html转pdf 时插入文字,HTML转PDF字体的坑，搞了半天

最新推荐文章于 2024-11-22 13:45:41 发布

转载最新推荐文章于 2024-11-22 13:45:41 发布 · 1k 阅读

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#html转pdf 时插入文字

本文详细介绍了在使用iText进行HTML转PDF时遇到的宋体粗体缺失问题。通过分析默认字体设置，加载系统字体，转换字体格式等方式，最终成功将宋体粗体插入PDF。

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

com.itextpdf

itext7-core

7.1.11

pom

com.itextpdf

html2pdf

2.0.2

0x02：要转换的HTML文件

iText

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iText

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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