How to read data from Excel (.xlsb) Binary File Format?

Question

I am using the POI 3.9 to read data from xlsx. But now I face an issue, the POI don't support the xlsb files, and I need to read data from xlsb programly. Does anybody know how to read data from xlsb programly? Appreciated.

Answer 1

Using poi you can read XLSB to DB, Structure(XML,...), List of Contents or etc.
The following code convert XLSB to List of row/comment lists and map for extra info.
Just you can customize the code according your needs.

Please find many examples from link; thanks to authors of poi.

// Main class

package excel;

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 Excel {

    public static void main (String [] args){

        String xlsbFileName = "C:\\Users\\full path to .xlsb file";
        callXLToList(xlsbFileName);        
    }

    static void callXLToList(String xlsbFileName){
        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<XLSB2Lists> workBookAsList = new ArrayList<>();
            int sheetNr = 1;
            while (it.hasNext()) {
                InputStream is = it.next();
                String name = it.getSheetName();

                System.out.println("Begin parsing sheet "+sheetNr+": "+name);

                XLSB2Lists testSheetHandler = new XLSB2Lists();
                testSheetHandler.startSheet(name);
                XSSFBSheetHandler sheetHandler = new XSSFBSheetHandler(is,
                        xssfbStylesTable,
                        it.getXSSFBSheetComments(),
                        sst, testSheetHandler,
                        new DataFormatter(),
                        false);
                sheetHandler.parse();
                testSheetHandler.endSheet();

                System.out.println("End parsing sheet "+sheetNr+": "+name);
                sheetNr++;

                // Add parsed sheet to workbook list
                workBookAsList.add(testSheetHandler);
            }

            // For every sheet in Workbook
            System.out.println("\nShort Report:");
            for(XLSB2Lists sheet:workBookAsList){
                // sheet content
                System.out.println("Size of content: " +sheet.getSheetContentAsList().size());
                // sheet comment
                System.out.println("Size fo comment: "+sheet.getSheetCommentAsList().size());
                // sheet extra info
                System.out.println("Extra info.: "+sheet.getMapOfInfo().toString());                
            }

        } catch (InvalidFormatException e) {
            // TODO Please do your catch hier
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Please do your catch hier
            e.printStackTrace();
        } catch (OpenXML4JException e) {
            // TODO Please do your catch hier
            e.printStackTrace();
        } catch (SAXException e) {
            // TODO Please do your catch hier
            e.printStackTrace();
        }
    }
}

// Parsing class

package excel;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.poi.xssf.eventusermodel.XSSFSheetXMLHandler;
import org.apache.poi.xssf.usermodel.XSSFComment;

/**
 *
 * @author Dominique
 */
public class XLSB2Lists implements XSSFSheetXMLHandler.SheetContentsHandler {

    private final List sheetAsList = new ArrayList<>();
    private List rowAsList;
    private final List sheetCommentAsList = new ArrayList<>();
    private List rowCommentAsList;
    private final Map propertyMap = new HashMap<>();

    public void startSheet(String sheetName) {
        propertyMap.put("sheetName", sheetName);
    }

    @Override
    public void startRow(int rowNum) {
        rowAsList = new ArrayList<>();
        rowCommentAsList = new ArrayList<>();
    }

    @Override
    public void endRow(int rowNum) {
        sheetAsList.add(rowNum, rowAsList);
        sheetCommentAsList.add(rowNum, rowCommentAsList);
    }

    @Override
    public void cell(String cellReference, String formattedValue, XSSFComment comment) {
        formattedValue = (formattedValue == null) ? "" : formattedValue;
        rowAsList.add(formattedValue);
        if (comment == null) {
            rowCommentAsList.add("");
        } else {
            propertyMap.put("comment author at "+comment.getRow()+":"+cellReference, comment.getAuthor());
            rowCommentAsList.add(comment.getString().toString().trim());
        }
    }

    @Override
    public void headerFooter(String text, boolean isHeader, String tagName) {
        if (isHeader) {
            propertyMap.put("header tag", tagName);
            propertyMap.put("header text", text);
        } else { // footer
            propertyMap.put("header tag", tagName);
            propertyMap.put("header text", text);
        }
    }

    public List getSheetContentAsList(){
        return sheetAsList;
    }

    public List getSheetCommentAsList(){
        return sheetCommentAsList;
    }

    public Map getMapOfInfo(){
        return propertyMap;
    }
}