总结之使用lowagie.text添加PDF水印

╰半橙微兮° 2022-12-01 14:25 387阅读 0赞

#### 引入依赖 ####

<dependency>
    				<groupId>com.lowagie.text</groupId>
    				<artifactId>com.springsource.com.lowagie.text</artifactId>
    				<version>${com.lowagie.text.version}</version>
    			</dependency>

#### 工具类 ####

import com.lowagie.text.DocumentException;
    import com.lowagie.text.Element;
    import com.lowagie.text.Font;
    import com.lowagie.text.Phrase;
    import com.lowagie.text.Rectangle;
    import com.lowagie.text.pdf.BaseFont;
    import com.lowagie.text.pdf.ColumnText;
    import com.lowagie.text.pdf.PdfContentByte;
    import com.lowagie.text.pdf.PdfGState;
    import com.lowagie.text.pdf.PdfReader;
    import com.lowagie.text.pdf.PdfStamper;
    import com.wisesoft.core.util.FileUtil;
    
    public class PdfWatermark {
    	/** 水印后缀 */
    	public static final String WATERMARK_SUFFIX = "_warter.pdf";
    
    	public static void main(String[] args) throws Exception {
    
    		addWatermark("D:\\tomcat7\\webapps\\pdf\\AHT_1598439883000884326.pdf", "D:\\tomcat7\\webapps\\pdf\\WAHT_1598439883000884326.pdf",
                    "成都市系统","成都市系统","成都市局",
                    "成都市系统");
    
    	}
    	
    	public static void addWatermark(String sourcepath, String savepath, String waterMarkName) throws Exception {
    		if (FileUtil.exists(sourcepath)) {
    			PdfReader pdfReader = new PdfReader(sourcepath);
    			// Get the PdfStamper object
    			PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileOutputStream(savepath));
    			PdfContentByte content = null;
    			BaseFont base = null;
    			Rectangle pageRect = null;
    			PdfGState gs = new PdfGState();
    			try {
    				// 设置字体
    				base = BaseFont.createFont("/SIMYOU.TTF", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
    			} catch (DocumentException e) {
    				e.printStackTrace();
    			} catch (IOException e) {
    				e.printStackTrace();
    			}
    			Font f = new Font(base);
    			try {
    				if (base == null || pdfStamper == null) {
    					return;
    				}
    				// 设置透明度为0.4
    				gs.setFillOpacity(0.4f);
    				gs.setStrokeOpacity(0.4f);
    				int toPage = pdfStamper.getReader().getNumberOfPages();
    				for (int i = 1; i <= toPage; i++) {
    
    					pageRect = pdfStamper.getReader().getPageSizeWithRotation(i);
    					// 计算水印X,Y坐标
    					float x = pageRect.getWidth() / 2;
    					float y = pageRect.getHeight() / 2;
    					// 获得PDF最顶层
    					content = pdfStamper.getOverContent(i);
    					content.saveState();
    					// set Transparency
    					content.setGState(gs);
    					content.beginText();
    					content.setColorFill(Color.LIGHT_GRAY);
    					content.setFontAndSize(base, 40);
    					// 水印文字成45度角倾斜
    					content.showTextAligned(Element.ALIGN_CENTER, waterMarkName, x, y, 45);
    					content.endText();
    				}
                    System.out.println("水印添加成功，保存地址："+savepath+"，水印为："+waterMarkName);
    			} catch (Exception ex) {
    				ex.printStackTrace();
    			} finally {
    				content = null;
    				base = null;
    				pageRect = null;
    				pdfStamper.close();
    			}
    		}
    	}
    
        public static void addWatermark(String sourcepath, String savepath, String waterMarkName, String pageHeade,
                                        String foot) throws Exception {
            if (FileUtil.exists(sourcepath)) {
                PdfReader pdfReader = new PdfReader(sourcepath);
                // Get the PdfStamper object
                PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileOutputStream(savepath));
                PdfContentByte content = null;
                BaseFont base = null;
                Rectangle pageRect = null;
                PdfGState gs = new PdfGState();
                try {
                    // 设置字体
                    base = BaseFont.createFont("/SIMYOU.TTF", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
                } catch (DocumentException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                Font f = new Font(base);
                try {
                    if (base == null || pdfStamper == null) {
                        return;
                    }
                    // 设置透明度为0.4
                    gs.setFillOpacity(0.4f);
                    gs.setStrokeOpacity(0.4f);
                    int toPage = pdfStamper.getReader().getNumberOfPages();
                    for (int i = 1; i <= toPage; i++) {
    
