条形码/二维码之开源利器ZXing图文介绍（转）

摘选：http://sjsky.iteye.com/blog/1142177

 

全文目录：

• 基本介绍
• 二维码（比如：QRCode）的编码和解码演示
• 条形码（比如：EAN-13）的编码和解码演示
  

【一】、 基本介绍 ：

 1-1. ZXing是一个开源Java类库用于解析多种格式的条形码和二维码.

官网：http://code.google.com/p/zxing/

截止目前为止最新版本为1.7，提供以下编码格式的支持：

• UPC-A and UPC-E
• EAN-8 and EAN-13
• Code 39
• Code 93
• Code 128
• QR Code
• ITF
• Codabar
• RSS-14 (all variants)
• Data Matrix
• PDF 417 ('alpha' quality)
• Aztec ('alpha' quality)

同时官网提供了 Android、cpp、C#、iPhone、j2me、j2se、jruby、objc、rim、symbian等多种应用的类库，具体详情可以参考下载的源码包中。

 

1-2. 本文和之前的那篇文章一样，主要是在PC上实现条形码（EAN-13）和二维码（QRCode） 的编码和解码的示例，以供大家参考，用到了源码中core和javase下面的相关源代码，附件提供自己编译之后的lib包：

• zxing.jar
• zxing-j2se.jar

有关各种手机系统的应用，有兴趣的朋友可以下载官方源码包，包下有具体详细的应用介绍。

【二】、 二维码（QRCode）的编码和解码演示：

 

 2-1. 编码示例：

package
 michael.zxing;

import
 java.io.File;
import
 java.util.Hashtable;

import
 com.google.zxing.BarcodeFormat;
import
 com.google.zxing.EncodeHintType;
import
 com.google.zxing.MultiFormatWriter;
import
 com.google.zxing.client.j2se.MatrixToImageWriter;
import
 com.google.zxing.common.BitMatrix;
import
 com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

/**
 * @blog http://sjsky.iteye.com
 * @author Michael
 */
public
 
class
 ZxingEncoderHandler {

    /**
     * 编码
     * @param contents
     * @param width
     * @param height
     * @param imgPath
     */
    public
 
void
 encode(String contents, 
int
 width, 
int
 height, String imgPath) {
        Hashtable<Object, Object> hints = new
 Hashtable<Object, Object>();
        // 指定纠错等级
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
        // 指定编码格式
        hints.put(EncodeHintType.CHARACTER_SET, "GBK"
);
        try
 {
            BitMatrix bitMatrix = new
 MultiFormatWriter().encode(contents,
                    BarcodeFormat.QR_CODE, width, height, hints);

            MatrixToImageWriter
                    .writeToFile(bitMatrix, "png"
, 
new
 File(imgPath));

        } catch
 (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * @param args
     */
    public
 
static
 
void
 main(String[] args) {
        String imgPath = "d:/test/twocode/michael_zxing.png"
;
        String contents = "Hello Michael(大大),welcome to Zxing!"
                + "\nMichael’s blog [ http://sjsky.iteye.com ]"
                + "\nEMail [ [e-mail] ]"
 + 
"\nTwitter [ @suncto ]"
;
        int
 width = 
300
, height = 
300
;
        ZxingEncoderHandler handler = new
 ZxingEncoderHandler();
        handler.encode(contents, width, height, imgPath);

        System.out.println("Michael ,you have finished zxing encode."
);
    }
}

 运行后生成的二维码图片如下：

                               
 和前篇介绍一样，用手机的二维码扫描软件（本人用的：android 快拍二维码 ）来测试下，识别成功的截图如下：

 

2-2. 解码示例：

package
 michael.zxing;

import
 java.awt.image.BufferedImage;
import
 java.io.File;
import
 java.util.Hashtable;

import
 javax.imageio.ImageIO;

import
 com.google.zxing.BinaryBitmap;
import
 com.google.zxing.DecodeHintType;
import
 com.google.zxing.LuminanceSource;
import
 com.google.zxing.MultiFormatReader;
import
 com.google.zxing.Result;
import
 com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import
 com.google.zxing.common.HybridBinarizer;

/**
 * @blog http://sjsky.iteye.com
 * @author Michael
 */
public
 
class
 ZxingDecoderHandler {

    /**
     * @param imgPath
     * @return String
     */
    public
 String decode(String imgPath) {
        BufferedImage image = null
;
        Result result = null
;
        try
 {
            image = ImageIO.read(new
 File(imgPath));
            if
 (image == 
null
) {
                System.out.println("the decode image may be not exit."
);
            }
            LuminanceSource source = new
 BufferedImageLuminanceSource(image);
            BinaryBitmap bitmap = new
 BinaryBitmap(
new
 HybridBinarizer(source));

