JExcelAPI allows Java developers to read/generate Excel spreadsheets dynamically. Excel documents can also be stored in CSV file format at runtime.
The example below reads an Excel document and converts it into a CSV file.
import java.io.*;
import jxl.*;
import java.util.*;
class ConvertCSV
{
public static void main(String[] args)
{
try
{
//File to store data in form of CSV
File f = new File("input.csv");
OutputStream os = (OutputStream)new FileOutputStream(f);
String encoding = "UTF8";
OutputStreamWriter osw = new OutputStreamWriter(os, encoding);
BufferedWriter bw = new BufferedWriter(osw);
//Excel document to be imported
String filename = "input.xls";
WorkbookSettings ws = new WorkbookSettings();
ws.setLocale(new Locale("en", "EN"));
Workbook w = Workbook.getWorkbook(new File(filename),ws);
// Gets the sheets from workbook
for (int sheet = 0; sheet < w.getNumberOfSheets(); sheet++)
{
Sheet s = w.getSheet(sheet);
bw.write(s.getName());
bw.newLine();
Cell[] row = null;
// Gets the cells from sheet
for (int i = 0 ; i < s.getRows() ; i++)
{
row = s.getRow(i);
if (row.length > 0)
{
bw.write(row[0].getContents());
for (int j = 1; j < row.length; j++)
{
bw.write(',');
bw.write(row[j].getContents());
}
}
bw.newLine();
}
}
bw.flush();
bw.close();
}
catch (UnsupportedEncodingException e)
{
System.err.println(e.toString());
}
catch (IOException e)
{
System.err.println(e.toString());
}
catch (Exception e)
{
System.err.println(e.toString());
}
}
}
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