java多种方式实现pdf文件电子签名

package com.taoyuan.pdf.sign.itext;

import java.io.InputStream;
import java.io.OutputStream;
import java.security.PrivateKey;
import java.security.cert.Certificate;

import com.itextpdf.text.pdf.security.MakeSignature.CryptoStandard;

public interface PdfSign {
	 void sign（InputStream src  //需要签章的pdf文件路径
             OutputStream dest  // 签完章的pdf文件路径
             Certificate[] chain //证书链
             PrivateKey pk //签名私钥
             String digestAlgorithm  //摘要算法名称，例如SHA-1
             String provider  // 密钥算法提供者，可以为null
             CryptoStandard subfilter //数字签名格式，itext有2种
             String reason  //签名的原因，显示在pdf签名属性中，随便填
             String locationString chapterPath）; //签名的地点，显示在pdf签名属性中，随便填
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件        717  2018-09-03 16:06  pdfsign.classpath

     文件        383  2017-10-07 19:18  pdfsign.project

     文件        598  2017-10-07 19:18  pdfsign.settingsorg.eclipse.jdt.core.prefs

     文件      61079  2017-10-07 19:18  pdfsigninchapter.png

     文件        559  2018-08-31 15:53  pdfsignincom aoyuanpdfsignitextPdfSign.class

     文件      13670  2018-08-31 15:53  pdfsignincom aoyuanpdfsignitextPdfSignBox.class

     文件       4522  2018-09-03 16:48  pdfsignincom aoyuanpdfsignitextPdfSignItext.class

     文件       1580  2018-08-31 15:53  pdfsignincom aoyuanpdfsignpdfboxCMSProcessableInputStream.class

     文件       3232  2018-08-31 15:53  pdfsignincom aoyuanpdfsignpdfboxCreateEmptySignatureForm.class

     文件       6774  2018-08-31 15:53  pdfsignincom aoyuanpdfsignpdfboxCreateSignature.class

     文件      11875  2018-08-31 15:53  pdfsignincom aoyuanpdfsignpdfboxCreateSignaturebase.class

     文件      13174  2018-08-31 15:53  pdfsignincom aoyuanpdfsignpdfboxCreateVisibleSignature.class

     文件       9478  2018-08-31 15:53  pdfsignincom aoyuanpdfsignpdfboxShowSignature.class

     文件       5316  2018-08-31 15:53  pdfsignincom aoyuanpdfsignpdfboxTSAClient.class

     文件       1338  2018-09-03 16:48  pdfsignincom aoyuanpdfsign estTest.class

     文件     323674  2017-10-07 19:18  pdfsignindemo.pdf

     文件       2528  2017-10-07 19:18  pdfsignin est.p12

     文件     108232  2017-10-07 19:18  pdfsignlibcmail-jdk15on-158.jar

     文件     785915  2017-10-07 19:18  pdfsignlibcpkix-jdk15on-158.jar

     文件    3955990  2017-10-07 19:18  pdfsignlibcprov-jdk15on-158.jar

     文件    5599685  2017-10-07 19:18  pdfsignlibitextpdf-5.5.10-javadoc.jar

     文件    2323873  2017-10-07 19:18  pdfsignlibitextpdf-5.5.10-sources.jar

     文件    2290510  2017-10-07 19:18  pdfsignlibitextpdf-5.5.10.jar

     文件    8016707  2017-10-07 19:18  pdfsignlibpdfbox-app-2.0.7.jar

     文件      61079  2017-10-07 19:18  pdfsignsrcchapter.png

     文件        920  2017-10-07 19:18  pdfsignsrccom aoyuanpdfsignitextPdfSign.java

     文件      18335  2017-10-07 19:18  pdfsignsrccom aoyuanpdfsignitextPdfSignBox.java

     文件       5624  2018-09-03 16:48  pdfsignsrccom aoyuanpdfsignitextPdfSignItext.java

     文件       2177  2017-10-07 19:18  pdfsignsrccom aoyuanpdfsignpdfboxCMSProcessableInputStream.java

     文件       3465  2017-10-07 19:18  pdfsignsrccom aoyuanpdfsignpdfboxCreateEmptySignatureForm.java

............此处省略30个文件信息