java 旋转单页文档
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Rotate single page of document
提问by Darth Blue Ray
How do I rotate the second page of my PdF when I'm using iText.
使用 iText 时如何旋转 PdF 的第二页。
The first and other pages I would like to stay in the same orientation.
第一页和其他页面我想保持相同的方向。
I know of ...
我知道 ...
Document document = new Document(PageSize.A4.rotate(), 50, 50, 50, 50);
But that will rotate everything.
但这将旋转一切。
采纳答案by kensen john
From http://itextpdf.com/examples/iia.php?id=232:
来自http://itextpdf.com/examples/iia.php?id=232：
/*
* 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 part4.chapter13;
import java.io.FileOutputStream;
import java.io.IOException;
import part1.chapter03.MovieTemplates;
import com.itextpdf.text.DocumentException;
import com.itextpdf.text.pdf.PdfDictionary;
import com.itextpdf.text.pdf.PdfName;
import com.itextpdf.text.pdf.PdfNumber;
import com.itextpdf.text.pdf.PdfReader;
import com.itextpdf.text.pdf.PdfStamper;
public class RotatePages {
/** The resulting PDF. */
public static final String RESULT
= "results/part4/chapter13/timetable_rotated.pdf";
/**
* Manipulates a PDF file src with the file dest as result
* @param src the original PDF
* @param dest the resulting PDF
* @throws IOException
* @throws DocumentException
*/
public void manipulatePdf(String src, String dest)
throws IOException, DocumentException {
PdfReader reader = new PdfReader(MovieTemplates.RESULT);
int n = reader.getNumberOfPages();
int rot;
PdfDictionary pageDict;
for (int i = 1; i <= n; i++) {
rot = reader.getPageRotation(i);
pageDict = reader.getPageN(i);
pageDict.put(PdfName.ROTATE, new PdfNumber(rot + 90));
}
PdfStamper stamper = new PdfStamper(reader, new FileOutputStream(RESULT));
stamper.close();
reader.close();
}
/**
* Main method creating the PDF.
* @param args no arguments needed
* @throws DocumentException
* @throws IOException
*/
public static void main(String[] args)
throws IOException, DocumentException {
new MovieTemplates().createPdf(MovieTemplates.RESULT);
new RotatePages().manipulatePdf(MovieTemplates.RESULT, RESULT);
}
}
回答by Phuong Ngo
You can use document.setPageSize()before document.addNew();.
document.setPageSize()之前可以使用document.addNew();。
For example:
例如：
Document document = new Document();
....
document.setPageSize(PageSie.A4);
document.newPage();
......
document.setPageSize(PageSize.A4.rotate());
document.newPage();
It worked well for me.
它对我来说效果很好。
回答by Daniel Kennedy
I rotate the orientation:
我旋转方向：
PdfWriter writer = new PdfWriter(out);
PdfDocument pdf = new PdfDocument(writer);
Document document = new Document(pdf, PageSize.LETTER.rotate());
