Exception reading XLSB File Apache POI java.io.CharConversionException

Question

Im developing a Java aplication that reads an excel xlsb file using Apache POI, but I got an exception while reading it, my code is as follows:

import java.i         


        

Answer 1

I have tried reading XLSB file using Apache POI and it is successful. Below is the code snippet I have used.

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.exceptions.OpenXML4JException;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.xssf.binary.XSSFBSharedStringsTable;
import org.apache.poi.xssf.binary.XSSFBSheetHandler;
import org.apache.poi.xssf.binary.XSSFBStylesTable;
import org.apache.poi.xssf.eventusermodel.XSSFBReader;
import org.xml.sax.SAXException;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

public class ApachePoiXLSB {

    public static void main (String [] args){

        String xlsbFileName = "test.xlsb";

        OPCPackage pkg;

        try {
            pkg = OPCPackage.open(xlsbFileName);
            XSSFBReader r = new XSSFBReader(pkg);
            XSSFBSharedStringsTable sst = new XSSFBSharedStringsTable(pkg);
            XSSFBStylesTable xssfbStylesTable = r.getXSSFBStylesTable();
            XSSFBReader.SheetIterator it = (XSSFBReader.SheetIterator) r.getSheetsData();

            List sheetTexts = new ArrayList<>();
            while (it.hasNext()) {
                InputStream is = it.next();
                String name = it.getSheetName();
                TestSheetHandler testSheetHandler = new TestSheetHandler();
                testSheetHandler.startSheet(name);
                XSSFBSheetHandler sheetHandler = new XSSFBSheetHandler(is,
                        xssfbStylesTable,
                        it.getXSSFBSheetComments(),
                        sst, testSheetHandler,
                        new DataFormatter(),
                        false);
                sheetHandler.parse();
                testSheetHandler.endSheet();
                sheetTexts.add(testSheetHandler.toString());
            }
            System.out.println("output text:"+sheetTexts);

        } catch (InvalidFormatException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (OpenXML4JException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (SAXException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}


import org.apache.poi.xssf.eventusermodel.XSSFSheetXMLHandler;
import org.apache.poi.xssf.usermodel.XSSFComment;

class TestSheetHandler implements XSSFSheetXMLHandler.SheetContentsHandler {

        private final StringBuilder sb = new StringBuilder();

        public void startSheet(String sheetName) {
            sb.append("");
        }

        public void endSheet() {
            sb.append("");
        }

        @Override
        public void startRow(int rowNum) {
            sb.append("\n");
        }

        @Override
        public void endRow(int rowNum) {
            sb.append("\n");
        }

        @Override
        public void cell(String cellReference, String formattedValue, XSSFComment comment) {
            formattedValue = (formattedValue == null) ? "" : formattedValue;
            if (comment == null) {
                sb.append("\n\t").append(formattedValue).append("");
            } else {
                sb.append("\n\t")
                        .append(formattedValue)
                        .append("")
                        .append(comment.getString().toString().trim()).append("")
                        .append("");
            }
        }

        @Override
        public void headerFooter(String text, boolean isHeader, String tagName) {
            if (isHeader) {
                sb.append("
").append(text).append("
");
            } else {
                sb.append("
").append(text).append("
");

            }
        }

        @Override
        public String toString() {
            return sb.toString();
        }
    }