I have thousands of record which are stored in a excel sheet and I need to upload those records into database, And currently I am using Spring controller class for upload, And inside my class I use simple BufferedOutputStream and FileReader classes, So my requirement is I need to show a Jquery progress-bar including percentages while uploading my data into database.
My sample code.
String rootPath = request.getSession().getServletContext().getRealPath("/");
File dir = new File(rootPath + File.separator + "uploadedfile");
if (!dir.exists()) {
dir.mkdirs();
}
File serverFile = new File(dir.getAbsolutePath() + File.separator + form.getEmpFile().getOriginalFilename());
try {
try (InputStream is = form.getEmpFile().getInputStream();
BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(serverFile))) {
int i;
//write file to server
while ((i = is.read()) != -1) {
stream.write(i);
}
stream.flush();
}
}
catch (IOException e) {
model.addAttribute("msg", "failed to process file because : " + e.getMessage());
}
String[] nextLine;
try (FileReader fileReader = new FileReader(serverFile); CSVReader reader = new CSVReader(fileReader, ';', '\'', 1);) {
while ((nextLine = reader.readNext()) != null) {
for (int i = 0; i < nextLine.length; i++) {
nextLine[i] = nextLine[i].trim();
if (!nextLine[i].equals("")) {
String[] data = nextLine[i].split(",");
Maybe this can help:
1-
public class ExtractController {
********
// I created a global variable here
int percentage = 0;
Workbook workbook;
@RequestMapping(value ="/uploadExcel", method = RequestMethod.POST)
public @ResponseBody String uploadExcel(Model model, @RequestParam("excelfile") MultipartFile excelfile,
HttpServletResponse response) {
**********
try {
int i = 0;
*********
while (i <= worksheet.getLastRowNum()) {
percentage = Math.round(((i * 100) / worksheet.getLastRowNum()));
Row row = worksheet.getRow(i++);
}
*********
}catch (Exception e) {
e.printStackTrace();
}
return "extract";
}
@RequestMapping(value = "/getpercent", method = RequestMethod.GET)
public @ResponseBody String getPerc(@RequestParam("param") String param) {
************
// you return the value of the global variable when the action is called
return percrentage;
}
}
1-
$.ajax({
url : 'uploadExcel',
type : 'POST',
data : new FormData(this),
beforeSend : function() {
$('#valid').attr("disabled", true);
// I call my loop function
loop();
},
success : function(data) {
$('#valid').attr("disabled", false);
}
});
function loop() {
$.ajax({
url : 'getpercent',
type : 'GET',
success : function(response) {
count = response;
// this function updates my progress bar with the new value
change(count);
*********
}
});
var time = 2000;
if(count < 100){
setTimeout(loop, time);
}
}
;
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