html可以转换成word_html显示word文档

全栈程序员站长

发布于 2022-11-08 10:05:18

7.9K0

发布于 2022-11-08 10:05:18

文章被收录于专栏：全栈程序员必看

大家好，又见面了，我是你们的朋友全栈君。

项目后端使用了springboot，maven，前端使用了ckeditor富文本编辑器。目前从html转换的word为doc格式，而图片处理支持的是docx格式，所以需要手动把doc另存为docx，然后才可以进行图片替换。

一.添加maven依赖

主要使用了以下和poi相关的依赖，为了便于获取html的图片元素，还使用了jsoup：

<dependency>    <groupId>org.apache.poi</groupId>    <artifactId>poi</artifactId>    <version>3.14</version></dependency><dependency>    <groupId>org.apache.poi</groupId>    <artifactId>poi-scratchpad</artifactId>    <version>3.14</version></dependency><dependency>    <groupId>org.apache.poi</groupId>    <artifactId>poi-ooxml</artifactId>    <version>3.14</version></dependency><dependency>    <groupId>fr.opensagres.xdocreport</groupId>    <artifactId>xdocreport</artifactId>    <version>1.0.6</version></dependency><dependency>    <groupId>org.apache.poi</groupId>    <artifactId>poi-ooxml-schemas</artifactId>    <version>3.14</version></dependency><dependency>    <groupId>org.apache.poi</groupId>    <artifactId>ooxml-schemas</artifactId>    <version>1.3</version></dependency><dependency>    <groupId>org.jsoup</groupId>    <artifactId>jsoup</artifactId>    <version>1.11.3</version></dependency>

二.word转换为html

在springboot项目的resources目录下新建static文件夹，将需要转换的word文件temp.docx粘贴进去，由于static是springboot的默认资源文件，所以不需要在配置文件里面另行配置了，如果改成其他名字，需要在application.yml进行相应配置。

doc格式转换为html：

public static String docToHtml() throws Exception {
    File path = new File(ResourceUtils.getURL("classpath:").getPath());
    String imagePathStr = path.getAbsolutePath() + "\\static\\image\\";
    String sourceFileName = path.getAbsolutePath() + "\\static\\test.doc";
    String targetFileName = path.getAbsolutePath() + "\\static\\test2.html";
    File file = new File(imagePathStr);    if(!file.exists()) {
        file.mkdirs();
    }
    HWPFDocument wordDocument = new HWPFDocument(new FileInputStream(sourceFileName));
    org.w3c.dom.Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument();
    WordToHtmlConverter wordToHtmlConverter = new WordToHtmlConverter(document);    //保存图片，并返回图片的相对路径
    wordToHtmlConverter.setPicturesManager((content, pictureType, name, width, height) -> {        try (FileOutputStream out = new FileOutputStream(imagePathStr + name)) {
            out.write(content);
        } catch (Exception e) {
            e.printStackTrace();
        }        return "image/" + name;
    });    wordToHtmlConverter.processDocument(wordDocument);    org.w3c.dom.Document htmlDocument = wordToHtmlConverter.getDocument();    DOMSource domSource = new DOMSource(htmlDocument);    StreamResult streamResult = new StreamResult(new File(targetFileName));    TransformerFactory tf = TransformerFactory.newInstance();    Transformer serializer = tf.newTransformer();    serializer.setOutputProperty(OutputKeys.ENCODING, "utf-8");    serializer.setOutputProperty(OutputKeys.INDENT, "yes");    serializer.setOutputProperty(OutputKeys.METHOD, "html");    serializer.transform(domSource, streamResult);    return targetFileName;
}123456789101112131415161718192021222324252627282930313233

docx格式转换为html

public static String docxToHtml() throws Exception {
    File path = new File(ResourceUtils.getURL("classpath:").getPath());
    String imagePath = path.getAbsolutePath() + "\\static\\image";
    String sourceFileName = path.getAbsolutePath() + "\\static\\test.docx";
    String targetFileName = path.getAbsolutePath() + "\\static\\test.html";

