How can I read .xlsx and .xls files in Java?

Question

hi I want to read an xlsx file or an xls file, whatever it is. can xssf support xls file? or do I need to write separate code for both file types?

Answer 1

Yes, you can use the Apache POI to read and write xlsx and xls files .

Answer 2

If you want your code to work for both, you need to use a package org.apache.poi.ss. This package was created to unify XSSF and HSSF.

Answer 3

xls xlsx

Workbook wb_xssf; //Declare XSSF WorkBook 
Workbook wb_hssf; //Declare HSSF WorkBook 
Sheet sheet=null; //sheet can be used as common for XSSF and HSSF WorkBook 

if(fileBean.getFileExt().equalsIgnoreCase("xls")){
    wb_hssf = new HSSFWorkbook();
    sheet = wb_hssf.getSheetAt(0);
}else if (fileBean.getFileExt().equalsIgnoreCase("xlsx")){
    wb_xssf = new XSSFWorkbook(fileBean.getFileInput());      
    sheet = wb_xssf.getSheetAt(0);                                                          
}

Answer 4

, Apache POI OpenCSV xlsx, xls csv.

, , :

RowConverter<Country> converter = (row) -> new Country(row[0], row[1]);

ExcelReader<Country> reader = ExcelReader.builder(Country.class)
     .converter(converter)
     .withHeader()
     .csvDelimiter(';')
     .sheets(1)
     .build();

List<Country> list;
list = reader.read("CountryCodes.xlsx");
list = reader.read("CountryCodes.xls");
list = reader.read("CountryCodes.csv");

github.

Answer 5

xlsx:

-, jar:

• dom4j-2.1.0.jar
• -3.17.jar
• -OOXML-3.17.jar
• -collections4-4.1.jar
• XMLBeans-2.3.0.jar

-, :

import org.apache.poi.ss.usermodel.*;
import java.io.File;
import java.io.IOException;
import java.io.FileInputStream;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

-, , , :

public void ReadExcelFiles(String pathxlsx,javax.swing.JTable jtable) throws IOException{
    //String nameSheet;
    File file = new File(pathxlsx);
    FileInputStream fis = new FileInputStream(file);
    XSSFWorkbook wb = new XSSFWorkbook(fis);
    // nameSheet=wb.getSheetName(0);
    //XSSFSheet sh = wb.getSheet(nameSheet);
    XSSFSheet sh = wb.getSheetAt(0);
    System.out.println(sh.getLastRowNum());
    System.out.println("Name: "+sh.getSheetName()); 
    Row row = sh.getRow(6);

    System.out.println(row.getRowNum());
    System.out.println("columna "+row.getCell(1).getStringCellValue());
    System.out.println("columna "+row.getCell(2).getStringCellValue());
    System.out.println("columna "+row.getCell(3).getStringCellValue());
    System.out.println("columna "+row.getCell(4).getStringCellValue());

    System.out.println("Val: "+sh.getRow(4).getCell(6).getStringCellValue()); 
}

Answer 6

( ):

public void parseXLSX() {

    String pathToXLSX = "file.xlsx";
    File file = new File(pathToXLSX);

    FileInputStream in = null;

    try {
        in = new FileInputStream(file);
        XSSFWorkbook workbook = new XSSFWorkbook(in);
        for (int i = 0; i < workbook.getNumberOfSheets(); i++) {
            XSSFSheet sheet = workbook.getSheetAt(i);
            int rowNumber = sheet.getLastRowNum() + 1;
            for (int j = 1; j < rowNumber; j++) {
                Iterator it = sheet.getRow(j).cellIterator();
                while (it.hasNext()) {
                    System.out.println(it.next().toString());
                }
            }
        }
    } catch (IOException ex) {
        ex.getMessage();
        ex.printStackTrace();
    } finally {
        if (in != null) {
            try {
                in.close();
            } catch (IOException ex) {
                ex.getMessage();
                ex.printStackTrace();
            }
        }
    }

}