Barcode generation and decoding, QR code generation and decoding

Barcode generation and decoding 、 Two dimensional code generation and decoding

Not much to say , Go straight to the code ：

import java.awt.image.BufferedImage;
import java.io.File;
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.EncodeHintType;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
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;

public class Test {
    

	/** *  Bar code coding  * @param contents * @param width * @param height * @param imgPath */
	public static 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();
		}
	}

	/** *  Barcode decoding  * @param imgPath * @return String */
	public static 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;
	}
	
	/** *  QR code coding  * @param contents * @param width * @param height * @param imgPath */
	public static void encode2(String contents, int width, int height, String imgPath) {
    
		Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>();
		//  Specify error correction level 
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);
		//  Specify the encoding format 
		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();
		}
	}

	/** *  QR code decoding  * @param imgPath * @return String */
	public static String decode2(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<DecodeHintType, Object> hints = new Hashtable<DecodeHintType, Object>();
			hints.put(DecodeHintType.CHARACTER_SET, "GBK");

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

	/** *  test  * @param args */
	public static void main(String[] args) {
    

		//  Bar code 
		String imgPath = "target\\tiaoxm.png"; // Barcode path 
		String contents = "66666666";
		int width = 105, height = 50;
		
		ZxingHandler.encode(contents, width, height, imgPath);
		System.out.println("finished zxing EAN-13 encode.");

		String decodeContent = ZxingHandler.decode(imgPath);
		System.out.println(" The decoding is as follows ：" + decodeContent);
		System.out.println("finished zxing EAN-13 decode.");
		
		//  QR code 
		String imgPath2 = "target\\erwm.png";  // QR code path 
		String contents2 = "Hello, world!"
				+ "\nBlog [ http:/www.baidu.com ]"
				+ "\nEMail [ [email protected] ]";
		int width2 = 300, height2 = 300;

		ZxingHandler.encode2(contents2, width2, height2, imgPath2);
		System.out.println("finished zxing encode.");

		String decodeContent2 = ZxingHandler.decode2(imgPath2);
		System.out.println(" The decoding is as follows ：" + decodeContent2);
		System.out.println("finished zxing decode.");
		
	}
    
}