二维码生成 以下是生成二维码的简单实例： package com.weixin.demo; import java.awt.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import javax.imageio.ImageIO; import com.swetake.util.Qrcode; /** * 二维码生成器 * @blog http://www.baidu.com * @author Michael */ public class QRCodeEncoderHandler { /** * 生成二维码(QRCode)图片 * @param content * @param imgPath */ public void encoderQRCode(String content, String imgPath) { try { Qrcode qrcodeHandler = new Qrcode(); qrcodeHandler.setQrcodeErrorCorrect('M'); qrcodeHandler.setQrcodeEncodeMode('B'); qrcodeHandler.setQrcodeVersion(7); System.out.println(content); byte[] contentBytes = content.getBytes("gb2312"); BufferedImage bufImg = new BufferedImage(140, 140, BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufImg.createGraphics(); gs.setBackground(Color.WHITE); gs.clearRect(0, 0, 140, 140); // 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 < 120) { boolean[][] 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, 3); } } } } else { System.err.println("QRCode content bytes length = " + contentBytes.length + " not in [ 0,120 ]. "); } gs.dispose(); bufImg.flush(); File imgFile = new File(imgPath); // 生成二维码QRCode图片 ImageIO.write(bufImg, "png", imgFile); } catch (Exception e) { e.printStackTrace(); } } /** * @param args the command line arguments */ public static void main(String[] args) { String imgPath = "F:/Michael_QRCode.png"; codeOut = String content = "http://www.baidu.com"; QRCodeEncoderHandler handler = new QRCodeEncoderHandler(); handler.encoderQRCode(content, imgPath); System.out.println("encoder QRcode success"); } } 本文来源：https://www.wddqw.com/doc/83e97eff71fe910ef12df8fa.html