                        pageRect = pdfStamper.getReader().getPageSizeWithRotation(i);
                        // 计算水印X,Y坐标
                        float x = pageRect.getWidth() / 2;
                        float y = pageRect.getHeight() / 2;
                        // 获得PDF最顶层
                        content = pdfStamper.getOverContent(i);
                        content.saveState();
                        // set Transparency
                        content.setGState(gs);
                        content.beginText();
                        content.setColorFill(Color.LIGHT_GRAY);
                        content.setFontAndSize(base, 60);
                        // 水印文字成45度角倾斜
                        content.showTextAligned(Element.ALIGN_CENTER, waterMarkName, x, y, 45);
                        content.endText();
    
                        // 添加页脚，左侧文字，右侧页码
                        ColumnText.showTextAligned(content, Element.ALIGN_RIGHT,
                                new Phrase(String.format("第 %d 页/共 %d 页", i, toPage), f), 550f, 28, 0);
                        ColumnText.showTextAligned(content, Element.ALIGN_LEFT, new Phrase(foot, f), 50f, 28, 0);
    
                        // 添加页眉 (文字页眉，居中)
                        ColumnText.showTextAligned(content, Element.ALIGN_CENTER, new Phrase(pageHeade, f), 150f, 800, 0);
                    }
                    System.out.println("水印添加成功，保存地址："+savepath+"，水印为："+waterMarkName);
                } catch (Exception ex) {
                    ex.printStackTrace();
                } finally {
                    content = null;
                    base = null;
                    pageRect = null;
                    pdfStamper.close();
                }
            }
        }
    
    
    
        public static void addWatermark(String sourcepath, String savepath, String waterMarkName, String pageHeadLeft,
                                        String pageHeadRight,String foot) throws Exception {
    		if (FileUtil.exists(sourcepath)) {
    			PdfReader pdfReader = new PdfReader(sourcepath);
    			// Get the PdfStamper object
    			PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileOutputStream(savepath));
    			PdfContentByte content = null;
    			BaseFont base = null;
    			Rectangle pageRect = null;
    			PdfGState gs = new PdfGState();
    			try {
    				// 设置字体
    				base = BaseFont.createFont("/SIMYOU.TTF", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
    			} catch (DocumentException e) {
    				e.printStackTrace();
    			} catch (IOException e) {
    				e.printStackTrace();
    			}
    			Font f = new Font(base);
    			try {
    				if (base == null || pdfStamper == null) {
    					return;
    				}
    
    				int toPage = pdfStamper.getReader().getNumberOfPages();
    				for (int i = 1; i <= toPage; i++) {
                        // 设置透明度为0.4
                        gs.setFillOpacity(0.4f);
                        gs.setStrokeOpacity(0.4f);
    					pageRect = pdfStamper.getReader().getPageSizeWithRotation(i);
    					// 计算水印X,Y坐标
    					float x = pageRect.getWidth() / 2;
    					float y = pageRect.getHeight() / 2;
    					// 获得PDF最顶层
    					content = pdfStamper.getOverContent(i);
    					content.saveState();
    					// set Transparency
    					content.setGState(gs);
    					content.beginText();
    					content.setColorFill(Color.LIGHT_GRAY);
    					content.setFontAndSize(base, 40);
    					// 水印文字成45度角倾斜
    					content.showTextAligned(Element.ALIGN_CENTER, waterMarkName, x, y, 45);
    					content.endText();
                        // 设置透明度为0.4
                        gs.setFillOpacity(0.9f);
                        gs.setStrokeOpacity(0.9f);
    					// 添加页脚，左侧文字，右侧页码
    					ColumnText.showTextAligned(content, Element.ALIGN_RIGHT,
    							new Phrase(String.format("第 %d 页/共 %d 页", i, toPage), f), 550f, 20, 0);
    					ColumnText.showTextAligned(content, Element.ALIGN_LEFT, new Phrase(foot, f), 50f, 20, 0);
    
    					// 添加左页眉
    					ColumnText.showTextAligned(content, Element.ALIGN_CENTER, new Phrase(pageHeadLeft, f), 150f, 815, 0);
                        // 添加右页眉
                        ColumnText.showTextAligned(content, Element.ALIGN_CENTER, new Phrase(pageHeadRight, f), 500f, 815, 0);
    				}
                    System.out.println("水印添加成功，保存地址："+savepath+"，水印为："+waterMarkName);
    			} catch (Exception ex) {
    				ex.printStackTrace();
    			} finally {
    				content = null;
    				base = null;
    				pageRect = null;
    				pdfStamper.close();
    			}
    		}
    	}
    
    	
    }