would dispatch back to the current handler URL [/appversion] again. Check your ViewResolver setup!

解决错误：javax.servlet.ServletException: Circular view path [appversion]: would dispatch back to the current handler URL [/appversion] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)

报这个错误的主要原因：springMVC对于读取映射地址的混乱，主要是写的地址@RequestMapping("/xxx")和view里面的映射地址重复，解决这个bug的2个办法；

1是在方法体里面加入@ResponseBody（如果前后分离，建议使用这种）

2是在pom文件加入theme依赖