iText-带formPDF复制,乱码解决方式

方法1：使用iText中文支持包(见附件iTextAsian-for-5.x-1.0)然后重新设置表单字体即可

 

if (fields.getFields() != null || !fields.getFields().isEmpty()) {// change field
        ByteArrayOutputStream exchangeByteOut = new ByteArrayOutputStream();
        PdfStamper stamper = new PdfStamper(originReader, exchangeByteOut);
        fields = stamper.getAcroFields();

        Set<String> keys = fields.getFields().keySet();

        // BaseFont bfChinese =
        // BaseFont.createFont("C:/Windows/Fonts/kaiu.ttf", BaseFont.IDENTITY_H,
        // BaseFont.NOT_EMBEDDED); // the file become very large

        BaseFont bfChinese =
            BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED); // iTextAsian-for-5.x.jar
        for (String name : keys) {
          if (name == null || name.length() <= 0)
            continue;
          AcroFields.Item item = fields.getFieldItem(name);
      
            // log.info(name +"'s font is"+PDFUtils.FONT_ArialUnicodeMS);
            String value = fields.getField(name);
         // set the font   to  default
            fields.setFieldProperty(name, "textfont", bfChinese/* BaseFont.createFont() */, null);
         
            fields.setField(name, value);// reset value
 

        }
        exchangeByteOut.flush();
        exchangeByteOut.close();
        stamper.close();
        originReader = new PdfReader(exchangeByteOut.toByteArray());

....

使用 PdfCopyFields直接拷贝,合并文档
    byteOutStream = new ByteArrayOutputStream();
      PdfCopyFields copyFields = new PdfCopyFields(byteOutStream);
      copyFields.addDocument(originReader);
      copyFields.addDocument(signTempleteReader);
      copyFields.close();

 

 

方法2：把表单去掉

如果进行直接用PdfCopy带form的PDF，TextField字段会出现乱.所以要先把其处理为文本

 

   public static PdfReader processTextField(InputStream docIns) throws IOException,
      DocumentException {

    PdfReader reader = new PdfReader(docIns);
    AcroFields form = reader.getAcroFields();//read only
    Map<String, Item> fields = form.getFields();
    if (fields == null || fields.isEmpty())
      return reader;
    System.out.println(">>>>>>>>>Existing form.");
    ByteArrayOutputStream exchangeByteOut = new ByteArrayOutputStream();
    PdfStamper stamper = new PdfStamper(reader, exchangeByteOut);
    form=stamper.getAcroFields();//can edit form
    // find the filed name
    Set<Entry<String, Item>> fieldSet = fields.entrySet();
    List<String> keys = new ArrayList<String>();
    for (Entry<String, Item> entry : fieldSet) {
      String key = entry.getKey();
      keys.add(key);
    }

    // replace the field or set read only
    AcroFields.Item item;
    PdfDictionary dict;
    int fieldAlign = Element.ALIGN_LEFT;
    int flags;
    for (String k : keys) {//
      item = form.getFieldItem(k);
      fieldAlign = PDFUtils.getItemAlignment(item);
      dict = item.getMerged(0);
      int fieldType = form.getFieldType(k);
      PdfNumber pdfNum = dict.getAsNumber(PdfName.FF);
      flags = pdfNum == null ? 0 : pdfNum.intValue();
      if ((flags & BaseField.PASSWORD) > 0)
       // System.out.println(" -> password");
      if ((flags & BaseField.MULTILINE) > 0) {
       // System.out.println(" -> multiline");
      }

      String fieldValue = form.getField(k);
      float textSize = PDFUtils.getDefaultTextSize(item);
      //System.out.println(k + "-->" + fieldValue + ",textSize:" + textSize);
      List<FieldPosition> pos = form.getFieldPositions(k);
      if (pos == null || pos.isEmpty())
        continue;
      FieldPosition p = pos.get(0);
      Rectangle rect = p.position;
      if (fieldType == AcroFields.FIELD_TYPE_TEXT) {// a text field

