java生成二维码、窗体程序 完整源码

今天为大家分享一个java语言生成二维码的程序，目前系统已经完成了初步功能，后续会进一步完善。整个系统界面漂亮，有完整源码，希望大家可以喜欢。喜欢的帮忙点赞和关注。一起编程、一起进步

开发环境

开发语言为Java，开发环境Eclipse或者IDEA都可以，无需要数据库。运行主程序，或者执行打开JAR文件即可以运行本程序。

系统框架

利用JDK自带的SWING框架开发，下载。纯窗体模式，直接运行Main文件即可以。同时带有详细得设计文档。

主要功能

功能点归纳

本系统主要是根据需要生成动态的二维码，主要功能点有以下几点

1 动态生成二维码的内容

2 动态生成二维码的LOGO

3 对生成的二维码图片进行保存，保存到本地机器上

技术要点

1 生成二维码采用的是google的开源技术zxing，ZXing是一个开放源码的，用Java实现的多种格式的1D/2D条码图像处理库，它包含了联系到其他语言的端口。Zxing可以实现使用手机的内置的摄像头完成条形码的扫描及解码。

2 zxing官网生成二维码有详细的文档，可以参考

public static String decode(File file) throws Exception {
        BufferedImage image;
        image = ImageIO.read(file);
        if (image == null) {
            return null;
        }
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(
                image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Result result;
        Hashtable hints = new Hashtable();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();
        return resultStr;
    }

实现效果

主要代码

package com;



import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;

import javax.imageio.ImageIO;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.filechooser.FileNameExtensionFilter;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * 二维码工具类 
 */
public class QRCodeUtil {
    
    private static JFileChooser filechooser = new JFileChooser();
    private static BufferedImage image;
    private static File out = new File("new.jpg");
    private static final String CHARSET = "utf-8";
    private static final String FORMAT_NAME = "JPG";
    private static final int QRCODE_SIZE = 200;// 二维码尺寸
    private static final int WIDTH = 60;// LOGO宽度
    private static final int HEIGHT = 60;// LOGO高度

    private static BufferedImage createImage(String content, String imgPath,
            boolean needCompress) throws Exception {
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content,
                BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
        int width = bitMatrix.getWidth();
        int height = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(width, height,
                BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < width; x++) {
            for (int y = 0; y < height; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000
                        : 0xFFFFFFFF);
            }
        }
        if (imgPath == null || "".equals(imgPath)) {
            return image;
        }
        // 插入图片
        QRCodeUtil.insertImage(image, imgPath, needCompress);
        return image;
    }

    /**
     * 插入LOGO
     * @param source 二维码图片
     * @param imgPath LOGO图片地址
     * @param needCompress  是否压缩
     * @throws Exception
     */
    private static void insertImage(BufferedImage source, String imgPath,
            boolean needCompress) throws Exception {
        File file = new File(imgPath);
        if (!file.exists()) {
            return;
        }
        Image src = ImageIO.read(new File(imgPath));
        int width = src.getWidth(null);
        int height = src.getHeight(null);
        if (needCompress) { // 压缩LOGO
            if (width > WIDTH) {
                width = WIDTH;
            }
            if (height > HEIGHT) {
                height = HEIGHT;
            }
            Image image = src.getScaledInstance(width, height,
                    Image.SCALE_SMOOTH);
            BufferedImage tag = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
            Graphics g = tag.getGraphics();
            g.drawImage(image, 0, 0, null); // 绘制缩小后的图
            g.dispose();
            src = image;
        }
        // 插入LOGO
        Graphics2D graph = source.createGraphics();
        int x = (QRCODE_SIZE - width) / 2;
        int y = (QRCODE_SIZE - height) / 2;
        graph.drawImage(src, x, y, width, height, null);
        Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
        graph.setStroke(new BasicStroke(3f));
        graph.draw(shape);
        graph.dispose();
    }

    /**
     * 生成二维码(内嵌LOGO)
     * @param content 内容
     * @param imgPath LOGO地址
     * @param needCompress 是否压缩LOGO
     * @param panel 放入的面板          
     * @throws Exception
     */
    public static void encode1(String content, String imgPath, 
            boolean needCompress,JPanel panel) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,
                needCompress);
        ImageIO.write(image, FORMAT_NAME, new File("new.jpg"));
        
        hq(panel);
    }

    /**图片当做面板背景投放*/
    private static void hq(JPanel panel) {
        // TODO Auto-generated method stub
        try {
            image = ImageIO.read(out);
            BackgroundPanel b = new BackgroundPanel(image);
            panel.removeAll();
            panel.add(b);
            panel.repaint();
        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        
        out.delete();
    }


    /**
     * 生成二维码
     * @param content 内容
     * @throws Exception
     */
    public static void encode(String content,JPanel panel) throws Exception {
        QRCodeUtil.encode1(content, content, false, panel);
    }


    /**
     * 解析二维码
     * @param file 二维码图片
     * @throws Exception
     * @return
     */
    public static String decode(File file) throws Exception {
        BufferedImage image;
        image = ImageIO.read(file);
        if (image == null) {
            return null;
        }
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(
                image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Result result;
        Hashtable hints = new Hashtable();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();
        return resultStr;
    }

    /**
     * 解析二维码
     * @param path 二维码图片地址
     * @throws Exception
     * @return
     */
    public static String decode(String path) throws Exception {
        return QRCodeUtil.decode(new File(path));
    }
    
    
    /**保存二维码*/
    public static void Save(){
        if(image == null)
            JOptionPane.showMessageDialog(null, "没有二维码!","提醒",JOptionPane.ERROR_MESSAGE);
        else{
            filechooser.setFileFilter(new FileNameExtensionFilter("jpg/png", new String[] { "jpg","png"}));
            filechooser.setCurrentDirectory(new File("D:\\"));
            filechooser.setDialogTitle("保存图片");
            int i = filechooser.showSaveDialog(null);
            if(i == 0){
                File file = null;
                String filename = filechooser.getSelectedFile().getName();
                if(filename.substring(filename.length() - 1, filename.length()).equals(".")){
                    file = new File(filechooser.getSelectedFile()+".jpg");
                }else{
                    if(filename.indexOf(".jpg") < 0 && filename.indexOf(".png") < 0 && filename.indexOf(".") < 0)
                        file = new File(filechooser.getSelectedFile()+".jpg");
                    else
                        file = new File(filechooser.getSelectedFile()+"");
                }
                try {
                    ImageIO.write(image, "jpg", file);
                } catch (IOException e1) {
                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            }
        }
    }
}