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Java: Apache poi Module org.slf4j not found, required by org.apache.poi.poi

I have added all the jars for apache poi into the module path for this project but anytime I try to use it I get the error
Error occurred during initialization of boot layer
java.lang.module.FindException: Module org.slf4j not found, required by org.apache.poi.poi
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Iterator;
import org.apache.poi.ss.usermodel.Cell;
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.xssf.usermodel.XSSFWorkbook;
public class DataTesting {
public static void main(String[] args) throws IOException {
String excelFilePath = "H:\\exceltest\\test1.xlsx";
FileInputStream inputStream = new FileInputStream(new File(excelFilePath));
Workbook workbook = new XSSFWorkbook(inputStream);
Sheet firstSheet = workbook.getSheetAt(0);
Iterator<Row> iterator = firstSheet.iterator();
while (iterator.hasNext()) {
Row nextRow = iterator.next();
Iterator<Cell> cellIterator = nextRow.cellIterator();
while (cellIterator.hasNext()) {
Cell cell = cellIterator.next();
switch (cell.getCellType()) {
case STRING:
System.out.print(cell.getStringCellValue());
break;
case BOOLEAN:
System.out.print(cell.getBooleanCellValue());
break;
case NUMERIC:
System.out.print(cell.getNumericCellValue());
break;
}
System.out.print(" - ");
}
System.out.println();
}
workbook.close();
inputStream.close();
}

Searching Specific Excel Cell using Java Apache POI

I am using Apache POI API to read Excel file and check the quantity of products available or not. I am successfully reading excel file using below code but I am unable to read the specific cell (Quantity Column) to check weather asked product is available or not
package practice;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Iterator;
public class ReadingExcel {
private static String brand = "Nike";
private static String shoeName = "Roshe One";
private static String colour = "Black";
private static String size = "9.0";
private static String quantity;
public static void main(String [] args){
try {
FileInputStream excelFile = new FileInputStream(new File("C:\\Users\\admin\\Downloads\\Project\\assets\\Shoe_Store_Storeroom.xlsx"));
Workbook workbook = new XSSFWorkbook(excelFile);
Sheet datatypeSheet = workbook.getSheetAt(0);
DataFormatter dataFormatter = new DataFormatter();
Iterator<Row> iterator = datatypeSheet.iterator();
while (iterator.hasNext()) {
Row currentRow = iterator.next();
Iterator<Cell> cellIterator = currentRow.iterator();
while (cellIterator.hasNext()) {
Cell cell = cellIterator.next();
String cellValue = dataFormatter.formatCellValue(cell);
System.out.print(cellValue + "\t\t");
}
System.out.println();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
this is my excel file

using opencsv 4.1 i do this
import org.apache.commons.lang.StringUtils;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
...
try (InputStream excelFile = new FileInputStream(new File(fileName));
Workbook wb = new XSSFWorkbook(excelFile);) {
for (int numSheet = 0; numSheet < wb.getNumberOfSheets(); numSheet++) {
Sheet xssfSheet = wb.getSheetAt(numSheet);
xssfSheet.forEach(row -> {
Cell cell = row.getCell(0);
if (cell != null) {
if(StringUtils.isNumeric(cell.getStringCellValue())){
// Use here cell.getStringCellValue()
}
}
});
}
}

Use below for loop:
for(int r=sh.getFirstRowNum()+1; r<=sh.getLastRowNum(); r++){ //iterating through all the rows of excel
Row currentRow = sh.getRow(r); //get r'th row
Cell quantityCell = currentRow.getCell(4); //assuming your quantity cell will always be at position 4; if that is not the case check for the header value first
String currentCellValue = quantityCell.getStringCellValue();
if(currentCellValue.equalsIgnoreCase(<value you want to campare with>))
//<do your further actions here>
else
//do your further actions here
}

How to Get Cell value from Excel sheet in Java according to particular Column name and Row name

