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java web实现在线编辑word,并将word导出(二)

时间:2020-02-10 18:28:55      阅读:105      评论:0      收藏:0      [点我收藏+]

标签:base64编码   cat   tables   +=   for   pre   bean   boolean   web   

  前一篇文章介绍了后台将前台html转为word文档的一种方式,但却有一个问题是没法讲图片放置在生成的word报告中。我在网上找了很多方法,甚至将图片转换成base64编码的方式也不成功。效果如下:

技术图片

 

 

   由于本人的水平有限,因此使用其他的实现方式。

   首先介绍一下前台呈现图片的原理:前台ueditor编辑框呈现的图片实际上是一个img变迁,呈现的图片的原始文件是存在服务器上的(甚至在udeitor中直接粘贴图片也是想服务器上传了该图片)。

  技术图片

  对应服务器文件为:技术图片

 

  因此,我的视线思路是先将页面传回后台的html内容中的img标签使用特定的字符替换,直接生成一个文本文档,然后在在对应img标签的位置替换为相应的图片。因为在看网上说不能直接操作doc文档插入图片,需要生成docx文档,于是我又参考网上实现了生成docx的后台代码。

  这次生成word文档使用的是docx4j,插入图片需要引入poi的另一个依赖,所需依赖如下:

        <dependency>
            <groupId>com.deepoove</groupId>
            <artifactId>poi-tl</artifactId>
            <version>1.3.1</version>
        </dependency>

        <dependency>
            <groupId>org.docx4j</groupId>
            <artifactId>docx4j</artifactId>
            <version>3.3.6</version>
        </dependency>
        <dependency>
            <groupId>org.docx4j</groupId>
            <artifactId>docx4j-ImportXHTML</artifactId>
            <version>3.3.6</version>
        </dependency>        

  代码实现如下:

   @RequestMapping("/defectV2/defect/analysis/tranformHtmlToWord")
    @ResponseBody
    public MessageBean tranformHtmlToWordDocx(@RequestParam Map params,HttpServletRequest request, HttpServletResponse response) {
        try {
//            params包含前台传回的html内容
            analysisService.tranformHtmlToWordDocx(params,request,response);
            return new MessageBean("success", "生成报告成功!", null);
        } catch (Exception e) {
            e.printStackTrace();
            utils.WriteSystemLog(sls, "ERROR", "生成报告", "生成报告失败!" + e.getCause());
            return new MessageBean("error", "生成报告失败!", null);
        }
    }
public String tranformHtmlToWordDocx(Map params, HttpServletRequest request, HttpServletResponse response) throws Exception {
String body = (String) params.get("editorValue"); List<String> imgList = new ArrayList<String>(); String imgTag = "";//img标签 String imgRegex = "<img[^>]+/>"; Pattern imgPattern = Pattern.compile(imgRegex,Pattern.CASE_INSENSITIVE); Matcher imgMatcher = imgPattern.matcher(body); int count = 1; while (imgMatcher.find()){ imgTag = imgMatcher.group(); //获取img标签 String srcStr = ""; //获取匹配img标签中的src内容 Matcher srcMatcher = Pattern.compile("src\\s*=\\s*\"?(.*?)(\"|>|\\s+)").matcher(imgTag); while (srcMatcher.find()){ srcStr = srcMatcher.group(1); } String contextPath = request.getContextPath(); String imagePath = ExportWord.getRealPath() + srcStr.substring(srcStr.indexOf(contextPath) + contextPath.length() +1); imgList.add(imagePath); body = body.replace(imgTag,"${img" + count + "}"); count ++; } //html内容(&nbsp;需要被替换,否则导出会报错)
        String unescaped ="<!DOCTYPE html><html><head><title>导出word</title></head><body>" + body.replaceAll("&nbsp;","&#160;&#160;&#160;&#160;")
                +"</body></html>";
        if (unescaped.contains("&lt;/") ) {
            unescaped = StringEscapeUtils.unescapeHtml(unescaped);
        }

        // 创建一个空的docx对象
        WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.createPackage();
        XHTMLImporter importer = new XHTMLImporterImpl(wordMLPackage);
        importer.setTableFormatting(FormattingOption.IGNORE_CLASS);
        importer.setParagraphFormatting(FormattingOption.IGNORE_CLASS);

        NumberingDefinitionsPart ndp = new NumberingDefinitionsPart();
        wordMLPackage.getMainDocumentPart().addTargetPart(ndp);
        ndp.unmarshalDefaultNumbering();

        // 转换XHTML,并将其添加到我们制作的空docx中
        XHTMLImporterImpl XHTMLImporter = new XHTMLImporterImpl(wordMLPackage);

