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// 創(chuàng)建a標簽?zāi)M下載
function exportExcel(params, filename) {
    return $http({
        url: '/api/exportExcel',
        method: "POST",
        headers: {
            'Content-type': 'application/json'
        },
        params: params,
        responseType: 'arraybuffer'
    }).success(function (data) {
        var blob = new Blob([data], {type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"});
        var objectUrl = URL.createObjectURL(blob);
        var a = document.createElement('a');
        document.body.appendChild(a);
        a.setAttribute('style', 'display:none');
        a.setAttribute('href', objectUrl);
        a.setAttribute('download', filename);
        a.click();
        URL.revokeObjectURL(objectUrl);
    });
}