itext提供可HTML轉PDF的工具包，但是在中文字體時也許會遇到意想不到的問題。特別宋體對應的粗體。
0x01：引入itext包
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>itext7-core</artifactId>
<version>7.1.11</version>
<type>pom</type>
</dependency>
<dependency>
<groupId>com.itextpdf</groupId>
<artifactId>html2pdf</artifactId>
<version>2.0.2</version>
</dependency>
0x02：要轉換的HTML文件
<head>
</head>
<body>
<p>iText</p>
<div><b>大發發發薩法發發呆發呆東方大廈發</b></div>
<div style="font-family:SimSun;weight:normal">Your developer here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的journey with iText begins here法大大是地方大發順豐薩法發順豐的</div>
<div style="font-family:SimSun;font-weight:bold">Your developer here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的journey with iText begins here法大大是地方大發順豐薩法發順豐的</div>
<p>iText</p>
<div><b>大發發發薩法發發呆發呆東方大廈發</b></div>
<div style="font-family:宋體;weight:normal">Your developer here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的journey with iText begins here法大大是地方大發順豐薩法發順豐的</div>
<div style="font-family:宋體;font-weight:bold">Your developer here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的here法大大是地方大發順豐薩法發順豐的journey with iText begins here法大大是地方大發順豐薩法發順豐的</div>
</body>
0x03：編寫代碼
import java.io.IOException;
import com.itextpdf.io.font.FontConstants;
import com.itextpdf.kernel.events.Event;
import com.itextpdf.kernel.events.IEventHandler;
import com.itextpdf.kernel.events.PdfDocumentEvent;
import com.itextpdf.kernel.font.PdfFontFactory;
import com.itextpdf.kernel.geom.Rectangle;
import com.itextpdf.kernel.pdf.canvas.PdfCanvas;
import com.itextpdf.layout.Document;
public class TextFooterEventHandler implements IEventHandler {
private Document doc;
private int page;
public TextFooterEventHandler(Document doc) {
this.doc = doc;
}
public void handleEvent(Event event) {
PdfDocumentEvent docEvent = (PdfDocumentEvent) event;
PdfCanvas canvas = new PdfCanvas(docEvent.getPage());
Rectangle pageSize = docEvent.getPage().getPageSize();
page++;
canvas.beginText();
try {
canvas.setFontAndSize(PdfFontFactory.createFont(FontConstants.HELVETICA_OBLIQUE), 15);
} catch (IOException e) {
e.printStackTrace();
}
canvas.moveText((pageSize.getRight() - doc.getRightMargin() +
(pageSize.getLeft() + doc.getLeftMargin())) / 2,
pageSize.getBottom() + doc.getBottomMargin())
.showText("" + page).endText().release();
}
}
-
itext默認字體
public static void defaultFont() throws Exception{
try {
String pdfPath = "C:\\Users\\2230\\Desktop\\a\\defaultFont.pdf";
PdfWriter pdfWriter = new PdfWriter(new File(pdfPath));
PdfDocument pdfDocument = new PdfDocument(pdfWriter) ;
Document doc = new Document(pdfDocument);
pdfDocument.setDefaultPageSize(PageSize.A4);
pdfDocument.addEventHandler(PdfDocumentEvent.END_PAGE, new TextFooterEventHandler(doc));
ConverterProperties pro = new ConverterProperties();
FontProvider fontProvider = new DefaultFontProvider();
fontProvider.addSystemFonts();
pro.setFontProvider(fontProvider);
HtmlConverter.convertToPdf(new FileInputStream("C:\\Users\\2230\\Desktop\\a\\d.html"), pdfDocument, pro);
} catch (Exception e) {
e.printStackTrace();
}
}
默認轉換結果
-
加載宋體
這裏只加載了宋體，沒有加載宋粗體
