在iText中合并两个模板

我得到了马克·斯托尔的帮助 iText mailing list . 解决办法是 PdfTemplate 对象,然后使用 addTemplate() 将它们相加的方法,例如:

PdfTemplate topOfPage = writer.getImportedPage( reader, 1 );
PdfTemplate bottomOfPage = writer.getImportedPage( reader, 2 );

PdfContentByte content = writer.getDirectContent();

// in PDF, "0, 0" is the lower left corner.
content.addTemplate( bottomOfPage );
content.addTemplate( topOfPage, 0, bottomOfPage.getHeight() );

也许这个代码示例有帮助 http://kickjava.com/src/com/lowagie/tools/handout_pdf.java.htm

tplFile$ = "c:/0/background.pdf"
srcFile$ = "c:/0/source1.pdf"
destFile$ = "c:/0/newMergedDest.pdf"

declare Document destDoc!
declare PdfWriter destWriter!
declare PdfReader mainDocReader!
declare PdfReader singlePageBackgroundReader!
declare PdfImportedPage mainDocPage!
declare PdfImportedPage backgroundPage!
declare PdfContentByte dcb!
declare PdfContentByte ucb!

destDoc! = new Document()
destWriter! = PdfWriter.getInstance(destDoc!, new FileOutputStream(destFile$))
destDoc!.open()
dcb! = destWriter!.getDirectContent()
ucb! = destWriter!.getDirectContentUnder()
mainDocReader! = new PdfReader(srcFile$)
singlePageBackgroundReader! = new PdfReader(tplFile$)
backgroundPage! = destWriter!.getImportedPage(singlePageBackgroundReader!,1)
for i=1 to mainDocReader!.getNumberOfPages()
    destDoc!.newPage()
    mainDocPage! = destWriter!.getImportedPage(mainDocReader!,i)
    dcb!.addTemplate(mainDocPage!,0,0)
    ucb!.addTemplate(backgroundPage!,0,0)
next i
destDoc!.close()