1zxing介紹

二維碼的生成與解析。有多種途徑。我們選擇使用zxing，ZXing是一個開放源碼的，用Java實現的多種格式的1D/2D條碼圖像處理庫，它包含了聯繫到其他語言的端口。Zxing可以實現使用手機的內置的攝像頭完成條形碼的掃描及解碼。

2zxing下載

Jar下載路徑：

https://codeload.github.com/zxing/zxing/zip/master

3在項目中應用

3.1首先在項目裡面引入zxing jar

3.2新建TestZXing類，編寫產生二維碼代碼

package test;

import java.io.File;

import java.io.IOException;

import java.nio.file.Path;

import java.util.HashMap;

import com.google.zxing.BarcodeFormat;

import com.google.zxing.EncodeHintType;

import com.google.zxing.MultiFormatWriter;

import com.google.zxing.WriterException;

import com.google.zxing.client.j2se.MatrixToImageWriter;

import com.google.zxing.common.BitMatrix;

import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;

public class TestZXing {

@SuppressWarnings({ "rawtypes", "unchecked" })

public static void main(String[] args) {

int width=300;

int height=300;

String format="png";

String contents="www.baidu.com";

HashMap map=new HashMap();

map.put(EncodeHintType.CHARACTER_SET, "utf-8");

map.put(EncodeHintType.ERROR_CORRECTION,ErrorCorrectionLevel.M);

map.put(EncodeHintType.MARGIN, 0);

try {

BitMatrix bm = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height);

Path file=new File("D:/img.png").toPath();

MatrixToImageWriter.writeToPath(bm, format, file);

} catch (WriterException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

3.3創建TestRead類，編寫解析二維碼代碼，運行代碼，打印測試結果

package test;

import java.awt.image.BufferedImage;

import java.io.File;

import java.io.IOException;

import java.util.HashMap;

import javax.imageio.ImageIO;

import com.google.zxing.BinaryBitmap;

import com.google.zxing.EncodeHintType;

import com.google.zxing.MultiFormatReader;

import com.google.zxing.NotFoundException;

import com.google.zxing.Result;

import com.google.zxing.client.j2se.BufferedImageLuminanceSource;

import com.google.zxing.common.HybridBinarizer;

public class TestRead {

@SuppressWarnings({ "unchecked", "rawtypes" })

public static void main(String[] args) {

try {

MultiFormatReader reader=new MultiFormatReader();

File f=new File("D:/img.png");

BufferedImage image=ImageIO.read(f);

BinaryBitmap bb=new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));

HashMap map =new HashMap();

map.put(EncodeHintType.CHARACTER_SET, "utf-8");

Result result = reader.decode(bb,map);

System.out.println("解析結果："+result.toString());

System.out.println("二維碼格式類型："+result.getBarcodeFormat());

System.out.println("二維碼文本內容："+result.getText());

} catch (NotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

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