Exporting data into csv format

Use Open CSV to export the data.

Here I have given download option for the whole table.

I am getting the whole table data as a list.And making csv values and storing in csv file.

public void exportEvent(ActionRequest actionRequest,ActionResponse actionResponse) throws SystemException, IOException{
       List<stuadmission> admissions = stuadmissionLocalServiceUtil.getstuadmissions(-1, -1);

             
    CSVWriter writer = new CSVWriter(new FileWriter("/home/filename.csv"), '\t');
    for (stuadmission student : admissions){
            String str = Integer.toString(student.getAdmissionno());
           String str2 = str + ","+ student.getBatch();
           
            String[] strings = str2.split(",");
            writer.writeNext(strings);
                   writer.close();}
               
        }