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java实现word导入导出富文本(含图片)-附完整测试用例

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: 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

<!--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
在这里插入图片描述

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;

@Override
public 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: 2022/12/14
 * @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 = Pattern.compile("<(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 = 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;
    }

    /**
     * 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 = Pattern.compile("<(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 = 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<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 (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
在这里插入图片描述

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<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();
            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<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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本文转载自: https://blog.csdn.net/m0_51706962/article/details/128818754
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