java完整的利用itext5制作pdf、二维码图片插入pdf，并解析pdf中的二维码信息

缺乏、安全感 2022-06-08 00:58 195阅读 0赞

**利用itext5、zxing、QRCore制作pdf、二维码图片插入pdf，并解析pdf中的二维码信息，手机可以实现扫描获取二维码的信息，并进行验证你的解析是否正确。**

**先是生成二维码图片并插入pdf中**

package com.parseImage;
    
    import com.itextpdf.text.*;
    import com.itextpdf.text.pdf.*;
    import java.io.FileOutputStream;
    import java.io.IOException;
    
    public class CreateBarcodePdf {
    
        public static void main(String... args) throws IOException, DocumentException {
            Document document = new Document();
            PdfWriter writer = PdfWriter.getInstance(document, new 
    //pdf输出地址
    FileOutputStream("./src/test/resources/scanner.pdf"));
    
            document.open();
            PdfContentByte cb = writer.getDirectContent();
            
            BarcodeQRCode barcodeQRCode = new BarcodeQRCode("http://memorynotfound.com", 1000, 1000, null);
            Image codeQrImage = barcodeQRCode.getImage();
            codeQrImage.scaleAbsolute(100, 100);
            
            document.add(codeQrImage);
    
            document.close();
        }
    }

**效果图**  
![这里写图片描述][09d97c3c7b968e22a2d1778fea5ae27f.png]

**抽取pdf中二维码图片**

package com.parseImage;

import java.io.IOException;  
import com.itextpdf.text.DocumentException;  
import com.itextpdf.text.pdf.PdfReader;  
import com.itextpdf.text.pdf.parser.PdfReaderContentParser;

/\*\*

*  Extracts images from a PDF file.  
    \*/  
    public class ExtractImages \{
    
    /\*\*
    
     *  PDF to extract images from  
        \*/  
        //pdf路径  
        public static final String SOURCE\_PDF = “./src/test/resources/scanner.pdf”;
    
    /\*\*
    
     *  Parses a PDF and extracts all the images.
     *  
     *  @param filename the source PDF
     *  @param destination the directory to save images  
        \*/  
        public void extractImages(String filename, String destination)  
        throws IOException, DocumentException \{  
        System.out.println("Processing PDF at " + filename);  
        System.out.println("Saving images to " + destination);
        
        PdfReader reader = new PdfReader(filename);  
        PdfReaderContentParser parser = new PdfReaderContentParser(reader);  
        ImageRenderListener listener = new ImageRenderListener(destination + “/Img”);  
        for (int i = 1; i <= reader.getNumberOfPages(); i++) \{  
        parser.processContent(i, listener);  
        \}  
        reader.close();  
        \}
    
    /\*\*
    
     *  Main method.
     *  
     *  @param args no arguments needed
     *  @throws DocumentException
     *  @throws IOException  
        \*/  
        public static void main(String\[\] args) throws IOException, DocumentException \{  
        String sourcePDF = SOURCE\_PDF;//读取图片地址  
        String destination = “target”;//图片输出地址  
        if (args.length > 0) \{  
        sourcePDF = args\[0\];  
        if (args.length > 1) \{  
        destination = args\[1\];  
        \}  
        \}
        
        new ExtractImages().extractImages(sourcePDF, destination);  
        \}

}

**效果图**  
![这里写图片描述][892cc3eb5c943a4c03514c43c4bd64bb.png]  
![这里写图片描述][87d507ba4460a3233ad72ee4d1e20f66.png]  
**识别二维码图片中的二维码信息**

package com.parseImage.parse;
    
    import java.awt.image.BufferedImage;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.util.HashMap;
    
    import javax.imageio.ImageIO;
    
    import com.google.zxing.Binarizer;
    import com.google.zxing.BinaryBitmap;
    import com.google.zxing.DecodeHintType;
    import com.google.zxing.LuminanceSource;
    import com.google.zxing.MultiFormatReader;
    import com.google.zxing.NotFoundException;
    import com.google.zxing.Result;
    import com.google.zxing.common.HybridBinarizer;
    import com.parseImage.BufferedImageLuminanceSource;
    
