itextpdf5.5.13给pdf添加图片水印、添加文字水印（平铺）、添加文字水印（单个）、添加页眉、页脚、页眉事件、添加图片
转载自简书用户：alex很累，感谢分享。原地址：https://www.jianshu.com/p/2b9c7a0300e4
一、相关工具类
1. Excel2Pdf.java (如代码不可用请查看原地址：https://www.jianshu.com/p/be82e26622a1)
import cn.hutool.core.util.StrUtil; import com.itextpdf.text.Font; import com.itextpdf.text.*; import com.itextpdf.text.pdf.BaseFont; import com.itextpdf.text.pdf.PdfPCell; import com.itextpdf.text.pdf.PdfPTable; import org.apache.poi.hssf.usermodel.*; import org.apache.poi.hssf.util.HSSFColor; import org.apache.poi.ooxml.POIXMLDocumentPart; import org.apache.poi.ss.usermodel.*; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.xssf.usermodel.*; import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTMarker; import xyz.xunfan.xbs.constant.FontGenerater; import java.text.DecimalFormat; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.UUID; public class Excel2Pdf { public static PdfPTable excelToPdf(Workbook workbook, String filename, float pagewidth, int sheetindex) throws Exception { Sheet sheet = workbook.getSheetAt(sheetindex); float[] widths = getColWidth(sheet); PdfPTable table = new PdfPTable(widths); table.setWidthPercentage(90); table.setLockedWidth(true); table.setTotalWidth(pagewidth); int colCount = widths.length; for (int r = 0; r < sheet.getPhysicalNumberOfRows(); r++) { Row row = sheet.getRow(r); if (row != null) { for (int c = 0; c < colCount; c++) { Cell excelCell = row.getCell(c); if (excelCell == null) { excelCell = row.createCell(c); } String value = ""; if (excelCell != null) { excelCell.setCellType(CellType.STRING); value = excelCell.getStringCellValue() == null ? "" : excelCell.getStringCellValue(); } org.apache.poi.ss.usermodel.Font excelFont = getExcelFont(workbook, excelCell, filename); short fontsize = excelFont.getFontHeightInPoints(); if (!StrUtil.isEmpty(value) && value.length() > FontGenerater.FONT_SMALL_VALUELENGTH && value.split(FontGenerater.HG).length >= 3 && r <= 1) { fontsize = FontGenerater.FONT_SMALL_SIZE; } Font pdFont = getFont(excelFont.getFontName(), fontsize, excelFont.getBold()); PdfPCell pCell = null; if (value.indexOf(FontGenerater.REPORT_UNDERLINE) >= 0) { pCell = new PdfPCell(new Phrase(FontGenerater.EMPTY, pdFont)); Paragraph para = new Paragraph(); String[] values = value.split(FontGenerater.REPORT_UNDERLINE_SUFFIX); for (String v : values) { if (v.indexOf(FontGenerater.REPORT_UNDERLINE) >= 0) { v = v.replace(FontGenerater.REPORT_UNDERLINE, FontGenerater.EMPTY); Chunk dateUnderline = new Chunk(v); dateUnderline.setUnderline(0.1f, -2f); para.add(dateUnderline); } else { para.add(new Chunk(v)); } } pCell.getPhrase().add(para); } else { pCell = new PdfPCell(new Phrase(value, pdFont)); } List<PicturesInfo> infos = POIExtend.getAllPictureInfos(sheet, r, r, c, c, false); if (!infos.isEmpty()) { PicturesInfo info = infos.get(0); Image img = Image.getInstance(infos.get(0).getPictureData()); img.scaleToFit(120, 120); pCell = new PdfPCell(img); pCell.setUseAscender(true); pCell.setHorizontalAlignment(Element.ALIGN_CENTER); pCell.setVerticalAlignment(Element.ALIGN_MIDDLE); } pCell.setBorder(0); pCell.setHorizontalAlignment(getHorAglin(excelCell.getCellStyle().getAlignment().getCode())); pCell.setVerticalAlignment(getVerAglin(excelCell.getCellStyle().getVerticalAlignment().getCode())); pCell.setMinimumHeight(row.getHeightInPoints()); if (isMergedRegion(sheet, r, c)) { int[] line = getMerged(sheet, r, c); if (r == line[0]) { pCell.setBorderWidthLeft(excelCell.getCellStyle().getBorderLeft().getCode()); pCell.setBorderWidthTop(excelCell.getCellStyle().getBorderTop().getCode()); } if (line[1] == sheet.getPhysicalNumberOfRows() - 1) { pCell.setBorderWidthBottom(sheet.getRow(line[1]).getCell(line[2]).getCellStyle().getBorderBottom().getCode()); } int[] span = getMergedSpan(sheet, r, c); if (span[0] == 1 && span[1] == 1) {//忽略合并过的单元格 continue; } pCell.setRowspan(span[0]); pCell.setColspan(span[1]); c = c + span[1] - 1;//合并过的列直接跳过 } else { pCell.setBorderWidthTop(excelCell.getCellStyle().getBorderTop().getCode()); pCell.setBorderWidthLeft(excelCell.getCellStyle().getBorderLeft().getCode()); } if (r == sheet.getPhysicalNumberOfRows() - 1) { pCell.setBorderWidthBottom(excelCell.getCellStyle().getBorderBottom().getCode()); } if (c == row.getPhysicalNumberOfCells() - 1) { pCell.setBorderWidthRight(excelCell.getCellStyle().getBorderRight().getCode()); } table.addCell(pCell); } } else { PdfPCell pCell = new PdfPCell(new Phrase(FontGenerater.EMPTY)); pCell.setBorder(0); pCell.setMinimumHeight(13); table.addCell(pCell); } } return table; } //获取字体 private static org.apache.poi.ss.usermodel.Font getExcelFont(Workbook workbook, Cell cell, String excelName) { if (excelName.endsWith(".xls")) { return ((HSSFCell) cell).getCellStyle().getFont(workbook); } return ((XSSFCell) cell).getCellStyle().getFont(); } /** * 判断excel单元格是否有边框 * * @param excelCell * @return */ private static boolean hasBorder(Cell excelCell) { short top = excelCell.getCellStyle().getBorderTop().getCode(); short bottom = excelCell.getCellStyle().getBorderBottom().getCode(); short left = excelCell.getCellStyle().getBorderLeft().getCode(); short right = excelCell.getCellStyle().getBorderRight().getCode(); return top + bottom + left + right > 2; } private static void setBorder(Cell excelCell, PdfPCell pCell) { pCell.setBorderWidthTop(excelCell.getCellStyle().getBorderTop().getCode()); pCell.setBorderWidthBottom(excelCell.getCellStyle().getBorderBottom().getCode()); pCell.setBorderWidthLeft(excelCell.getCellStyle().getBorderLeft().getCode()); pCell.setBorderWidthRight(excelCell.getCellStyle().getBorderRight().getCode()); } /** * 获取excel单元格数据显示格式 * * @param dataFormat * @return * @throws Exception */ private static String getNumStyle(String dataFormat) throws Exception { if (dataFormat == null || dataFormat.length() == 0) { throw new Exception(""); } if (dataFormat.indexOf("%") > -1) { return dataFormat; } else { return dataFormat.substring(0, dataFormat.length() - 2); } } /** * 判断单元格是否是合并单元格 * * @param sheet * @param row * @param column * @return */ private static boolean isMergedRegion(Sheet sheet, int row, int column) { int sheetMergeCount = sheet.getNumMergedRegions(); for (int i = 0; i < sheetMergeCount; i++) { CellRangeAddress range = sheet.getMergedRegion(i); int firstColumn = range.getFirstColumn(); int lastColumn = range.getLastColumn(); int firstRow = range.getFirstRow(); int lastRow = range.getLastRow(); if (row >= firstRow && row <= lastRow) { if (column >= firstColumn && column <= lastColumn) { return true; } } } return false; } private static int[] getMerged(Sheet sheet, int row, int column) { int