package test;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.imageio.ImageIO;
import com.swetake.util.Qrcode;
/**
* QRCode方式生成二维码
* @author
*
*/
public class QRCodeEncoderHandler {
public void encoderQRCode(String content, String imgPath) {
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('H');
qrcodeHandler.setQrcodeEncodeMode('B');
qrcodeHandler.setQrcodeVersion(5);
System.out.println(content);
byte[] contentBytes = content.getBytes("gb2312");
BufferedImage bufImg = new BufferedImage(115, 115,
BufferedImage.TYPE_INT_RGB);
Graphics2D gs = bufImg.createGraphics();
gs.setBackground(Color.WHITE);
gs.clearRect(0, 0, 115, 115);
// 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 {
System.err.println("QRCode content bytes length = "
+ contentBytes.length + " not in [ 0,120 ]. ");
}
gs.dispose();
bufImg.flush();
File imgFile = new File(imgPath);
if(!imgFile.exists()){
imgFile.mkdirs();
}
// 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) {
//取当前时间为图片名称 带毫秒的
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
Date d = new Date();
String str = sdf.format(d);
String imgPath = "D:/qrcode/" + str + ".png";
String content = "这是测试";
QRCodeEncoderHandler handler = new QRCodeEncoderHandler();
handler.encoderQRCode(content, imgPath);
System.out.println("imgPath:" + imgPath);
System.out.println("encoder QRcode success");
}
}
package test;
import com.google.zxing.common.BitMatrix;
import javax.imageio.ImageIO;
import java.io.File;
import java.io.OutputStream;
import java.io.IOException;
import java.awt.image.BufferedImage;
public final class MatrixToImageWriter {
private static final int BLACK = 0xFF000000;
private static final int WHITE = 0xFFFFFFFF;
private MatrixToImageWriter() {
}
public static BufferedImage toBufferedImage(BitMatrix matrix) {
int width = matrix.getWidth();
int height = matrix.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, matrix.get(x, y) ? BLACK : WHITE);
}
}
return image;
}
public static void writeToFile(BitMatrix matrix, String format, File file)
throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, file)) {
throw new IOException("Could not write an image of format "
+ format + " to " + file);
}
}
public static void writeToStream(BitMatrix matrix, String format,
OutputStream stream) throws IOException {
BufferedImage image = toBufferedImage(matrix);
if (!ImageIO.write(image, format, stream)) {
throw new IOException("Could not write an image of format "
+ format);
}
}
}
package test;
import java.io.File;
import java.util.HashMap;
import java.util.Map;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
public class ZxingTest {
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) {
try {
String content = "这是测试xing二维码生成";
//String path = ServletActionContext.getServletContext().getRealPath("/"); //路径
String path = "D:/qrcode/ssdddd";
MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
Map hints = new HashMap();
// 内容所使用编码
hints.put(EncodeHintType.CHARACTER_SET, "gb2312");
BitMatrix bitMatrix = multiFormatWriter.encode(content,
BarcodeFormat.QR_CODE, 400, 400, hints);
// 生成二维码
File outputFile = new File(path, "xx.jpg");
//路径不在，创建
if(!outputFile.exists()){
outputFile.mkdirs();
}
MatrixToImageWriter.writeToFile(bitMatrix, "jpg", outputFile);
} catch (Exception e) {
e.printStackTrace();
}
}
}
//传到页面
package test;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class CodeServlet
*/
@WebServlet("/CodeServlet")
public class CodeServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String content = "姓名:wusir 电话:123687495";
EncoderHandler encoder = new EncoderHandler();
encoder.encoderQRCoder(content, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doGet(request, response);
}
}
//页面代码
<img style="height:180px;width:180px" src="./CodeServlet"/>