问题
I have a requirement to convert HTML with SVG Content to PDF using Itext. I am using latest Itext version along with Html2Pdf jar. I tried to implement but the generated PDF does not render the SVG content properly. The SVG content is messed up. I do not have any control on SVG content generation in PDF. I have pasted the implementation code and sample HTML below . Can anyone please let me know how can I achieve it ?
Here is the test code
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.net.MalformedURLException;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import org.apache.commons.io.IOUtils;
import com.itextpdf.html2pdf.ConverterProperties;
import com.itextpdf.html2pdf.HtmlConverter;
import com.itextpdf.html2pdf.attach.impl.OutlineHandler;
import com.itextpdf.io.font.FontProgram;
import com.itextpdf.io.font.FontProgramFactory;
import com.itextpdf.io.font.PdfEncodings;
import com.itextpdf.io.image.ImageDataFactory;
import com.itextpdf.kernel.events.Event;
import com.itextpdf.kernel.events.IEventHandler;
import com.itextpdf.kernel.events.PdfDocumentEvent;
import com.itextpdf.kernel.font.PdfFont;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfPage;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.kernel.pdf.xobject.PdfFormXObject;
import com.itextpdf.layout.Canvas;
import com.itextpdf.layout.Style;
import com.itextpdf.layout.borders.Border;
import com.itextpdf.layout.borders.SolidBorder;
import com.itextpdf.layout.element.Cell;
import com.itextpdf.layout.element.Image;
import com.itextpdf.layout.element.Paragraph;
import com.itextpdf.layout.element.Table;
import com.itextpdf.layout.element.Text;
import com.itextpdf.layout.font.FontProvider;
import com.itextpdf.layout.property.HorizontalAlignment;
import com.itextpdf.layout.property.TextAlignment;
import com.itextpdf.layout.property.UnitValue;
import com.itextpdf.styledxmlparser.css.media.MediaDeviceDescription;
public class HtmlConvert {
public static void main(String[] args) {
String uuid = UUID.randomUUID().toString();
try{
ConverterProperties properties = new ConverterProperties();
String fonts[] = {Paths.get("fonts").toAbsolutePath() + "/TREBUC.TTF", Paths.get("fonts").toAbsolutePath() + "/TREBUCBD.TTF", Paths.get("fonts").toAbsolutePath() + "/TREBUCBI.TTF",Paths.get("fonts").toAbsolutePath() + "/TREBUCIT.TTF"};
FontProvider fontProvider = new FontProvider();
Map<String, PdfFont> pdfFontMap = new HashMap();
for (String font : fonts) {
FontProgram fontProgram = FontProgramFactory.createFont(font);
if(font.endsWith("TREBUC.TTF")) {
pdfFontMap.put("NORMAL", PdfFontFactory.createFont(fontProgram, PdfEncodings.WINANSI, true));
} else if(font.endsWith("TREBUCBD.TTF")) {
pdfFontMap.put("BOLD", PdfFontFactory.createFont(fontProgram, PdfEncodings.WINANSI, true));
} else if(font.endsWith("TREBUCBI.TTF")) {
pdfFontMap.put("BOLD_ITALIC", PdfFontFactory.createFont(fontProgram, PdfEncodings.WINANSI, true));
} else if(font.endsWith("TREBUCIT.TTF")) {
pdfFontMap.put("ITALIC", PdfFontFactory.createFont(fontProgram, PdfEncodings.WINANSI, true));
}
fontProvider.addFont(fontProgram);
}
properties.setFontProvider(fontProvider);
properties.setMediaDeviceDescription(new MediaDeviceDescription(com.itextpdf.styledxmlparser.css.media.MediaType.PRINT));
List<Map<String, Object>> userData = new ArrayList<Map<String,Object>>();
Map<String,Object> userMap = new HashMap<String, Object>();
userMap.put("user","testusername");
userMap.put("name","Nithin");
userMap.put("dateTime","20/05/2019");
userMap.put("orgnName","TEST");
userMap.put("wGnrName","TEST");
userMap.put("dpVerNum","3");
userData.add(userMap);
List<Map<String, Object>> headerData = new ArrayList<Map<String,Object>>();
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
PdfWriter writer = new PdfWriter(byteArrayOutputStream);
PdfDocument pdfDoc = new PdfDocument(writer);
HtmlConvert htmlConvert = new HtmlConvert();
