thymeleaf springboot

　　

 

 

 

 

 

 

 

 

 

上面这个会造成如上错误

 

引入如下依赖

 

 

 

 

TestController.java

package com.example.demo.controller;

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

@Controller
public class TestController {
    @RequestMapping("/test")
    public String test(Model model){
        model.addAttribute("msg", "hello, springboot");
        return "test";
    }

}