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將檔案以流的形式傳給前端,前端點選按鈕下載

function getagimislog(btn){  
var filePath = document.getElementById("filepath").innerHTML;
var tr = btn.parentNode.parentNode;
var tds = tr.getElementsByTagName("td");
var fileName = tds[0].innerHTML;
window.location.href = "<%=basePath%>intelligentjournal/getagimislog.do?filePath=" + filePath + "&fileName=" + fileName;
}