MarchQRShow

 

FileDepart

package march.io;

import java.io.*;

public class FileDepart {

    public static void main(String[] args) throws Exception{
        String sourceFile = "C:\\Users\\Administrator\\Desktop\\xpath\\run.zip";
        String descDir = "C:\\Users\\Administrator\\Desktop\\xpath\\runDepart";
        int blockSize = 512;

        byte[] fileData = readFile(sourceFile);
        int eIndex = 0;int sIndex = 0;int fileName = 0;
        while (eIndex!=fileData.length-1){
            fileName++;
            eIndex = fileName*blockSize-1;
            if(eIndex>fileData.length-1){
                eIndex=fileData.length-1;
            }
            byte[] outputData = new byte[eIndex-sIndex+1];
            for(int i=0;i<outputData.length;i++){
                outputData[i] = fileData[sIndex+i];
            }
            System.out.println((fileData.length-1)+" "+eIndex);
            writeFileBlock(descDir,fileName,outputData);
            sIndex= eIndex+1;
        }
    }

    public static byte[] readFile(String fileName) throws Exception{
        FileInputStream fileInputStream = new FileInputStream(fileName);
        DataInputStream dataInputStream = new DataInputStream(fileInputStream);
        byte[] res = new byte[dataInputStream.available()];
        dataInputStream.readFully(res);
        fileInputStream.close();
        return res;
    }

    public static void writeFileBlock(String savePath,int blockName,byte[] data) throws Exception{
        String fileString = blockName+" "+bytesToHexString(data);

        File file = new File(savePath+"/"+blockName+".txt");
        if(!file.exists()){
            file.createNewFile();
        }
        FileWriter fileWriter = new FileWriter(file);
        BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);
        bufferedWriter.write(fileString);
        bufferedWriter.close();
    }

    public static String bytesToHexString(byte[] src){
        StringBuilder stringBuilder = new StringBuilder("");
        if (src == null || src.length <= 0) {
            return null;
        }
        for (int i = 0; i < src.length; i++) {
            int v = src[i] & 0xFF;
            String hv = Integer.toHexString(v);
            if (hv.length() < 2) {
                stringBuilder.append(0);
            }
            stringBuilder.append(hv);
        }
        return stringBuilder.toString();
    }

    public static byte[] hexStringToBytes(String hexString) {
        if (hexString == null || hexString.equals("")) {
            return null;
        }
        hexString = hexString.toUpperCase();
        int length = hexString.length() / 2;
        char[] hexChars = hexString.toCharArray();
        byte[] d = new byte[length];
        for (int i = 0; i < length; i++) {
            int pos = i * 2;
            d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
        }
        return d;
    }

    private static byte charToByte(char c) {
        return (byte) "0123456789ABCDEF".indexOf(c);
    }
}

QRShow

package march.io;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.HashMap;
import java.util.Map;

public class QRShow extends JFrame {
    private String _sourcePath;
    private int _qrCodeSizeW = 800;
    private int _qrCodeSizeH = 800;
    JTextField textField = new JTextField("0",20);
    ImagePanel imagePanel = null;

    public static void main(String[] args){
        String sourcePath ="C:\\Users\\Administrator\\Desktop\\xpath\\runDepart";
        int qrCodeSizeW = 1000;
        int qrCodeSizeH = 1000;
        QRShow q = new QRShow(sourcePath,qrCodeSizeW,qrCodeSizeH);
    }

    public QRShow(String sourcePath,int qrCodeSizeW,int qrCodeSizeH){
        this._sourcePath = sourcePath;
        this._qrCodeSizeW = qrCodeSizeW;
        this._qrCodeSizeH = qrCodeSizeH;
        imagePanel = new ImagePanel(this);
        init();
        this.setSize(new Dimension(800,600));
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        this.setVisible(true);
    }

    public void init(){
        this.setLayout(new BorderLayout(10,5));
        JPanel panel = new JPanel();
        panel.setLayout(new GridLayout(20,1));
        final JButton btnNext = new JButton("->");
        final JButton btnPre = new JButton("<-");
        panel.add(textField);
        panel.add(btnPre);
        panel.add(btnNext);
        this.add(panel,BorderLayout.EAST);
        this.add(imagePanel,BorderLayout.CENTER);
        Toolkit.getDefaultToolkit().addAWTEventListener(new AWTEventListener() {
            public void eventDispatched(AWTEvent event) {
                if(event.getID()==KeyEvent.KEY_PRESSED){
                    switch (((KeyEvent)event).getKeyCode()) {
                        case KeyEvent.VK_RIGHT:
                            btnNext.doClick();
                            break;
                        case KeyEvent.VK_LEFT:
                            btnPre.doClick();
                            break;
                    }
                }
            }
        }, AWTEvent.KEY_EVENT_MASK);

        btnNext.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                showQr(true);
            }
        });
        btnPre.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                showQr(false);
            }
        });
    }

    public void showQr(boolean next){
        try{
            int blockName = Integer.parseInt(this.textField.getText());
            blockName = next?(blockName+1):(blockName-1);
            imagePanel.displayBlock(blockName);
            this.textField.setText(blockName+"");
        }catch (Exception e){
            //e.printStackTrace();
        }
    }

    public class ImagePanel extends JPanel{
        public Image image;
        private QRShow _qrShow;

        ImagePanel(QRShow qrShow){
            _qrShow = qrShow;
        }

        public void displayBlock(int blockName){
            String filePath = _sourcePath+"/"+blockName+".txt";
            File file = new File(filePath);
            if(file.exists()){
                try {
                    FileReader fileReader = new FileReader(file);
                    BufferedReader bufferedReader = new BufferedReader(fileReader);
                    String dataString = bufferedReader.readLine();
                    bufferedReader.close();
                    this.image = getBarCode(dataString);
                    this.repaint();
                    _qrShow.setTitle(blockName+"");
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }else{
                _qrShow.setTitle("-------");
            }
        }

        public Image getBarCode(String fileString){
            try {
                Map<EncodeHintType,String> map =new HashMap<EncodeHintType, String>();
                map.put(EncodeHintType.CHARACTER_SET,"UTF-8");
                map.put(EncodeHintType.MARGIN,"0");
                BitMatrix bitMatrix = new MultiFormatWriter().encode(fileString, BarcodeFormat.QR_CODE,_qrCodeSizeW,_qrCodeSizeH,map);
                BufferedImage bufferedImage = MatrixToImageWriter.toBufferedImage(bitMatrix);
                return bufferedImage;
            }catch (Exception e) {
                e.printStackTrace();
            }
            return null;
        }

        public void paint(Graphics graphics){
            super.paint(graphics);
            graphics.drawImage(image,0,0,this.getSize().height,this.getSize().height,null);
        }
    }
}

pom

<?xml version="1.0" encoding="UTF-8"?>
<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>march.io</groupId>
    <artifactId>march-qrcode</artifactId>
    <version>1.0-SNAPSHOT</version>

    <dependencies>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.3.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>3.3.0</version>
        </dependency>
    </dependencies>
</project>