sheetMergeCount = sheet.getNumMergedRegions(); int[] span = {0, 0, 0, 0}; for (int i = 0; i < sheetMergeCount; i++) { CellRangeAddress range = sheet.getMergedRegion(i); int firstColumn = range.getFirstColumn(); int lastColumn = range.getLastColumn(); int firstRow = range.getFirstRow(); int lastRow = range.getLastRow(); if (row >= firstRow && row <= lastRow) { if (column >= firstColumn && column <= lastColumn) { span[0] = firstRow; span[1] = lastRow; span[2] = firstColumn; span[3] = lastColumn; break; } } } return span; } /** * 计算合并单元格合并的跨行跨列数 * * @param sheet * @param row * @param column * @return */ private static int[] getMergedSpan(Sheet sheet, int row, int column) { int sheetMergeCount = sheet.getNumMergedRegions(); int[] span = {1, 1}; for (int i = 0; i < sheetMergeCount; i++) { CellRangeAddress range = sheet.getMergedRegion(i); int firstColumn = range.getFirstColumn(); int lastColumn = range.getLastColumn(); int firstRow = range.getFirstRow(); int lastRow = range.getLastRow(); if (firstColumn == column && firstRow == row) { span[0] = lastRow - firstRow + 1; span[1] = lastColumn - firstColumn + 1; break; } } return span; } /** * 获取excel中每列宽度的占比 * * @param sheet * @return */ private static float[] getColWidth(Sheet sheet) { int rowNum = getMaxColRowNum(sheet); Row row = sheet.getRow(rowNum); int cellCount = row.getPhysicalNumberOfCells(); int[] colWidths = new int[cellCount]; int sum = 0; for (int i = 0; i < cellCount; i++) { Cell cell = row.getCell(i); if (cell != null) { colWidths[i] = sheet.getColumnWidth(i); sum += sheet.getColumnWidth(i); } } float[] colWidthPer = new float[cellCount]; for (int i = 0; i < cellCount; i++) { colWidthPer[i] = (float) colWidths[i] / sum * 100; } return colWidthPer; } /** * 获取excel中列数最多的行号 * * @param sheet * @return */ private static int getMaxColRowNum(Sheet sheet) { int rowNum = 0; int maxCol = 0; for (int r = 0; r < sheet.getPhysicalNumberOfRows(); r++) { Row row = sheet.getRow(r); if (row != null && maxCol < row.getPhysicalNumberOfCells()) { maxCol = row.getPhysicalNumberOfCells(); rowNum = r; } } return rowNum; } /** * excel垂直对齐方式映射到pdf对齐方式 * * @param aglin * @return */ private static int getVerAglin(int aglin) { switch (aglin) { case 1: return Element.ALIGN_MIDDLE; case 2: return Element.ALIGN_BOTTOM; case 0: return Element.ALIGN_TOP; default: return Element.ALIGN_MIDDLE; } } /** * excel水平对齐方式映射到pdf水平对齐方式 * * @param aglin * @return */ private static int getHorAglin(int aglin) { switch (aglin) { case 2: return Element.ALIGN_CENTER; case 3: return Element.ALIGN_RIGHT; case 1: return Element.ALIGN_LEFT; default: return Element.ALIGN_CENTER; } } /** * 格式化数字 * * @param pattern * @param num * @return */ private static String numFormat(String pattern, double num) { DecimalFormat format = new DecimalFormat(pattern); return format.format(num); } private static int[] getImgPostion(String imgKey) { String[] arr = imgKey.split("_"); int[] position = new int[arr.length]; for (int i = 0; i < arr.length; i++) { position[i] = Integer.parseInt(arr[i]); } return position; } public static Map<String, HSSFPictureData> getPictrues(HSSFWorkbook wb) { Map<String, HSSFPictureData> map = new HashMap<String, HSSFPictureData>(); // getAllPictures方法只能获取不同的图片，如果Excel中存在相同的图片，只能得到一张图片 List<HSSFPictureData> pics = wb.getAllPictures(); if (pics.size() == 0) { return map; } for (Integer sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) { HSSFSheet sheet = wb.getSheetAt(sheetIndex); HSSFPatriarch patriarch = sheet.getDrawingPatriarch(); if (patriarch == null) { continue; } for (HSSFShape shape : patriarch.getChildren()) { HSSFClientAnchor anchor = (HSSFClientAnchor) shape.getAnchor(); if (shape instanceof HSSFPicture) { HSSFPicture pic = (HSSFPicture) shape; int picIndex = pic.getPictureIndex() - 1; HSSFPictureData picData = pics.get(picIndex); // 键格式：sheet索引_行号_列号_单元格内的上边距_单元格内的左边距_uuid String key = sheetIndex + "_" + anchor.getRow1() + "_" + anchor.getCol1() + "_" + anchor.getRow2() + "_" + anchor.getCol2(); key += "_" + anchor.getDx1() + "_" + anchor.getDy1() + "_" + anchor.getDx2() + "_" + anchor.getDy2(); key += "_" + UUID.randomUUID(); map.put(key, picData); } } } return map; } public static Map<String, PictureData> getPictrues(Workbook wb, int type) { Map<String, PictureData> map = new HashMap<String, PictureData>(); // getAllPictures方法只能获取不同的图片，如果Excel中存在相同的图片，只能得到一张图片 List<? extends PictureData> pics = wb.getAllPictures(); if (pics.size() == 0) { return map; } for (Integer sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) { Sheet sheet = wb.getSheetAt(sheetIndex); Drawing<?> patriarch = sheet.getDrawingPatriarch(); if (patriarch == null) { continue; } if (type == 2) { HSSFPatriarch hssfpatriarch = (HSSFPatriarch) patriarch; for (HSSFShape shape : hssfpatriarch.getChildren()) { HSSFClientAnchor anchor = (HSSFClientAnchor) shape.getAnchor(); if (shape instanceof HSSFPicture) { HSSFPicture pic = (HSSFPicture) shape; int picIndex = pic.getPictureIndex() - 1; HSSFPictureData picData = (HSSFPictureData) pics.get(picIndex); // 键格式：sheet索引_行号_列号_单元格内的上边距_单元格内的左边距_uuid String key = sheetIndex + "_" + anchor.getRow1() + "_" + anchor.getCol1() + "_" + anchor.getRow2() + "_" + anchor.getCol2(); key += "_" + anchor.getDx1() + "_" + anchor.getDy1() + "_" + anchor.getDx2() + "_" + anchor.getDy2(); key += "_" + UUID.randomUUID(); map.put(key, picData); } } } else if (type == 1) { XSSFSheet xssfsheet = (XSSFSheet) sheet; for (POIXMLDocumentPart dr : xssfsheet.getRelations()) { if (dr instanceof XSSFDrawing) { XSSFDrawing drawing = (XSSFDrawing) dr; List<XSSFShape> shapes = drawing.getShapes(); for (XSSFShape shape : shapes) { XSSFPicture pic = (XSSFPicture) shape; XSSFPictureData data = pic.getPictureData(); XSSFClientAnchor aaa = pic.getClientAnchor(); CTMarker ccc = aaa.getFrom(); int ddd = ccc.getRow(); int eee = ccc.getCol(); // XSSFClientAnchor anchor = pic.getPreferredSize(); // CTMarker ctMarker = anchor.getFrom(); // String picIndex = String.valueOf(0) + "_" + ctMarker.getRow() + "_" + ctMarker.getCol(); String picIndex = String.valueOf(0) + "_" + ddd + "_" + eee; map.put(picIndex, pic.getPictureData()); } } } } } return map; } /** * 单元格是否是图片的起始位置 * * @return 单元格是否是图片的起始位置 */ public static BaseColor parseBackgroundColor(Color hssfColor) { if (hssfColor == null) { // 白色 return new BaseColor(255, 255, 255); } short[] rgb = new short[]{255, 255, 255}; if (rgb[0] == 0 && rgb[1] == 0 && rgb[2] == 0) { rgb = new short[]{255, 255, 255}; } return new BaseColor(rgb[0], rgb[1], rgb[2]); } public static PdfPCell parseImgPCell(Cell cell) { PdfPCell pdfpCell = new PdfPCell(); CellStyle