Springboot整合thymeleaf时候常见问题

今天学习SpringBoot整合thymeleaf时候又犯了一系列问题

我先上我初始的代码

前台代码success.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>auccess</title>
</head>
<body>
<h1 th:text="${msg}">hh</h1>
<h2 href="www.aguigu.com" th:href="${baidu}">baidu1</h2>
<h2 href="www.aguigu.com" th:href="@{/baidu}">baidu2</h2>
</body>
</html>

controller控制层代码viewresolverController

@Controller
public class viewresolverController {
    @RequestMapping("/aguigu")
    public String viewtest1(Model model){
        model.addAttribute("msg","hi");
        model.addAttribute("baidu","www.baidu.com");
        System.out.println("sdsd");
        return "success";
    }
}

项目结构