content: package com.jeespring.common.utils;
  
  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;
  
  /**
   * 条形码和二维码编码解码
   * 
   * @author ThinkGem
   * @version 2014-02-28
   */
  public class ZxingHandler {
  
  	/**
  	 * 条形码编码
  	 * 
  	 * @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();
  		}
  	}
  
  	/**
  	 * 条形码解码
  	 * 
  	 * @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;
  	}
  	
  	/**
  	 * 二维码编码
  	 * 
  	 * @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>();
  		// 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();
  		}
  	}
  
  	/**
  	 * 二维码解码
  	 * 
  	 * @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;
  	}
  
  	/**
  	 * @param args
  	 */
  	public static void main(String[] args) {
  
  		// 条形码
  		String imgPath = "target\\zxing_EAN13.png";
  		String contents = "6923450657713";
  		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("解码内容如下：" + decodeContent);
  		System.out.println("finished zxing EAN-13 decode.");
  		
  		// 二维码
  		String imgPath2 = "target\\zxing.png";
  		String contents2 = "Hello Gem, welcome to Zxing!"
  				+ "\nBlog [ http://thinkgem.iteye.com ]"
  				+ "\nEMail [ thinkgem@163.com ]";
  		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("解码内容如下：" + decodeContent2);
  		System.out.println("finished zxing decode.");
  		
  	}
      
  }