I'm reading a file, adding some data to paragraphs, and then writing out a document another file.
The problem I'm facing is that the output file is unreadable, I can't open it, and if a binary open it I can see that it don't have the correct format.
Every character has a ? character at the left side.
Can you give me some advice about what is happening?
Wrong output
Correct output
EDIT: Code Save function
FileOutputStream out = null;
try {
// Add true to make the data append possible in output stream.
out = new FileOutputStream(filePath, true);
doc.write(out);
out.flush();
} catch (Exception ex) {
ex.printStackTrace();
} finally {
out.close();
}
Edit file:
File file = new File("muestra.doc");
FileInputStream fis = new FileInputStream(file.getAbsolutePath());
POIFSFileSystem fs = new POIFSFileSystem(fis);
HWPFDocument document = new HWPFDocument(fs);
Range range = document.getRange();
for (int i = 0; i < document.getParagraphTable().getParagraphs().size(); i++) {
Paragraph p = range.getParagraph(i);
p.insertBefore("£");
}
Related
I am writing to an existing excel file using Java, say this is fileA. (I'm using APACHE POI for this.)
It is possible that the excel fileA is opened by someone. It is saved in a shared folder accessed by a lot of people.
I want to avoid encountering
java.io.FileNotFoundException: (The process cannot access the file
because it is being used by another process)
Because no matter if the existing excel file is opened or not, I need to save the output of my Java app.
Upon researching, I think it is impossible to close fileA (opened by some other process/user, not by my Java App) within my Java code.
What I'm doing now is to create a new excel file, say fileB if fileA is currently opened. I'm using the code below.
File file = null;
FileOutputStream out = null;
int workbookNo = 0;
do{
String append = "";
if(workbookNo != 0){
append = "_Copy" + Integer.toString(workbookNo);
}
file = new File(filePath + "ValidateLock_" + dataDate + append + ".xlsx");
try{
out = new FileOutputStream(file);
workbookNo = 0;
}catch(FileNotFoundException e){
//e.printStackTrace();
workbookNo++;
}
}while(workbookNo != 0);
However, I'm getting the error below.
org.apache.poi.openxml4j.exceptions.NotOfficeXmlFileException: No
valid entries or contents found, this is not a valid OOXML (Office
Open XML) file
try like this :
try {
FileInputStream file = new FileInputStream(new File("C:\\update.xls"));
HSSFWorkbook workbook = new HSSFWorkbook(file);
HSSFSheet sheet = workbook.getSheetAt(0);
Cell cell = null;
//Update the value of cell
cell = sheet.getRow(1).getCell(2);
cell.setCellValue(cell.getNumericCellValue() * 2);
cell = sheet.getRow(2).getCell(2);
cell.setCellValue(cell.getNumericCellValue() * 2);
cell = sheet.getRow(3).getCell(2);
cell.setCellValue(cell.getNumericCellValue() * 2);
//Close the excel input file (inputstream)
file.close();
FileOutputStream outFile =new FileOutputStream(new File("C:\\update.xls"));
workbook.write(outFile);
//Close output excel file
outFile.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
I am trying to check if my excel file already exists. If it doesn't exists, I want to create a new one and if it exists I will delete it and create a new one. I wrote following program but I am getting error at line - workbook= WorkbookFactory.create(instream);
The error is->
java.lang.IllegalArgumentException: Your InputStream was neither an OLE2 stream, nor an OOXML stream
at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:89)
at tryIng.main(tryIng.java:84)
Here is a program ->
try {
String filePath= "C:/Users/pritik/Desktop/t1.xlsx";
File file = new File(filePath);
filePath= file.getAbsolutePath();
xlFile = new File(filePath);
if(xlFile.exists() && !xlFile.isDirectory())
xlFile.delete(); //delete if file already exists.
xlFile.createNewFile();
inStream = new FileInputStream(xlFile);
workbook = WorkbookFactory.create(inStream); // I get error at this line
String sheetName="NewSheet";
Sheet sheet = workbook.createSheet(sheetName);
FileOutputStream fOut = new FileOutputStream(xlFile);
int i,j;
xRows = xTS.length;
xCols = xTS[0].length;
for(i =0;i<xRows;i++)
{
row = sheet.createRow(i);
for(j=0;j<xCols;j++)
{
cell = row.createCell(j);
cell.setCellType(Cell.CELL_TYPE_STRING);
cell.setCellValue(xTS[i][j]);
}
}
workbook.write(fOut);
fOut.flush();
fOut.close();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Don't create an empty file and try to read it, that won't work. An empty zero byte file is not valid, and can't be loaded Instead, have POI create an new file for you, which you will write later.
