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); } }} |
希望本文所述对大家java程序设计有所帮助。
原文链接：http://www.cnblogs.com/Java-Starter/p/9283513.html
