how to upload image on real server in java web app

I have tried

Part part = request.getPart("pimage1");
    String fileNameAbsolute = extractFileName(part);
    String fileName= extractFileNameEnd(fileNameAbsolute);
    out.println("got fileName \n");
    //String savePath ="E:\\ecom2\\WebContent\\images\\" + File.separator + fileName ;
    String savePath ="ecom2//WebContent//images" + File.separator + fileName ;
    System.out.println("filename is:"+fileName);
    out.println("filename is:"+fileName);
    String origPath="E:\\images\\"+  fileName ;
    //String origPath=fileName ;
    if(part!=null){
        out.println("in part if");
    copyFileUsingStream(origPath,savePath,out);
    out.print("image 1 copied successfully \n");
    }

method to extract filename which is at the end in filepath

private String extractFileName(Part part ){
    String contentDisp = part.getHeader("content-disposition");
    String[] items = contentDisp.split(";");
    for(String s: items){
        if(s.trim().startsWith("filename") ){
            return s.substring(s.indexOf("=") +2, s.length() -1 );
        }
    }
    return "";
}


  String extractFileNameEnd(String str) {
        String[] items = str.split("\\\\");
        int length= items.length ;
        return items[length-1] ;
    }

method to copy file

  //CopyFile
   private void copyFileUsingStream(String source, String dest,PrintWriter out) throws IOException {
       File sourcef = new File(source);
       File destf = new File(dest);
        InputStream is = null;
        OutputStream os = null;
        out.println("In the copyFile method 5line");
        try {
            is = new FileInputStream(sourcef);
            os = new FileOutputStream(destf);
            out.println("after fileinputStream and outputstream");
            byte[] buffer = new byte[1024];
            int length;
            while ((length = is.read(buffer)) > 0) {
                os.write(buffer, 0, length);
            }
            out.println("file copied successfully..");
        }catch(Exception e){
            out.println(e);
        }

there is error file not found E:\images\"+ fileName <-- in this line I think server not understanding E:\ what is anathor way of uploading image/file to server I am making web app in java and uploading in aws

This example is working fine in localhost but not in real server