            Hashtable<Object, Object> hints = new
 Hashtable<Object, Object>();
            hints.put(DecodeHintType.CHARACTER_SET, "GBK"
);

            result = new
 MultiFormatReader().decode(bitmap, hints);
            return
 result.getText();
        } catch
 (Exception e) {
            e.printStackTrace();
        }
        return
 
null
;
    }

    /**
     * @param args
     */
    public
 
static
 
void
 main(String[] args) {
        String imgPath = "d:/test/twocode/michael_zxing.png"
;
        ZxingDecoderHandler handler = new
 ZxingDecoderHandler();
        String decodeContent = handler.decode(imgPath);
        System.out.println("解码内容如下："
);
        System.out.println(decodeContent);
        System.out.println("Michael ,you have finished zxing decode."
);

    }
}

 

 

运行结果如下：

 

解码内容如下：
Hello Michael(大大),welcome to Zxing!
Michael’s blog [ http://sjsky.iteye.com ]
EMail [ [e-mail] ]
Twitter [ @suncto ]
Michael ,you have finished zxing decode.

  从测试结果可见：解码出的内容和之前编码的内容是一致

 

【三】、 条形码（EAN-13）的编码和解码演示：

 

 3-1. 编码示例：

package
 michael.zxing;

import
 java.io.File;

import
 com.google.zxing.BarcodeFormat;
import
 com.google.zxing.MultiFormatWriter;
import
 com.google.zxing.client.j2se.MatrixToImageWriter;
import
 com.google.zxing.common.BitMatrix;

/**
 * @blog http://sjsky.iteye.com
 * @author Michael
 */
public
 
class
 ZxingEAN13EncoderHandler {

    /**
     * 编码
     * @param contents
     * @param width
     * @param height
     * @param imgPath
     */
    public
 
void
 encode(String contents, 
int
 width, 
int
 height, String imgPath) {
        int
 codeWidth = 
3
 + 
// start guard
                (7
 * 
6
) + 
// left bars
                5
 + 
// middle guard
                (7
 * 
6
) + 
// right bars
                3
; 
// end guard
        codeWidth = Math.max(codeWidth, width);
        try
 {
            BitMatrix bitMatrix = new
 MultiFormatWriter().encode(contents,
                    BarcodeFormat.EAN_13, codeWidth, height, null
);

            MatrixToImageWriter
                    .writeToFile(bitMatrix, "png"
, 
new
 File(imgPath));

        } catch
 (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * @param args
     */
    public
 
static
 
void
 main(String[] args) {
        String imgPath = "d:/test/twocode/zxing_EAN13.png"
;
        // 益达无糖口香糖的条形码
        String contents = "6923450657713"
;

        int
 width = 
105
, height = 
50
;
        ZxingEAN13EncoderHandler handler = new
 ZxingEAN13EncoderHandler();
        handler.encode(contents, width, height, imgPath);

        System.out.println("Michael ,you have finished zxing EAN13 encode."
);
    }
}

6 923450 657713 对应的是益达无糖口香糖：

 

运行后生成的条形码图片如下：

                                          

用手机的扫描软件，识别成功的截图如下：

3-2. 解码示例：

package
 michael.zxing;

import
 java.awt.image.BufferedImage;
import
 java.io.File;

import
 javax.imageio.ImageIO;

import
 com.google.zxing.BinaryBitmap;
import
 com.google.zxing.LuminanceSource;
import
 com.google.zxing.MultiFormatReader;
import
 com.google.zxing.Result;
import
 com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import
 com.google.zxing.common.HybridBinarizer;

/**
 * @blog http://sjsky.iteye.com
 * @author Michael
 */
public
 
class
 ZxingEAN13DecoderHandler {

    /**
     * @param imgPath
     * @return String
     */
    public
 String decode(String imgPath) {
        BufferedImage image = null
;
        Result result = null
;
        try
 {
            image = ImageIO.read(new
 File(imgPath));
            if
 (image == 
null
) {
                System.out.println("the decode image may be not exit."
);
            }
            LuminanceSource source = new
 BufferedImageLuminanceSource(image);
            BinaryBitmap bitmap = new
 BinaryBitmap(
new
 HybridBinarizer(source));

            result = new
 MultiFormatReader().decode(bitmap, 
null
);
            return
 result.getText();
        } catch
 (Exception e) {
            e.printStackTrace();
        }
        return
 
null
;
    }

    /**
     * @param args
     */
    public
 
static
 
void
 main(String[] args) {
        String imgPath = "d:/test/twocode/zxing_EAN13.png"
;
        ZxingEAN13DecoderHandler handler = new
 ZxingEAN13DecoderHandler();
        String decodeContent = handler.decode(imgPath);
        System.out.println("解码内容如下："
);
        System.out.println(decodeContent);
        System.out.println("Michael ,you have finished zxing EAN-13 decode."
);

    }
}

 运行结果如下：

写道

解码内容如下：
6923450657713
Michael ,you have finished zxing decode.

 

从测试结果可见：解码出的内容和之前编码的内容是一致。

评论

2 楼 gentlesong88 2013-12-26  

赞一个 基础的操作都有了

1 楼 苇间风语 2012-12-05