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[英]Java Servlet for file download: Works when started from form submit, not when started from jQuery download
[英]Download File By jquery from java
我在通過 jquery 下載文件時遇到問題。
我有一個 post 函數,可以在 java 代碼中發送請求。
我返回文件,但這不會下載。
輸入
<input type="button" id="export-csv" value="Export result in CSV"/>
html-jquery 代碼
$( "#export-csv" ).click(function( ) {
var request=$.ajax({
method: "POST",
url: 'user/writeCsv',
data: $( "#search-form" ).serialize(),
dataType: "text/csv"
}).done(function(data) {
window.location.href = (data);
});
// $.post( "user/writeCsvToReturn", $( "#search-form" ).serialize())
});
Java代碼
@RequestMapping(value="/user/writeCsv",method=RequestMethod.POST)
public FileWriter writeCSVFile(HttpServletResponse response,ServerSearchCommand ssc, Model model, BindingResult result) throws IOException {
FileWriter fileWriter= new FileWriter("/tmp/searchcsv.csv");
fileWriter.flush();
//WRITE DATA FILE
fileWriter.close();
return fileWriter;
}
如果您不想提交表單,您可以在獲取請求中將文件寫入響應對象中:-
@RequestMapping(value="/user/writeCsv",method=RequestMethod.Get)
public void writeCSVFile(HttpServletResponse response,ServerSearchCommand ssc, Model model, BindingResult result) throws IOException {
OutputStream outStream = response.getOutputStream();
// Write data to this outStream
outStream.close();
}
在前端,側面將文件附加到 iFrame 並使 iFrame stye = display:none :-
var url = contextPath + "/user/writeCsv";
var hiddenIFrameID = 'frameid',
iframe = document.getElementById(hiddenIFrameID);
if (iframe === null) {
iframe = document.createElement('iframe');
iframe.id = hiddenIFrameID;
iframe.style.display = 'none';
document.body.appendChild(iframe);
}
iframe.src = url;
只是你不能。 由於安全原因,使用 Ajax 無法下載文件。 您所能做的就是提交表單請求。
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