Download popup dialog can be displayed by
window.location = "someUrl" or just simply have a link that send HTTP GET method and so on. I've done this successfully.
But now I want to do Ajax with HTTP POST. The POST body has JSON like
{"val1":"key1", "val2":"key2"} Then in servlet side, it read the JSON and execute query against DB to get data then generate Excel based on the query data.
The part I can't get it working is client side.
Assugming that my servlet at resources/report/schedule generates Excel file.
This does not popup download dialog when using Ajax :( Can anybody help me how to have download dialog with Ajax?
function post25() { var jsonInput = {}; jsonInput['作業区コード'] = "481"; jsonInput['機械コード'] = "11"; jsonInput['作業日'] = "2000/01/01"; jsonInput = JSON.stringify(jsonInput); var ajaxRequest = new XMLHttpRequest(); ajaxRequest.onreadystatechange = function() { if(ajaxRequest.readyState == 4 && ajaxRequest.status == 200) { var res = ajaxRequest.responseText; //location.href = "../resources/report/schedule"; } else if(ajaxRequest.status == 409 || ajaxRequest.status == 500 || ajaxRequest.status == 204) { alert(ajaxRequest.status); document.getElementById("showMessage").innerHTML = ajaxRequest.responseText; } } ajaxRequest.open("POST", "../resources/report/schedule", true); ajaxRequest.setRequestHeader("Content-Type", "application/json"); ajaxRequest.send(jsonInput); }//end post25() 
