异常：
javax
.servlet
.ServletException
: Could not resolve view with name
'XXX' in servlet with name
'dispatcherServlet'
解决 1.是否是包没有导入
<dependency>
<groupId>org
.springframework
.boot
</groupId
>
<artifactId>spring
-boot
-starter
-thymeleaf
</artifactId
>
</dependency
>
2.ModelAndView是的导错误
import org
.springframework
.web
.servlet
.ModelAndView