I want to get cell value according to the particular column name and row name.
This is the code that I have written to achieve it. It's working fine for the first sheet in the workbook but giving me Null pointer exception for the other sheet in the same workbook.
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.apache.poi.ss.usermodel.DataFormatter;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelReader {
public FileInputStream fis;
String path = null;
private XSSFWorkbook workbook=null;
private XSSFSheet sheet;
private XSSFRow row=null;
private XSSFCell cell=null;
public ExcelReader() throws IOException {
path = System.getProperty("user.dir") + "\\Testdata.xlsx";
fis = new FileInputStream(path);
workbook = new XSSFWorkbook(fis);
}
public String getCellData(String sheetName, String testDataType, String testDataID) throws IOException {
sheet = workbook.getSheet(sheetName);
int i;
for(i=0;i<=sheet.getRow(0).getLastCellNum(); i++) {
row = sheet.getRow(0);
cell = row.getCell(i);
if(cell.getStringCellValue().equalsIgnoreCase(testDataType)) {
break;
}
}
for(int j=0; j<=sheet.getLastRowNum();j++) {
row = sheet.getRow(j);
cell= row.getCell(0);
DataFormatter df2 = new DataFormatter();
String valueAsString = df2.formatCellValue(cell);
if(testDataID.equals(valueAsString)) {
break;
}
}
cell=row.getCell(i);
String S= cell.getStringCellValue();
fis.close();
return S;
}
}

unable to replace the date in the excel file using java

Requirement
i need to open excel file. Then i need to check for the date(12/31/2014). If this exist in the file then i need replace with 11/28/2014. Actually excel file is containing the date. But in my code is never passing this condition if (df.format(DateUtil.getJavaDate(cell.getNumericCellValue())).equals(df.format(asOfDate))) {.
Here is the code:
package excelAsOfDate;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ExcelAsOfDate {
public static void main(String[] args) {
try {
DateFormat df = new SimpleDateFormat("dd/MM/yyyy");
Date asOfDate = df.parse("12/31/2014");
Date newAsOfDate = df.parse("11/28/2014");
System.out.println("date as of" + df.format(asOfDate));
File directory = new File("C://Users//kondeti.venkatarao//Documents//Regresion_sheets//test");
File[] files = directory.listFiles();
for (File file : files) {
if (file.getName().toLowerCase().endsWith(".xlsx")) {
FileInputStream fis = new FileInputStream(file.getAbsoluteFile());
// Create Workbook instance holding reference to .xlsx file
XSSFWorkbook workbook = new XSSFWorkbook(fis);
int i = 1;
while (i < workbook.getNumberOfSheets()) {
// Get first/desired sheet from the workbook
XSSFSheet sheet = workbook.getSheetAt(i);
// Iterate through each rows one by one
Iterator<Row> rowIterator = sheet.iterator();
while (rowIterator.hasNext()) {
Row row = rowIterator.next();
// For each row, iterate through all the columns
Iterator<Cell> cellIterator = row.cellIterator();
while (cellIterator.hasNext()) {
Cell cell = cellIterator.next();
// Check the cell type and format accordingly
switch (cell.getCellType()) {
case Cell.CELL_TYPE_NUMERIC:
if (DateUtil.isCellDateFormatted(cell)) {
if (df.format(DateUtil.getJavaDate(cell.getNumericCellValue())).equals(df.format(asOfDate))) {
// System.out.println(df.format(cell.getDateCellValue()));
System.out.println(df.format(DateUtil.getJavaDate(cell.getNumericCellValue())));
CreationHelper createHelper = workbook.getCreationHelper();
CellStyle cellStyle = workbook.createCellStyle();
cellStyle.setFillForegroundColor(IndexedColors.RED.getIndex());
cellStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
cellStyle.setDataFormat(createHelper.createDataFormat().getFormat("m/d/yy"));
cell.setCellValue(newAsOfDate);
cell.setCellStyle(cellStyle);
}
}
break;
}
}
}
i++;
fis.close();
}
//FileOutputStream fileOut = new FileOutputStream("C://Users//kondeti.venkatarao//Documents//Regresion_sheets//test//final//"+file.getName());
FileOutputStream fileOut = new FileOutputStream(file.getAbsoluteFile());
workbook.write(fileOut);
fileOut.close();
fis.close();
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

Logging is a key to find your answers.
As I look into the Cell class, I see there is a method named :
getDateCellCalue()
When we look at the setter of that :
void setCellValue(java.util.Date value)
Converts the supplied date to its equivalent Excel numeric value and sets that into the cell.
So you are not comparing correct.
Mine quick suggestion is :
if (df.format(cell.getDateCellValue()).equals(df.format(asOfDate)))
If this doesn't work, put logging on what the df.format(cell.getDateCellValue() produces as String.
Edit :
Did you also noticed this :
DateFormat df = new SimpleDateFormat("dd/MM/yyyy");
Date asOfDate = df.parse("12/31/2014");
Your second date is MM/dd/yyyy

