java使用itextpdf实现html转pdf

maven依赖

<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>html2pdf</artifactId>
    <version>3.0.2</version>
</dependency>
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>layout</artifactId>
    <version>7.1.16</version>
</dependency>
<dependency>
    <groupId>com.itextpdf</groupId>
    <artifactId>kernel</artifactId>
    <version>7.1.16</version>
</dependency>
<dependency>
    <groupId>com.lowagie</groupId>
    <artifactId>itext</artifactId>
    <version>2.1.7</version>
</dependency>
<dependency>
    <groupId>org.jsoup</groupId>
    <artifactId>jsoup</artifactId>
    <version>1.14.3</version>
</dependency>

import cn.hutool.core.io.FileUtil;
import com.itextpdf.html2pdf.ConverterProperties;
import com.itextpdf.html2pdf.HtmlConverter;
import com.itextpdf.html2pdf.resolver.font.DefaultFontProvider;
import com.itextpdf.kernel.geom.PageSize;
import com.itextpdf.kernel.pdf.PdfDocument;
import com.itextpdf.kernel.pdf.PdfWriter;
import com.itextpdf.layout.font.FontProvider;

import java.io.*;

public class PdfItextDemo {
    public static void main(String[] args) {
        String htmlurl = "D:456.htm";
        String pdfPath = "D:/doctopng/123.pdf";
        File file = new File(pdfPath);

        String readString = FileUtil.readString(htmlurl, "utf-8");
        try(OutputStream outputStream = new FileOutputStream(file)) {
            // 转换 HTML to PDF
            PdfWriter writer = new PdfWriter(outputStream);
            PdfDocument pdfDocument = new PdfDocument(writer);
            // 设置PDF大小
            pdfDocument.setDefaultPageSize(PageSize.A3);
            // 设置中文
            ConverterProperties converterProperties = new ConverterProperties();
            FontProvider fontProvider = new DefaultFontProvider(true, true, true);
            converterProperties.setFontProvider(fontProvider);
            // html转换PDF
            HtmlConverter.convertToPdf(readString, pdfDocument, converterProperties);
            // 关闭
            pdfDocument.close();
        } catch (Exception e){
            e.fillInStackTrace();
        }
    }
}