Just create one row for each header, and populate the first cell in each!
Something like:
String[] headers = new String[] { "Header1", "Header2", "Header3" };
Workbook workbook = new HSSFWorkbook();
Sheet sheet = workbook.createSheet("EDR Raw Data");
for (int rn=0; rn<headers.length; rn++) {
Row r = sheet.createRow(rn);
r.createCell(0).setCellValue(headers[rn]);
}
Then when populating your data, do sheet.getRow(rownumber) to get the existing row, and populate the remaining cells of interest in it
Stack Overflow
stackoverflow.com › questions › 15563770 › how-to-add-header-row-in-text-file-using-java
How to Add header row in text file using java - Stack Overflow
May 22, 2017 - Copytry{ BufferedReader in = new BufferedReader(new FileReader(yourFile)); String header = "Your Header"; String content = ""; while (in.ready()) { content += in.readLine(); } in.close(); String output = header + System.getProperty("line.separator") + content; FileWriter fstream = new FileWriter(YourOutputFile); BufferedWriter out = new BufferedWriter(fstream); out.write(output); out.close(); }catch (IOException e){ System.err.println("Error: " + e.getMessage()); }
Blogger
bredesonbredeson.blogspot.com › 2015 › 07 › how-to-add-header-row-in-text-file.html
How to Add header row in text file using java -
December 8, 2017 - I need to add a header row to an existing text file, without any other file format affecting any way to do this Or structure Read ...
Java, write to file with headings - Stack Overflow
I have this method that takes one String and writes it to a file. I set the PrintWriter to true because I want to save all the data that is written to it. I want to have headings on this file. How... More on stackoverflow.com
How to add header column in excel using Java Apache POI? - Stack Overflow
I am writing a java program in which I have to take data from XML file and put it into excel file. While doing this I have to create row headers and add data accordingly. I know how to create col... More on stackoverflow.com
Add a Header to the Beginning of Each Page in a Text File in Java - Stack Overflow
I am trying to add a header to the beginning of each page in Java. I am printing my console output to a file as well. All of the examples I can find are for PDF files but I need to print to a text ... More on stackoverflow.com
Writing in the beginning of a text file Java - Stack Overflow
I need to write something into a text file's beginning. I have a text file with content and i want write something before this content. Say i have; Good afternoon sir,how are you today? I'm fin... More on stackoverflow.com
YouTube
youtube.com › watch
How to Add Headers to a CSV/Text File Using Java - YouTube
How to Add Headers to a CSV/Text File Using JavaGreetings, in this Java tutorial we shall be looking at how to add a header or headers to a csv or a text bas...
Published July 4, 2023
Oracle Community
community.oracle.com › tech › developers › discussion › 2196417 › how-to-add-header-and-fooder-in-text-file
Developer Community - Oracle Forums
March 22, 2011 - What is Oracle Forums? A place where you can connect, learn and explore. Whether you are a product manager, marketing manager, or general tech enthusiast, we welcome you. In Oracle Forums, you can cre...
Stack Overflow
stackoverflow.com › questions › 30010633 › java-write-to-file-with-headings
Java, write to file with headings - Stack Overflow
2. If the file is first time accessed then you can add a header - ... public static void writeToFile(String text) { String heading = "Some heading"; try { File f = new File("test.txt"); FileWriter writer = new FileWriter(f, true); if(f.exists() ...
Stack Overflow
stackoverflow.com › questions › 49961160 › add-a-header-to-the-beginning-of-each-page-in-a-text-file-in-java
Add a Header to the Beginning of Each Page in a Text File in Java - Stack Overflow
public class PagePrinter { private final PrintStream printer; private final int pageWidth; private final int pageLength; private int currWidth = 0; private int currLine = 0; private int currPage = 1; private boolean inPageHeader = false; /** * @param printer * - print stream to print to * @param pageWidth * - in characters * @param pageLength * - in lines, includes the length of the header */ public PagePrinter(PrintStream printer, int pageWidth, int pageLength) { this.printer = printer; this.pageLength = pageLength; this.pageWidth = pageWidth; } public void print(String str) { // replace tabs
e-iceblue
e-iceblue.com › Tutorials › Java › Spire.Doc-for-Java › Program-Guide › Header-and-Footer › Insert-Header-and-Footer-to-Word-in-Java.html
Java: Insert Headers and Footers into Word Documents
import com.spire.doc.*; import ... Section section = document.getSections().get(0); //Call the custom method insertHeaderAndFooter() to insert headers and footers to the section insertHeaderAndFooter(section); //Save the document document.saveToFile("HeaderAndFooter.docx", ...
