生成二维码
Java 生成二维码: 思路为拿到jar 包知道里面的方法使用
Step one ； 在https://github.com/zxing中下载（点击网页中名为 zxing 的a标签，跳转到源码页面，点击release 查看所有发布的源码，下载zip压缩文件
Step two: 解压文件后打开文件夹，将core包和javase包 中的com包拷贝到一java项目src目录下。右键导出 jar file 得到一个二维码开发的jar包
Step three: 进行二维码制作
import java.io.File;
import java.io.IOException;
import java.nio.file.Path;
import java.util.HashMap;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
public class CreateQRCode {
//生成二维码
public static void main(String[]
args) {
int width
= 300;
int height = 300;
String format = "png";
String content = "姓名：冯嘉伟";
//定义二维码参数
HashMap hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
hints.put(EncodeHintType.MARGIN, 2);
try {
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height,hints);
Path file = new File("D:/code/img.png").toPath();
MatrixToImageWriter.writeToPath(bitMatrix, format, file);//生成二维码
} catch
(Exception e) {
// TODO
Auto-generated catch block
e.printStackTrace();
}
}
}
二维码解析器
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import javax.imageio.ImageIO;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.Result;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.HybridBinarizer;
//解析二维码
public class ReadQRcode {
public static void main(String[] args) {
try {
MultiFormatReader formatReader = new MultiFormatReader();
File file = new File("D:/code/img.png");
BufferedImage image = ImageIO.read(file);
BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
HashMap hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
Result result = formatReader.decode(binaryBitmap,hints);
System.out.println("解析结果"+result.toString());
System.out.println("二维码格式类型"+result.getBarcodeFormat());
System.out.println("二维码文本内容"+result.getText());
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
通过JQuery生成二维码
第一步:
https://github.com/jeromeetienne/jquery-qrcode
第二步：release 下载 jquery 包
第三步： 在前端导入js 包
注意：<script type="text/javascript" src="<%request.getContextPath()%>">/js/jquery.min.js</script>
<script type="text/javascript"
src="<%request.getContextPath()%>">/js/jquery.qrcode.js</script>
这两个js包的顺序不能颠倒，否则会失败
详细的使用在一步网址中有how to use it
<script type="text/javascript" src="<%request.getContextPath()%>">/js/jquery.min.js</script>
<script type="text/javascript" src="<%request.getContextPath()%>">/js/jquery.qrcode.js</script>
<body>
"生成的二维码如下："<br>
<div id="qrcode">
</div>
<script type="text/javascript">
jQuery("#qrcode").qrcode("www.baidu.com");
</script>
</body>