frontend/src/services/authenticationService.js

import axios from "axios";

export default {
    login(username, password, apiUrl="http://localhost:8080"){
        const url = `${apiUrl}/users/checkLogin`
        const data = {
            username: username,
            password: password
        };
        return axios.post(url, data)
            .then(response => {
                alert(">login方法中<");
                alert(response.data);
                return response.data;
            });
    },
    register(){
        //跳转逻辑
    }
}