Develop Reference

How to read cells from xlsx

I need to read cells from XLSX. I use Apache POI, but I don't know what the mistake is.
This is my code:
import java.io.IOException;
import java.io.FileNotFoundException;
import java.io.*;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
public class miniwolfi {
public static void main(String[] args) throws IOException {
File excel = new File("/tmp/table.xlsx");
FileInputStream fis = new FileInputStream(excel);
XSSFWorkbook wb = new XSSFWorkbook(fis);
double result = wb.getSheetAt(0).getRow(0).getCell(0).getNumericCellValue();
System.out.println(result);
fis.close();
}
}
And the error
java.io.FileNotFoundException: /tmp/таблица.xlsx (No such file or directory)
at java.base/java.io.FileInputStream.open0(Native Method)
at java.base/java.io.FileInputStream.open(FileInputStream.java:219)
at java.base/java.io.FileInputStream.<init>(FileInputStream.java:157)
at miniwolfi.main(miniwolfi.java:17)
Maybe mistake is the way to XLSX. How can I fix this?

Check if the file is xlsx or xls files first, and you have permissions,
Your error is the file is not found
I would write it as follow and use try-with-resources
File excel = new File("/tmp/table.xlsx");
try(FileInputStream fis = new FileInputStream(excel);){
XSSFWorkbook wb = new XSSFWorkbook(fis);
double result = wb.getSheetAt(0).getRow(0).getCell(0).getNumericCellValue();
System.out.println(result);
}

Changing the getROW index in apachee POI throw NullPointerException

I am trying to write to Excel using apachee POI. It works when the getrow index is 0 like[getrow(o)]. But changing it other than zero throw nullpointer exception.
package fairfoxchecking;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class writingInExcel {
public static void main(String []args) throws IOException {
File src = new File("D:/Etl_Bug_reporting_Template.xlsx");
FileInputStream fis = new FileInputStream(src);
XSSFWorkbook wb = new XSSFWorkbook(fis);
XSSFSheet sheet1 =wb.getSheetAt(0);
sheet1.getRow(0).createCell(5).setCellValue("cheasdfasdfasck1");
sheet1.getRow(1).createCell(5).setCellValue("cheasdfasdfasck1");
FileOutputStream fout = new FileOutputStream(src);
wb.write(fout);
wb.close();
}

Before you do create a cell, you have to ensure the row is created.
Try something like,
if(sheet1.getRow(rowIndex) == null)
sheeet1.createRow(rowIndex)
sheet1.getRow(rowIndex).createCell(colIndex).setCellValue(stringVal);

As per this , getRow might return null if it is not defined. So you might have to create one before writing.
sheet1.createRow(index)
Check this lib - seems to be nice.

Newline characters are getting converted into space in MicrosoftWord while performing MailMerge using Java

While performing mail merge using Java, new line characters are converted into space in Microsoft Word.So line breaks are lost after merge.Need to retain the line breaks in the text in MicrosoftWord after the merge is done.
Java code to perform mailmerge using IXDocReport:
package sample;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import fr.opensagres.xdocreport.document.IXDocReport;
import fr.opensagres.xdocreport.document.registry.XDocReportRegistry;
import fr.opensagres.xdocreport.template.IContext;
import fr.opensagres.xdocreport.template.TemplateEngineKind;
public class Sample {
public static void main(String[] args) throws Exception{
// 1) Load ODT file and set Velocity template engine and cache it to the registry
InputStream in= new FileInputStream(new File("sample.docx"));
IXDocReport report = XDocReportRegistry.getRegistry().loadReport(in, TemplateEngineKind.Velocity);
// 2) Create Java model context
IContext context = report.createContext();
context.put("name", "new \n world");
// 3) Generate report by merging Java model with the ODT
OutputStream out = new FileOutputStream(new File("ODTHelloWordWithVelocity_Out.docx"));
report.process(context, out);
}
}

error while reading .xlsm file

I am trying to read a .xlsm file using POI.
My code is:
import java.io.*;
import java.util.List;
import jxl.*;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.read.biff.BiffException;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.xssf.usermodel.*;;
public class ReadExcelSheet {
public static void main(String[] args) throws IOException {
final Workbook wb;
FileInputStream fileIn = new FileInputStream("C:\\Users\\my\\Desktop\\ExcelPORead\\Purchace.xlsm");
wb = WorkbookFactory.create(fileIn); // Error in this line
}
}
and I am getting an error at the line "wb = WorkbookFactory.create(fileIn)", it says to "configure Build Path".
I am using Eclipse and downloaded poi-ooxml-3.5-beta5.jar and add it to the Build path.
But I am not getting what I need to do to make it working.
Kindly suggest me how to remove this error or If you have any better way to read the .xlsm files in Java.
Thanks for your response.
Regards,
Raman

Reading MS Word 2007 using Java

I am trying to read a Microsoft word file through Java. I have included all the .jar files from Apache poi-3.8-beta1 to my classpath. However, when I try running this, I get the following exception:
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.<init>(HeaderBlock.java:131)
at org.apache.poi.poifs.storage.HeaderBlock.<init>(HeaderBlock.java:104)
at org.apache.poi.poifs.filesystem.POIFSFileSystem.<init>(POIFSFileSystem.java:138)
at readingmsword07.Main.main(Main.java:27)
Following is my code:
import org.apache.poi.xwpf.extractor.XWPFWordExtractor;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.*;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.xwpf.usermodel.XWPFDocument;
public class Main {
public static void main(String[] args) {
try {
FileInputStream fis = new FileInputStream("C:\\TrialDoc.docx");
POIFSFileSystem fileSystem = new POIFSFileSystem(fis);
org.apache.poi.xwpf.extractor.XWPFWordExtractor oleTextExtractor =
new XWPFWordExtractor(new XWPFDocument(fis));
System.out.print(oleTextExtractor.getText());
} catch (Exception e) {
e.printStackTrace();
}
}
}
I am using the XWPFWordExtractor since I am trying to read a 2007 word document but for some reason I am unable to figure out the right POI that deals with this.
Any help is much appreciated. Thanks in advance!
~ Woods

remove the line,
POIFSFileSystem fileSystem = new POIFSFileSystem(fis);