二维码生成工具Java开发

本工具主要用于二维码生成,需要QRcode.jar包,核心代码类如下:

代码地址:https://github.com/qqedfr/qqqqq.git

package com.hy.shengcheng;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import javax.imageio.ImageIO;

import com.swetake.util.Qrcode;

import jp.sourceforge.qrcode.QRCodeDecoder;

import jp.sourceforge.qrcode.data.QRCodeImage;

import jp.sourceforge.qrcode.exception.DecodingFailedException;



public class QRCodeDecoderHandler {

   /**

     * 生成二维码(QRCode)图片

     * @param content 存储内容

     * @param imgPath 图片路径

     */

    public void encoderQRCode(String content, String imgPath) {  

        this.encoderQRCode(content, imgPath, "png", 7);  

    }  

       

    /**

     * 生成二维码(QRCode)图片

     * @param content 存储内容

     * @param output 输出流

     */

    public void encoderQRCode(String content, OutputStream output) {  

        this.encoderQRCode(content, output, "png", 7);  

    }  

       

    /**

     * 生成二维码(QRCode)图片 12

     * @param content 存储内容

     * @param imgPath 图片路径

     * @param imgType 图片类型

     */

    public void encoderQRCode(String content, String imgPath, String imgType) {  

        this.encoderQRCode(content, imgPath, imgType, 7);  

    }  

       

    /**

     * 生成二维码(QRCode)图片

     * @param content 存储内容

     * @param output 输出流

     * @param imgType 图片类型

     */

    public void encoderQRCode(String content, OutputStream output, String imgType) {  

        this.encoderQRCode(content, output, imgType, 7);  

    }  

   

    /**

     * 生成二维码(QRCode)图片

     * @param content 存储内容

     * @param imgPath 图片路径

     * @param imgType 图片类型

     * @param size 二维码尺寸

     */

    public void encoderQRCode(String content, String imgPath, String imgType, int size) {  

        try {  

            BufferedImage bufImg = this.qRCodeCommon(content, imgType, size);  

               

            File imgFile = new File(imgPath);  

            // 生成二维码QRCode图片  

            ImageIO.write(bufImg, imgType, imgFile);  

        } catch (Exception e) {  

            e.printStackTrace();  

        }  

    }  

   

    /**

     * 生成二维码(QRCode)图片

     * @param content 存储内容

     * @param output 输出流

     * @param imgType 图片类型

     * @param size 二维码尺寸

     */

    public void encoderQRCode(String content, OutputStream output, String imgType, int size) {  

        try {  

            BufferedImage bufImg = this.qRCodeCommon(content, imgType, size);  

            // 生成二维码QRCode图片  

            ImageIO.write(bufImg, imgType, output);  

        } catch (Exception e) {  

            e.printStackTrace();  

        }  

    }  

       

    /**

     * 生成二维码(QRCode)图片的公共方法

     * @param content 存储内容

     * @param imgType 图片类型

     * @param size 二维码尺寸

     * @return

     */

    private BufferedImage qRCodeCommon(String content, String imgType, int size) {  

        BufferedImage bufImg = null;  

        try {  

            Qrcode qrcodeHandler = new Qrcode();  

            // 设置二维码排错率,可选L(7%)、M(15%)、Q(25%)、H(30%),排错率越高可存储的信息越少,但对二维码清晰度的要求越小  

            qrcodeHandler.setQrcodeErrorCorrect('M');  

            qrcodeHandler.setQrcodeEncodeMode('B');  

            // 设置设置二维码尺寸,取值范围1-40,值越大尺寸越大,可存储的信息越大  

            qrcodeHandler.setQrcodeVersion(size);  

            // 获得内容的字节数组,设置编码格式  

            byte[] contentBytes = content.getBytes("utf-8");  

            // 图片尺寸  

            int imgSize = 67 + 12 * (size - 1);  

            bufImg = new BufferedImage(imgSize, imgSize, BufferedImage.TYPE_INT_RGB);  

