java html转word含图片

Java HTML转Word含图片的实现

引言

在实际开发中，我们经常需要将HTML内容转换为Word文档，并且保留其中的图片。本文将介绍如何使用Java实现这个功能，并提供相应的代码示例。

准备工作

在开始编写代码之前，我们需要先进行一些准备工作。

导入依赖

首先，我们需要导入相关的依赖库。在本次实现中，我们将使用Apache POI和JSoup来处理Word和HTML文档。在pom.xml文件中添加以下依赖：

<dependencies>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi</artifactId>
        <version>4.1.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-ooxml</artifactId>
        <version>4.1.2</version>
    </dependency>
    <dependency>
        <groupId>org.jsoup</groupId>
        <artifactId>jsoup</artifactId>
        <version>1.13.1</version>
    </dependency>
</dependencies>

创建工具类

接下来，我们创建一个名为HtmlToWordConverter的工具类，用于将HTML转换为Word文档。在该类中，我们定义了一个静态方法convert，接受HTML字符串作为输入，并返回对应的Word文档。以下是该工具类的代码：

import org.apache.poi.xwpf.usermodel.*;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class HtmlToWordConverter {

    public static XWPFDocument convert(String html) throws IOException {
        // Create a new Word document
        XWPFDocument document = new XWPFDocument();

        // Parse the HTML content
        Document doc = Jsoup.parse(html);

        // Process the HTML elements
        Elements elements = doc.body().children();
        for (Element element : elements) {
            processElement(document, element);
        }

        return document;
    }

    private static void processElement(XWPFDocument document, Element element) throws IOException {
        // Handle different types of HTML elements
        String tagName = element.tagName();
        if (tagName.equals("p")) {
            // Paragraph element
            XWPFParagraph paragraph = document.createParagraph();
            processChildren(paragraph, element);
        } else if (tagName.equals("h1") || tagName.equals("h2") || tagName.equals("h3")) {
            // Heading element
            XWPFParagraph paragraph = document.createParagraph();
            paragraph.setStyle(tagName.toLowerCase());
            processChildren(paragraph, element);
        } else if (tagName.equals("img")) {
            // Image element
            String src = element.attr("src");
            InputStream inputStream = new ByteArrayInputStream(getImageData(src));
            XWPFParagraph paragraph = document.createParagraph();
            XWPFRun run = paragraph.createRun();
            run.addPicture(inputStream, XWPFDocument.PICTURE_TYPE_PNG, "image.png", Units.toEMU(400), Units.toEMU(300));
            inputStream.close();
        }
    }

    private static void processChildren(XWPFParagraph paragraph, Element element) {
        // Process the child elements recursively
        for (Element child : element.children()) {
            String tagName = child.tagName();
            if (tagName.equals("a")) {
                // Hyperlink element
                XWPFHyperlink hyperlink = paragraph.getDocument().getHyperlinkByID(paragraph.getDocument().getNextHyperlinkId());
                if (hyperlink == null) {
                    hyperlink = paragraph.getDocument().createHyperlink();
                }
                hyperlink.setAnchor(child.attr("href"));
                processChildren(hyperlink.createParagraph(), child);
            } else if (tagName.equals("b")) {
                // Bold element
                XWPFRun run = paragraph.createRun();
                run.setBold(true);
                processChildren(run, child);
            } else {
                // Normal text element
                processChildren(paragraph.createRun(), child);
            }
        }
    }

    private static void processChildren(XWPFRun run, Element element) {
        // Process the child elements recursively
        for (Element child : element.children()) {
            String tagName = child.tagName();
            if (tagName.equals("br")) {
                // Line break element
                run.addBreak();
            } else {
                // Normal text element
                run.setText(child.text());
            }
        }
    }

    private static byte[] getImageData(String src) throws IOException {
        // Load the image from the URL
        InputStream inputStream = new URL(src).openStream();
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        byte[] buffer = new byte[4096];
        int length;
        while ((length = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer