itext 合并多个pdf为一个pdf 报错

长智齿的程序媛 2015-11-06 11:51:26

如题。Java代码如下



public class MergePdfs {



	public static void mergePdfFiles(String[] files, String savepath) throws DocumentException {

		try {

			

//			 ITextFontResolver fontResolver = renderer.getFontResolver();  

//		     fontResolver.addFont("c:/Windows/Fonts/simsun.ttc", BaseFont.IDENTITY_H,     

//		                BaseFont.NOT_EMBEDDED);

//		     

			Document document = new Document(new PdfReader(files[0]).getPageSize(1));

			File outFile = new File(savepath);

			if(!outFile.exists()){

				outFile.createNewFile();

			}

			

			PdfCopy copy = new PdfCopy(document, new FileOutputStream(outFile));

			document.open();

			for (int i = 0; i < files.length; i++) {

				PdfReader reader = new PdfReader(files[i]);

				int n = reader.getNumberOfPages();

				for (int j = 1; j <= n; j++) {

					document.newPage();

					PdfImportedPage page = copy.getImportedPage(reader, j);

					copy.addPage(page);

				}

			}

			document.close();

		} catch (IOException e) {

			e.printStackTrace();

		} catch (DocumentException e) {

			e.printStackTrace();

		}

	}

}

报错显示：



com.itextpdf.text.exceptions.InvalidPdfException: PDF header signature not found.

	at com.itextpdf.text.pdf.PRTokeniser.getHeaderOffset(PRTokeniser.java:227)

	at com.itextpdf.text.pdf.PdfReader.getOffsetTokeniser(PdfReader.java:486)

	at com.itextpdf.text.pdf.PdfReader.<init>(PdfReader.java:176)

	at com.itextpdf.text.pdf.PdfReader.<init>(PdfReader.java:219)

	at com.itextpdf.text.pdf.PdfReader.<init>(PdfReader.java:207)

	at com.itextpdf.text.pdf.PdfReader.<init>(PdfReader.java:197)

	at cn.yitongwang.utils.MergePdfs.mergePdfFiles(MergePdfs.java:18)

	at cn.yitongwang.service.CommonServiceImpl.slectAllPdfTasks(CommonServiceImpl.java:1487)

	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.lang.reflect.Method.invoke(Unknown Source)

	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:296)

	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:177)

	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:144)

	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:107)

	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:166)

	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)

	at com.sun.proxy.$Proxy8.slectAllPdfTasks(Unknown Source)

	at cn.yitongwang.utils.PDFtransferEntrance.main(PDFtransferEntrance.java:14)