下载弹出的对话框中可以通过

 了window.location =someUrl
 

或者只是具有发送HTTP GET方法等的链接。我已经成功地做​​到了这一点。

但现在我想要做的Ajax和HTTP POST。在POST身体有JSON像

  {VAL1：KEY1，val2的：键2}
 

然后在servlet的一面，它读取JSON和执行查询对数据库获取数据，然后生成Excel的基于查询的数据。

我无法得到它的工作的部分是客户端。

Assugming我的servlet在资源/报告/进度生成Excel文件。

使用Ajax时不弹出下载对话框:( 任何人可以帮助我如何让下载对话框与阿贾克斯？

 函数post25（）{
            变种jsonInput = {};
            jsonInput ['作业区コード'] =481;
            jsonInput ['机械コード'] =11;
            jsonInput ['作业日'] =2000年1月1日;
            jsonInput = JSON.stringify（jsonInput）;

            VAR ajaxRequest =新XMLHtt prequest（）;
            ajaxRequest.onreadystatechange =功能（）{
                如果（ajaxRequest.readyState == 4和＆安培; ajaxRequest.status == 200）{
                    VAR解析度= ajaxRequest.responseText;
                    //location.href =../resources/report/schedule;
                }
                否则，如果（ajaxRequest.status == 409 || ajaxRequest.status == 500 || ajaxRequest.status == 204）{
                    警报（ajaxRequest.status）;
                    的document.getElementById（showMessage）的innerHTML = ajaxRequest.responseText。
                }
            }
            ajaxRequest.open（POST，../resources/report/schedule，真正的）;
            ajaxRequest.setRequestHeader（内容类型，应用/ JSON）;
            ajaxRequest.send（jsonInput）;
        } //结束post25（）
 

解决方案

出于安全原因的不允许使用AJAX 以下载文件。

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()

For security reason it is not allowed to download file using ajax.