    public class ParseImage {
    
    	public static void main(String[] args) throws NotFoundException, IOException {
    		String decode = decode("./target/Img-1.png");//识别图片路径
    		System.out.println(decode)//输出到控制台
    	}
    	public static String decode(String filepath) throws IOException, NotFoundException {
    		  BufferedImage bufferedImage = ImageIO.read(new FileInputStream(filepath));
    		  LuminanceSource source = new BufferedImageLuminanceSource(bufferedImage);
    		  Binarizer binarizer = new HybridBinarizer(source);
    		  BinaryBitmap bitmap = new BinaryBitmap(binarizer);
    		  HashMap<DecodeHintType, Object> decodeHints = new HashMap<DecodeHintType, Object>();
    		  decodeHints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
    		  Result result = new MultiFormatReader().decode(bitmap, decodeHints);
    		  return result.getText();
    		}
    }
    **控制台信息解析二维码信息**

![这里写图片描述][904df0c2fcd1b4a6f15008753cf52cb9.png]  
**手机扫描二维码信息**  
![这里写图片描述][4a22049c775fed07701cd44198e21aad.png]  
**由于官方版本更新过快导致有些类已经改变或者丢失，需要添加自己写的必不可少的两个辅助类。**

**图片监听**  
package com.parseImage;

import java.io.FileOutputStream;  
import java.io.IOException;

import com.itextpdf.text.pdf.PRStream;  
import com.itextpdf.text.pdf.PdfDictionary;  
import com.itextpdf.text.pdf.PdfName;  
import com.itextpdf.text.pdf.parser.ImageRenderInfo;  
import com.itextpdf.text.pdf.parser.PdfImageObject;  
import com.itextpdf.text.pdf.parser.RenderListener;  
import com.itextpdf.text.pdf.parser.TextRenderInfo;

public class ImageRenderListener implements RenderListener  
\{  
final String name;  
int counter = 100000;

public ImageRenderListener(String name)
        {
            this.name = name;
        }
    
        public void beginTextBlock() { }
        public void renderText(TextRenderInfo renderInfo) { }
        public void endTextBlock() { }
    
        public void renderImage(ImageRenderInfo renderInfo)
        {
            try
            {
                PdfImageObject image = renderInfo.getImage();
                if (image == null) return;
                int number = renderInfo.getRef() != null ? renderInfo.getRef().getNumber() : counter++;
                String filename = String.format("%s-%s.%s", name, number, image.getFileType());
                FileOutputStream os = new FileOutputStream(filename);
                os.write(image.getImageAsBytes());
                os.flush();
                os.close();
    
                PdfDictionary imageDictionary = image.getDictionary();
                PRStream maskStream = (PRStream) imageDictionary.getAsStream(PdfName.SMASK);
                if (maskStream != null)
                {
                    PdfImageObject maskImage = new PdfImageObject(maskStream);
                    filename = String.format("%s-%s-mask.%s", name, number, maskImage.getFileType());
                    os = new FileOutputStream(filename);
                    os.write(maskImage.getImageAsBytes());
                    os.flush();
                    os.close();
                }
            }
            catch (IOException e)
            {
                e.printStackTrace();
            }
        }
    
    }

**buffer图片资源**

package com.parseImage;
    
    import java.awt.Graphics2D;
    import java.awt.geom.AffineTransform;
    import java.awt.image.BufferedImage;
    
    import com.google.zxing.LuminanceSource;
    
    public class BufferedImageLuminanceSource extends LuminanceSource {
    
    	private final BufferedImage image;  
        private final int left;  
        private final int top;  
       
        public BufferedImageLuminanceSource(BufferedImage image) {
       
            this(image, 0, 0, image.getWidth(), image.getHeight());  
         
    }  
       
        public BufferedImageLuminanceSource(BufferedImage image, int left,  
                int top, int width, int height) {
       
            super(width, height);  
       
            int sourceWidth = image.getWidth();  
            int sourceHeight = image.getHeight();  
            if (left + width > sourceWidth || top + height > sourceHeight) {
       
                throw new IllegalArgumentException(  
                        "Crop rectangle does not fit within image data.");  
             
    }  
       
            for (int y = top; y < top + height; y++) {
       
                for (int x = left; x < left + width; x++) {
       
                    if ((image.getRGB(x, y) & 0xFF000000) == 0) {
       
                        image.setRGB(x, y, 0xFFFFFFFF); // = white  
                     
    }  
                 
    }  
             
    }  
       
            this.image = new BufferedImage(sourceWidth, sourceHeight,  
                    BufferedImage.TYPE_BYTE_GRAY);  
            this.image.getGraphics().drawImage(image, 0, 0, null);  
            this.left = left;  
            this.top = top;  
         
