主要有以下几点：
解决富文本导入导出依赖兼容问题
2、处理富文本和非富文本内容
3、解决webp格式通过java下载不了问题，如果要用到富文本导出，将来势必是会碰到的bug，这里提前给提出来并解决，测试用例中有给图片测试。
4、在原有方法上优化，比如处理等比缩小图片、将图片本地路径，替换为minio或者base64格式
gitee测试用例：
链接: https://gitee.com/muyangrenOvo/word-import-export
注意：与文章代码有出入，但思路是一样的。只是获取文件的方式变了，一个是前端调用组件传的，一个是自己new file。
目录
1）引入pom.xml依赖
org.apache.poi poi 4.1.2 org.apache.poi poi-ooxml-schemas 4.1.2 org.apache.poi poi-ooxml 4.1.2 fr.opensagres.xdocreport xdocreport 2.0.2 org.apache.poi poi-scratchpad 4.1.2 io.github.draco1023 poi-tl-ext 0.4.2 org.jsoup jsoup 1.15.3 com.github.nintha webp-imageio-core 0.1.0 2) word文档导入带样式(含图片)
例如这是word文档，我们要通过波浪线去截取对应内容
Controller层
@ApiLog("导入模板") @PostMapping("/importTemplate") @ApiOperation(value = "导入模板", notes = "传file") public R importCase(@RequestParam MultipartFile file) { return R.data(caseInfoService.importTemplate(file)); } service层
import com.deepoove.poi.XWPFTemplate;import com.deepoove.poi.config.Configure;import com.deepoove.poi.config.ConfigureBuilder;import fr.opensagres.poi.xwpf.converter.core.FileImageExtractor;import fr.opensagres.poi.xwpf.converter.core.FileURIResolver;import fr.opensagres.poi.xwpf.converter.core.XWPFConverterException;import fr.opensagres.poi.xwpf.converter.xhtml.XHTMLConverter;import fr.opensagres.poi.xwpf.converter.xhtml.XHTMLOptions;import org.apache.poi.xwpf.usermodel.XWPFDocument;import org.ddr.poi.html.HtmlRenderPolicy;@Overridepublic CaseInfoVO importTemplate(MultipartFile file){ try { caseInfoVO = new CaseInfoVO(); //1、处理非富文本内容基本信息(讲解的是富文本导入,所以该内容略过) //List> mapList = WordUtil.readWord(file); //assert mapList != null; //dealWithCaseBasicInfo(caseInfoVO, mapList); //2、下载文件到本地 File destFile = fileDownloadToLocalPath(file); //3、处理案例富文本信息 dealWithCaseInfoRichText(caseInfoVO, destFile); //4、替换案例富文本信息中的图片(如果有)路径并删除临时文件和临时图片 dealWithCaseInfoRichTextToPicture(caseInfoVO); } catch (Exception e) { e.printStackTrace(); } return caseInfoVO; } private void dealWithCaseInfoRichText(CaseInfoVO caseInfoVO, File destFile) { if (!destFile.exists()) { throw new ServiceException("导入模板失败,请重新上传！"); } else { //判断是否为docx文件 if (destFile.getName().endsWith(".docx") || destFile.getName().endsWith(".DOCX")) { // 1)加载word文档生成XWPFDocument对象 try (FileInputStream in = new FileInputStream(destFile); XWPFDocument document = new XWPFDocument(in)) { // 2)解析XHTML配置（这里设置IURIResolver来设置图片存放的目录） File imageFolderFile = new File(String.valueOf(destFile.getParentFile())); XHTMLOptions options = XHTMLOptions.create().URIResolver(new FileURIResolver(imageFolderFile)); options.setExtractor(new FileImageExtractor(imageFolderFile)); options.setIgnoreStylesIfUnused(false); options.setFragment(true); //使用字符数组流获取解析的内容 ByteArrayOutputStream baos = new ByteArrayOutputStream(); XHTMLConverter.getInstance().convert(document, baos, options); //带样式的内容(富文本) String conTent = baos.toString(); //通过波浪线分割，然后通过debug去看自己需要的内容的下标位置 然后获取即可(如果不懂，私信) String[] tableSplit = conTent.split("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"); int length = tableSplit.length; //最好是判断下length预期长度，否则模板用于定位的波浪线给破坏了，拿的内容也就变了 caseInfoVO.setCriminalBaseInfoSituation(tableSplit[2]); caseInfoVO.setCriminalEducationTransformPlan(tableSplit[4]); caseInfoVO.setCriminalEducationTransformResult(tableSplit[6]); } } catch (IOException | XWPFConverterException e) { e.printStackTrace(); } finally { FileUtil.deleteQuietly(destFile); } } } } private String dealWithCaseInfoRichTextToPictureChild(String content, OssBuilder ossBuilder,Set files) { List imagesFiles = HtmlUtil.regexMatchPicture(content); if (Func.isNotEmpty(imagesFiles)) { for (String imagesFile : imagesFiles) { File file = new File(imagesFile); MultipartFile fileItem = createFileItem(file, file.getName()); boolean aBoolean = true; //此处选择循环调用，避免minio上传失败返回空(主要看需求)。 