java中二維碼的生成與解析

pom文件

<!-- https://mvnrepository.com/artifact/com.google.zxing/core -->
		<dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.3.0</version>
        </dependency>

jar包

javase-2.0jar包下載

package com.mwk;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;

/**
 * 二維碼解析與生成工具類
 * @author 閔渭凱
 * 2018年5月11日
 */
public class QRCodeUtil {

	// 二維碼顏色
	private static final int BLACK = 0xFF000000;
	// 二維碼顏色
	private static final int WHITE = 0xFFFFFFFF;

	/**
	 * <span style="font-size:18px;font-weight:blod;">ZXing 方式生成二維碼</span>
	 * 
	 * @param text
	 *            <a href="javascript:void();">二維碼內容</a>
	 * @param width
	 *            二維碼寬
	 * @param height
	 *            二維碼高
	 * @param outPutPath
	 *            二維碼生成保存路徑
	 * @param imageType
	 *            二維碼生成格式
	 */
	public static void QRCodeCreate(String text, int width, int height, String outPutPath, String imageType) {
		Map<EncodeHintType, String> his = new HashMap<EncodeHintType, String>();
		// 設置編碼字符集
		his.put(EncodeHintType.CHARACTER_SET, "utf-8");
		try {
			// 1、生成二維碼
			BitMatrix encode = new MultiFormatWriter().encode(text, BarcodeFormat.QR_CODE, width, height, his);

			// 2、獲取二維碼寬高
			int codeWidth = encode.getWidth();
			int codeHeight = encode.getHeight();

			// 3、將二維碼放入緩衝流
			BufferedImage image = new BufferedImage(codeWidth, codeHeight, BufferedImage.TYPE_INT_RGB);
			for (int i = 0; i < codeWidth; i++) {
				for (int j = 0; j < codeHeight; j++) {
					// 4、循環將二維碼內容定入圖片
					image.setRGB(i, j, encode.get(i, j) ? BLACK : WHITE);
				}
			}
			File outPutImage = new File(outPutPath);
			// 如果圖片不存在創建圖片
			if (!outPutImage.exists())
				outPutImage.createNewFile();
			// 5、將二維碼寫入圖片
			ImageIO.write(image, imageType, outPutImage);
		} catch (WriterException e) {
			e.printStackTrace();
			System.out.println("二維碼生成失敗");
		} catch (IOException e) {
			e.printStackTrace();
			System.out.println("生成二維碼圖片失敗");
		}
	}

	/**
	 * 根據文件路徑解析讀取二維碼圖片信息
	 * @param QRCodePath 
	 * @return
	 */
	@SuppressWarnings("unchecked")
	public static String QRCodeRead(String QRCodePath) {
		Result result=null;
		try {
			MultiFormatReader formatReader = new MultiFormatReader();
			// 二維碼圖片位置
			File file = new File(QRCodePath);
			// 讀取圖片
			BufferedImage image = ImageIO.read(file);
			BinaryBitmap binaryBitmap= new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(image)));
			// 定義二維碼的參數
			@SuppressWarnings("rawtypes")
			HashMap hints = new HashMap();
			// 設置編碼字符集
			hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
			// 處理讀取結果
			result = formatReader.decode(binaryBitmap, hints);
		} catch (NotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return result.getText();
	}
	
	//測試
	public static void main(String[] args) {
		QRCodeUtil.QRCodeCreate("1111", 300, 300, "E://mwk.jpg", "jpg");
		
		System.out.println(QRCodeUtil.QRCodeRead("E://mwk.jpg"));
	}

}