控制台：would dispatch back to the current handler URL [/findAllNews] again. Check your ViewResolver setup!

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

错误原因：@Controller中的视图解析器不能解析json格式内容，导致视图解析出错

解决方法：将@Controller 改成@RestController