报错：This may be the result of an unspecified view, due to default view name generation

今天调试数据同步（从oracle数据库实时同步到mysql）时候，报了个错，能出结果，但是报错，错误如下：

javax.servlet.ServletException: Circular view path [tb]: would dispatch back to the current handler URL [/tb] again.

 Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)

最终是因为@Controller没有写成@RestController的原因。