url带？

http://ip:port/user/selectuserbyid?user_id=1

/**
     * @param user_id
     * @return loginResultdto
     * @description 根据id查询用户
     * @date 2022-03-17
     */
    @ApiOperation(value = "根据id查询用户", notes = "根据id查询用户", httpMethod = "GET", response = UserResultdto.class)
    @RequestMapping(method = RequestMethod.GET, value = "/selectuserbyid")
    public CommonResult selectUserById(@RequestParam("user_id") int user_id) {
        User res = iUserService.selectUserById(user_id);
        if (res != null) {
            //数据库查询成功
            return CommonResult.success(new UserResultdto(res), "查询成功");
        } else {
            return CommonResult.failed("参数错误");
        }
    }

url/后直接是数据

@RestController
public class HelloController {
    @GetMapping("/hello/{name}")
    public String hello(@PathVariable("name") String name){
        return "你好，" + name + " !";
    }
}