While Trying to write into Excel file getting Null pointer Exception coming from line sheet.createRow(1).createCell(5).setCellValue("Pass");
Not getting why this error is coming :(
package com.qtpselenium.Test;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import com.qtpselenium.util.Xls_Reader;
public class ReturnTestCaseResult {
public static void main(String[] args) {
String path =System.getProperty("user.dir") + "\\src\\com\\qtpselenium\\xls\\suiteA.xlsx";
/* Xls_Reader xlsr = new Xls_Reader(System.getProperty("user.dir") + "\\src\\com\\qtpselenium\\xls\\suiteA.xlsx");
ReportDataSetResult(xlsr, "TestCaseA1", 3, "Pass" , path);*/
ReportDataSetResult("TestCaseA1", path);
}
public static void ReportDataSetResult( String TestCaseName , String path){
System.out.println(TestCaseName +"----"+ path);
try {
FileInputStream fileinp = new FileInputStream(path);
XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet sheet = workbook.getSheet(TestCaseName);
sheet.createRow(1).createCell(5).setCellValue("Pass");
FileOutputStream fileout = new FileOutputStream(path);
workbook.write(fileout);
fileout.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
You have used the no arg constructor to create the workbook:
XSSFWorkbook workbook = new XSSFWorkbook();
which means there are no sheets in the workbook. This means your sheet variable will be null. I think you want to pass the FileInputStream fileinp into the workbook constructor so that it reads from an existing file?
XSSFWorkbook workbook = new XSSFWorkbook(fileinp);
Otherwise you will need to create a sheet called TestCaseName in the workbook before you can start adding rows to it.
Maybe, row(1) is null, you can try to create it first.
Related
I'm trying to apply encryption to a binary xls file with Apache POI.
While I can successfully encrypt xml based files, if I encrypt a binary one I can't open it and I get the wrong password error.
This is my code:
#Test
public void testEncryption() throws Exception {
File file = new File("file.xls");
Workbook workbook = new HSSFWorkbook();
setData(workbook);
FileOutputStream fileOutputStream = new FileOutputStream(file);
workbook.write(fileOutputStream);
fileOutputStream.close();
encryptFile(file, "pass");
}
public void encryptFile(File file, String encryptKey) throws Exception {
FileInputStream fileInput = new FileInputStream(file.getPath());
BufferedInputStream bufferInput = new BufferedInputStream(fileInput);
POIFSFileSystem poiFileSystem = new POIFSFileSystem(bufferInput);
Biff8EncryptionKey.setCurrentUserPassword(encryptKey);
HSSFWorkbook workbook = new HSSFWorkbook(poiFileSystem, true);
FileOutputStream fileOut = new FileOutputStream(file.getPath());
workbook.writeProtectWorkbook(Biff8EncryptionKey.getCurrentUserPassword(), "");
workbook.write(fileOut);
bufferInput.close();
fileOut.close();
Biff8EncryptionKey.setCurrentUserPassword(null);
}
To encrypt HSSF you simply do Biff8EncryptionKey.setCurrentUserPassword before writing the HSSFWorkbook.
Simplest example is as this:
import java.io.FileOutputStream;
import org.apache.poi.hssf.record.crypto.Biff8EncryptionKey;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
public class EncryptHSSF {
static void setData(HSSFWorkbook workbook) {
Sheet sheet = workbook.createSheet();
Row row = sheet.createRow(0);
Cell cell = row.createCell(0);
cell.setCellValue("Test");
}
public static void main(String[] args) throws Exception {
try (HSSFWorkbook workbook = new HSSFWorkbook();
FileOutputStream out = new FileOutputStream("file.xls") ) {
setData(workbook);
Biff8EncryptionKey.setCurrentUserPassword("pass");
workbook.write(out);
}
}
}
This works for me. If I open file.xls using Excel it asks me for password and if I type pass there, the workbook opens.
If the aim is encrypting an existing unencrypted workbook, then this would be as so:
import java.io.FileOutputStream;
import java.io.FileInputStream;
import org.apache.poi.hssf.record.crypto.Biff8EncryptionKey;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
public class EncryptHSSFExistingFile {
public static void main(String[] args) throws Exception {
try (HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream("Unencrypted.xls"));
FileOutputStream out = new FileOutputStream("Encrypted.xls") ) {
Biff8EncryptionKey.setCurrentUserPassword("pass");
workbook.write(out);
}
}
}
So same solution. Simply do Biff8EncryptionKey.setCurrentUserPassword before writing the HSSFWorkbook.
This code only creates correct encrypted workbooks for usage with Microsoft Excel. LibreOffice Calc is not able to open those files. So seems encrypting method used is unknown for LibreOffice Calc. But I have not found a way to change encrypting method for HSSF. So HSSF encryption seems not be fully provided in apache poi. Apache POI - Encryption support also not shows an example. So you are able opening and rewriting encrypted HSSFWorkbook. The new written workbook is encrypted too then if Biff8EncryptionKey.setCurrentUserPassword is not set null. But you cannot write an encrypted HSSFWorkbook from scratch.