            Graphics2D gs = bufImg.createGraphics();  

            // 设置背景颜色  

            gs.setBackground(Color.WHITE);  

            gs.clearRect(0, 0, imgSize, imgSize);  

   

            // 设定图像颜色> BLACK  

            gs.setColor(Color.BLACK);  

            // 设置偏移量,不设置可能导致解析出错  

            int pixoff = 2;  

            // 输出内容> 二维码  

            if (contentBytes.length > 0 && contentBytes.length < 800) {  

                boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes);  

                for (int i = 0; i < codeOut.length; i++) {  

                    for (int j = 0; j < codeOut.length; j++) {  

                        if (codeOut[j][i]) {  

                            gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3);  

                        }  

                    }  

                }  

            } else {  

                throw new Exception("QRCode content bytes length = " + contentBytes.length + " not in [0, 800].");  

            }  

            gs.dispose();  

            bufImg.flush();  

        } catch (Exception e) {  

            e.printStackTrace();  

        }  

        return bufImg;  

    }  

       

    /**

     * 解析二维码(QRCode)

     * @param imgPath 图片路径

     * @return

     */

    public String decoderQRCode(String imgPath) {  

        // QRCode 二维码图片的文件  

        File imageFile = new File(imgPath);  

        BufferedImage bufImg = null;  

        String content = null;  

        try {  

            bufImg = ImageIO.read(imageFile);  

            QRCodeDecoder decoder = new QRCodeDecoder();  

            content = new String(decoder.decode(new TwoDimensionCodeImage(bufImg)), "utf-8");   

        } catch (IOException e) {  

            System.out.println("Error: " + e.getMessage());  

            e.printStackTrace();  

        } catch (DecodingFailedException dfe) {  

            System.out.println("Error: " + dfe.getMessage());  

            dfe.printStackTrace();  

        }  

        return content;  

    }  

       

    /**

     * 解析二维码(QRCode)

     * @param input 输入流

     * @return

     */

    public String decoderQRCode(InputStream input) {  

        BufferedImage bufImg = null;  

        String content = null;  

        try {  

            bufImg = ImageIO.read(input);  

            QRCodeDecoder decoder = new QRCodeDecoder();  

            content = new String(decoder.decode(new TwoDimensionCodeImage(bufImg)), "utf-8");   

        } catch (IOException e) {  

            System.out.println("Error: " + e.getMessage());  

            e.printStackTrace();  

        } catch (DecodingFailedException dfe) {  

            System.out.println("Error: " + dfe.getMessage());  

            dfe.printStackTrace();  

        }  

        return content;  

    }  

   

    public static void main(String[] args) {  

        String imgPath = "";  

        String encoderContent = "1314520";  

        QRCodeDecoderHandler handler = new QRCodeDecoderHandler();  

       // 生成二维码

        handler.encoderQRCode(encoderContent, imgPath, "png");  

      try {  

          OutputStream output = new FileOutputStream(imgPath);  

          handler.encoderQRCode(encoderContent, output);  

      } catch (Exception e) {  

          e.printStackTrace();  

      }  

        System.out.println("========encoder success");  

           

        //解析二维码

        String decoderContent = handler.decoderQRCode(imgPath);  

        System.out.println("解析结果如下:");  

        System.out.println(decoderContent);  

        System.out.println("========decoder success!!!");  

    }    

}



class TwoDimensionCodeImage implements QRCodeImage  {

   BufferedImage bufImg;   

       public TwoDimensionCodeImage(BufferedImage bufImg) {  

           this.bufImg = bufImg;  

       }         

       @Override

       public int getHeight() {  

           return bufImg.getHeight();  

       }    

       @Override

       public int getPixel(int x, int y) {  

           return bufImg.getRGB(x, y);  

       }      

       @Override

       public int getWidth() {  

           return bufImg.getWidth();  

       }  

}

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