【Javascript】【上传文件】原生javascript代码实现文件上传

    
        
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        document.querySelector("#button").onclick = function () {
            let fileObj = document.querySelector("#file").files[0];
            let url = "http://120.79.226.165:7080/xuanjiao/file/upload";
            let form = new FormData();
            form.append("file", fileObj);
            let request = new XMLHttpRequest();
            request.open("post", url, true);
            request.onload = function () {
                let response = JSON.parse(request.responseText);
                alert(response.data.url);
            };
            request.send(form);
        };