cellStyle = cell.getCellStyle(); pdfpCell.setUseAscender(true); // 水平对齐方式 int halign_itext = cellStyle.getAlignment().getCode(); //int halign_itext = parseHorizontalAlignmen(halign); pdfpCell.setHorizontalAlignment(halign_itext); // 垂直对齐方式 int valign_itext = cellStyle.getVerticalAlignment().getCode(); // int valign_itext = parseVerticalAlignment(valign); pdfpCell.setVerticalAlignment(valign_itext); // 填充色（背景色） // HSSFColor backgroundColor = cellStyle.getFillBackgroundColorColor(); Color backgroundColor = cellStyle.getFillForegroundColorColor(); BaseColor backgroundColor_itext = parseBackgroundColor(backgroundColor); pdfpCell.setBackgroundColor(backgroundColor_itext); // 自动换行 boolean noWrap = !cellStyle.getWrapText(); pdfpCell.setNoWrap(noWrap); // 边框样式 // 下边框 float borderWidth = cellStyle.getBorderBottom().getCode() / 32.00f; //float borderWidth = borderStyle ; pdfpCell.setBorderWidthBottom(borderWidth); // 上框线 // borderStyle = cellStyle.getBorderTop(); pdfpCell.setBorderWidthTop(cellStyle.getBorderTop().getCode() / 32.00f); // 左框线 // borderStyle = cellStyle.getBorderLeft(); pdfpCell.setBorderWidthLeft(cellStyle.getBorderLeft().getCode() / 32.00f); // 右框线 //borderStyle = cellStyle.getBorderRight(); pdfpCell.setBorderWidthRight(cellStyle.getBorderRight().getCode() / 32.00f); pdfpCell.normalize(); // pdfpCell.disableBorderSide(9); return pdfpCell; } public static BaseColor parseColor(HSSFColor hssfColor) { if (hssfColor == null) { return new BaseColor(255, 255, 255); } short[] rgb = hssfColor.getTriplet(); return new BaseColor(rgb[0], rgb[1], rgb[2]); } public static Font getFont(String fontname, int heigth, boolean bold) throws Exception { BaseFont font = FontGenerater.getFont(fontname); if (font == null) { font = (BaseFont) FontGenerater.FONTMAP.get(FontGenerater.FONT_SONTI_NAME); } return new Font(font, heigth, bold ? Font.BOLD : Font.NORMAL, BaseColor.BLACK); } }
2. PDFUtil.java
public class PDFUtil { /** * 给pdf添加图片水印 * @param waterMar * @param imgpath 图片路径 * @throws Exception */ public static void addImgWaterMark(PdfContentByte waterMar, String imgpath) throws Exception { waterMar.beginText(); PdfGState gs = new PdfGState(); // 设置填充字体不透明度为0.4f gs.setFillOpacity(0.2f); waterMar.setFontAndSize(FontGenerater.getFont(FontGenerater.FONT_SONTI_NAME), 40); // 设置透明度 waterMar.setGState(gs); // 设置水印对齐方式 水印内容 X坐标 Y坐标 旋转角度 Image img = Image.getInstance(imgpath); img.setAbsolutePosition(200, 380); img.scaleAbsolute(200, 200); waterMar.addImage(img); // 设置水印颜色 waterMar.setColorFill(BaseColor.GRAY); //结束设置 waterMar.endText(); waterMar.stroke(); } /** * 给pdf添加文字水印（平铺） * @param waterMar * @param text 水印文本 * @throws Exception */ public static void addTextFullWaterMark(PdfContentByte waterMar, String text) throws Exception { waterMar.beginText(); PdfGState gs = new PdfGState(); // 设置填充字体不透明度为0.4f gs.setFillOpacity(0.2f); waterMar.setFontAndSize(FontGenerater.getFont(FontGenerater.FONT_SONTI_NAME), 40); // 设置透明度 waterMar.setGState(gs); // 设置水印对齐方式 水印内容 X坐标 Y坐标 旋转角度 for (int x = 0; x <= 700; x += 200) { for (int y = 0; y <= 800; y += 200) { waterMar.showTextAligned(Element.ALIGN_RIGHT, text, x, y, 35); } } // 设置水印颜色 waterMar.setColorFill(BaseColor.GRAY); //结束设置 waterMar.endText(); waterMar.stroke(); } /** * 给pdf添加文字水印（单个） * @param waterMar * @param text 水印文本 * @throws Exception */ public static void addTextWaterMark(PdfContentByte waterMar, String text) throws Exception { waterMar.beginText(); PdfGState gs = new PdfGState(); // 设置填充字体不透明度为0.4f gs.setFillOpacity(0.2f); waterMar.setFontAndSize(FontGenerater.getFont(FontGenerater.FONT_SONTI_NAME), 80); // 设置透明度 waterMar.setGState(gs); // 设置水印对齐方式 水印内容 X坐标 Y坐标 旋转角度 waterMar.showTextAligned(Element.ALIGN_RIGHT, text, 475, 600, 45); // 设置水印颜色 waterMar.setColorFill(BaseColor.GRAY); //结束设置 waterMar.endText(); waterMar.stroke(); } /** * 添加页眉、页脚 * @param writer * @param content * @param pagewidth * @param pageheight * @throws Exception */ public static void addText(PdfWriter writer, String content, int pagewidth, int pageheight) throws Exception { PdfPTable table = new PdfPTable(1); table.setTotalWidth(530); PdfPCell cell = new PdfPCell(new Phrase(content, Excel2Pdf.getFont(FontGenerater.FONT_SONTI_NAME, 12, false))); cell.setBorder(0); // cell.setPaddingLeft(30f); cell.setPaddingTop(-15f); cell.setPaddingRight(20f); table.addCell(cell); Header event = new Header(table, pagewidth, pageheight); writer.setPageEvent(null); writer.setPageEvent(event); } //页眉事件 private static class Header extends PdfPageEventHelper { public static PdfPTable header; public int pagewidth; public int pageheight; public Header(PdfPTable header, int pagewidth, int pageheight) { Header.header = header; this.pagewidth = pagewidth; this.pageheight = pageheight; } @Override public void onEndPage(PdfWriter writer, Document document) { //把页眉表格定位 header.writeSelectedRows(0, -1, this.pagewidth, this.pageheight, writer.getDirectContent()); } } /** * 添加图片 * @param document * @param imgPath * @param newWidth * @param newHeight * @param absoluteX * @param absoluteY * @throws IOException * @throws DocumentException */ public static void addImg(Document document, String imgPath, float newWidth, float newHeight, float absoluteX, float absoluteY) throws IOException, DocumentException { Image img1 = Image.getInstance(imgPath); img1.setAbsolutePosition(absoluteX, absoluteY); img1.scaleAbsolute(newWidth, newHeight); document.add(img1); } }
二、示例
1、添加图片水印
// A4大小 RectangleReadOnly shuban = new RectangleReadOnly(PageSize.A4); Document document = new Document(shuban); // 获取一个pdfwriter实例 FileOutputStream stream = new FileOutputStream("D:\\website\\demo.pdf"); PdfWriter writer = PdfWriter.getInstance(document, stream); // 打开document document.open(); // 新增页 document.newPage(); // **************添加水印************** PdfContentByte waterMar = writer.getDirectContentUnder(); PDFUtil.addImgWaterMark(waterMar, "D:\\website\\java.png"); // **************完成图片水印添加*********** // 关闭 document.close(); writer.close(); stream.close();
2、添加平铺的文字水印
// **************添加平铺的文字水印************** PdfContentByte waterMar = writer.getDirectContentUnder(); String text = "这是一个示例"; PDFUtil.addTextFullWaterMark(waterMar, text); // **************完成水印***********************
3、添加单个文字水印
// **************添加单个的文字水印************** PdfContentByte waterMar = writer.getDirectContentUnder(); String text = "这是一个示例"; PDFUtil.addTextWaterMark(waterMar, text); // **************完成水印***********************
4、插入文字、图片
// 插入文字，最后两个参数是文字的位置 PDFUtil.addText(writer, "这是一段文字", 480, 802); // 插入图片，第二、三个参数表示图片宽高，第四、五个参数表示位置 PDFUtil.addImg(document, "D:\\website\\start.png", 100, 100, 70, 700);
