主要有以下几点：
1、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: /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
主要有以下几点：1）引入pom.xml依赖2) word文档导入带样式(含图片)Controller层service层HtmlUtil工具类 3) 富文本导出word文档(含图片)Controller层Service层1）引入pom.xml依赖
<!--处理富文本导出导入word文档，勿修改依赖--><dependency><groupId>org.apache.poi</groupId><artifactId>poi</artifactId><version>4.1.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-ooxml-schemas</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>fr.opensagres.xdocreport</groupId><artifactId>xdocreport</artifactId><version>2.0.2</version></dependency><dependency><groupId>org.apache.poi</groupId><artifactId>poi-scratchpad</artifactId><version>4.1.2</version></dependency><dependency><groupId>io.github.draco1023</groupId><artifactId>poi-tl-ext</artifactId><version>0.4.2</version></dependency><dependency><groupId>org.jsoup</groupId><artifactId>jsoup</artifactId><version>1.15.3</version></dependency><!--解决ImageIO.read读取不了webp格式--><dependency><groupId>com.github.nintha</groupId><artifactId>webp-imageio-core</artifactId><version>0.1.0</version><!--第一次先取消下面两行注释，加载成功后，在恢复注释，并重新加载--><!--<scope>system</scope>--><!--<systemPath>${project.basedir}/libs/webp-imageio-core-0.1.0.jar</systemPath>--></dependency>
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<CaseInfoVO> 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<Map<String, String>> 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("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span></p>");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<File> files) {List<String> 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/*** 下载到本地路径* @param file* @return* @throws IOException*/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;}/*** 创建FileItem* @param file* @param fieldName* @return*/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;/*** @author: muyangren* @Date: /12/14* @Description: * @Version: 1.0*/public class HtmlUtil {/*** 通过正则表达式去获取html中的src** @param content* @return*/public static List<String> regexMatchPicture(String content) {//用来存储获取到的图片地址List<String> srcList = new ArrayList<>();//匹配字符串中的img标签Pattern p = pile("<(img|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 = pile("(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;}/*** 通过正则表达式去获取html中的src中的宽高** @param content* @return*/public static List<HashMap<String, String>> regexMatchWidthAndHeight(String content) {//用来存储获取到的图片地址List<HashMap<String, String>> srcList = new ArrayList<>();//匹配字符串中的img标签Pattern p = pile("<(img|IMG)(.*?)(>|></img>|/>)");//匹配字符串中的style标签中的宽高String regexWidth = "width:(?<width>\\d+([.]\\d+)?)(px|pt)";String regexHeight = "height:(?<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<String, String> 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 = pile(regexWidth);Matcher matcher2 = srcText.matcher(group);String imgWidth = null;String imgHeight = null;if (matcher2.find()) {imgWidth = matcher2.group("width");}srcText = pile(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<String, String> 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 (pareTo(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: /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
@Overridepublic void downloadTemplate(HttpServletResponse response, CaseInfoDTO caseInfoDTO) {try {//查询需要导入的数据List<CaseInfoVO> 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<String, Object> 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();pile(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<HashMap<String, String>> imagesFiles = HtmlUtil.regexMatchWidthAndHeight(content);if (Func.isNotEmpty(imagesFiles)) {for (HashMap<String, String> imagesFile : imagesFiles) {String newFileUrl = imagesFile.get("newFileUrl");String fileUrl = imagesFile.get("fileUrl");if (Func.isNotEmpty(newFileUrl)){content = content.replace(fileUrl, newFileUrl);}}}return content;}
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