• Java 实现pdf转excel


     最近项目需要解析pdf单据,获取里面的字段数据,通过网上的查阅发现itext比pdfbox的文档要多一点,所以选择了itext(不是说pdfbox不好,只是api和例子太少,难以解)。因pdf非模板化(某政府发放),所以靠表单域获取变得不现实。一开始通过PdfReaderContentParser获取的文档内容,但是获取到的是所有内容拼接成的一个字符串,而需求需要将数据精确到字段,靠截取字符串来达到解析的目的是行不通的,因为获取的内容毫无规律。后查看源码代码,发现解析过程是逐字随机字符解析的,所以只有通过字段所在坐标范围来获取字段内容。

    /**
    * Created by luon 2018/3/21.
    */
    
    @Override
    protected ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command, BindException errors) throws Exception {
    FileUploadForm form = (FileUploadForm) command;
    
    SimpleResult result = SimpleResult.create(false);
    if (form.getFile() == null || form.getFile().getSize() == 0) {
    result.setMessage("请上传pdf文件");
    return new ModelAndView(new JsonView(result));
    }
    if (!"pdf".equals(FilenameUtils.getExtension(form.getFile().getOriginalFilename().toLowerCase()))) {
    result.setMessage("请上传pdf格式的文件");
    return new ModelAndView(new JsonView(result));
    }
    
    //获取pdf文件流
    InputStream inputStream = form.getFile().getInputStream();
    //获取pdf内容
    List<List<Map<String, String>>> listAll = exportPdfList(inputStream);
    
    final String path = "/excel模板路径/xls/fillbls.xls";
    Workbook workbook = ExcelLoader.loadXls(this.getClass().getResourceAsStream(path));
    
    //遍历pdf 内容插入Excel;
    
    List<ExcelRow> sheet = new ArrayList<>();
    for (int i = 0; i < listAll.size(); i++) {
    List<Map<String, String>> listdata = listAll.get(i);
    for (Map<String, String> map : listdata) {
    String orderNum = map.get("orderNum");
    String trackNum = map.get("trackNum");
    String serviceType = map.get("serviceType");
    String actualWeight = map.get("actualWeight");
    String actualWeightUnits = map.get("actualWeightUnits");
    String ratedWeight = map.get("ratedWeight");
    String ratedWeightUnits = map.get("ratedWeightUnits");
    String amount = map.get("amount");
    
    String chargeDesion1 = map.get("chargeDesion1");
    String chargeDesionCash1 = map.get("chargeDesionCash1");
    
    
    ExcelRow itemRow = new ExcelRow();
    itemRow.add(orderNum);
    itemRow.add(trackNum);
    itemRow.add(serviceType);
    itemRow.add(actualWeight);
    itemRow.add(actualWeightUnits);
    itemRow.add(ratedWeight);
    itemRow.add(ratedWeightUnits);
    itemRow.add(amount);
    itemRow.add(chargeDesion1);
    itemRow.add(chargeDesionCash1);
    sheet.add(itemRow);
    
    }
    }
    
    ExcelWriter.write(workbook, sheet, 0, 1);
    InputStream outStream = ExcelWriter.close(workbook);
    String fileName = "美国境内账单表.xls";
    fileName = java.net.URLEncoder.encode(fileName, "UTF-8");
    return new ModelAndView(new DownloadView(outStream, fileName));
    }
    
     
    
    //读取pdf内容  注意此方法没有贴上详细代码。
    
    public List<List<Map<String, String>>> exportPdfList(InputStream inputStream) {
    
    List<List<Map<String, String>>> listAll = new ArrayList<>();
    try {
    Map<String, byte[]> pdfData = LabelSpliter.byPageNum(inputStream);
    //分页取pdf
    List<Map.Entry<String, byte[]>> list = new ArrayList<>(pdfData.entrySet());
    //排序从 第一页开始
    Collections.sort(list, new Comparator<Map.Entry<String, byte[]>>() {
    public int compare(Map.Entry<String, byte[]> o1, Map.Entry<String, byte[]> o2) {
    return (new Integer(o1.getKey())).compareTo(new Integer(o2.getKey()));
    }
    });
    
    for (Map.Entry<String, byte[]> entry : list) {
    System.out.println(entry.getKey() + "-------------------------------------" + entry.getValue());
    byte[] pdfBypage = entry.getValue();
    InputStream inputfjsb = new ByteArrayInputStream(pdfBypage);
    PDDocument document = PDDocument.load(inputfjsb);
    if (!document.isEncrypted()) {
    PDFTextStripperByArea stripper = new PDFTextStripperByArea();
    stripper.setSortByPosition(true);
    PDFTextStripper tStripper = new PDFTextStripper();
    String pdfFileInText = tStripper.getText(document);
    
    listMap.add(map);
    
    listAll.add(listMap);
    
    return listAll;
    }
    
    }
    

      

    通过PdfReaderContentParser获取的文档内容,但是获取到的是所有内容拼接成的一个字符串,而需求需要将数据精确到字段,靠截取字符串来达到解析的目的是行不通的,因为获取的内容毫无规律。以上代码仅提供思路,谢谢!

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  • 原文地址:https://www.cnblogs.com/dreammyone/p/8633263.html
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