Springboot Thymeleaf模板文件调用Java类静态方法

    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>

package com.example.demo;

public class TestUtils {
  public static String toUpperCase(String s){
    return s.toUpperCase();
  }
}

package com.example.demo;

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

@Controller
public class TestController {
  @RequestMapping("/")
  public String test(){
    return "test";
  }

  public static String toLowerCase(String s){
    return s.toLowerCase();
  }
}