[英]How to solve this iText PDF error?
我正在使用iText PDF合並兩個pdf頁面(test1.pdf和test2.pdf),並在test_result.pdf中得到輸出。 但是輸出頁面的顯示效果不如輸入頁面,而是被裁剪為實際大小的一半。 如何克服這個錯誤? 這是我的代碼:
public class MergePDF {
public static void main(String[] args) {
try {
List<InputStream> pdfs = new ArrayList<InputStream>();
pdfs.add(new FileInputStream("test1.pdf"));
pdfs.add(new FileInputStream("test2.pdf/"));
// pdfs.add(new FileInputStream("test_result.pdf/"));
OutputStream output = new FileOutputStream("/home/ant000112/merge_result.pdf");
MergePDF.concatPDFs(pdfs, output, true);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void concatPDFs(List<InputStream> streamOfPDFFiles,
OutputStream outputStream, boolean paginate) {
Document document = new Document();
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();
//BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA,BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA,BaseFont.CP1257, BaseFont.NOT_EMBEDDED);
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.setFontAndSize(bf, 9);
cb.showTextAligned(PdfContentByte.ALIGN_CENTER, ""+ currentPageNumber + " of " + totalPages, 520,5, 0);
cb.endText();
}
}
pageOfCurrentReaderPDF = 0;
}
outputStream.flush();
document.close();
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (document.isOpen())
document.close();
System.out.println("ghghklh");
try {
if (outputStream != null)
outputStream.close();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
您是否嘗試從iText網站閱讀示例? 看來您正在以不同的方式進行操作。 就像您沒有使用PdfCopy
。
/*
* This class is part of the book "iText in Action - 2nd Edition"
* written by Bruno Lowagie (ISBN: 9781935182610)
* For more info, go to: http://itextpdf.com/examples/
* This example only works with the AGPL version of iText.
*/
package part2.chapter06;
import java.io.FileOutputStream;
import java.io.IOException;
import java.sql.SQLException;
import com.itextpdf.text.Document;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfCopy;
import com.itextpdf.text.pdf.PdfReader;
import part1.chapter02.MovieHistory;
import part1.chapter02.MovieLinks1;
public class Concatenate {
/** The resulting PDF file. */
public static final String RESULT
= "results/part2/chapter06/concatenated.pdf";
/**
* Main method.
* @param args no arguments needed
* @throws DocumentException
* @throws IOException
* @throws SQLException
*/
public static void main(String[] args)
throws IOException, DocumentException, SQLException {
// using previous examples to create PDFs
MovieLinks1.main(args);
MovieHistory.main(args);
String[] files = { MovieLinks1.RESULT, MovieHistory.RESULT };
// step 1
Document document = new Document();
// step 2
PdfCopy copy = new PdfCopy(document, new FileOutputStream(RESULT));
// step 3
document.open();
// step 4
PdfReader reader;
int n;
// loop over the documents you want to concatenate
for (int i = 0; i < files.length; i++) {
reader = new PdfReader(files[i]);
// loop over the pages in that document
n = reader.getNumberOfPages();
for (int page = 0; page < n; ) {
copy.addPage(copy.getImportedPage(reader, ++page));
}
copy.freeReader(reader);
}
// step 5
document.close();
}
}
http://itextpdf.com/examples/iia.php?id=123
編輯:為了公平起見,我下載了該庫,並嘗試了該示例。 它像一種魅力。
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