I'm trying to write a Selenium code with JAVA for fetching input from excel using Apache POI. Below is the code, I'm getting the error message 'The method getWorkbook(FileInputStream) is undefined for the type Workbook' for the statement Workbook wb = Workbook.getWorkbook(fs); Please help me to sort this out.
public class Main {
public static void main(String[] args) {
File file = new File("C:/Users/425413/NewWorkspace/Telecom/datafile.properties");
FileInputStream fileInput = null;
try {
fileInput = new FileInputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
Properties prop = new Properties();
//load properties file
try {
prop.load(fileInput);
} catch (IOException e) {
e.printStackTrace();
}
System.setProperty("webdriver.chrome.driver","C:\\Users\\425413\\Documents\\Raji\\chromedriver_win32-for79\\chromedriver.exe");
WebDriver driver = new ChromeDriver();
driver.get(prop.getProperty("URL"));
String FilePath = "d://filepath.xls";
FileInputStream fs = new FileInputStream(FilePath);
Workbook wb = Workbook.getWorkbook(fs);
}
}
Try with
WorkbookFactory.create
I want to open a password protected docx file using Apache POI. Can anyone help me with the complete code please? Am not getting solution with this code
Exception in thread "main" org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. You are calling the part of POI that deals with OLE2 Office Documents. You need to call a different part of POI to process this data (eg XSSF instead of HSSF)
at org.apache.poi.poifs.storage.HeaderBlock.(HeaderBlock.java:126)
at org.apache.poi.poifs.storage.HeaderBlock.(HeaderBlock.java:113)
at org.apache.poi.poifs.filesystem.NPOIFSFileSystem.(NPOIFSFileSystem.java:301)
at org.apache.poi.hssf.usermodel.HSSFWorkbook.(HSSFWorkbook.java:413)
at org.apache.poi.hssf.usermodel.HSSFWorkbook.(HSSFWorkbook.java:394)
POIFSFileSystem fs=new POIFSFileSystem(new FileInputStream("D:/abc.docx"));
EncryptionInfo info=new EncryptionInfo(fs);
Decryptor decryptor=Decryptor.getInstance(info);
if(!decryptor.verifyPassword("user"))
{
throw new RuntimeException("document is encrypted");
}
InputStream in=decryptor.getDataStream(fs);
HSSFWorkbook wb=new HSSFWorkbook(in);
File f=new File("D:/abc5.docx");
wb.write(f);
The basic code for decryption the XML-based formats of Microsoft Office is shown in XML-based formats - Decryption.
But of course one must know that *.docx, which is a Word file in Office Open XML format, cannot be a HSSFWorkbook, which would be a Excel workbook in binary BIFF file format, but instead must be a XWPFDocument.
So:
import java.io.InputStream;
import java.io.FileInputStream;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
import org.apache.poi.xwpf.extractor.XWPFWordExtractor;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.poifs.crypt.EncryptionInfo;
import org.apache.poi.poifs.crypt.Decryptor;
import java.security.GeneralSecurityException;
public class ReadEncryptedXWPF {
static XWPFDocument decryptdocx(POIFSFileSystem filesystem, String password) throws Exception {
EncryptionInfo info = new EncryptionInfo(filesystem);
Decryptor d = Decryptor.getInstance(info);
try {
if (!d.verifyPassword(password)) {
throw new RuntimeException("Unable to process: document is encrypted");
}
InputStream dataStream = d.getDataStream(filesystem);
return new XWPFDocument(dataStream);
} catch (GeneralSecurityException ex) {
throw new RuntimeException("Unable to process encrypted document", ex);
}
}
public static void main(String[] args) throws Exception {
POIFSFileSystem filesystem = new POIFSFileSystem(new FileInputStream("abc.docx"));
XWPFDocument document = decryptdocx(filesystem, "user");
XWPFWordExtractor extractor = new XWPFWordExtractor(document);
System.out.println(extractor.getText());
extractor.close();
}
}
I have solved this. The code is below
POIFSFileSystem fs=new POIFSFileSystem(new FileInputStream("D:/abc.docx"));
EncryptionInfo info=new EncryptionInfo(fs);
Decryptor decryptor=Decryptor.getInstance(info);
XWPFDocument document=null;
if(decryptor.verifyPassword("password"))
{
InputStream dataStream = decryptor.getDataStream(fs);
document = new XWPFDocument(dataStream);
}else{
throw new Exception("file is protected with password...please open with right password");
}
File f=new File("D:/abc.docx");
FileOutputStream fos = new FileOutputStream(f);
document.write(fos);
document.close();
I want to write a String into an existing Excel file cell using Java and apache library poi. Here is my method:
public void setSuccessMessageInExcellFile(File uploadFile, HttpServletResponse response) {
try {
FileInputStream fileInputStream = new FileInputStream(uploadFile);
HSSFWorkbook workbook = new HSSFWorkbook(fileInputStream);
HSSFSheet excelSheet = workbook.getSheetAt(0);
HSSFCell cell = excelSheet.getRow(0).getCell(0);
cell.setCellValue("Imported");
fileInputStream.close();
FileOutputStream out = new FileOutputStream(uploadFile);
workbook.write(out);
out.close();
} catch(Exception ex) {
ex.getCause().printStackTrace();
}
}
there is no error but "Imported" text is not available in my Excel file.
