OpenJWeb新增二维码图片生成功能

在开发进销存软件的时候需要考虑企业***二维码的功能。专业的二维码打印软件可以读入文本文件或者数据库字段，把字符串转换成二维码图片。当然使用java程序也可以生成二维码图片，并且可以把二维码图片反向解析出对应的字符串编码。下面介绍二维码图片生成及反向解析的过程：

package com.openjweb.erp.barcode;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Reader;
import com.google.zxing.ReaderException;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
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.encoder.ByteMatrix;

//http://hi.baidu.com/baid/blog/item/fd446e06d199a77702088102.html
//http://www.4ucode.com/Study/Topic/1162485
//http://www.baishaode.com/blog/?p=436
public class QRCodeGen
{
/**
* 生成二维码图片
* @param code 待生成图片的二维码
* @param destFile 生成二维码图片存储的文件
*/
public static void createQRCodePic(String code,String destFile)
{
BitMatrix byteMatrix;
try
{
byteMatrix = new MultiFormatWriter()
.encode(code,BarcodeFormat.QR_CODE, 200, 200);
File file = new File(destFile);
MatrixToImageWriter.writeToFile(byteMatrix, destFile.substring(destFile.lastIndexOf(".")+1), file);
}
catch (IOException e)
{
e.printStackTrace();
}
catch (WriterException e1)
{
e1.printStackTrace();
}
}

/**
* 反向解析二维码
* @param picFile
* @return
*/
public static String decodeQRCode(String imgPath,String charset)
{
String code = "";
try
{
Reader reader = new MultiFormatReader();
File file = new File(imgPath);
BufferedImage image;
try
{
image = ImageIO.read(file);
if (image == null)
{
System.out.println("Could not decode image");
}
LuminanceSource source = new BufferedImageLuminanceSource(image);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Result result;
Hashtable hints= new Hashtable();
hints.put(DecodeHintType.CHARACTER_SET, charset); //utf-8
//解码设置编码方式为：utf-8，
result = new MultiFormatReader().decode(bitmap,hints);
String resultStr = result.getText();
code = resultStr;
System.out.println("解析后内容："+resultStr);
}
catch (IOException ioe)
{
System.out.println(ioe.toString());
}
catch (ReaderException re)
{
System.out.println(re.toString());
}
}
catch(Exception ex)
{
System.out.println(ex.toString());
}
return code;
}

public static void main(String[] args) {
String str = "test";//二维码内容
String path = "d:/test";
BitMatrix byteMatrix;
try
{
byteMatrix = new MultiFormatWriter().encode(str,BarcodeFormat.QR_CODE, 200, 200);
File file = new File(path + ".png");
MatrixToImageWriter.writeToFile(byteMatrix, "png", file);
} catch (IOException e) {
e.printStackTrace();
} catch (WriterException e1) {
e1.printStackTrace();
}
}
}



jsp调用示例：

<%@ page contentType="text/html;charset=UTF-8"%>
<%@ page import="java.util.*"%>
<%@ page import="com.openjweb.erp.barcode.*"%>

<%
try
{
//测试通过程序生成二维码图形
//String encodeStr = "中华人民共和国";
//String encodeStr = "http://www.openjweb.com";

String encodeStr = "老婆我爱你!";

out.println("QRCode二维码测试:"+encodeStr+"<br>");
encodeStr = new String(encodeStr.getBytes("utf-8"), "ISO-8859-1");//转换成ISO-8859-1
String imgPath = "d:/barcode.png";
QRCodeGen.createQRCodePic(encodeStr,imgPath);

out.println("对生成的文件进行解码,读取生成的图片:");
String decode = QRCodeGen.decodeQRCode(imgPath,"utf-8"); //还原成utf-8编码
out.println(decode);

}
catch(Exception ex)
{
ex.printStackTrace();
}
%>

生成的二维码图片：





信息化时代宣泄爱情的最微妙的方式是什么呢？送给太太一个二维码图片，见上图。