package QRCode;import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;import javax.imageio.ImageIO;import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;/*** 需求说明：卖家在一个实体产品上贴一个二维码，买家收货后，微信扫码获取产品的详细信息* 实现说明：卖家在出货前，把服务器上的产品详情页的链接地址（含有ID）生成二维码，买家收货后微信扫码，跳转到产品信息页即可查看* 需要jar:zxing-code-2.3.jar,下载地址http://download.csdn.net/download/sanfye/8704583* @author 加内特**/
public class GenerateCode {private static final int BLACK = 0xFF000000;private static final int WHITE = 0xFFFFFFFF;public static void main(String[] args) {try {boolean flag = generateCode("518");if (flag) {System.out.println("成功生成二维码");}} catch (WriterException | IOException e) {System.err.println("生成二维码失败");e.printStackTrace();}}public static boolean generateCode(String productId) throws WriterException, IOException {// 这里是URL，扫描之后就跳转到这个界面String text = "https://www.baidu.com/?uudi=" + productId;String path = "E:/"; // 图片生成的位置int width = 400;int height = 400;// 二维码图片格式String format = "jpg";// 设置编码，防止中文乱码Hashtable<EncodeHintType, Object> ht = new Hashtable<EncodeHintType, Object>();ht.put(EncodeHintType.CHARACTER_SET, "UTF-8");// 设置二维码参数(编码内容，编码类型，图片宽度，图片高度,格式)BitMatrix bitMatrix = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, ht);// 生成二维码(定义二维码输出服务器路径)File outputFile = new File(path);if (!outputFile.exists()) {// 创建文件夹outputFile.mkdir();}int b_width = bitMatrix.getWidth();int b_height = bitMatrix.getHeight();// 建立图像缓冲器BufferedImage image = new BufferedImage(b_width, b_height, BufferedImage.TYPE_3BYTE_BGR);for (int x = 0; x < b_width; x++) {for (int y = 0; y < b_height; y++) {image.setRGB(x, y, bitMatrix.get(x, y) ? BLACK : WHITE);}}// 生成二维码ImageIO.write(image, format, new File(path + "/code." + format));// 二维码的名称// code.jpgreturn true;}
}