    OutputStreamWriter outputStreamWriter = null;    try {
        XWPFDocument document = new XWPFDocument(new FileInputStream(sourceFileName));
        XHTMLOptions options = XHTMLOptions.create();        // 存放图片的文件夹
        options.setExtractor(new FileImageExtractor(new File(imagePath)));        // html中图片的路径
        options.URIResolver(new BasicURIResolver("image"));
        outputStreamWriter = new OutputStreamWriter(new FileOutputStream(targetFileName), "utf-8");
        XHTMLConverter xhtmlConverter = (XHTMLConverter) XHTMLConverter.getInstance();
        xhtmlConverter.convert(document, outputStreamWriter, options);
    } finally {        if (outputStreamWriter != null) {
            outputStreamWriter.close();
        }
    }    return targetFileName;
}

转换成功后会生成对应的html文件，如果想在前端展示，直接读取文件转换为String返回给前端即可。

public static String readfile(String filePath) {
    File file = new File(filePath);
    InputStream input = null;    try {
        input = new FileInputStream(file);
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }
    StringBuffer buffer = new StringBuffer();    byte[] bytes = new byte[1024];    try {        for (int n; (n = input.read(bytes)) != -1;) {
            buffer.append(new String(bytes, 0, n, "utf8"));
        }
    } catch (IOException e) {
        e.printStackTrace();
    }    return buffer.toString();
}

在富文本编辑器ckeditor中的显示效果：

三.html转换为word

实现思路就是先把html中的所有图片元素提取出来，统一替换为变量字符”${imgReplace}“，如果多张图片，可以依序排列下去，之后生成对应的doc文件（之前试过直接生成docx文件发现打不开，这个问题尚未找到好的解决方法），我们将其另存为docx文件，之后就可以替换变量为图片了：

public static String writeWordFile(String content) {
       String path = "D:/wordFile";
       Map<String, Object> param = new HashMap<String, Object>();
       if (!"".equals(path)) {
           File fileDir = new File(path);
           if (!fileDir.exists()) {
               fileDir.mkdirs();
           }
           content = HtmlUtils.htmlUnescape(content);
           List<HashMap<String, String>> imgs = getImgStr(content);
           int count = 0;
           for (HashMap<String, String> img : imgs) {
               count++;
               //处理替换以“/>”结尾的img标签
               content = content.replace(img.get("img"), "${imgReplace" + count + "}");
               //处理替换以“>”结尾的img标签
               content = content.replace(img.get("img1"), "${imgReplace" + count + "}");
               Map<String, Object> header = new HashMap<String, Object>();
               try {
                   File filePath = new File(ResourceUtils.getURL("classpath:").getPath());
                   String imagePath = filePath.getAbsolutePath() + "\\static\\";
                   imagePath += img.get("src").replaceAll("/", "\\\\");
                   //如果没有宽高属性，默认设置为400*300
                   if(img.get("width") == null || img.get("height") == null) {
                       header.put("width", 400);
                       header.put("height", 300);
                   }else {
                       header.put("width", (int) (Double.parseDouble(img.get("width"))));
                       header.put("height", (int) (Double.parseDouble(img.get("height"))));
                   }
                   header.put("type", "jpg");
                   header.put("content", OfficeUtil.inputStream2ByteArray(new FileInputStream(imagePath), true));
               } catch (FileNotFoundException e) {
                   e.printStackTrace();
               }
               param.put("${imgReplace" + count + "}", header);
           }
           try {
               // 生成doc格式的word文档，需要手动改为docx
               byte by[] = content.getBytes("UTF-8");
               ByteArrayInputStream bais = new ByteArrayInputStream(by);
               POIFSFileSystem poifs = new POIFSFileSystem();
               DirectoryEntry directory = poifs.getRoot();
               DocumentEntry documentEntry = directory.createDocument("WordDocument", bais);
               FileOutputStream ostream = new FileOutputStream("D:\\wordFile\\temp.doc");
               poifs.writeFilesystem(ostream);
               bais.close();
               ostream.close();
               // 临时文件（手动改好的docx文件）
               CustomXWPFDocument doc = OfficeUtil.generateWord(param, "D:\\wordFile\\temp.docx");
               //最终生成的带图片的word文件
               FileOutputStream fopts = new FileOutputStream("D:\\wordFile\\final.docx");
               doc.write(fopts);
               fopts.close();
           } catch (Exception e) {
               e.printStackTrace();
           }
       }
       return "D:/wordFile/final.docx";
   }
   //获取html中的图片元素信息
   public static List<HashMap<String, String>> getImgStr(String htmlStr) {
       List<HashMap<String, String>> pics = new ArrayList<HashMap<String, String>>();
       Document doc = Jsoup.parse(htmlStr);
       Elements imgs = doc.select("img");
       for (Element img : imgs) {
           HashMap<String, String> map = new HashMap<String, String>();
           if(!"".equals(img.attr("width"))) {
               map.put("width", img.attr("width").substring(0, img.attr("width").length() - 2));
           }
           if(!"".equals(img.attr("height"))) {
               map.put("height", img.attr("height").substring(0, img.attr("height").length() - 2));
           }
           map.put("img", img.toString().substring(0, img.toString().length() - 1) + "/>");
           map.put("img1", img.toString());
           map.put("src", img.attr("src"));
           pics.add(map);
       }
       return pics;
   }

