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markdown文件转pdf

news 来源：原创 2024/9/20 5:38:39

步骤：md转html转pdf

pom引入

 <!--markdown 转pdf--><dependency><groupId>com.vladsch.flexmark</groupId><artifactId>flexmark-all</artifactId><version>0.64.8</version></dependency><dependency><groupId>com.itextpdf</groupId><artifactId>html2pdf</artifactId><version>5.0.4</version></dependency><dependency><groupId>org.jsoup</groupId><artifactId>jsoup</artifactId><version>1.9.2</version></dependency>

java代码


import com.itextpdf.html2pdf.ConverterProperties;
import com.itextpdf.html2pdf.HtmlConverter;
import com.itextpdf.html2pdf.resolver.font.DefaultFontProvider;
import com.itextpdf.io.font.PdfEncodings;
import com.itextpdf.layout.font.FontInfo;
import com.itextpdf.layout.font.FontProvider;
import com.vladsch.flexmark.html.HtmlRenderer;
import com.vladsch.flexmark.parser.Parser;
import com.vladsch.flexmark.util.ast.Node;
import com.vladsch.flexmark.util.data.MutableDataSet;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Document.OutputSettings;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;public class MarkdownToPdf {public static void main(String[] args) {String markdownFile = "D:\\markdown\\test.md";String pdfFile = "D:\\markdown\\test_" + System.currentTimeMillis() + ".pdf";toPdf(markdownFile, pdfFile);}private static void toPdf(String markdownFile, String pdfFile) {try {// 读取Markdown文件String markdown = new String(Files.readAllBytes(Paths.get(markdownFile)), StandardCharsets.UTF_8);// 转换Markdown为HTMLMutableDataSet options = new MutableDataSet();Parser parser = Parser.builder(options).build();HtmlRenderer renderer = HtmlRenderer.builder(options).build();Node document = parser.parse(markdown);String html = renderer.render(document);// 使用JSoup解析HTML并转换为XHTMLDocument xhtmlDoc = Jsoup.parse(html);xhtmlDoc.outputSettings(new OutputSettings().syntax(OutputSettings.Syntax.xml));// 调整图片大小，不然图片高度显示不全xhtmlDoc.select("img").forEach(img -> {// 设置图片宽度和高度自适应img.attr("style", "max-width: 100%; height: auto;");});// 定义默认字体ConverterProperties converterProperties = new ConverterProperties();FontProvider fontProvider = new DefaultFontProvider(true, false, false);// 写法1// 宋体// URL url = new MarkdownToPdf().getClass().getClassLoader().getResource("font/SimSun.ttf");// 无衬线// URL url = new MarkdownToPdf().getClass().getClassLoader().getResource("font/NotoSansCJKsc-Regular.otf");// 有衬线// URL url = new MarkdownToPdf().getClass().getClassLoader().getResource("font/NotoSerifCJKsc-Regular.otf");// URL url = new MarkdownToPdf().getClass().getClassLoader().getResource("font/NotoSerifCJKsc-Light.otf");// fontProvider.addFont(url.getPath(), PdfEncodings.IDENTITY_H);// 写法2Resource resource = new ClassPathResource("font/SimSun.ttf");fontProvider.addFont(resource.getInputStream().readAllBytes(), PdfEncodings.IDENTITY_H);converterProperties.setFontProvider(fontProvider);File file = new File(pdfFile);FileOutputStream outputStream;try {outputStream = new FileOutputStream(file);} catch (FileNotFoundException e) {throw new RuntimeException(e);}// Html 转化为 pdfHtmlConverter.convertToPdf(xhtmlDoc.html(), outputStream, converterProperties);System.out.println("PDF创建成功！");} catch (IOException e) {System.err.println("文件读取/写入错误: " + e.getMessage());e.printStackTrace();}}}