    }  
       
           
        public byte[] getRow(int y, byte[] row) {
       
            if (y < 0 || y >= getHeight()) {
       
                throw new IllegalArgumentException(  
                        "Requested row is outside the image: " + y);  
             
    }  
            int width = getWidth();  
            if (row == null || row.length < width) {
       
                row = new byte[width];  
             
    }  
            image.getRaster().getDataElements(left, top + y, width, 1, row);  
            return row;  
         
    }  
       
           
        public byte[] getMatrix() {
       
            int width = getWidth();  
            int height = getHeight();  
            int area = width * height;  
            byte[] matrix = new byte[area];  
            image.getRaster().getDataElements(left, top, width, height, matrix);  
            return matrix;  
         
    }  
       
           
        public boolean isCropSupported() {
       
            return true;  
         
    }  
       
           
        public LuminanceSource crop(int left, int top, int width, int height) {
       
            return new BufferedImageLuminanceSource(image, this.left + left,  
                    this.top + top, width, height);  
         
    }  
       
           
        public boolean isRotateSupported() {
       
            return true;  
         
    }  
       
           
        public LuminanceSource rotateCounterClockwise() {
       
            int sourceWidth = image.getWidth();  
            int sourceHeight = image.getHeight();  
            AffineTransform transform = new AffineTransform(0.0, -1.0, 1.0,  
                    0.0, 0.0, sourceWidth);  
            BufferedImage rotatedImage = new BufferedImage(sourceHeight,  
                    sourceWidth, BufferedImage.TYPE_BYTE_GRAY);  
            Graphics2D g = rotatedImage.createGraphics();  
            g.drawImage(image, transform, null);  
            g.dispose();  
            int width = getWidth();  
            return new BufferedImageLuminanceSource(rotatedImage, top,  
                    sourceWidth - (left + width), getHeight(), width);  
         
    } 
    
    }

**pom.xml**  
**请完整的参考我的jar和版本（尤其是版本，因为不同的版本，类可能有改变或者缺失）**

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
      <modelVersion>4.0.0</modelVersion>
      <groupId>com.itext.parse.image</groupId>
      <artifactId>parseImage</artifactId>
      <version>0.0.1-SNAPSHOT</version>
      <packaging>war</packaging>
      
      <dependencies>
    
        
        <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itextpdf</artifactId>
                <version>5.1.3</version>
                <type>jar</type>
    	</dependency>
    	
    	<dependency>
        <groupId>com.google.zxing</groupId>
        <artifactId>core</artifactId>
        <version>2.3.0</version>
    	</dependency>
    	
    	<dependency>
        <groupId>commons-lang</groupId>
        <artifactId>commons-lang</artifactId>
        <version>2.6</version>
    	</dependency>
    	
    	<dependency>
        <groupId>org.apache.pdfbox</groupId>
        <artifactId>pdfbox</artifactId>
        <version>2.0.7</version>
    </dependency>
    </dependencies>
    
    </project>

**附上我的源码连接**  
[http://download.csdn.net/download/qq\_36832411/9971701][http_download.csdn.net_download_qq_36832411_9971701]  
**请尊重原创，如果转载请注明转载自何处，我是一个自学Java的人，我希望能有一群和我一样去自学且痴迷于技术的爱好者，大家可以加我的q群：438581190，希望能一起学习，共同发展**

[09d97c3c7b968e22a2d1778fea5ae27f.png]: /images/20220608/dd1e0739120e4ccb8a1b2030ea13665a.png
[892cc3eb5c943a4c03514c43c4bd64bb.png]: /images/20220608/bba3caed6fc44ec185ec4ec08e107066.png
[87d507ba4460a3233ad72ee4d1e20f66.png]: /images/20220608/7b7cc4626c974239a341060a2ee6b3a9.png
[904df0c2fcd1b4a6f15008753cf52cb9.png]: /images/20220608/ddebccdf5c6b40c2ab4d4bc95fb8a6e7.png
[4a22049c775fed07701cd44198e21aad.png]: /images/20220608/efd1d5cddead4b75a41e8c8feb8cd2c9.png
[http_download.csdn.net_download_qq_36832411_9971701]: http://download.csdn.net/download/qq_36832411/9971701