需求：訪問 http://localhost:8080/templates/hello 的時候，訪問到 hello.html

package com.guet;


import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;


@Controller
@RequestMapping("/templates")
public class TemplatesController {
    @RequestMapping("/hello")
    public String hello(){
        return "hello";
    }

}

下面是瀏覽器報錯：

Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.

Sun Apr 29 18:49:49 CST 2018
There was an unexpected error (type=Internal Server Error, status=500).
Circular view path [hello]: would dispatch back to the current handler URL [/templates/hello] again. Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)

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