OfficeUtil工具类，之前发现网上的写法只支持一张图片的修改，多张图片就会报错，是因为添加了图片，processParagraphs方法中的runs的大小改变了，会报ArrayList的异常，就和我们循环list中删除元素会报异常道理一样，解决方法就是复制一个新的Arraylist进行循环即可：

package com.example.demo.util;  
import java.io.ByteArrayInputStream;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import java.util.Map;import java.util.Map.Entry;import org.apache.poi.POIXMLDocument;import org.apache.poi.hwpf.extractor.WordExtractor;import org.apache.poi.openxml4j.opc.OPCPackage;import org.apache.poi.xwpf.usermodel.XWPFParagraph;import org.apache.poi.xwpf.usermodel.XWPFRun;import org.apache.poi.xwpf.usermodel.XWPFTable;import org.apache.poi.xwpf.usermodel.XWPFTableCell;import org.apache.poi.xwpf.usermodel.XWPFTableRow;  
/** 
* 适用于word 2007
*/  public class OfficeUtil {  
   /** 
    * 根据指定的参数值、模板，生成 word 文档 
    * @param param 需要替换的变量 
    * @param template 模板 
    */  
   public static CustomXWPFDocument generateWord(Map<String, Object> param, String template) {  
       CustomXWPFDocument doc = null;        try {  
           OPCPackage pack = POIXMLDocument.openPackage(template);  
           doc = new CustomXWPFDocument(pack);  
           if (param != null && param.size() > 0) {  
               //处理段落  
               List<XWPFParagraph> paragraphList = doc.getParagraphs();  
               processParagraphs(paragraphList, param, doc);  
               //处理表格  
               Iterator<XWPFTable> it = doc.getTablesIterator();  
               while (it.hasNext()) {
                   XWPFTable table = it.next();  
                   List<XWPFTableRow> rows = table.getRows();  
                   for (XWPFTableRow row : rows) {  
                       List<XWPFTableCell> cells = row.getTableCells();  
                       for (XWPFTableCell cell : cells) {  
                           List<XWPFParagraph> paragraphListTable =  cell.getParagraphs();  
                           processParagraphs(paragraphListTable, param, doc);  
                       }  
                   }  
               }  
           }  
       } catch (Exception e) {  
           e.printStackTrace();  
       }  
       return doc;  
   }  
   /** 
    * 处理段落 
    * @param paragraphList 
    */  
   public static void processParagraphs(List<XWPFParagraph> paragraphList,Map<String, Object> param,CustomXWPFDocument doc){  
       if(paragraphList != null && paragraphList.size() > 0){  
           for(XWPFParagraph paragraph:paragraphList){                //poi转换过来的行间距过大，需要手动调整                if(paragraph.getSpacingBefore() >= 1000 || paragraph.getSpacingAfter() > 1000) {
                   paragraph.setSpacingBefore(0);
                   paragraph.setSpacingAfter(0);
               }                //设置word中左右间距
               paragraph.setIndentationLeft(0);
               paragraph.setIndentationRight(0);
               List<XWPFRun> runs = paragraph.getRuns();                //加了图片，修改了paragraph的runs的size，所以循环不能使用runs
               List<XWPFRun> allRuns = new ArrayList<XWPFRun>(runs);                for (XWPFRun run : allRuns) {
                   String text = run.getText(0);  
                   if(text != null){                        boolean isSetText = false;  
                       for (Entry<String, Object> entry : param.entrySet()) {  
                           String key = entry.getKey();  