while (Boolean.TRUE.equals(aBoolean)) { BladeFile bladeFile = ossBuilder.template().putFile(fileItem); if (Func.isNotEmpty(bladeFile)) { String link = bladeFile.getLink(); content = content.replace(imagesFile, link); //删除临时图片(统一删除 如上传同一张图片，第二次会找不到图片) files.add(file); aBoolean = false; } } } } return content; }//最好是定义一个工具类，这里图看起来比较直观，就单独拿出来了 public File fileDownloadToLocalPath(MultipartFile file) { File destFile = null; try { String fileName = file.getOriginalFilename(); //获取文件后缀 String pref = fileName.lastIndexOf(".") != -1 ? fileName.substring(fileName.lastIndexOf(".") + 1) : null; //临时文件 //临时文件名避免重复 String uuidFile = UUID.randomUUID().toString().replace("-", "") + "." + pref; destFile = new File(FileChangeUtils.getProjectPath() + uuidFile); if (!destFile.getParentFile().exists()) { destFile.getParentFile().mkdirs(); } file.transferTo(destFile); } catch (IOException e) { e.printStackTrace(); } return destFile; }public MultipartFile createFileItem(File file, String fieldName) {FileItemFactory factory = new DiskFileItemFactory(16, null);FileItem item = factory.createItem(fieldName, ContentType.MULTIPART_FORM_DATA.toString(), true, file.getName());int bytesRead = 0;byte[] buffer = new byte[8192];try {FileInputStream fis = new FileInputStream(file);OutputStream os = item.getOutputStream();while ((bytesRead = fis.read(buffer, 0, 8192)) != -1) {os.write(buffer, 0, bytesRead);}os.close();fis.close();} catch (IOException e) {e.printStackTrace();}return new CommonsMultipartFile(item);} HtmlUtil工具类
import java.math.BigDecimal;import java.math.RoundingMode;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.regex.Matcher;import java.util.regex.Pattern;public class HtmlUtil { public static List regexMatchPicture(String content) { //用来存储获取到的图片地址 List srcList = new ArrayList<>(); //匹配字符串中的img标签 Pattern p = Pattern.compile("<(img|IMG)(.*?)(>|>|/>)"); Matcher matcher = p.matcher(content); boolean hasPic = matcher.find(); //判断是否含有图片 if (hasPic) { //如果含有图片，那么持续进行查找，直到匹配不到 while (hasPic) { //获取第二个分组的内容，也就是 (.*?)匹配到的 String group = matcher.group(2); //匹配图片的地址 Pattern srcText = Pattern.compile("(src|SRC)=(\"|\')(.*?)(\"|\')"); Matcher matcher2 = srcText.matcher(group); if (matcher2.find()) { //把获取到的图片地址添加到列表中 srcList.add(matcher2.group(3)); } //判断是否还有img标签 hasPic = matcher.find(); } } return srcList; } public static List> regexMatchWidthAndHeight(String content) { //用来存储获取到的图片地址 List> srcList = new ArrayList<>(); //匹配字符串中的img标签 Pattern p = Pattern.compile("<(img|IMG)(.*?)(>|>|/>)"); //匹配字符串中的style标签中的宽高 String regexWidth = "width:(?\\d+([.]\\d+)?)(px|pt)"; String regexHeight = "height:(?\\d+([.]\\d+)?)(px;|pt;)"; Matcher matcher = p.matcher(content); boolean hasPic = matcher.find(); //判断是否含有图片 if (hasPic) { //如果含有图片，那么持续进行查找，直到匹配不到 while (hasPic) { HashMap hashMap = new HashMap<>(); //获取第二个分组的内容，也就是 (.*?)