Be sure that your file exists, writable and has the right Excel version. After that you should change your code like that, because you are getting a NullPointerException otherwise:
public void setSuccessMessageInExcellFile(File uploadFile, HttpServletResponse response) {
try {
FileInputStream fileInputStream = new FileInputStream(uploadFile);
HSSFWorkbook workbook = new HSSFWorkbook(fileInputStream);
HSSFSheet excelSheet = workbook.getSheetAt(0);
HSSFCell cell = excelSheet.createRow(0).createCell(0);
cell.setCellValue("Imported");
fileInputStream.close();
FileOutputStream out = new FileOutputStream(uploadFile);
workbook.write(out);
out.close();
} catch(Exception ex) {
ex.getCause().printStackTrace();
}
}
And better would be putting the closables in the try as argument like that:
try(FileInputStream fileInputStream = new FileInputStream(uploadFile);
HSSFWorkbook workbook = new HSSFWorkbook(fileInputStream);
FileOutputStream out = new FileOutputStream(uploadFile)) {
HSSFSheet excelSheet = workbook.getSheetAt(0);
HSSFCell cell = excelSheet.createRow(0).createCell(0);
cell.setCellValue("Imported");
workbook.write(out);
} catch(Exception ex) {
ex.getCause().printStackTrace();
}
I am new to Java programming. My current project requires me to read embedded(ole) files in an excel sheet and get text contents in them. Examples for reading embedded word file worked fine, however I am unable to find help reading an embedded pdf file. Tried few things by looking at similar examples.... which didn't work out.
http://poi.apache.org/spreadsheet/quick-guide.html#Embedded
I have code below, probably with help I can get in right direction. I have used Apache POI to read embedded files in excel and pdfbox to parse pdf data.
public class ReadExcel1 {
public static void main(String[] args) {
try {
FileInputStream file = new FileInputStream(new File("C:\\test.xls"));
POIFSFileSystem fs = new POIFSFileSystem(file);
HSSFWorkbook workbook = new HSSFWorkbook(fs);
for (HSSFObjectData obj : workbook.getAllEmbeddedObjects()) {
String oleName = obj.getOLE2ClassName();
if(oleName.equals("Acrobat Document")){
System.out.println("Acrobat reader document");
try{
DirectoryNode dn = (DirectoryNode) obj.getDirectory();
for (Iterator<Entry> entries = dn.getEntries(); entries.hasNext();) {
DocumentEntry nativeEntry = (DocumentEntry) dn.getEntry("CONTENTS");
byte[] data = new byte[nativeEntry.getSize()];
ByteArrayInputStream bao= new ByteArrayInputStream(data);
PDFParser pdfparser = new PDFParser(bao);
pdfparser.parse();
COSDocument cosDoc = pdfparser.getDocument();
PDFTextStripper pdfStripper = new PDFTextStripper();
PDDocument pdDoc = new PDDocument(cosDoc);
pdfStripper.setStartPage(1);
pdfStripper.setEndPage(2);
System.out.println("Text from the pdf "+pdfStripper.getText(pdDoc));
}
}catch(Exception e){
System.out.println("Error reading "+ e.getMessage());
}finally{
System.out.println("Finally ");
}
}else{
System.out.println("nothing ");
}
}
file.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Below is the output in eclipse
Acrobat reader document
Error reading Error: End-of-File, expected line
Finally
nothing
The PDF weren't OLE 1.0 packaged, but somehow differently embedded - at least the extraction worked for me.
This is not a general solution, because it depends on how the embedding application names the entries ... of course for PDFs you could check all DocumentNode-s for the magic number "%PDF" - and in case of OLE 1.0 packaged elements this needs to be done differently ...
I think, the real filename of the pdf is somewhere hidden in the \1Ole or CompObj entries, but for the example and apparently for your use case that's not necessary to determine.
import java.io.*;
import java.net.URL;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.poifs.filesystem.*;
import org.apache.poi.util.IOUtils;
public class EmbeddedPdfInExcel {
public static void main(String[] args) throws Exception {
NPOIFSFileSystem fs = new NPOIFSFileSystem(new URL("http://jamesshaji.com/sample.xls").openStream());
HSSFWorkbook wb = new HSSFWorkbook(fs.getRoot(), true);
for (HSSFObjectData obj : wb.getAllEmbeddedObjects()) {
String oleName = obj.getOLE2ClassName();
DirectoryNode dn = (DirectoryNode)obj.getDirectory();
if(oleName.contains("Acro") && dn.hasEntry("CONTENTS")){
InputStream is = dn.createDocumentInputStream("CONTENTS");
FileOutputStream fos = new FileOutputStream(obj.getDirectory().getName()+".pdf");
IOUtils.copy(is, fos);
fos.close();
is.close();
}
}
fs.close();
}
}