java：html转pdf的方法

落叶知秋

人生低谷，唯有自渡。

java：html转pdf的方法

html转为pdf有两种方法：

xhtmlrenderer
itext

1.使用xhtmlrenderer

依赖

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

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

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。
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>

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();