NormalPageHeader headerHandler = htmlConvert.new NormalPageHeader(Paths.get("images").toAbsolutePath() + "\\logo.png", userData, headerData, pdfFontMap);
pdfDoc.addEventHandler(PdfDocumentEvent.START_PAGE, headerHandler);
PageEndEvent pageEndEvent = htmlConvert.new PageEndEvent(Paths.get("images").toAbsolutePath() + "\\FooterLineExternal.png" ,pdfFontMap);
pdfDoc.addEventHandler(PdfDocumentEvent.END_PAGE, pageEndEvent);
OutlineHandler outlineHandler = OutlineHandler.createStandardHandler();
properties.setOutlineHandler(outlineHandler);
String theString2 = IOUtils.toString(new FileInputStream(new File(Paths.get("Input").toAbsolutePath()+"/test.html")), "UTF-8");
HtmlConverter.convertToPdf(theString2, pdfDoc, properties);
FileOutputStream outputStream = new FileOutputStream(new File(Paths.get("Output").toAbsolutePath()+"/htmlconverted.pdf"));
outputStream.write(byteArrayOutputStream.toByteArray());
outputStream.close();
pdfDoc.close();
System.out.println("Converted to PDF Succesfully >>> convertedSvg_"+uuid+".pdf");
}catch(Exception e){
e.printStackTrace();
System.out.println("Error Occured while converting to PDF = " + e.getMessage());
}
}
class NormalPageHeader implements IEventHandler {
String header;
List<Map<String, Object>> data;
List<Map<String, Object>> user;
Map<String, PdfFont> font;
public NormalPageHeader(String header, List<Map<String, Object>> user, List<Map<String, Object>> data, Map<String, PdfFont> font) {
this.font = font;
this.header = header;
this.data = data;
this.user = user;
}
@Override
public void handleEvent(Event event) {
//Retrieve document and
PdfDocumentEvent docEvent = (PdfDocumentEvent) event;
PdfDocument pdf = docEvent.getDocument();
PdfPage page = docEvent.getPage();
Rectangle pageSize = page.getPageSize();
PdfCanvas pdfCanvas = new PdfCanvas(
page.getLastContentStream(), page.getResources(), pdf);
Canvas canvas = new Canvas(pdfCanvas, pdf, pageSize);
canvas.setFontSize(10f);
Table table = new Table(3);
table.setBorder(Border.NO_BORDER);
table.setWidth(UnitValue.createPercentValue(100));
Cell leftCell = new Cell();
leftCell.setFont(font.get("NORMAL"));
leftCell.setPaddingTop(15);
leftCell.setPaddingLeft(20);
leftCell.setBorder(Border.NO_BORDER);
leftCell.setBorderBottom(new SolidBorder(0.5f));
leftCell.setWidth(UnitValue.createPercentValue(33.3f));
Text userLabel = new Text("Username: ");
userLabel.setBold();
Paragraph paragraph = new Paragraph(userLabel);
paragraph.add( new Text(String.valueOf(user.get(0).get("user"))));
paragraph.setFontColor(com.itextpdf.kernel.colors.ColorConstants.GRAY);
paragraph.setTextAlignment(TextAlignment.LEFT);
paragraph.setFontSize(8);
leftCell.add(paragraph);
Text dbLabel = new Text("Database: ");
dbLabel.setBold();
paragraph = new Paragraph(dbLabel);
paragraph.add( new Text(String.valueOf(user.get(0).get("name"))));
paragraph.setFontColor(com.itextpdf.kernel.colors.ColorConstants.GRAY);
paragraph.setTextAlignment(TextAlignment.LEFT);
paragraph.setFontSize(8);
leftCell.add(paragraph);
Text dtLabel = new Text("Date: ");
dtLabel.setBold();
paragraph = new Paragraph(dtLabel);
paragraph.add( new Text(String.valueOf(user.get(0).get("dateTime"))));
paragraph.setFontColor(com.itextpdf.kernel.colors.ColorConstants.GRAY);
paragraph.setTextAlignment(TextAlignment.LEFT);
paragraph.setFontSize(8);
leftCell.add(paragraph);
table.addCell(leftCell);
Cell middleCell = new Cell();
middleCell.setFont(font.get("NORMAL"));
middleCell.setPaddingTop(15);
middleCell.setBorder(Border.NO_BORDER);
middleCell.setBorderBottom(new SolidBorder(0.5f));
middleCell.setWidth(UnitValue.createPercentValue(33.3f));
paragraph = new Paragraph("Test header");
paragraph.setTextAlignment(TextAlignment.CENTER);
paragraph.setBold();
paragraph.setFontSize(12);
middleCell.add(paragraph);
paragraph = new Paragraph(String.valueOf(user.get(0).get("orgnName")));
paragraph.setTextAlignment(TextAlignment.CENTER);
paragraph.setBold();
paragraph.setFontSize(10);
middleCell.add(paragraph);
paragraph = new Paragraph("TEST");
