Java生成二维码

package com.liuxingyu;

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;

public class Dimensional{
/**
* 生成二维码(QRCode)图片
* @param content
* @param imgPath
*/
public static void encodeQr(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.setColor.WHITE);
gs.clearRect(0, 0, 140, 140);

// 设定图像颜色> BLACK
gs.setColor(Color.BLUE);

// 设置偏移量
int pixoff = 2;
// 将内容输出到图片中
if (contentBytes.length > 0 && contentBytes.length < 123) {
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 {
System.err.println("QRCode content bytes length = " + contentBytes.length + " not in [ 0,123 ]. ");
}
gs.dispose();
bufImg.flush();
File imgFile = new File(imgPath);
// 生成二维码图片
ImageIO.write(bufImg, "png", imgFile);
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
String imgPath = "D:/Workspaces/2013/Dimensional_code/WebRoot/WEB-INF/img/qrcode.png";
String content = "http://www.liuxingyu.com";
encodeQr(content, imgPath);
System.out.println("encode success");
}
}