HTML转PDF字体的坑，搞了半天
阅读文本大概需要3分钟。
itext提供可HTML转PDF的工具包，但是在中文字体时也许会遇到意想不到的问题。特别宋体对应的粗体。
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：要转换的HTML文件
<head>
</head>
<body>
<p>iText</p>
<div><b>大发发发萨法发发呆发呆东方大厦发</b></div>
<div style="font-family:SimSun;weight:normal">Your developer here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的journey with iText begins here法大大是地方大发顺丰萨法发顺丰的</div>
<div style="font-family:SimSun;font-weight:bold">Your developer here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的journey with iText begins here法大大是地方大发顺丰萨法发顺丰的</div>
<p>iText</p>
<div><b>大发发发萨法发发呆发呆东方大厦发</b></div>
<div style="font-family:宋体;weight:normal">Your developer here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的journey with iText begins here法大大是地方大发顺丰萨法发顺丰的</div>
<div style="font-family:宋体;font-weight:bold">Your developer here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的here法大大是地方大发顺丰萨法发顺丰的journey with iText begins here法大大是地方大发顺丰萨法发顺丰的</div>
</body>
0x03：编写代码
- itext默认字体
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();
}
}
默认转换结果
- 加载宋体
这里只加载了宋体，没有加载宋粗体
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();
//宋体
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();
}
}
发现转换出来的PDF，丢失了字体样式
分析原因发现C:\Windows\Fonts默认没有宋体粗字体，默认只有宋体常规
网上下载宋体粗字体宋体-粗体.ttf，下载的都是ttf格式；代码加载宋体粗字体
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();
//宋体
FontProgram fontProgram1 = FontProgramFactory.createFont("C:\\Users\\2230\\Desktop\\a\\simsun.ttc,1");
fontProvider.addFont(fontProgram1);
//宋体粗体
FontProgram fontProgram2 = FontProgramFactory.createFont("C:\\Users\\2230\\Desktop\\a\\宋体-粗体.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();
}
}
多加了如下代码：
执行直接报错，字体无法加载
- 把ttf转换成otf格式字体
在线转换工具：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();
//宋体
FontProgram fontProgram1 = FontProgramFactory.createFont("C:\\Users\\2230\\Desktop\\a\\simsun.ttc,0");
fontProvider.addFont(fontProgram1);
//宋体粗体
FontProgram fontProgram2 = FontProgramFactory.createFont("C:\\Users\\2230\\Desktop\\a\\宋体-粗体.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();
}
}
转换结果
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原始发表：2020-06-12，如有侵权请联系 cloudcommunity@tencent.com 删除
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