Top answer 1 of 7
27
You can't really modify it that way - file systems don't generally let you insert data in arbitrary locations - but you can:
- Create a new file
- Write the prefix to it
- Copy the data from the old file to the new file
- Move the old file to a backup location
- Move the new file to the old file's location
- Optionally delete the old backup file
2 of 7
17
Just in case it will be useful for someone here is full source code of method to prepend lines to a file using Apache Commons IO library. The code does not read whole file into memory, so will work on files of any size.
public static void prependPrefix(File input, String prefix) throws IOException {
LineIterator li = FileUtils.lineIterator(input);
File tempFile = File.createTempFile("prependPrefix", ".tmp");
BufferedWriter w = new BufferedWriter(new FileWriter(tempFile));
try {
w.write(prefix);
while (li.hasNext()) {
w.write(li.next());
w.write("\n");
}
} finally {
IOUtils.closeQuietly(w);
LineIterator.closeQuietly(li);
}
FileUtils.deleteQuietly(input);
FileUtils.moveFile(tempFile, input);
}
Medium
medium.com › @andrewwil › insert-header-and-footer-to-word-using-java-d8c53b6a03eb
Insert Header and Footer to Word using Java | by Andrew Wilson | Medium
April 21, 2021 - import com.spire.doc.*; import ... = document.getSections().get(0); //Call insertHeaderAndFooter method to add header and footer to the section insertHeaderAndFooter(section); //Save to file document.saveToFile("out/H...
Stack Overflow
stackoverflow.com › questions › 28962426 › best-way-to-insert-headers-while-writing-file-in-java
Best way to insert headers while writing file in java - Stack Overflow
String header="<%@ jet package"+"="+"\"Testmodule\"" +"\n"+"imports"+"="+"\"java.io.File"+"\n"+ "utils.ProjectUtils"+"\n" +"\""+" parallel="+"\"true\""+"%>"+"\n"; Note: I have more than 10 imports.This is just sample. since the text is more and requires also proper alignment(like each import on next line and also escape "") when i am inserting header into other file, I want to know if there are any alternatives to do this in efficient way in java.
Stack Overflow
stackoverflow.com › questions › 26838145 › set-format-of-header-row-using-itext
java - set format of header row using iText - Stack Overflow
The only difference, is that you want the text in the header to be bold. This requires only a minimal change to the code: public void createPdf(String dest) throws IOException, DocumentException { Document document = new Document(PageSize.A4.rotate()); PdfWriter.getInstance(document, new FileOutputStream(dest)); document.open(); PdfPTable table = new PdfPTable(9); table.setWidthPercentage(100); table.setWidths(new int[]{4, 1, 3, 4, 3, 3, 3, 3, 1}); BufferedReader br = new BufferedReader(new FileReader(DATA)); String line = br.readLine(); process(table, line, new Font(FontFamily.HELVETICA, 16,
DEV Community
dev.to › codesharing › insert-header-and-footer-to-word-using-java-2lc8
Insert Header and Footer to Word using Java - DEV Community
January 7, 2021 - import com.spire.doc.*; import ... = document.getSections().get(0); //Call insertHeaderAndFooter method to add header and footer to the section insertHeaderAndFooter(section); //Save to file document.saveToFile("out/H...
Coderanch
coderanch.com › t › 691758 › java › Write-header-CSV-file
[Write header for .CSV file] [Solved] (Java in General forum at Coderanch)
March 15, 2018 - This is what I found with the output file in a text editor: Book Name,Author What the dog saw,Malcolm Gladwell Cosmos,Carl Sagan Hobbit,J.R.R. Tolkien · SCJP 5, OCPJP 7, 8, SCJD 5, SCWCD 4, SCBCD 5, SCJWS 4, IBM OOAD 833 & 834, MongoDB Developer ... Thank you, My problem was solved! ... The first line of CSV is header line without using any library. Here is some code with Java SE API: This creates a file with name "MyCsvFile.csv" and it can be opened with a text editor like Windows Notepad or using a spreadsheet program like Microsoft Excel.
Oracle
forums.oracle.com › ords › apexds › post › how-to-add-a-header-to-all-java-files-0136
How to add a header to all .java files? - Oracle Forums
October 22, 2003 - Hi all, I want to add a specific header in all my .java files (Interfaces, Classes). Does JDeveloper support that I can specify a header or filename with a header text which is added each time I crea...
Alvin Alexander
alvinalexander.com › java › jwarehouse › netbeans-src › mdr › src › org › netbeans › mdr › persistence › btreeimpl › btreestorage › FileHeader.java.shtml
Java example - FileHeader.java
This file is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM · Copyright 1998-2024 Alvin Alexander, alvinalexander.com All Rights Reserved. A percentage of advertising revenue from pages under the ...
UiPath Community
forum.uipath.com › help › activities
How to insert an header row into a .Txt file - Activities - UiPath Community Forum
October 10, 2023 - This is my text file a;23;k; b;100;C; c;11;D; However, I want to add a header to the text file, so it looks like this $E123;my new cat;B;22AA2; a;23;k; b;100;C; c;11;D; The use case in Combine txt files keeping ...
Aspose
docs.aspose.com › words › java › working-with-headers-and-footers
Working with Headers and Footers in Java|Aspose.Words for Java
Call builder.moveToHeaderFooter(section.getHeadersFooters().getByHeaderFooterType(HeaderFooterType.HEADER_PRIMARY)). After moving, you can insert text, images, or fields. Q: How can I remove only the footers (or only the headers) from every ...