匹配到的 String group = matcher.group(2); hashMap.put("fileUrl", group); //匹配图片的地址 Pattern srcText = Pattern.compile(regexWidth); Matcher matcher2 = srcText.matcher(group); String imgWidth = null; String imgHeight = null; if (matcher2.find()) { imgWidth = matcher2.group("width"); } srcText = Pattern.compile(regexHeight); matcher2 = srcText.matcher(group); if (matcher2.find()) { imgHeight = matcher2.group("height"); } hashMap.put("width", imgWidth); hashMap.put("height", imgHeight); srcList.add(hashMap); //判断是否还有img标签 hasPic = matcher.find(); } for (HashMap imagesFile : srcList) { String height = imagesFile.get("height"); String width = imagesFile.get("width"); String fileUrl = imagesFile.get("fileUrl"); //1厘米=25px(像素) 17厘米(650px) word最大宽值 if (Func.isNotEmpty(width)) { BigDecimal widthDecimal = new BigDecimal(width); BigDecimal maxWidthWord = new BigDecimal("650.0"); if (widthDecimal.compareTo(maxWidthWord) > 0) { BigDecimal divide = widthDecimal.divide(maxWidthWord, 2, RoundingMode.HALF_UP); fileUrl = fileUrl.replace("width:" + width, "width:" + maxWidthWord); if (Func.isNotEmpty(height)) {BigDecimal heightDecimal = new BigDecimal(height);BigDecimal divide1 = heightDecimal.divide(divide, 1, RoundingMode.HALF_UP);fileUrl = fileUrl.replace("height:" + height, "height:" + divide1); } else {fileUrl = fileUrl.replace("height:auto", "height:350px"); } imagesFile.put("newFileUrl", fileUrl); } else { imagesFile.put("newFileUrl", ""); } } } } return srcList; }} 3) 富文本导出word文档(含图片)
参考文献
链接: https://github.com/draco1023/poi-tl-ext
模板如图所示
Controller层
@ApiLog("模板-下载") @GetMapping("/downloadTemplate") @ApiOperation(value = "模板-下载") public void downloadCaseInfo(HttpServletResponse response,CaseInfoDTO caseInfoDTO) { caseInfoService.downloadTemplate(response,caseInfoDTO); }Service层
@Override public void downloadTemplate(HttpServletResponse response, CaseInfoDTO caseInfoDTO) { try { //查询需要导入的数据 List caseInfoVOS = baseMapper.caseQueryPage(null, null, caseInfoDTO, AuthUtil.getUserId()); CaseInfoVO caseInfoVO = caseInfoVOS.get(0); //处理作者名称 dealWithCaseAuthorName(caseInfoVOS); Integer formatType = caseInfoVO.getFormatType(); org.springframework.core.io.Resource resource; HtmlRenderPolicy htmlRenderPolicy = new HtmlRenderPolicy(); ConfigureBuilder builder = Configure.builder(); Configure config = builder.build(); SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Map data = new HashMap(8); data.put("caseTitle", caseInfoVO.getCaseTitle()); data.put("typeName", caseInfoVO.getTypeName()); resource = new ClassPathResource("document" + File.separator + "word" + File.separator + "导出模板.docx"); config.customPolicy("criminalBaseInfoSituation", htmlRenderPolicy); data.put("criminalBaseInfoSituation", dealWithPictureWidthAndHeight(caseInfoVO.getCriminalBaseInfoSituation())); //输出到浏览器|下载到本地路径 StringBuilder stringBuilder = new StringBuilder(); stringBuilder.append(caseInfoVO.getTenantName()).append("-").append(caseInfoVO.getTypeName()).append("-《").append(caseInfoVO.getCaseTitle()).append("》").append("案例"); response.setContentType("application/octet-stream"); response.setHeader("Content-disposition", "attachment;filename=\"" + new String(stringBuilder.toString().getBytes(StandardCharsets.UTF_8), StandardCharsets.ISO_8859_1) + ".docx" + "\""); OutputStream out = response.getOutputStream(); XWPFTemplate.compile(resource.getInputStream(), config).render(data).writeAndClose(out); out.flush(); out.close(); } catch (IOException e) { e.printStackTrace(); } } //处理图片超过word宽度问题，等比缩小 private String dealWithPictureWidthAndHeight(String content) { List> imagesFiles = HtmlUtil.regexMatchWidthAndHeight(content); if (Func.isNotEmpty(imagesFiles)) { for (HashMap imagesFile : imagesFiles) { String newFileUrl = imagesFile.get("newFileUrl"); String fileUrl = imagesFile.get("fileUrl"); if (Func.isNotEmpty(newFileUrl)){ content = content.replace(fileUrl, newFileUrl); } } } return content; } 如果觉得文章对您有帮助，麻烦点个赞再走哈
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来源地址：https://blog.csdn.net/m0_51706962/article/details/128818754
