java 如何在itext中将页面大小设置为欧洲A4
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How set page size to European A4 in itext
提问by Mehul
I am using the following code to merge pdf. But it is giving me a margin problem. It is leaving more margin on top, left & bottom & less margin in right then the original document. i tried to set margins also but it did not work. please help me out with this or can u help me set page size to European A4
我正在使用以下代码合并 pdf。但它给了我一个保证金问题。与原始文档相比，它在顶部、左侧和底部留下了更多的边距，而在右侧留下了更少的边距。我也尝试设置边距，但没有用。请帮我解决这个问题，或者你能帮我将页面大小设置为欧洲 A4
public class Pdf_Merge {
public static void main(String[] args) {
try {
List<InputStream> pdfs = new ArrayList<InputStream>();
pdfs.add(new FileInputStream("file1.pdf"));
pdfs.add(new FileInputStream("file2.pdf"));
OutputStream output = new FileOutputStream("Output_file.pdf");
System.out.println("Created");
Pdf_Merge.concatPDFs(pdfs, output, true);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void concatPDFs(List<InputStream> streamOfPDFFiles, OutputStream
outputStream, boolean paginate) {
Document document = new Document(PageSize.A4);
try {
List<InputStream> pdfs = streamOfPDFFiles;
List<PdfReader> readers = new ArrayList<PdfReader>();
int totalPages = 0;
Iterator<InputStream> iteratorPDFs = pdfs.iterator();
// Create Readers for the pdfs.
while (iteratorPDFs.hasNext()) {
InputStream pdf = iteratorPDFs.next();
PdfReader pdfReader = new PdfReader(pdf);
readers.add(pdfReader);
totalPages += pdfReader.getNumberOfPages();
}
// Create a writer for the outputstream
PdfWriter writer = PdfWriter.getInstance(document, outputStream);
document.open();
PdfContentByte cb = writer.getDirectContent(); // Holds the PDF
// data
PdfImportedPage page;
int currentPageNumber = 0;
int pageOfCurrentReaderPDF = 0;
Iterator<PdfReader> iteratorPDFReader = readers.iterator();
// Loop through the PDF files and add to the output.
while (iteratorPDFReader.hasNext()) {
PdfReader pdfReader = iteratorPDFReader.next();
// Create a new page in the target for each source page.
while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {
document.newPage();
pageOfCurrentReaderPDF++;
currentPageNumber++;
page = writer.getImportedPage(pdfReader, pageOfCurrentReaderPDF);
cb.addTemplate(page, 0, 0);
// Code for pagination.
if (paginate) {
cb.beginText();
cb.endText();
}
}
pageOfCurrentReaderPDF = 0;
}
outputStream.flush();
document.close();
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (document.isOpen())
document.close();
try {
if (outputStream != null)
outputStream.close();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
}
回答by Luixv
import com.lowagie.text.PageSize;
...
final Document document = new Document(PageSize.A4);
