Java实现的生成二维码和解析二维码URL操作示例

<!-- 二维码依赖 start -->

<dependency>

   <groupid>com.google.zxing</groupid>

   <artifactid>javase</artifactid>

   <version> 3.0 . 0 </version>

</dependency>

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);

     }

   }

}