java使用itextpdf、itext-asian对pdf文件加水印

package com.han.pdf; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import com.itextpdf.text.BaseColor; import com.itextpdf.text.Document; import com.itextpdf.text.DocumentException; import com.itextpdf.text.Element; import com.itextpdf.text.Font; import com.itextpdf.text.Image; import com.itextpdf.text.PageSize; import com.itextpdf.text.Paragraph; import com.itextpdf.text.Rectangle; import com.itextpdf.text.pdf.BaseFont; import com.itextpdf.text.pdf.PdfContentByte; import com.itextpdf.text.pdf.PdfGState; import com.itextpdf.text.pdf.PdfReader; import com.itextpdf.text.pdf.PdfStamper; import com.itextpdf.text.pdf.PdfWriter; public class PDFBuild { public static void buidPDF(String pdfFile, String imageFile, String waterMarkName, int permission) { try { File file = File.createTempFile("tempFile", ".pdf"); // 创建临时文件 // 生成PDF if (createPDFFile(file)) { waterMark(file.getPath(), imageFile, pdfFile, waterMarkName, permission); // 添加水印 } } catch (Exception e) { e.printStackTrace(); } } /** * 创建PDF文件 * * @param file * 临时文件 * @return 成功/失败 */ public static boolean createPDFFile(File file) { com.itextpdf.text.Rectangle rect = new Rectangle(PageSize.A4); Document doc = new Document(rect, 50.0F, 50.0F, 50.0F, 50.0F); try { PdfWriter.getInstance(doc, new FileOutputStream(file)); doc.open(); BaseFont bf = BaseFont.createFont("C:/WINDOWS/Fonts/SIMSUN.TTC,1", "Identity-H", true);// 使用系统字体 Font font = new Font(bf, 14.0F, 0); font.setStyle(37); // 设置样式 font.setFamily("宋体"); // 设置字体 Paragraph p = new Paragraph("付 款 通 知 书\r\n", font); p.setAlignment(1); doc.add(p); doc.close(); return true; } catch (Exception e) { e.printStackTrace(); } return false; } public static void waterMark(String inputFile, String imageFile, String outputFile, String waterMarkName, int permission) { try { PdfReader reader = new PdfReader(inputFile); PdfStamper stamper = new PdfStamper(reader, new FileOutputStream( outputFile)); BaseFont base = BaseFont.createFont( "C:/WINDOWS/Fonts/SIMSUN.TTC,1", "Identity-H", true);// 使用系统字体 int total = reader.getNumberOfPages() + 1; Image image = Image.getInstance(imageFile); // 图片位置 image.setAbsolutePosition(400, 480); PdfContentByte under; int j = waterMarkName.length(); char c = 0; int rise = 0; for (int i = 1; i < total; i++) { rise = 400; under = stamper.getUnderContent(i); under.beginText(); under.setFontAndSize(base, 30); if (j >= 15) { under.setTextMatrix(200, 120); for (int k = 0; k < j; k++) { under.setTextRise(rise); c = waterMarkName.charAt(k); under.showText(c + ""); } } else { under.setTextMatrix(240, 100); for (int k = 0; k < j; k++) { under.setTextRise(rise); c = waterMarkName.charAt(k); under.showText(c + ""); rise -= 18; } } // 添加水印文字 under.endText(); // 添加水印图片 under.addImage(image); // 画个圈 under.ellipse(250, 450, 350, 550); under.setLineWidth(1f); under.stroke(); } stamper.close(); } catch (Exception e) { e.printStackTrace(); } } public static void main(String[] args) throws Exception { /* String imageFilePath = "E:/pdf/1.png"; // 水印图片路径 String pdfFilePath = "E:/pdf/test.pdf"; // 文件生成路径 buidPDF(pdfFilePath, imageFilePath, "正版授权", 16); */ /* String pdfFilePath = "E:/pdf/1.pdf"; com.itextpdf.text.Rectangle rect = new Rectangle(PageSize.A4); try { PdfReader reader = new PdfReader(new FileInputStream(new File(pdfFilePath))); PdfStamper stamper = new PdfStamper(reader, new FileOutputStream("E:/pdf/test.png")); PDFBuild.addWatermark(stamper, rect, 0, "哈哈哈"); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (DocumentException e) { e.printStackTrace(); } */ String pdfFilePath = "E:/pdf/1.pdf"; // 文件生成路径 String pdfPath = "E:/pdf/test.pdf"; // 文件生成路径 PDFBuild.addWaterMark(pdfFilePath, pdfPath, "112121131411314144114", 400, 880); } private static void addWatermark(PdfStamper stamper, Rectangle pageRectangle, int waterMarkCount, String waterMarkName) { PdfContentByte content; BaseFont base = null; try { //设置字体 base = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED); } catch (DocumentException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } //计算水印X,Y坐标 float x = pageRectangle.getWidth() / 2; float y = pageRectangle.getHeight() / 2; for (int i = 1; i < waterMarkCount + 1; i++) { content = stamper.getOverContent(i);//获得PDF最顶层 content.saveState(); // set Transparency PdfGState gs = new PdfGState(); gs.setFillOpacity(0.2f);//设置透明度为0.2 content.setGState(gs); content.beginText(); content.setColorFill(BaseColor.GRAY); content.setFontAndSize(base, 40); content.showTextAligned(Element.ALIGN_CENTER, waterMarkName, x, y, 35);//水印文字成35度角倾斜 content.endText(); content.beginText(); content.setColorFill(BaseColor.GRAY); content.setFontAndSize(base, 30); String seeAttached="(See attached digital certificate)"; content.showTextAligned(Element.ALIGN_CENTER, seeAttached, x, y-42, 35); content.endText(); content.restoreState();//注意这里必须调用一次restoreState 否则设置无效 } } /** * * 【功能描述：添加图片和文字水印】 【功能详细描述：功能详细描述】 * @param srcFile 待加水印文件 * @param destFile 加水印后存放地址 * @param text 加水印的文本内容 * @param textWidth 文字横坐标 * @param textHeight 文字纵坐标 * @throws Exception */ public static