changing uploaded file in JSP through JavaScript -


can 1 give me proper example changing uploaded file in jsp?

this jsp page code.

<div class="action"> <input type="file" name="files[0]" id="file0" style="float: left" required>  <input type="button" id="btnzoomin" value="+" style="float: left"> <input type="button" id="btnzoomout" value="-" style="float: left"> <input type="button" id="btncrop" value="crop" style="float: left"> <input type="submit" value="upload file" style="float: right" /> </div>   <div class="cropped"> </div> 


using js , css cropping uploaded image ...

js

document.queryselector('#btncrop').addeventlistener('click',                             function() {                                 var img = cropper.getdataurl();                                  document.queryselector('.cropped').innerhtml = '<img name="img123" src="'+img+'">';                               }) 

this

 cropper.getdataurl()
provide me cropped image unable set image uploaded file file0 or files[0] pass servlet. how can so?


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