Merge pull request #12965 from hmdrzsharifi/BAEL-5880

Bael-5880: Get Information about PDF in Java

pdf-2/pom.xml

@@ -25,6 +25,16 @@
             <artifactId>cleanup</artifactId>
             <version>${itextpdf.cleanup.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.itextpdf</groupId>
+            <artifactId>itextpdf</artifactId>
+            <version>5.5.13.3</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.pdfbox</groupId>
+            <artifactId>pdfbox</artifactId>
+            <version>3.0.0-RC1</version>
+        </dependency>
     </dependencies>
 
     <build>

pdf-2/src/main/java/com/baeldung/pdfinfo/PdfInfoIText.java

@@ -0,0 +1,31 @@
+package com.baeldung.pdfinfo;
+
+
+import com.itextpdf.text.pdf.PdfReader;
+
+import java.io.IOException;
+import java.util.Map;
+
+public class PdfInfoIText {
+
+    public static int getNumberOfPages(final String pdfFile) throws IOException {
+        PdfReader reader = new PdfReader(pdfFile);
+        int pages = reader.getNumberOfPages();
+        reader.close();
+        return pages;
+    }
+
+    public static boolean isPasswordRequired(final String pdfFile) throws IOException {
+        PdfReader reader = new PdfReader(pdfFile);
+        boolean isEncrypted = reader.isEncrypted();
+        reader.close();
+        return isEncrypted;
+    }
+
+    public static Map<String, String> getInfo(final String pdfFile) throws IOException {
+        PdfReader reader = new PdfReader(pdfFile);
+        Map<String, String> info = reader.getInfo();
+        reader.close();
+        return info;
+    }
+}

pdf-2/src/main/java/com/baeldung/pdfinfo/PdfInfoPdfBox.java

@@ -0,0 +1,36 @@
+package com.baeldung.pdfinfo;
+
+
+import org.apache.pdfbox.Loader;
+import org.apache.pdfbox.pdmodel.PDDocument;
+import org.apache.pdfbox.pdmodel.PDDocumentInformation;
+
+import java.io.File;
+import java.io.IOException;
+
+public class PdfInfoPdfBox {
+
+    public static int getNumberOfPages(final String pdfFile) throws IOException {
+        File file = new File(pdfFile);
+        PDDocument document = Loader.loadPDF(file);
+        int pages = document.getNumberOfPages();
+        document.close();
+        return pages;
+    }
+
+    public static boolean isPasswordRequired(final String pdfFile) throws IOException {
+        File file = new File(pdfFile);
+        PDDocument document = Loader.loadPDF(file);
+        boolean isEncrypted = document.isEncrypted();
+        document.close();
+        return isEncrypted;
+    }
+
+    public static PDDocumentInformation getInfo(final String pdfFile) throws IOException {
+        File file = new File(pdfFile);
+        PDDocument document = Loader.loadPDF(file);
+        PDDocumentInformation info = document.getDocumentInformation();
+        document.close();
+        return info;
+    }
+}

pdf-2/src/test/java/com/baeldung/pdfinfo/PdfInfoITextUnitTest.java

@@ -0,0 +1,29 @@
+package com.baeldung.pdfinfo;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.IOException;
+import java.util.Map;
+
+public class PdfInfoITextUnitTest {
+
+    private static final String PDF_FILE = "src/test/resources/input.pdf";
+
+    @Test
+    public void givenPdf_whenGetNumberOfPages_thenOK() throws IOException {
+        Assert.assertEquals(4, PdfInfoIText.getNumberOfPages(PDF_FILE));
+    }
+
+    @Test
+    public void givenPdf_whenIsPasswordRequired_thenOK() throws IOException {
+        Assert.assertFalse(PdfInfoIText.isPasswordRequired(PDF_FILE));
+    }
+
+    @Test
+    public void givenPdf_whenGetInfo_thenOK() throws IOException {
+        Map<String, String> info = PdfInfoIText.getInfo(PDF_FILE);
+        Assert.assertEquals("LibreOffice 4.2", info.get("Producer"));
+        Assert.assertEquals("Writer", info.get("Creator"));
+    }
+}

pdf-2/src/test/java/com/baeldung/pdfinfo/PdfInfoPdfBoxUnitTest.java

@@ -0,0 +1,29 @@
+package com.baeldung.pdfinfo;
+
+import org.apache.pdfbox.pdmodel.PDDocumentInformation;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.IOException;
+
+public class PdfInfoPdfBoxUnitTest {
+
+    private static final String PDF_FILE = "src/test/resources/input.pdf";
+
+    @Test
+    public void givenPdf_whenGetNumberOfPages_thenOK() throws IOException {
+        Assert.assertEquals(4, PdfInfoPdfBox.getNumberOfPages(PDF_FILE));
+    }
+
+    @Test
+    public void givenPdf_whenIsPasswordRequired_thenOK() throws IOException {
+        Assert.assertFalse(PdfInfoPdfBox.isPasswordRequired(PDF_FILE));
+    }
+
+    @Test
+    public void givenPdf_whenGetInfo_thenOK() throws IOException {
+        PDDocumentInformation info = PdfInfoPdfBox.getInfo(PDF_FILE);
+        Assert.assertEquals("LibreOffice 4.2", info.getProducer());
+        Assert.assertEquals("Writer", info.getCreator());
+    }
+}