        PdfContentByte content;

        content = stamper.getOverContent(p.page);
        ColumnText ct = new ColumnText(content);

        ct.setSimpleColumn(new Phrase(new Chunk(fieldValue, FontFactory.getFont(
            FontFactory.HELVETICA, textSize))), rect.getLeft(), rect.getBottom(), rect.getRight(),
            rect.getTop(), 9, fieldAlign);
        ct.go();
        form.removeField(k);// remave the field
      }   else {
       // log.info("it is't a text field,to set read only mode.Type:" + PDFUtils.getFormType(fieldType));
        form.setFieldProperty(k, "setfflags", PdfFormField.FF_READ_ONLY, null);
      }

    }
    stamper.close();
    ByteArrayInputStream byteIn = new ByteArrayInputStream(exchangeByteOut.toByteArray());
    reader = new PdfReader(byteIn);
    return reader;
  }
/**

public class PDFUtils {
  
  public static final String FONT_ArialUnicodeMS="ArialUnicodeMS";

  /**
   * get AcroFields.Item align
   * 
   * @param item
   * @return
   */
  public static int getItemAlignment(AcroFields.Item item) {
    int res = Element.ALIGN_LEFT;
    try {
      PdfNumber nfl = item.getMerged(0).getAsNumber(PdfName.Q);
      switch (nfl.intValue()) {
        case PdfFormField.Q_CENTER:
          res = Element.ALIGN_CENTER;
          break;
        case PdfFormField.Q_RIGHT:
          res = Element.ALIGN_RIGHT;
          break;
        case PdfFormField.Q_LEFT:
        default:
          res = Element.ALIGN_LEFT;
      }
    } catch (NullPointerException e) {
      res = Element.ALIGN_LEFT;
    } finally {
      return res;
    }
  }

  public static String getFormType(int type) {
    String name = "unknow type";
    switch (type) {
      case AcroFields.FIELD_TYPE_CHECKBOX:
        name = "Checkbox";
        break;
      case AcroFields.FIELD_TYPE_COMBO:
        name = "Combobox";
        break;
      case AcroFields.FIELD_TYPE_LIST:
        name = "List";
        break;
      case AcroFields.FIELD_TYPE_NONE:
        name = "None";
        break;
      case AcroFields.FIELD_TYPE_PUSHBUTTON:
        name = "Pushbutton";
        break;
      case AcroFields.FIELD_TYPE_RADIOBUTTON:
        name = "Radiobutton";
        break;
      case AcroFields.FIELD_TYPE_SIGNATURE:
        name = "Signature";
        break;
      case AcroFields.FIELD_TYPE_TEXT:
        name = "Text";
        break;
      default:
        name = "unknow type";
    }
    return name;
  }

  public static float getTextSize(AcroFields.Item item) {
    final int DA_SIZE = AcroFields.DA_SIZE;
    PdfString da = item.getMerged(0).getAsString(PdfName.DA);
    Object dab[] = AcroFields.splitDAelements(da.toUnicodeString());
    for (Object object : dab) {
      System.out.println("dab:" + object);

    }
    System.out.println("font:" + dab[AcroFields.DA_FONT]);
    float size = ((Float) dab[DA_SIZE]).floatValue();
    if (size <= 0) {// set default font size.
      size = 9;
    }
    return size;
  }

  public static String getTextFont(AcroFields.Item item) {
    PdfString da = item.getMerged(0).getAsString(PdfName.DA);
    Object dab[] = AcroFields.splitDAelements(da.toUnicodeString());
    return (String) dab[AcroFields.DA_FONT];
  }
//  public static String getTextColor(AcroFields.Item item) {
//    PdfString da = item.getMerged(0).getAsString(PdfName.DA);
//    Object dab[] = AcroFields.splitDAelements(da.toUnicodeString());
//    return (C) dab[AcroFields.DA_COLOR];
//  }
}