Change the code:
if(xlFile.exists() && !xlFile.isDirectory())
xlFile.delete(); //delete if file already exists.
xlFile.createNewFile();
inStream = new FileInputStream(xlFile);
workbook = WorkbookFactory.create(inStream);
To instead be:
if(xlFile.exists() && !xlFile.isDirectory())
xlFile.delete(); //delete if file already exists.
if (xlFile.toString().endsWith(".xls") {
workbook = new HSSFWorkbook();
} else {
workbook = new XSSFWorkbook();
}
Also, if you do want to read an existing file, don't use a stream if you have a file! See this bit of the POI docs for why not.
I am using POI to delete "enter" in a .doc file (Blank line).
My code below works correctly when the input file is not large (for example, less than 1MB). However, when I deal with large input.doc that is 4mb, the output.doc is not correctly generated. I can not open the file.
Does anyone have better idea to write the big file correctly? Or, is there any other java code that can delete "enter" in a big .doc file? Thank you very much.
package mydoc;
import org.apache.poi.poifs.filesystem.*;
import org.apache.poi.hwpf.*;
import org.apache.poi.hwpf.usermodel.*;
import java.io.*;
public class test {
/*The ASCII of "Enter" is 13*/
private static final short ENTER_ASCII = 13;
public static void main(String[] args){
/* the location of the input file */
String fileName = "D:\\input.doc";
deleteEnter(fileName);
}
public static void deleteEnter(String fileName){
POIFSFileSystem fs = null;
try{
fs = new POIFSFileSystem(new FileInputStream(fileName));
HWPFDocument doc = new HWPFDocument(fs);
Range range = doc.getRange();
for (int i = 0; i < range.numParagraphs(); i++)
{
if (range.getParagraph(i).text().toCharArray()[0]==ENTER_ASCII)
{
range.getParagraph(i).delete();
}
}
FileOutputStream fos = null;
fos = new FileOutputStream(new File("D:\\output.doc"));
doc.write(fos);
fos.flush();
fos.close();
}//end try
catch (Exception e){
e.printStackTrace();
}//end catch
}
}
Depending on your needs you could even use a macro;
You should even be able to use regex like this: "^13{2,}", but that didn't work for me in Word 2010, see http://social.msdn.microsoft.com/Forums/en-US/0d921f97-b59a-48a9-a01a-20fe72f21c19/how-to-remove-blank-lines-?forum=worddev
Sub RemoveBlankLines()
Selection.Find.ClearFormatting
Selection.Find.Replacement.ClearFormatting
With Selection.Find
.Text = "^p^p"
.Replacement.Text = "^p"
.MatchWildcards = False
End With
Selection.Find.Execute Replace:=wdReplaceAll
End Sub
Sub RemoveEnters()
Selection.Find.ClearFormatting
Selection.Find.Replacement.ClearFormatting
With Selection.Find
'^11 or ^l New line
.Text = "^l"
.Replacement.Text = ""
End With
Selection.Find.Execute Replace:=wdReplaceAll
With Selection.Find
'^13 or ^p Carriage return/paragraph mark
.Text = "^p"
.Replacement.Text = ""
End With
Selection.Find.Execute Replace:=wdReplaceAll
End Sub
"enter" is the line separator right ? It's platform dependant so I propose the above solution :
String separator = System.getProperty("line.separator")
file = new File(filename);
FileInputStream fis=new FileInputStream(file.getAbsolutePath());
HWPFDocument document=new HWPFDocument(fis);
extractor = new WordExtractor(document);
String [] fileData = extractor.getParagraphText();
for(int i=0;i<fileData.length;i++){
if(fileData[i] != null)
fileData[i] = fileData[i].replace(separator,"");
}
And then you just have to output fileData in a clean doc file.
I'm trying to delete a PDF file after printing. The PDF is generated using JAVA code and needs to be deleted after the printing process is carried out. However, I am facing an issue while deleting the file. I can't seem to figure out what the problem is.
The error shown while trying to delete the file from its folder is:
"File in Use: The Action can't be completed because the file is open in Java(TM) Platform SE Binary."
