Java实现的生成二维码和解析二维码实现的生成二维码和解析二维码URL操作示例操作示例
主要介绍了Java实现的生成二维码和解析二维码URL操作,结合实例形式分析了Java创建与解析二维码,以及文件
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本文实例讲述了Java实现的生成二维码和解析二维码URL操作。分享给大家供大家参考,具体如下:
二维码依赖jar包,zxing
<!-- 二维码依赖 start -->
<dependency>
<groupId>com.google.zxing</groupId>
<artifactId>javase</artifactId>
<version>3.0.0</version>
</dependency>
createQRCode生成二维码,anlysisQRCode解析二维码
package com.xgt.util;
import com.google.zxing.*;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import sun.misc.BASE64Encoder;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.nio.file.Path;
import java.util.Hashtable;
public class QRCodeUtil {
private static final Logger logger = LoggerFactory.getLogger(QRCodeUtil.class);
/**
* 创建二维码
* @param url
* @param fileName
* @return
* @throws IOException
*/
public static String createQRCode(String url,String fileDirectory,String fileName) throws IOException {
int width = 500;
int height = 500;
String format = "png";
Hashtable hints = new Hashtable();
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(url, BarcodeFormat.QR_CODE, width, height, hints);
File fileDir = new File(fileDirectory);
FileToolUtil.judeDirExists(fileDir);
Path file = new File(fileDirectory,fileName+".png").toPath();//在D盘生成二维码图片
MatrixToImageWriter.writeToPath(bitMatrix, format, file);
BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix);
ByteArrayOutputStream os = new ByteArrayOutputStream();//新建流。
ImageIO.write(image, format, os);//利用ImageIO类提供的write方法,将bi以png图片的数据模式写入流。
byte b[] = os.toByteArray();//从流中获取数据数组。
String str = new BASE64Encoder().encode(b);
IOUtils.closeQuietly(os);
return str;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
//DeleteFileUtil.delete(fileDirectory);
}
return "NULL";
}
/**
* 解析出二维码的url
* 无用
* @param file
* @param fileDirectory
* @throws NotFoundException
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