合并后打印PDF文件时出现以下问题,PDF文档被截断。 有时发生这种情况是因为文档不是8.5 x 11 它们可能就像11 x 17.如何正确合并文档?
我们可以让它检测页面大小,然后对这些文档使用相同的页面大小吗? 或者,如果没有,是否有可能适合页面?
以下是代码:
package com.sumit.program;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import com.itextpdf.text.Document;
import com.itextpdf.text.PageSize;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.BaseFont;
import com.itextpdf.text.pdf.PdfContentByte;
import com.itextpdf.text.pdf.PdfImportedPage;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfWriter;
public class MergePdf {
public static void main(String[] args) {
try {
List<InputStream> pdfs = new ArrayList<InputStream>();
pdfs.add(new FileInputStream("C:\\Documents and Settings\\Sumit\\Desktop\\NewEcnProject\\Document1.pdf"));
pdfs.add(new FileInputStream("C:\\Documents and Settings\\Sumit\\Desktop\\NewEcnProject\\Landscape.pdf"));
OutputStream output = new FileOutputStream("C:\\Documents and Settings\\Sumit\\Desktop\\NewEcnProject\\merge1.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.
int i=1;
while (iteratorPDFs.hasNext()) {
InputStream pdf = iteratorPDFs.next();
PdfReader pdfReader = new PdfReader(pdf);
System.out.println("Page size is "+pdfReader.getPageSize(1));
readers.add(pdfReader);
totalPages += pdfReader.getNumberOfPages();
i++;
}
// Create a writer for the outputstream
PdfWriter writer = PdfWriter.getInstance(document, outputStream);
writer.setCompressionLevel(9);
document.open();
BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA,
BaseFont.CP1252, 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.
System.out.println("No. of pages "+pdfReader.getNumberOfPages());
i=0;
while (pageOfCurrentReaderPDF < pdfReader.getNumberOfPages()) {
Rectangle r=pdfReader.getPageSize(pdfReader.getPageN(pageOfCurrentReaderPDF+1));
if(r.getWidth()==792.0 && r.getHeight()==612.0)
document.setPageSize(PageSize.A4.rotate());
else
document.setPageSize(PageSize.A4);
document.newPage();
pageOfCurrentReaderPDF++;
currentPageNumber++;
i++;
page = writer.getImportedPage(pdfReader,
pageOfCurrentReaderPDF);
System.out.println("Width is "+page.getWidth());
System.out.println("Height is "+page.getHeight());
cb.newlineText();
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();
System.out.println("Merging of Pdfs is done.......");
} catch (Exception e) {
e.printStackTrace();
} finally {
if (document.isOpen())
document.close();
try {
if (outputStream != null)
outputStream.close();
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
}
这里使用writer.setCropBoxSize(psize)它会做什么? –
你能给我提供整个代码吗?此代码snippest不适合我。 –
此答案使用错误的方法!请参阅**官方**文档,了解如何实现您想要的内容。 –