java使用itext按页码拆分pdf文件，代码实现如下：
/**
* @author
*
* @param inputStream Input PDF file
* @param outputStream Output PDF file
* @param fromPage start page from input PDF file
* @param toPage end page from input PDF file
*/
public static void splitPDF(InputStream inputStream,
OutputStream outputStream, int fromPage, int toPage) {
Document document = new Document();
try {
PdfReader inputPDF = new PdfReader(inputStream);
int totalPages = inputPDF.getNumberOfPages();
//make fromPage equals to toPage if it is greater
if(fromPage > toPage ) {
fromPage = toPage;
}
if(toPage > totalPages) {
toPage = totalPages;
}
// Create a writer for the outputstream
PdfWriter writer = PdfWriter.getInstance(document, outputStream);
document.open();
PdfContentByte cb = writer.getDirectContent(); // Holds the PDF data
PdfImportedPage page;
while(fromPage <= toPage) {
document.newPage();
page = writer.getImportedPage(inputPDF, fromPage);
cb.addTemplate(page, 0, 0);
fromPage++;
}
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();
}
}
}
使用示例如下,将一个20页的pdf文件拆分成1-12和13-20页两个pdf文件：
public static void main(String[] args) {
try {
MergePDF.splitPDF(new FileInputStream("C:\\input.pdf"),
new FileOutputStream("C:\\output1.pdf"), 1, 12);
MergePDF.splitPDF(new FileInputStream("C:\\input.pdf"),
new FileOutputStream("C:\\output2.pdf"), 13, 20);
} catch (Exception e) {
e.printStackTrace();
}
}
