天天被催要吧富文本的内容导出来，以前的做法就是标签一去，文本导出，现在不一样了正文，标题，图片都要不同的显示出来，最复杂的还是图片的处理，废话不多说开搞
主要使用的依赖
implementation 'org.jsoup:jsoup:1.+'
implementation 'org.apache.poi:poi-ooxml:5.2.+'
代码干货
1. 导出方法
public ResponseEntity<byte[]> exportNews(Demo demo) {
XWPFDocument document = new XWPFDocument();
// 设置页边距，数字单位厘米，自动换算
HTWConverter.pageMar(document,
HTWConverter.pageMarConvert(2.8),
HTWConverter.pageMarConvert(2.6),
HTWConverter.pageMarConvert(3.7),
HTWConverter.pageMarConvert(3.5));
XWPFParagraph timestampParagraph = document.createParagraph();
timestampParagraph.setAlignment(CENTER);
XWPFRun timestampRun = timestampParagraph.createRun();
timestampRun.setFontFamily("小标宋");
timestampRun.setFontSize(22);
timestampRun.setText(StringUtils.hasLength(demo.getTitle()) ? demo.getTitle() : "");
HTWConverter.processHtmlContent(document, demo.getContent());
String title = demo.getTitle();
if (StringUtils.hasLength(title)) {
int length = title.length();
title = length >= 11 ? title.substring(0, 10) : title;
} else {
title = "未命名新闻";
}
return Mono.just(ResponseEntity.ok().contentType(MediaType.APPLICATION_OCTET_STREAM)
.header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" +
URLEncoder.encode(title + ".docx", StandardCharsets.UTF_8) + "\"")
.body(HTWConverter.readDoc(document)));
}
2. 核心工具
/**
* HTW html to word
* html富文本内容转word
*
* @author <a href="https://github.com/motcs">motcs</a>
* @since 2024-03-26 星期二
*/
@Log4j2
@Service
public class HTWConverter {
/**
* 读取文档
*
* @param document 写好的文档
* @return 返回文档的字节码
*/
public static byte[] readDoc(XWPFDocument document) {
try {
DefaultDataBuffer dataBuffer = new DefaultDataBufferFactory()
.allocateBuffer(1024);
document.write(dataBuffer.asOutputStream());
return dataBuffer.asInputStream().readAllBytes();
} catch (IOException e) {
log.info("文档转换流失败，读取字节发生错误：{}", e.getMessage());
throw new RuntimeException("文档转换流失败，读取字节发生错误：" + e.getMessage());
}
}
/**
* 设置文档的页边距，单位为厘米是需要使用pageMarConvert 方法转换
* pageMarConvert(3.8) 转换的结果，等于实际文档的3.8厘米
*
* @param document 文档
* @param left 左边距
* @param right 右边距
* @param top 上边距
* @param bottom 下边距
*/
public static void pageMar(XWPFDocument document, long left, long right, long top, long bottom) {
CTPageMar pageMar = document.getDocument().getBody().addNewSectPr().addNewPgMar();
pageMar.setLeft(BigInteger.valueOf(left));
pageMar.setRight(BigInteger.valueOf(right));
pageMar.setTop(BigInteger.valueOf(top));
pageMar.setBottom(BigInteger.valueOf(bottom));
}
/**
* 页边距单位换算，换算后单位厘米
*
* @param value 边距
* @return 返回换算后的数值
*/
public static long pageMarConvert(double value) {
return (long) ((value / 2.54) * 1440);
}
/**
* 解析数据
*
* @param document 插入的文档
* @param htmlContent 需要解析的内容
*/
public static void processHtmlContent(XWPFDocument document, String htmlContent) {
Document doc = Jsoup.parse(htmlContent);
Elements elements = doc.select("p, img, h1");
for (Element element : elements) {
if (element.tagName().equals("p")) {
addParagraphToDocument(document, element.text());
} else if (element.tagName().equals("img")) {
addImageToDocument(document, ImageUrl.builder().url(element.attr("src")).build());
} else if (element.tagName().equals("h1")) {
addParagraphH1ToDocument(document, element.text());
}
}
}
/**
* 插入正文，字体 仿宋GB2312 字号： 三号
*
* @param document 文档
* @param text 正文内容
*/
public static void addParagraphToDocument(XWPFDocument document, String text) {
XWPFParagraph paragraph = document.createParagraph();
XWPFRun run = paragraph.createRun();
run.setText(text);
run.setFontSize(16);
run.setFontFamily("仿宋GB2312");
Double fontSizeAsDouble = run.getFontSizeAsDouble();
paragraph.setIndentationFirstLine(ObjectUtils.isEmpty(fontSizeAsDouble) ?
420 : fontSizeAsDouble.intValue() * 2 * 20);
}
/**
* 设置标题
*
* @param document 文档
* @param text 标题
*/
public static void addParagraphH1ToDocument(XWPFDocument document, String text) {
XWPFParagraph paragraph = document.createParagraph();
XWPFRun run = paragraph.createRun();
run.setText(text);
run.setFontSize(16);
run.setFontFamily("黑体");
}
/**
* 文档增加图片
*
* @param document 文档
* @param image1 图片信息
*/
public static void addImageToDocument(XWPFDocument document, ImageUrl image1) {
String imageUrl = image1.getUrl();
try {
BufferedImage image = ImageIO.read(new URL(imageUrl));
String fileExtension = imageUrl.substring(imageUrl.lastIndexOf('.') + 1);
log.info("图片后缀: {}", fileExtension);
ByteArrayOutputStream os = new ByteArrayOutputStream();
ImageIO.write(image, fileExtension, os);
try (InputStream is = new ByteArrayInputStream(os.toByteArray())) {
XWPFParagraph paragraph = document.createParagraph();
XWPFRun run = paragraph.createRun();
run.addPicture(is, PICTURE_TYPE_JPEG, "image." + fileExtension,
(int) Math.rint(image1.getWidth() * Units.EMU_PER_CENTIMETER),
(int) Math.rint(image1.getHeight() * Units.EMU_PER_CENTIMETER));
} catch (InvalidFormatException e) {
log.info("图片路径：{}，解析失败：{}", imageUrl, e.getMessage());
addParagraphToDocument(document,"");
addParagraphToDocument(document, "解析图片失败!"+imageUrl);
addParagraphToDocument(document,"");
}
} catch (Exception e) {
log.info("下载图片失败:{}", e.getMessage());
addParagraphToDocument(document,"");
addParagraphToDocument(document, "下载图片失败!"+imageUrl);
addParagraphToDocument(document,"");
}
}
}
3. 使用到的工具类
/**
* @author <a href="https://github.com/motcs">motcs</a>
* @since 2024-03-26 星期二
*/
@Data
@Builder
public class ImageUrl implements Serializable {
/**
* 图片地址
*/
private String url;
/**
* 图片宽度默认16.2
*/
private double width;
/**
* 图片高度默认10.01
*/
private double height;
public double getWidth() {
return width > 0 ? width : 16.2;
}
public double getHeight() {
return height > 0 ? height : 10.01;
}
}
好啦，到这里基本差不多了，样式那些就自己调整了。还可以有更多的扩展，这里仅仅只是做一个简单的示例。