代码:
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import java.io.file; import java.io.fileoutputstream; import java.io.ioexception; import java.util.list; import com.itextpdf.text.documentexception; import com.itextpdf.text.image; import com.itextpdf.text.pdf.pdfcontentbyte; import com.itextpdf.text.pdf.pdfreader; import com.itextpdf.text.pdf.pdfstamper; public class pdfutils { /** * pdf添加图层 * * @param srcpdf * 原pdf文件路径 * @param distpdf * 合成pdf输出路径 * @param layerpatharr * 图层路径列表,图层名称需为数字(按照图片名称数字顺序合成在pdf对应页数上) * @return * @throws ioexception * @throws documentexception */ public static string marklocalimage42dist(string srcpdf, string distpdf, list<string> layerpatharr) throws ioexception, documentexception { file srcpdffile = new file(srcpdf); if (!srcpdffile.exists()) { throw new illegalargumentexception( "找不到需要添加图层的pdf文件" ); } pdfreader reader = new pdfreader(srcpdf); int n = reader.getnumberofpages(); // pdf页数 pdfstamper stamp = new pdfstamper(reader, new fileoutputstream(distpdf)); pdfcontentbyte over; for (string layerpath : layerpatharr) { file layerfile = new file(layerpath); string currentpageno = layerfile.getname().substring( 0 , layerfile.getname().lastindexof( "." )); // 图片名称(对应页数) boolean isnum = currentpageno.matches( "[0-9]+" ); if (!isnum) { throw new illegalargumentexception( "图层名称是不是数字" ); } image img = image.getinstance(layerpath); img.setabsoluteposition( 0 , 0 ); if (n > 0 && n >= integer.parseint(currentpageno)) { over = stamp.getovercontent(integer.parseint(currentpageno)); over.addimage(img); } } stamp.close(); reader.close(); return distpdf; } } |
测试:
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public static void main(string[] args) throws ioexception, documentexception { list<string> imgurllist = new arraylist<>(); imgurllist.add( "d:/ts/testpdf/1.png" ); //imgurllist.add("d:/ts/testpdf/2.png"); imgurllist.add( "d:/ts/testpdf/3.png" ); marklocalimage42dist( "d:/ts/testpdf/testpdf.pdf" , "d:/ts/testpdf/testpdf2.pdf" , imgurllist); } |
结果:
原pdf:
合成后pdf:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://www.cnblogs.com/hooly/p/8394859.html