        XHTMLImporter.setHyperlinkStyle("Hyperlink");
        wordMLPackage.getMainDocumentPart().getContent().addAll(
                XHTMLImporter.convert(unescaped,null));
    //ExportWord.getWordPath()是获取项目文件路径
String wordPath
= ExportWord.getWordPath() + new Date().getTime() + "问题分析统计.docx"; wordMLPackage.save(new File(wordPath)); Map<String, Object> testMap = new HashMap<String, Object>(); WordUtils wordUtil=new WordUtils(); if (imgList!=null && imgList.size()>0){ for (int i=0;i<imgList.size();i++){ String imagePath = imgList.get(i); Map map = new HashMap(); //封装的单个图片信息 map = WordUtils.packageImgMessage(imagePath); testMap.put("${img" + (i+1) + "}",map); } } wordUtil.getWord(wordPath,testMap,new ArrayList<String[]>(),"质量分析统计报告.docx",response); return null; }

WordUtil.java实现代码(参考了网上的)

public class WordUtils {

    /**
     * 根据模板生成word
     * @param path     模板的路径
     * @param params   需要替换的参数
     * @param tableList   需要插入的参数
     * @param fileName 生成word文件的文件名
     * @param response
     */
    public void getWord(String path, Map<String, Object> params, List<String[]> tableList, String fileName, HttpServletResponse response) throws Exception {
        File file = new File(path);
        InputStream is = new FileInputStream(file);
        CustomXWPFDocument doc = new CustomXWPFDocument(is);
        this.replaceInPara(doc, params);    //替换文本里面的变量
        this.replaceInTable(doc, params, tableList); //替换表格里面的变量
        OutputStream os = response.getOutputStream();
        response.setHeader("Content-disposition", "attachment; filename=" + URLEncoder.encode(fileName,"utf-8"));
        doc.write(os);
        this.close(os);
        this.close(is);

    }

    /**
     * 替换段落里面的变量
     * @param doc    要替换的文档
     * @param params 参数
     */
    private void replaceInPara(CustomXWPFDocument doc, Map<String, Object> params) {
        Iterator<XWPFParagraph> iterator = doc.getParagraphsIterator();
        XWPFParagraph para;
        while (iterator.hasNext()) {
            para = iterator.next();
            this.replaceInPara(para, params, doc);
        }
    }

    /**
     * 替换段落里面的变量
     *(网络上找到的)
     * @param para   要替换的段落
     * @param params 参数
     */
    private void replaceInParaYuan(XWPFParagraph para, Map<String, Object> params, CustomXWPFDocument doc) {
        List<XWPFRun> runs;
        Matcher matcher;
        if (this.matcher(para.getParagraphText()).find()) {
            runs = para.getRuns();
            int start = -1;
            int end = -1;
            String str = "";
            for (int i = 0; i < runs.size(); i++) {
                XWPFRun run = runs.get(i);
                String runText = run.toString();
                //找出“${”开始的XWPFRun
                if (‘$‘ == runText.charAt(0) && ‘{‘ == runText.charAt(1)) {
                    start = i;
                }
                //若有“${”,则记录开始的XWPFRun
                if ((start != -1)) {
                    str += runText;
                }
                //若有“}”,记录结束的XWPFRun
                if (‘}‘ == runText.charAt(runText.length() - 1)) {
                    if (start != -1) {
                        end = i;
                        break;
                    }
                }
            }

            //${变量}之间的XWPFRun
            for (int i = start; i <= end; i++) {
                para.removeRun(i);
                i--;
                end--;
            }

            for (Map.Entry<String, Object> entry : params.entrySet()) {
                String key = entry.getKey();
                if (str.indexOf(key) != -1) {
                    Object value = entry.getValue();
                    if (value instanceof String) {
                        str = str.replace(key, value.toString());
                        para.createRun().setText(str, 0);
                        break;
                    } else if (value instanceof Map) {
                        str = str.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 {
                            //int ind = doc.addPicture(byteInputStream,picType);
                            //doc.createPicture(ind, width , height,para);
                            doc.addPictureData(byteInputStream, picType);
                            doc.createPicture(doc.getAllPictures().size() - 1, width, height, para);
                            para.createRun().setText(str, 0);
                            break;
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
        }
    }


    /**
     * 替换段落里面的变量
     * (优化后的)
     * @param para   要替换的段落
     * @param params 参数
     */
    private void replaceInPara(XWPFParagraph para, Map<String, Object> params, CustomXWPFDocument doc) {
        List<XWPFRun> runs;
        Matcher matcher;
        String paraText = para.getParagraphText();
        if(matcher(paraText).find()){
            runs = para.getRuns();
            for (int i=0;i<runs.size();i++){
                XWPFRun run = runs.get(i);
                String runText = run.toString();
                matcher = matcher(runText);
                List<String> $StrList = new ArrayList<String>();

                while (matcher.find()){
                    $StrList.add(matcher.group());
                }

                if ($StrList.size()>0){
//                    para.removeRun(i);
                    for (String $Str : $StrList){
                        if (params.containsKey($Str)){
                            Object value = params.get($Str);
                            if (value instanceof String) {
                                runText = runText.replace($Str, value.toString());
//                                para.createRun().setText(runText, 0);
//                                break;
                            } else if (value instanceof Map) {
                                runText = runText.replace($Str, "");
                                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 {
                                    //int ind = doc.addPicture(byteInputStream,picType);
                                    //doc.createPicture(ind, width , height,para);
                                    doc.addPictureData(byteInputStream, picType);
                                    doc.createPicture(doc.getAllPictures().size() - 1, width, height, para);
//                                    para.createRun().setText(runText, 0);
//                                    break;
                                } catch (Exception e) {
                                    e.printStackTrace();
                                }
                            }
                        }
                    }
//                    para.createRun().setText(runText, 0);
                    run.setText(runText,0);
                }

