You can not jump from the controller to the page

Use springboot when I want to jump from one page hel.html a method of controller. Is so ah,

    @RequestMapping("/hello")
    public String hel() {
        return "hel";
    }

Had previously been written will be able to jump.

Later, there can be used to guide thymeleaf package, but do not know which is dependent on the specific package.