                           if(text.indexOf(key) != -1){  
                               isSetText = true;  
                               Object value = entry.getValue();  
                               if (value instanceof String) {//文本替换  
                                   text = text.replace(key, value.toString());  
                               } else if (value instanceof Map) {//图片替换  
                                   text = text.replace(key, "");  
                                   Map pic = (Map)value;  
                                   int width = Integer.parseInt(pic.get("width").toString());  
                                   int height = Integer.parseInt(pic.get("height").toString());  
                                   int picType = getPictureType(pic.get("type").toString());  
                                   byte[] byteArray = (byte[]) pic.get("content");  
                                   ByteArrayInputStream byteInputStream = new ByteArrayInputStream(byteArray);  
                                   try {  
                                       String blipId = doc.addPictureData(byteInputStream,picType);  
                                       doc.createPicture(blipId,doc.getNextPicNameNumber(picType), width, height,paragraph);
                                   } catch (Exception e) {  
                                       e.printStackTrace();  
                                   }  
                               }  
                           }  
                       }  
                       if(isSetText){  
                           run.setText(text,0);  
                       }  
                   }  
               }  
           }  
       }  
   }  
   /** 
    * 根据图片类型，取得对应的图片类型代码 
    * @param picType 
    * @return int 
    */  
   private static int getPictureType(String picType){  
       int res = CustomXWPFDocument.PICTURE_TYPE_PICT;  
       if(picType != null){  
           if(picType.equalsIgnoreCase("png")){  
               res = CustomXWPFDocument.PICTURE_TYPE_PNG;  
           }else if(picType.equalsIgnoreCase("dib")){  
               res = CustomXWPFDocument.PICTURE_TYPE_DIB;  
           }else if(picType.equalsIgnoreCase("emf")){  
               res = CustomXWPFDocument.PICTURE_TYPE_EMF;  
           }else if(picType.equalsIgnoreCase("jpg") || picType.equalsIgnoreCase("jpeg")){  
               res = CustomXWPFDocument.PICTURE_TYPE_JPEG;  
           }else if(picType.equalsIgnoreCase("wmf")){  
               res = CustomXWPFDocument.PICTURE_TYPE_WMF;  
           }  
       }  
       return res;  
   }  
   /** 
    * 将输入流中的数据写入字节数组 
    * @param in 
    * @return 
    */  
   public static byte[] inputStream2ByteArray(InputStream in,boolean isClose){  
       byte[] byteArray = null;  
       try {  
           int total = in.available();  
           byteArray = new byte[total];  
           in.read(byteArray);  
       } catch (IOException e) {  
           e.printStackTrace();  
       }finally{  
           if(isClose){  
               try {  
                   in.close();  
               } catch (Exception e2) {  
                   System.out.println("关闭流失败");  
               }  
           }  
       }  
       return byteArray;  
   }  
}

