OneDayDay/src/main/java/com/lstznkj/groundstation/controller/MainController.java

package com.lstznkj.groundstation.controller;

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

@Controller
public class MainController {

    @GetMapping("/test")
    @ResponseBody
    public String test()
    {
        return "test";
    }

}