3.2.0-水印字体透明度和位置调整

distributed-print-business/src/main/java/com/qmth/distributed/print/business/util/CreatePdfUtil.java

@@ -771,7 +771,7 @@ public class CreatePdfUtil {
                     int pages = dto.getPages();
                     pagesList.add(pages);
                     PdfDto pdfDto = PdfUtil.addPdfPage(dto.getFile());
-                    File file = paperPdfDto.size() > 1 ? PdfUtil.addWaterMark(dto.getFile(), waterMarkNames, 1f, 12, 0): dto.getFile();
+                    File file = paperPdfDto.size() > 1 ? PdfUtil.addWaterMark(dto.getFile(), waterMarkNames, 0.5f, 12, 0): dto.getFile();
                     pdfList.add(new PdfDto(file.getPath(), dto.getPageSize(), pdfDto.getPageCount()));
                 }
             }

distributed-print-business/src/main/java/com/qmth/distributed/print/business/util/PdfUtil.java

@@ -292,7 +292,7 @@ public class PdfUtil {
      *
      * @param inputFile     需要添加水印的文件
      * @param waterMarkName 需要添加的水印文字
-     * @param opacity       水印字体透明度
+     * @param opacity       水印字体透明度（0-1）
      * @param fontsize      水印字体大小
      * @param rotation      水印倾斜角度（0-360）
      */
@@ -362,7 +362,7 @@ public class PdfUtil {
                 under.beginText();
                 under.setFontAndSize(base, fontsize); //这里是水印字体大小
                 for (int j = 0; j < waterMarkName.length; j++) {
-                    under.showTextAligned(Element.ALIGN_LEFT, waterMarkName[j], 10, pageRect.getHeight() - 30 - (j * textH), rotation);
+                    under.showTextAligned(Element.ALIGN_LEFT, waterMarkName[j], 20, pageRect.getHeight() - 20 - (j * textH), rotation);
                 }
                 //添加水印文字
                 under.endText();

distributed-print/src/test/java/com/qmth/distributed/print/PDFWaterMarkTest.java

@@ -0,0 +1,124 @@
+package com.qmth.distributed.print;
+
+import com.itextpdf.awt.AsianFontMapper;
+import com.itextpdf.text.DocumentException;
+import com.itextpdf.text.Element;
+import com.itextpdf.text.Rectangle;
+import com.itextpdf.text.pdf.*;
+
+import javax.swing.*;
+import java.awt.*;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public class PDFWaterMarkTest {
+    public static void main(String[] args) throws Exception {
+
+        //需要添加水印的文件
+        String inputFile = "D:\\基础和声1.pdf";
+        //添加完水印的文件存放路径
+        String outputFile = "D:\\基础和声1（水印）.pdf";
+        //需要添加的水印文字
+        String[] waterMarkName = {"添加水印", "dfsf"};
+        //水印字体透明度
+        float opacity = 0.5f;
+        //水印字体大小
+        int fontsize = 12;
+        //水印倾斜角度（0-360）
+        int rotation = 0;
+
+        addWaterMark(inputFile, outputFile, waterMarkName, opacity, fontsize, rotation);
+    }
+
+
+    /**
+     * pdf添加水印
+     *
+     * @param inputFile     需要添加水印的文件
+     * @param outputFile    添加完水印的文件存放路径
+     * @param waterMarkName 需要添加的水印文字
+     * @param opacity       水印字体透明度
+     * @param fontsize      水印字体大小
+     * @param rotation         水印倾斜角度（0-360）
+     */
+    public static boolean addWaterMark(String inputFile, String outputFile, String[] waterMarkName,
+                                       float opacity, int fontsize, int rotation) {
+        File file = new File(inputFile);
+        if (!file.exists()) {
+            return false;
+        }
+
+        PdfReader reader = null;
+        PdfStamper stamper = null;
+        try {
+            reader = new PdfReader(inputFile);
+            stamper = new PdfStamper(reader, new FileOutputStream(outputFile));
+            BaseFont base = BaseFont.createFont(AsianFontMapper.ChineseSimplifiedFont, AsianFontMapper.ChineseSimplifiedEncoding_H, BaseFont.NOT_EMBEDDED);
+            Rectangle pageRect = null;
+            PdfGState gs = new PdfGState();
+            //这里是透明度设置
+            gs.setFillOpacity(opacity);
+            //这里是条纹不透明度
+            gs.setStrokeOpacity(0.2f);
+            int total = reader.getNumberOfPages() + 1;
+            System.out.println("Pdf页数：" + reader.getNumberOfPages());
+            int textH = 0;
+            int textW = 0;
+            for (String s : waterMarkName) {
+                JLabel label = new JLabel();
+                FontMetrics metrics;
+
+                label.setText(s);
+                metrics = label.getFontMetrics(label.getFont());
+                //字符串的高,   只和字体有关
+                textH = metrics.getHeight();
+                //字符串的宽
+                textW = metrics.stringWidth(label.getText());
+            }
+
+            PdfContentByte under;
+            //循环PDF，每页添加水印
+            for (int i = 1; i < total; i++) {
+                pageRect = reader.getPageSizeWithRotation(i);
+                under = stamper.getOverContent(i);  //在内容上方添加水印
+                //under = stamper.getUnderContent(i);  //在内容下方添加水印
+                under.saveState();
+                under.setGState(gs);
+                under.beginText();
+                //under.setColorFill(BaseColor.PINK);  //添加文字颜色  不能动态改变 放弃使用
+                under.setFontAndSize(base, fontsize); //这里是水印字体大小
+                for (int j = 0; j < waterMarkName.length;j++) {
+                    under.showTextAligned(Element.ALIGN_LEFT, waterMarkName[j], 10, pageRect.getHeight() - 30 - (j * textH), rotation);
+                }
+                //添加水印文字
+                under.endText();
+            }
+
+            System.out.println("添加水印成功！");
+            return true;
+        } catch (IOException e) {
+            System.out.println("添加水印失败！错误信息为: " + e);
+            e.printStackTrace();
+            return false;
+        } catch (DocumentException e) {
+            System.out.println("添加水印失败！错误信息为: " + e);
+            e.printStackTrace();
+            return false;
+        } finally {
+            //关闭流
+            if (stamper != null) {
+                try {
+                    stamper.close();
+                } catch (DocumentException e) {
+                    e.printStackTrace();
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+            if (reader != null) {
+                reader.close();
+            }
+        }
+    }
+}