一、前言

二、html转图片

1、添加依赖

        <dependency>
            <groupId>org.xhtmlrenderer</groupId>
            <artifactId>flying-saucer-core</artifactId>
            <version>9.1.22</version>
        </dependency>

2、代码示例

(1)测试html文件

<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8"/>
    <title>Title</title>
    <style>
        body {
            font-family: SimSun;
            background: aliceblue;
            margin: 0px;
            padding: 0px;
            margin: 20px 0px;
    </style>





    
</head>
        <a href="https://test-img.yudhabhakti.co.id/bnc-public-bucket/bnc/file/xC3ABZ5mJv28iP_1KaB8Abb6BDOArvPeX-ijVpbjlms.pdf" download="fileName">
    <div style="color:burlywood">
        <table border="1px" cellspacing="0px">
                <th>姓名</th>
                <th>电话</th>
                <td>刘亚楼</td>
                <td>13347293021</td>
        </table>
<script>
</script>
</body>
</html>

(2)代码示例

import org.xhtmlrenderer.simple.Graphics2DRenderer;
import org.xhtmlrenderer.swing.Java2DRenderer;
import org.xhtmlrenderer.util.FSImageWriter;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
public class ImageRender {
    public static void main(String[] args) throws IOException {





    
        String basePath = System.getProperty("user.home") + File.separator + "flyingsaucer";
        File source = new File(basePath, "test.html");
        File orginalDest = new File(basePath, "original.png");
        File g2drDest = new File(basePath, "G2DR.png");
        // 有些css样式不支持，如背景颜色
        Java2DRenderer renderer = new Java2DRenderer(source, 1024);
        renderer.setBufferedImageType(BufferedImage.TYPE_INT_RGB);
        BufferedImage java2dImage = renderer.getImage();
        new FSImageWriter().write(java2dImage, orginalDest.toString());
        // 支持css样式，如背景颜色
        BufferedImage g2drImage = Graphics2DRenderer.renderToImageAutoSize(source.toURI().toURL().toExternalForm(), 1024, BufferedImage.TYPE_INT_ARGB);
        ImageIO.write(g2drImage, "png", g2drDest);
}

3、演示结果

使用Java2DRenderer渲染的 original.png ，可以看到渲染的图片是没有背景颜色的。如下：

使用Graphics2DRenderer渲染的 G2DR.png ，是有背景颜色的，如下：

三、html转pdf

1、添加依赖

        <dependency>
            <groupId>org.xhtmlrenderer</groupId>
            <artifactId>flying-saucer-pdf-itext5</artifactId>
            <version>9.1.22</version>
        </dependency>

2、代码示例

import com.itextpdf.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;
import java.nio.file.Paths;
public class PDFRender {
    public static void main(String[] args) throws Exception {
        String basePath = System.getProperty("user.home") + File.separator + "flyingsaucer";
        String source = Paths.get(basePath, "test.html").toString();
        File dest = Paths.get(basePath, "saucer.pdf").toFile();
        try (OutputStream os = new FileOutputStream(dest)) {
            ITextRenderer renderer = new ITextRenderer();
            ITextFontResolver fontResolver = renderer.getFontResolver();
            // 必须添加能支持中文的字体，否则html内容有中文会不显示，同时body标签要设置font-family: SimSun
            String fontPath = PDFRender.class.getResource("/font/simsun.ttc").getPath();
            fontResolver.addFont(fontPath, BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            renderer.setDocument(new File(source));
            renderer.layout();
            renderer.createPDF(os);
}