            }
        }
    }

    /**
     * 为表格插入数据,行数不够添加新行
     *
     * @param table     需要插入数据的表格
     * @param tableList 插入数据集合
     */
    private static void insertTable(XWPFTable table, List<String[]> tableList) {
        //创建行,根据需要插入的数据添加新行,不处理表头
        for (int i = 0; i < tableList.size(); i++) {
            XWPFTableRow row = table.createRow();
        }
        //遍历表格插入数据
        List<XWPFTableRow> rows = table.getRows();
        int length = table.getRows().size();
        for (int i = 1; i < length - 1; i++) {
            XWPFTableRow newRow = table.getRow(i);
            List<XWPFTableCell> cells = newRow.getTableCells();
            for (int j = 0; j < cells.size()&&tableList!=null&&tableList.size()>0; j++) {
                XWPFTableCell cell = cells.get(j);
                String s = tableList.get(i - 1)[j];
                cell.setText(s);
            }
        }
    }

    /**
     * 替换表格里面的变量
     * @param doc    要替换的文档
     * @param params 参数
     */
    private void replaceInTable(CustomXWPFDocument doc, Map<String, Object> params, List<String[]> tableList) {
        Iterator<XWPFTable> iterator = doc.getTablesIterator();
        XWPFTable table;
        List<XWPFTableRow> rows;
        List<XWPFTableCell> cells;
        List<XWPFParagraph> paras;
        while (iterator.hasNext()) {
            table = iterator.next();
            if (table.getRows().size() > 1) {
                //判断表格是需要替换还是需要插入,判断逻辑有$为替换,表格无$为插入
                if (this.matcher(table.getText()).find()) {
                    rows = table.getRows();
                    for (XWPFTableRow row : rows) {
                        cells = row.getTableCells();
                        for (XWPFTableCell cell : cells) {
                            paras = cell.getParagraphs();
                            for (XWPFParagraph para : paras) {
                                this.replaceInPara(para, params, doc);
                            }
                        }
                    }
                } else {
                    insertTable(table, tableList);  //插入数据
                }
            }
        }
    }


    /**
     * 正则匹配字符串
     *
     * @param str
     * @return
     */
    private Matcher matcher(String str) {
        Pattern pattern = Pattern.compile("\\$\\{(.+?)\\}", Pattern.CASE_INSENSITIVE);
        Matcher matcher = pattern.matcher(str);
        return matcher;
    }


    /**
     * 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) {
//                    e2.getStackTrace();
//                }
//            }
//        }
//        return byteArray;
//    }

    /**
     * 封装图片信息
     * @return
     */
    public static Map packageImgMessage(String imagePath){
        Map map = new HashMap();
        InputStream ips = null;
        try {
             ips = new FileInputStream(imagePath);
             BufferedImage image = ImageIO.read(ips);
             map.put("width", image.getWidth());
             map.put("height", image.getHeight());
             ips.close();
             ips = new FileInputStream(imagePath);
             map.put("type", imagePath.substring(imagePath.lastIndexOf(‘.‘)+1));
             int total = ips.available();
             byte[] byteArray = new byte[total];
             ips.read(byteArray);
             map.put("content", byteArray);
        } catch (Exception e) {
            e.printStackTrace();
        }finally {
            if (ips != null){
                try {
                    ips.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return map;
    }


    /**
     * 关闭输入流
     *
     * @param is
     */
    private void close(InputStream is) {
        if (is != null) {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    /**
     * 关闭输出流
     *
     * @param os
     */
    private void close(OutputStream os) {
        if (os != null) {
            try {
                os.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

  这样就实现了前台html转换为docx的word文档,并且将前台呈现的图片插入到生成的文档中。

  我想解决文档中的图片的初衷是因为导出的文档需要有饼图,如下所示:

技术图片

 

   这个饼图是word文档做出来的,并不是图片,我使用了简单的方法使用图片展现的方式呈现出来。下篇文章将介绍生成饼图的实现方式。

 

 

params包含前台传回的html内容

java web实现在线编辑word,并将word导出(二)

标签:base64编码   cat   tables   +=   for   pre   bean   boolean   web   

原文地址:https://www.cnblogs.com/guaniu2750/p/12291769.html

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