paragraph.setTextAlignment(TextAlignment.CENTER);
paragraph.setBold();
paragraph.setFontSize(10);
middleCell.add(paragraph);
table.addCell(middleCell);
Cell rightCell = new Cell();
rightCell.setFont(font.get("NORMAL"));
rightCell.setPaddingTop(20);
rightCell.setWidth(UnitValue.createPercentValue(33.3f));
rightCell.setHorizontalAlignment(HorizontalAlignment.RIGHT);
rightCell.setBorder(Border.NO_BORDER);
rightCell.setBorderBottom(new SolidBorder(0.5f));
rightCell.setPaddingRight(20);
//Write text at position
Image img;
try {
img = new Image(ImageDataFactory.create(header));
img.setHorizontalAlignment(HorizontalAlignment.RIGHT);
Style style = new Style();
style.setWidth(91);
style.setHeight(25);
img.addStyle(style);
rightCell.add(img);
table.addCell(rightCell);
table.setMarginLeft(15);
table.setMarginRight(15);
canvas.add(table);
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
}
class PageEndEvent implements IEventHandler {
protected PdfFormXObject placeholder;
protected float side = 20;
protected float x = 420;
protected float y = 20;
protected float space = 4.5f;
private String bar;
protected float descent = 3;
Map<String, PdfFont> font;
public PageEndEvent(String bar, Map<String, PdfFont> font) {
this.font = font;
this.bar = bar;
placeholder = new PdfFormXObject(new Rectangle(0, 0, side, side));
}
@Override
public void handleEvent(Event event) {
Table table = new Table(3);
table.setBorder(Border.NO_BORDER);
table.setWidth(UnitValue.createPercentValue(100));
Cell confCell = new Cell();
confCell.setFont(font.get("NORMAL"));
confCell.setPaddingTop(15);
confCell.setPaddingLeft(40);
confCell.setBorder(Border.NO_BORDER);
confCell.setBorderBottom(new SolidBorder(0.5f));
confCell.setWidth(UnitValue.createPercentValue(100));
PdfDocumentEvent docEvent = (PdfDocumentEvent) event;
PdfDocument pdf = docEvent.getDocument();
PdfPage page = docEvent.getPage();
Rectangle pageSize = page.getPageSize();
PdfCanvas pdfCanvas = new PdfCanvas(
page.getLastContentStream(), page.getResources(), pdf);
Canvas canvas = new Canvas(pdfCanvas, pdf, pageSize);
Image img;
try {
img = new Image(ImageDataFactory.create(bar));
img.setHorizontalAlignment(HorizontalAlignment.LEFT);
Style style = new Style();
style.setWidth(UnitValue.createPercentValue(100));
style.setHeight(50);
img.addStyle(style);
Paragraph p = new Paragraph().add("TEST FOOTER");
p.setFont(font.get("NORMAL"));
p.setFontSize(8);
p.setFontColor(com.itextpdf.kernel.colors.ColorConstants.GRAY);
canvas.showTextAligned(p, x, y, TextAlignment.CENTER);
pdfCanvas.addXObject(placeholder, x + space, y - descent);
pdfCanvas.release();
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
public void writeTotal(PdfDocument pdf) {
Canvas canvas = new Canvas(placeholder, pdf);
canvas.showTextAligned(String.valueOf(pdf.getNumberOfPages()),
0, descent, TextAlignment.LEFT);
}
}
}
HTML code
<html>
<head>
<title></title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<div>
<p>Taken from wikpedia</p>
<svg xmlns="http://www.w3.org/2000/svg" height="400" width="100%">
<path id="lineAB" d="M 100 350 l 150 -300" stroke="red"
stroke-width="3" fill="none" />
<path id="lineBC" d="M 250 50 l 150 300" stroke="red"
stroke-width="3" fill="none" />
<path d="M 175 200 l 150 0" stroke="green" stroke-width="3"
fill="none" />
<path d="M 100 350 q 150 -300 300 0" stroke="blue"
stroke-width="5" fill="none" />
<!-- Mark relevant points -->
<g stroke="black" stroke-width="3" fill="black">
<circle id="pointA" cx="100" cy="350" r="3" />
<circle id="pointB" cx="250" cy="50" r="3" />
<circle id="pointC" cx="400" cy="350" r="3" />
</g>
<!-- Label the points -->
<g font-size="30" font-family="sans-serif" fill="black" stroke="none"
text-anchor="middle">
<text x="100" y="350" dx="-30">A</text>
<text x="250" y="50" dy="-10">B</text>
<text x="400" y="350" dx="30">C</text>
</g>
</svg>
</div>
</body>
</html>
来源：https://stackoverflow.com/questions/57027844/how-can-i-convert-html-with-svg-content-to-pdf-using-itext-pdf-api