public static void songTiDefaultFont() throws Exception{
try{
String pdfPath = "C:\\Users\\2230\\Desktop\\a\\songTiDefaultFont.pdf";
PdfWriter pdfWriter = new PdfWriter(new File(pdfPath));
PdfDocument pdfDocument = new PdfDocument(pdfWriter) ;
Document doc = new Document(pdfDocument);
pdfDocument.setDefaultPageSize(PageSize.A4);
pdfDocument.addEventHandler(PdfDocumentEvent.END_PAGE, new TextFooterEventHandler(doc));
ConverterProperties pro = new ConverterProperties();
FontProvider fontProvider = new DefaultFontProvider();
//宋體
FontProgram fontProgram1 = FontProgramFactory.createFont("C:\\Users\\2230\\Desktop\\a\\simsun.ttc,1");
fontProvider.addFont(fontProgram1);
pro.setFontProvider(fontProvider);
HtmlConverter.convertToPdf(new FileInputStream("C:\\Users\\2230\\Desktop\\a\\d.html"), pdfDocument, pro);
} catch (Exception e) {
e.printStackTrace();
}
}
發現轉換出來的PDF，丟失了字體樣式
分析原因發現C:\Windows\Fonts默認沒有宋體粗字體，默認只有宋體常規
網上下載宋體粗字體宋體-粗體.ttf，下載的都是ttf格式；代碼加載宋體粗字體
public static void songTiDefaultFont() throws Exception{
try{
String pdfPath = "C:\\Users\\2230\\Desktop\\a\\songTiDefaultFont.pdf";
PdfWriter pdfWriter = new PdfWriter(new File(pdfPath));
PdfDocument pdfDocument = new PdfDocument(pdfWriter) ;
Document doc = new Document(pdfDocument);
pdfDocument.setDefaultPageSize(PageSize.A4);
pdfDocument.addEventHandler(PdfDocumentEvent.END_PAGE, new TextFooterEventHandler(doc));
ConverterProperties pro = new ConverterProperties();
FontProvider fontProvider = new DefaultFontProvider();
//宋體
FontProgram fontProgram1 = FontProgramFactory.createFont("C:\\Users\\2230\\Desktop\\a\\simsun.ttc,1");
fontProvider.addFont(fontProgram1);
//宋體粗體
FontProgram fontProgram2 = FontProgramFactory.createFont("C:\\Users\\2230\\Desktop\\a\\宋體-粗體.ttf");
fontProvider.addFont(fontProgram2);
pro.setFontProvider(fontProvider);
HtmlConverter.convertToPdf(new FileInputStream("C:\\Users\\2230\\Desktop\\a\\d.html"), pdfDocument, pro);
} catch (Exception e) {
e.printStackTrace();
}
}
多加了如下代碼：
執行直接報錯，字體無法加載
-
把ttf轉換成otf格式字體
在線轉換工具：https://www.fontke.com/tool/convfont
public static void songConvertTiFont() throws Exception{
try{
String pdfPath = "C:\\Users\\2230\\Desktop\\a\\songTiFont.pdf";
PdfWriter pdfWriter = new PdfWriter(new File(pdfPath));
PdfDocument pdfDocument = new PdfDocument(pdfWriter) ;
Document doc = new Document(pdfDocument);
pdfDocument.setDefaultPageSize(PageSize.A4);
pdfDocument.addEventHandler(PdfDocumentEvent.END_PAGE, new TextFooterEventHandler(doc));
ConverterProperties pro = new ConverterProperties();
FontProvider fontProvider = new DefaultFontProvider();
fontProvider.addSystemFonts();
//宋體
FontProgram fontProgram1 = FontProgramFactory.createFont("C:\\Users\\2230\\Desktop\\a\\simsun.ttc,0");
fontProvider.addFont(fontProgram1);
//宋體粗體
FontProgram fontProgram2 = FontProgramFactory.createFont("C:\\Users\\2230\\Desktop\\a\\宋體-粗體.otf");
fontProvider.addFont(fontProgram2);
pro.setFontProvider(fontProvider);
HtmlConverter.convertToPdf(new FileInputStream("C:\\Users\\2230\\Desktop\\a\\d.html"), pdfDocument, pro);
} catch (Exception e) {
e.printStackTrace();
}
}
轉換結果