Not able to write output in the excel file using poi in selenium code

I am writing a code to fetch data from an excel sheet and run selenium tests on it and write the output in a different excel file. But I am not able to view the output in the output file. I am getting error as excel found unreadable content in .xlsx message after java code.
package new_excel_package;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.eclipse.debug.core.model.MemoryByte;
import org.openqa.selenium.By;
import org.openqa.selenium.WebDriver;
import org.openqa.selenium.firefox.FirefoxDriver;
public class PoiReadExcelFile {
public static void main(String[] args) {
try {
WebDriver driver = new FirefoxDriver();
FileInputStream fileInputStream = new FileInputStream("D://new.xlsx");
XSSFWorkbook workbook = new XSSFWorkbook(fileInputStream);
XSSFSheet worksheet = workbook.getSheet("check");
FileOutputStream fileOut = new FileOutputStream("D://test.xlsx",true);
XSSFWorkbook workbook_out = new XSSFWorkbook();
XSSFSheet worksheet_out = workbook_out.createSheet("Worksheet");
MemoryByte ms = new MemoryByte();
for(int i = 0; i < worksheet.getLastRowNum()+1;i++)
{
XSSFRow row = worksheet.getRow(i);
//System.out.println(row.toString());
int r = worksheet_out.getLastRowNum();
XSSFRow row1 = worksheet_out.createRow(r+1);
XSSFCell cell_user = row.getCell(0);
String user_names = cell_user.getStringCellValue();
CharSequence[] user_name = {cell_user.getStringCellValue()};
System.out.println("fetched username");
XSSFCell cell_mail = row.getCell(1);
String e_mails = cell_mail.getStringCellValue();
CharSequence[] e_mail = {cell_mail.getStringCellValue()};
System.out.println("fetched email");
driver.get("file:///D:/SANDEEP/html%20sample.html");
driver.findElement(By.name("Name")).sendKeys(user_name);
driver.findElement(By.name("Email")).sendKeys(e_mail);
driver.findElement(By.name("Submit")).click();
//String status = "done";
System.out.println("authenticated for" + user_names);
/*XSSFCell cell_user_out = row1.createCell(0);
cell_user_out.setCellValue(user_names.toString());
XSSFCell cell_mail_out = row1.createCell(1);
cell_user_out.setCellValue(e_mails.toString());
XSSFCell cell_stat_out = row1.createCell(2);
cell_user_out.setCellValue("done");*/
row1.createCell(0,i).setCellValue(user_names.toString());
row1.createCell(1,i).setCellValue(e_mails.toString());
row1.createCell(2,i).setCellValue("done");
System.out.println("user updated");
/*workbook_out.write(fileOut);
System.out.println("elements updated2");*/
}
//workbook.Save("D://test.xlsx",FileFormatType.Excel2007Xlsx);
workbook.write(fileOut);
fileOut.flush();
fileOut.close();
driver.close();
System.out.println("elements updated");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}

I am also reading the inputs from an excel document and writing the output in a separate excel(.xls) document. Unlike you, I have used HSSFWorkbook which only allows my output to be written in .xls but that should not impact the implementation.
The notable difference I can see is you are writing the workbook before closing the file as shown below:
workbook.write(fileOut);
fileOut.flush();
fileOut.close();
This is how I implemented it:
HSSFWorkbook workbook = new HSSFWorkbook();
String fileName = "excelDoc\\" +(new SimpleDateFormat("dd-MM-yy--hh-mm-ss").format(Calendar.getInstance().getTime()))+ ".xls"; //relative location of file + Time stamp based file name (.xls)
System.out.println(fileName);
FileOutputStream file1 = new FileOutputStream (new File(fileName));
HSSFSheet spreadSheet = workbook.createSheet("Result Document");
HSSFRow row = spreadSheet.createRow((short) 0);
HSSFCell cell;
//Creating rows and filling them with data
cell = row.createCell(0);
cell.setCellValue(new HSSFRichTextString("Test No"));
cell = row.createCell(1);
cell.setCellValue(new HSSFRichTextString("Test Result"));
//Please see below and compare
file1.close(); //Closing the file
FileOutputStream outFile =new FileOutputStream(new File(fileName)); //Creating new file
workbook.write(outFile); //printing the data in the new file
outFile.close(); //closing the new file
System.out.println("The Result are now printed in the excel sheet");

You're missing out this,
XSSFWorkbook workbook_out = new XSSFWorkbook(fileOut);