helloworld], template might not exist or might not be accessible by any of the configured Template Resolvers
这个是jar导入错误,我是因为没有导入这个jar
<!-- Tomcat Embed -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
我拉下来一个spring boot结合jsp的demo 而别人的是可以正常跑起来的,我比较了一下pom文件才发现的
https://howtodoinjava.com/spring-boot/spring-boot-jsp-view-example/
就这个,代码直接拉下来就可以跑的