The code I've used is as follows:
public String actionPrintReport() {
try {
// Creates a new document object
Document document = new Document(PageSize.LETTER);
File file = new File(fileLocation.concat("\\".concat(fileName)));
FileOutputStream fo = new FileOutputStream(file);
// Creates a pdfWriter object for the FILE
PdfWriter pdfWriter = PdfWriter.getInstance(document, fo);
// Open the document
document.open();
// Add meta data...
// Insert Data...
// Close the document
document.close();
// Create a PDFFile from a File reference
FileInputStream fis = new FileInputStream(file);
FileChannel fc = fis.getChannel();
ByteBuffer bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size());
PDFFile pdfFile = new PDFFile(bb);
// Create PDF Print Page
PDFPrintPage pages = new PDFPrintPage(pdfFile);
// Create Print Job...
// Close
fo.flush();
fo.close();
fis.close();
if (file.exists()) {
if (file.delete()) {
String check = "yes";
} else {
String check = "no";
}
}
// Send print job to default printer
pjob.print();
actionMsg = "success";
return SUCCESS;
} catch (Exception e) {
e.printStackTrace();
}
return ERROR;
}
why not put the deletion in a finally block?
} catch (Exception e) {
e.printStackTrace();
} finally {
if (file.exists()) {
file.delete();
}
}
After discussion with the OP, an approach was investigated to use Apache FileCleaningTracker whereby the File is tracked and then deleted after a Monitored Object has been GC'd.
I need a little help here with my PDF converter program.
So, I'm doing this mobile agent PDF converter using JADE framework. But, the problem that I am facing is more related to the way I convert a text file into PDF, send it across network as binary and restore PDF file back.
The program that I've written works properly on my MacBook.
But, on a Windows, it restores my PDF file as an empty PDF.
Here is my code that I use for sending the PDF file across.
private void sendPDF(File f, String recipient) {
String content = "";
if(f != null) {
try {
FileInputStream fis = new FileInputStream(f);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int noBytesRead = 0;
byte[] buffer = new byte[1024];
while((noBytesRead = fis.read(buffer)) != -1) {
baos.write(buffer, 0, noBytesRead);
}
content = baos.toString();
fis.close();
baos.close();
System.out.println("Successful PDF-to-byte conversion.");
} catch (Exception e) {
System.out.println("Exception while converting PDF-to-byte.");
content = "failed";
e.printStackTrace();
}
} else {
System.out.println("PDF-to-file conversion failed.");
content = "failed";
}
ACLMessage message = new ACLMessage(ACLMessage.INFORM);
message.addReceiver(new AID(recipient, AID.ISLOCALNAME));
message.setContent(content);
myAgent.send(message);
System.out.println("PDF document has been sent to requesting client.");
}
And, here is the code that I use to restore the PDF back.
private File restorePDF(String content) {
String dirPDF = dirBuffer + "/" + new Date().getTime() + ".pdf";
File f = new File(dirPDF);
try {
if(!f.exists()) f.createNewFile();
byte[] buffer = new byte[1024];
ByteArrayInputStream bais = new ByteArrayInputStream(content.getBytes());
FileOutputStream fos = new FileOutputStream(f);
int noBytesRead = 0;
while((noBytesRead = bais.read(buffer)) != -1) {
fos.write(buffer, 0, noBytesRead);
}
fos.flush();
fos.close();
bais.close();
} catch (Exception e) {
e.printStackTrace();
f = null;
}
return f;
}
Any help on this would be much appreciated! :)
Question is a little bit confusing, since there is nothing specific about PDF content.
I am supposing you actually want to send bytes, actually send a string, and the string encoding is different on the client and server.
This is usually where troubles happen:
content = baos.toString();
and:
content.getBytes()
A PDF file is a binary file format with lookup tables and lots of binary data blocks to making it a String will break it. If you want to know about the insides of a PDF file, I have written a whole load of blog posts about it (http://www.jpedal.org/PDFblog/2010/09/understanding-the-pdf-file-format-series/)
One issue is that you're using the wrong separator char. Java has a built in function that will return the correct char for the correct os. See separator char.
Your code will look something like this
String dirPDF = dirBuffer + File.separatorChar + new Date().getTime() + ".pdf";
For reference:
separatorChar
The system-dependent default name-separator character. This field is
initialized to contain the first character of the value of the system
property file.separator. On UNIX systems the value of this field is
'/'; on Microsoft Windows systems it is '\'.