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生成和识别图片二维码

2018-03-22 10:39 190 查看

1、引入pom文件

<!-- zxing -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>core</artifactId>
<version>3.2.1</version>
</dependency>
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.2.1</version>
</dependency>

2、生成和读取二维码/**
* 生成二维码
*/
public class CreateQrCode {

public static void main(String[] args) {
int width = 300;
int height = 300;
String format = "png";
String content = "www.baidu.com";
//定义二维码的参数
HashMap map = new HashMap();
//设置编码
map.put(EncodeHintType.CHARACTER_SET, "utf-8");
//设置纠错等级
map.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
map.put(EncodeHintType.MARGIN, 2);

try {
//生成二维码
BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height);
Path file = new File("E:/pic/test.png").toPath();
MatrixToImageWriter.writeToPath(bitMatrix, format, file);
} catch (WriterException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}

/**
* 读取二维码
*/
public class ReadQrCode {

public static void main(String[] args) {
try {
MultiFormatReader multiFormatReader = new MultiFormatReader();
File file = new File("E:/pic/test.png");
BufferedImage image = ImageIO.read(file);
//定义二维码参数
Map hints = new HashMap();
hints.put(EncodeHintType.CHARACTER_SET,"utf-8");

//获取读取二维码结果
BinaryBitmap binaryBitmap = new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
Result result = multiFormatReader.decode(binaryBitmap, hints);

System.out.println("读取二维码： " + result.toString());
System.out.println("二维码格式： " + result.getBarcodeFormat());
System.out.println("二维码内容： " + result.getText());
} catch (NotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}

jquery.qrcode.js

1、引入jquery.min.js、jquery.qrcode.min.js
2、页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>二维码</title>
<%
String path = request.getContextPath();
String bathPath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort();
pageContext.setAttribute("path", path);
pageContext.setAttribute("bathPath", bathPath);
%>
<script type="text/javascript" src="${path }/js/jquery.min.js"></script>
<script type="text/javascript" src="${path }/js/jquery.qrcode.min.js"></script>
</head>
<body>
生成的二维码： <br/>
<div id="qrcode"></div>
<script type="text/javascript">
$('#qrcode').qrcode("www.shuai.cn");
</script>
</body>

</html>

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