我认为之所以word2003不支持图片替换，主要是处理2003版本的HWPFDocument对象被声明为了final，我们就无法重写他的方法了。而处理2007版本的类为XWPFDocument，是可以继承的，通过继承XWPFDocument，重写createPicture方法即可实现图片替换，以下为对应的CustomXWPFDocument类：

package com.example.demo.util;    
import java.io.IOException;  
import java.io.InputStream;  
import org.apache.poi.openxml4j.opc.OPCPackage;  
import org.apache.poi.xwpf.usermodel.XWPFDocument;  
import org.apache.poi.xwpf.usermodel.XWPFParagraph;  
import org.apache.xmlbeans.XmlException;  
import org.apache.xmlbeans.XmlToken;  
import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualDrawingProps;  
import org.openxmlformats.schemas.drawingml.x2006.main.CTPositiveSize2D;  
import org.openxmlformats.schemas.drawingml.x2006.wordprocessingDrawing.CTInline;  
/** 
* 自定义 XWPFDocument，并重写 createPicture()方法 
*/  public class CustomXWPFDocument extends XWPFDocument {    
   public CustomXWPFDocument(InputStream in) throws IOException {    
       super(in);    
   }    
   public CustomXWPFDocument() {    
       super();    
   }    
   public CustomXWPFDocument(OPCPackage pkg) throws IOException {    
       super(pkg);    
   }    
   /** 
    * @param ind 
    * @param width 宽 
    * @param height 高 
    * @param paragraph  段落 
    */  
   public void createPicture(String blipId, int ind, int width, int height,XWPFParagraph paragraph) {    
       final int EMU = 9525;    
       width *= EMU;    
       height *= EMU;    
       CTInline inline = paragraph.createRun().getCTR().addNewDrawing().addNewInline();    
       String picXml = ""    
               + "<a:graphic xmlns:a=\"http://schemas.openxmlformats.org/drawingml/2006/main\">"    
               + "   <a:graphicData uri=\"http://schemas.openxmlformats.org/drawingml/2006/picture\">"    
               + "      <pic:pic xmlns:pic=\"http://schemas.openxmlformats.org/drawingml/2006/picture\">"    
               + "         <pic:nvPicPr>" + "            <pic:cNvPr id=\""    
               + ind    
               + "\" name=\"Generated\"/>"    
               + "            <pic:cNvPicPr/>"    
               + "         </pic:nvPicPr>"    
               + "         <pic:blipFill>"    
               + "            <a:blip r:embed=\""    
               + blipId    
               + "\" xmlns:r=\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\"/>"    
               + "            <a:stretch>"    
               + "               <a:fillRect/>"    
               + "            </a:stretch>"    
               + "         </pic:blipFill>"    
               + "         <pic:spPr>"    
               + "            <a:xfrm>"    
               + "               <a:off x=\"0\" y=\"0\"/>"    
               + "               <a:ext cx=\""    
               + width    
               + "\" cy=\""    
               + height    
               + "\"/>"    
               + "            </a:xfrm>"    
               + "            <a:prstGeom prst=\"rect\">"    
               + "               <a:avLst/>"    
               + "            </a:prstGeom>"    
               + "         </pic:spPr>"    
               + "      </pic:pic>"    
               + "   </a:graphicData>" + "</a:graphic>";    
       inline.addNewGraphic().addNewGraphicData();    
       XmlToken xmlToken = null;    
       try {    
           xmlToken = XmlToken.Factory.parse(picXml);    
       } catch (XmlException xe) {    
           xe.printStackTrace();    
       }    
       inline.set(xmlToken);   
       inline.setDistT(0);      
       inline.setDistB(0);      
       inline.setDistL(0);      
       inline.setDistR(0);      
       CTPositiveSize2D extent = inline.addNewExtent();    
       extent.setCx(width);    
       extent.setCy(height);    
       CTNonVisualDrawingProps docPr = inline.addNewDocPr();      
       docPr.setId(ind);      
       docPr.setName("图片" + ind);      
       docPr.setDescr("测试");   
   }    
}

以上就是通过POI实现html和word的相互转换，对于html无法转换为可读的docx这个问题尚未解决，如果大家有好的解决方法可以交流一下~~~

发布者：全栈程序员栈长，转载请注明出处：https://javaforall.cn/182887.html原文链接：https://javaforall.cn

本文参与腾讯云自媒体同步曝光计划，分享自作者个人站点/博客。

原始发表：2022年10月12日，如有侵权请联系 cloudcommunity@tencent.com 删除

html