如何經過jquery Ajax 下載 spring rest 的文件（字節數組對象）

#水·滴# 如何經過jquery Ajax 下載 spring rest 的字節數組對象：

return ResponseEntity.ok()

        .contentType(new MediaType(MediaType.APPLICATION_OCTET_STREAM, Charset.forName("UTF-8")))

        .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + new String("成果報告.docx".getBytes("UTF-8"), "GB2312"))
        .body(bos.toByteArray());
複製代碼

Spring 默認返回二進制對象，JQuery默認接收string，所以須要修改JQuery的接收類型：

$.ajax({
    type: 'get',
    url: " http://10.10.190.222:9080/QualityCheck/dev/excel/statisExport/2",
    headers: {
        'Authorization': "eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiJhZG1pbiIsImF1ZGllbmNlIjoid2ViIiwiY3JlYXRlZCI6MTU2Njk1NjMxNjcxNSwiZXhwIjoxNTY3NTYxMTE2fQ.OSXLq81QyG1N2JaYXQbjFCUcEPN85xnLvqF7RrtAM_MGEChoSLmc0sDmLJlg4RZLwTyCTOuCCljl6WdIgpuvnA"
    },
    // xhrFields: {
    //     responseType: 'blob'
    // },
    // 當出錯時是text，所以不能直接設blob
    xhr: function () {
        var xhr = new XMLHttpRequest();
        xhr.onreadystatechange = function () {
            if (xhr.readyState == 2) {
                if (xhr.status == 200) {
                    xhr.responseType = "blob";
                } else {
                    xhr.responseType = "text";
                }
            }
        };
        return xhr;
    },
    success: function (response, msg, xhr) {
        console.log("success", response)
        // FileSaver.saveAs(response, "t.xlsx")
        var blob = new Blob([response], { type: 'application/octet-stream' });
        var filename = "成果彙總表.xlsx";
        var download_URL = URL.createObjectURL(response);
        // debugger;
        if (filename) {
            var a_link = document.createElement('a');
            a_link.rel = 'noopener';
            if (typeof a_link.download == 'undefined') {
                window.location = download_URL;
            } else {
                a_link.href = download_URL;
                a_link.download = filename;
                document.body.appendChild(a_link);
                a_link.click();
            }
        } else {
            window.location = download_URL;
        }
        setTimeout(function () {
            URL.revokeObjectURL(download_URL);
        }, 10000);

    },
    error: function (error) {
        console.log("error ", error)
    }
});

複製代碼

stackoverflow.com/questions/1…