com.github.ibole.infrastructure.common.utils.ZxingHandler Maven / Gradle / Ivy

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package com.github.ibole.infrastructure.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.
 * 
 */
public class ZxingHandler {

  /**
   * 条形码编码.
   * 
   * @param contents String
   * @param width int
   * @param height int
   * @param imgPath String
   */
  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 String
   * @return decoded string 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 String
   * @param width int
   * @param height int
   * @param imgPath String
   */
  public static void encode2(String contents, int width, int height, String imgPath) {
    Hashtable hints = new Hashtable();
    // 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 String
   * @return decoded string 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 hints = new Hashtable();
      hints.put(DecodeHintType.CHARACTER_SET, "GBK");

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

  /**
   * main.
   * @param args 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://xxx.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("解码内容如下：" + decodeContent2);
    System.out.println("finished zxing decode.");

  }

}