水印位置

src/main/java/com/shcd/ghjg_pdf/service/impl/PDFServicePDFBOXImpl.java

@@ -5,8 +5,10 @@ import com.itextpdf.text.pdf.PdfReader;
 import com.itextpdf.text.pdf.PdfStamper;
 import com.itextpdf.text.pdf.PdfWriter;
 import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDPage;
 import org.apache.pdfbox.pdmodel.PDPageContentStream;
 import org.apache.pdfbox.pdmodel.font.PDType1Font;
+import org.apache.pdfbox.util.Matrix;
 import org.springframework.stereotype.Component;
 
 import javax.annotation.PostConstruct;
@@ -20,6 +22,12 @@ import java.util.Date;
 public class PDFServicePDFBOXImpl {
     @PostConstruct
     public void PDFEncode() throws IOException, DocumentException {
+        int rowSpace=150;
+        int colSpace=150;
+        Date date = new Date();
+        int year = date.getYear() + 1900;
+        int month = date.getMonth() + 1;
+        int day = date.getDay();
         PDDocument load = PDDocument.load(new File("E:\\pdf\\SMU749-050-09JS完整稳性计算报告.pdf"));
         for (int i = 0; i < load.getNumberOfPages(); i++) {
             PDPageContentStream contentStream = new PDPageContentStream(load, load.getPage(i), PDPageContentStream.AppendMode.APPEND, true, true);
@@ -29,22 +37,29 @@ public class PDFServicePDFBOXImpl {
             contentStream.setNonStrokingColor(200, 200, 200, 150);
             //添加水印
             contentStream.beginText();
-            contentStream.newLineAtOffset(100, 100);
-            Date date = new Date();
-            int year = date.getYear() + 1900;
-            int month = date.getMonth() + 1;
-            int day = date.getDay();
-            contentStream.showText(year + "-" + month + "-" + day);
+            PDPage page = load.getPage(i);
+            float pageHeight = page.getMediaBox().getHeight();
+            float pageWidth = page.getMediaBox().getWidth();
+            //pdf修改水印
+            for (int h = 10; h < pageHeight; h = h + rowSpace) {
+                for (int w = - 10; w < pageWidth; w = w + colSpace) {
+                    contentStream.setTextMatrix(Matrix.getRotateInstance(0.3, w, h));
+                    contentStream.showText(year + "-" + month + "-" + day);
+                }
+            }
+            //contentStream.newLineAtOffset(100, 100);
+
+//            contentStream.showText();
             contentStream.endText();
             contentStream.close();
         }
         load.save("E:\\pdf\\SMU749-050-09JS完整稳性计算报告水印版.pdf");
         load.close();
-        PdfReader reader = new PdfReader("E:\\pdf\\SMU749-050-09JS完整稳性计算报告水印版.pdf");
-        PdfStamper stamper = new PdfStamper(reader, Files.newOutputStream(Paths.get("E:\\pdf\\SMU749-050-09JS完整稳性计算报告水印密码版.pdf")));
-        stamper.setEncryption("123456".getBytes(), "12345".getBytes(), PdfWriter.ALLOW_PRINTING, PdfWriter.STANDARD_ENCRYPTION_40);
-        stamper.flush();
-        stamper.close();
-        reader.close();
+//        PdfReader reader = new PdfReader("E:\\pdf\\SMU749-050-09JS完整稳性计算报告水印版.pdf");
+//        PdfStamper stamper = new PdfStamper(reader, Files.newOutputStream(Paths.get("E:\\pdf\\SMU749-050-09JS完整稳性计算报告水印密码版.pdf")));
+//        stamper.setEncryption("123456".getBytes(), "12345".getBytes(), PdfWriter.ALLOW_PRINTING, PdfWriter.STANDARD_ENCRYPTION_40);
+//        stamper.flush();
+//        stamper.close();
+//        reader.close();
     }
 }