Converting an CSV file to a JSON object in Java

Question

Is there an open source java library to convert a CSV (or XLS) file to a JSON object?

I tried using json.cdl, but somehow it does not seem to work for large CSV stri

Answer 1

I have used excel file in this code.you can use csv. i have wrote this class for particular Excel/csv format which is known to me.

import java.io.File;

public class ReadExcel {

    private String inputFile;

    public void setInputFile(String inputFile) {
        this.inputFile = inputFile;
    }

    public void read() throws IOException {
        File inputWorkbook = new File(inputFile);
        Workbook w;
        try {
            w = Workbook.getWorkbook(inputWorkbook);
            // Get the first sheet
            Sheet sheet = w.getSheet(0);
            // Loop over first 10 column and lines
            int columns = sheet.getColumns();
            int rows = sheet.getRows();
            ContactList clist = new ContactList();
            ArrayList contacts = new ArrayList();
            for (int j = 1; j < rows; j++) {
                Contact contact = new Contact();
                for (int i = 0; i < columns; i++) {
                    Cell cell = sheet.getCell(i, j);

                    switch (i) {
                    case 0:
                        if (!cell.getContents().equalsIgnoreCase("")) {
                            contact.setSrNo(Integer.parseInt(cell.getContents()));
                        } else {
                            contact.setSrNo(j);
                        }

                        break;
                    case 1:
                        contact.setName(cell.getContents());
                        break;
                    case 2:
                        contact.setAddress(cell.getContents());
                        break;
                    case 3:
                        contact.setCity(cell.getContents());
                        break;
                    case 4:
                        contact.setContactNo(cell.getContents());
                        break;
                    case 5:
                        contact.setCategory(cell.getContents());
                        break;
                    }

                }
                contacts.add(contact);

            }
            System.out.println("done");
            clist.setContactList(contacts);
            JSONObject jsonlist = new JSONObject(clist);
            File f = new File("/home/vishal/Downloads/database.txt");
            FileOutputStream fos = new FileOutputStream(f, true);
            PrintStream ps = new PrintStream(fos);

            ps.append(jsonlist.toString());

        } catch (BiffException e) {
            e.printStackTrace();
            System.out.println("error");
        }
    }

    public static void main(String[] args) throws IOException {
        ReadExcel test = new ReadExcel();
        test.setInputFile("/home/vishal/Downloads/database.xls");
        test.read();
    }
}

i have used jxl.jar for excel reading