Java实现的生成二维码和解析二维码URL操作示例_Java教程

Java实现的生成二维码和解析二维码URL操作示例

2021-05-17 14:22Rest探路者 Java教程

这篇文章主要介绍了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,以及文件读写等相关操作技巧,需要的朋友可以参考下

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

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									<!-- 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

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									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

									   */

									  public static void anlaysisqrcode(file file,string filedirectory) throws notfoundexception {

									    multiformatreader formatreader=new multiformatreader();

									    bufferedimage image=null;

									    try {

									      image = imageio.read(file);

									    binarybitmap binarybitmap =new binarybitmap(new hybridbinarizer(new bufferedimageluminancesource(image)));

									    hashtable hints=new hashtable();

									    hints.put(encodehinttype.character_set, "utf-8");

									    result result=formatreader.decode(binarybitmap,hints);

									    logger.info("解析结果："+result.tostring());

									    logger.info("解析格式:"+result.getbarcodeformat());

									    } catch (ioexception e) {

									      // todo auto-generated catch block

									      e.printstacktrace();

									    }finally {

									      deletefileutil.delete(filedirectory);

									    }

									  }

									}