html转为pdf有两种方法：

1. xhtmlrenderer
2. itext

1.使用xhtmlrenderer

依赖

<dependency><groupId>org.xhtmlrenderer</groupId><artifactId>flying-saucer-pdf</artifactId><version>9.1.18</version>
</dependency>

template.html

java代码

import com.lowagie.text.pdf.BaseFont;
import org.xhtmlrenderer.pdf.ITextFontResolver;
import org.xhtmlrenderer.pdf.ITextRenderer;import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;public class HtmlToPdf {private static final String resourcesDir = System.getProperty("user.dir") + "/src/main/resources";public void htmlToPdf() throws Exception {String path = resourcesDir + "/template/template.html";String destPath = resourcesDir + "/template/template.pdf";ITextRenderer renderer = new ITextRenderer();OutputStream os = new FileOutputStream(destPath);renderer.setDocument(new File(path));ITextFontResolver resolver = renderer.getFontResolver();//添加字体，解决中文不显示的问题resolver.addFont(resourcesDir + "/font/simsun.ttc", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);renderer.layout();renderer.createPDF(os);os.close();}public static void main(String[] args) throws Exception {new HtmlToPdf().htmlToPdf();}}

生成的pdf

注意事项

1. 在html中需要在body中定义font-family，定义的字体需要跟代码中使用的字体完全一致。
2. 不要在项目中引入itext相关的包，可能会导致中文不显示。

2.使用itext

依赖

<dependency><groupId>com.itextpdf</groupId><artifactId>html2pdf</artifactId><version>3.0.3</version>
</dependency>

template.html

java代码

import com.itextpdf.html2pdf.ConverterProperties;
import com.itextpdf.html2pdf.HtmlConverter;
import com.itextpdf.html2pdf.resolver.font.DefaultFontProvider;
import com.itextpdf.layout.font.FontProvider;import java.io.*;public class HtmlToPdf {private static final String resourcesDir = System.getProperty("user.dir") + "/src/main/resources";public void htmlToPdf() throws Exception {String path = resourcesDir + "/template/template.html";String destPath = resourcesDir + "/template/template.pdf";ConverterProperties converterProperties = new ConverterProperties();FontProvider dfp = new DefaultFontProvider();//添加字体库dfp.addDirectory("C:/Windows/Fonts");converterProperties.setFontProvider(dfp);try (InputStream in = new FileInputStream(new File(path)); OutputStream out = new FileOutputStream(new File(destPath))){HtmlConverter.convertToPdf(in, out, converterProperties);}catch (Exception e){e.printStackTrace();}}public static void main(String[] args) throws Exception {new HtmlToPdf().htmlToPdf();}
}

生成的pdf跟上面的差不多

注意事项：

1. html中无需规定字体，在代码中可以导入本地的字体库或者使用特定的字体库。

代码路径：

https://github.com/anyueStarrysky/javaBasicTest