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@Munawwar
Last active November 2, 2022 08:37
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Java - Apache POI - Convert XLS/XLSX to CSV
/*
* Dependencies: Apache POI Library from http://poi.apache.org/
*/
package poi_excels;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
public class ExcelReading {
public static void echoAsCSV(Sheet sheet) {
Row row = null;
for (int i = 0; i <= sheet.getLastRowNum(); i++) {
row = sheet.getRow(i);
for (int j = 0; j < row.getLastCellNum(); j++) {
System.out.print("\"" + row.getCell(j) + "\";");
}
System.out.println();
}
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
InputStream inp = null;
try {
inp = new FileInputStream("myxlsx/sample.xlsx");
Workbook wb = WorkbookFactory.create(inp);
for(int i=0;i<wb.getNumberOfSheets();i++) {
System.out.println(wb.getSheetAt(i).getSheetName());
echoAsCSV(wb.getSheetAt(i));
}
} catch (InvalidFormatException ex) {
Logger.getLogger(ExcelReading.class.getName()).log(Level.SEVERE, null, ex);
} catch (FileNotFoundException ex) {
Logger.getLogger(ExcelReading.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(ExcelReading.class.getName()).log(Level.SEVERE, null, ex);
} finally {
try {
inp.close();
} catch (IOException ex) {
Logger.getLogger(ExcelReading.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
@RainerBlessing
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getLastRowNum() returns a zero based number, so it should be "<=" in the for loop

@Munawwar
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Author

Munawwar commented Jan 8, 2013

Right, updated the gist. Ref

@dsangria119
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Hello,

What are your terms of usage for this code?

Thank you!

@mbe24
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mbe24 commented Nov 10, 2017

@Sathishboobalan
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is any API(open source) to create csv file with one line(without looping data)?

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