使用 zxing生成二维码

生成二维码

package com.lin.qrcode;

import java.io.File;
import java.io.IOException;
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;

//生成二维码
public class PracticeQRCode {

	public static void main(String[] args) throws WriterException, IOException {
		int width=300;
		int height=300;
		String format="png";
		String contents="http://blog.youkuaiyun.com/ljh_learn_from_base";//也可以写中文
		//定义二维码参数
		
		HashMap<EncodeHintType,Object> hints=new HashMap<>();
		hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M);
		hints.put(EncodeHintType.MARGIN, 2);
		
		BitMatrix bitMatrix=new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);
		File file=new File("D://QR_test."+format);
		if (!file.exists()) {
			file.createNewFile();
		}
		MatrixToImageWriter.writeToFile(bitMatrix, format,file);
	}

}

解析生成的二维码：

package com.lin.qrcode;

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.BinaryBitmap;
import com.google.zxing.DecodeHintType;
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 ReadQRCode {

	public static void main(String[] args) throws IOException, NotFoundException {
		MultiFormatReader formatReader=new MultiFormatReader();
		File file=new File("D://QR_test.png");
		BufferedImage bufferedImage=ImageIO.read(file);
		BinaryBitmap binaryBitmap=new BinaryBitmap(new HybridBinarizer(new BufferedImageLuminanceSource(bufferedImage)));
		Map<DecodeHintType,String> hints=new HashMap<>();
		hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");
		Result result=formatReader.decode(binaryBitmap, hints);
		System.out.println("解析结果："+result.toString());
		System.out.println("二维码的格式类型："+result.getBarcodeFormat());
		System.out.println("二维码的文本内容是："+result.getText());
	}

}

生成的二维码如下：