JavaWeb 二维码

说明

相关包

zxing-core3.3
zxing-javase3.3
junit4.12

POM文件

<dependency>
	<groupId>com.google.zxing</groupId>
	<artifactId>core</artifactId>
	<version>3.3.0</version>
</dependency>
<dependency>
	<groupId>com.google.zxing</groupId>
	<artifactId>javase</artifactId>
	<version>3.3.0</version>
</dependency>
<dependency>
	<groupId>junit</groupId>
	<artifactId>junit</artifactId>
	<version>4.12</version>
</dependency>

相关代码

package com;

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.util.HashMap;
import java.util.Map;

import javax.imageio.ImageIO;

import org.junit.Test;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.Binarizer;
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.NotFoundException;
import com.google.zxing.Result;
import com.google.zxing.WriterException;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
import com.google.zxing.client.j2se.MatrixToImageConfig;
import com.google.zxing.client.j2se.MatrixToImageWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.oned.Code128Writer;

public class Demo {
	static class ImageFormat {
		static final String PNG = "png";
		static final String GIF = "gif";
		static final String BMP = "bmp";
		static final String JPEG = "jpeg";
	}

	@Test
	public void qrcodeBuildTest() {
		// 输出目录
		String outPath = "d:\\demo\\";
		// 输出文件名
		String outName = "zxingDemo.png";
		// 生成内容
		String contents = "Qrcode Demo";
		Demo.qrCodeBuild(contents, outPath, outName, ImageFormat.PNG, 200, 200);
	}

	@Test
	public void barCodeBuildTest() {
		// 输出目录
		String outPath = "d:\\demo\\";
		// 输出文件名
		String outName = "zxingDemo.png";
		// 生成内容
		String contents = "barCode Demo";
		Demo.barCodeBuild(contents, outPath, outName, ImageFormat.PNG, 180, 60);
	}

	@Test
	public void qrCodeParseTest() {
		// String content = Demo.qrcodeParse("d:\\demo\\zxingDemo.png");
		String content = Demo.qrcodeParse(
				"http://dl2.iteye.com/upload/attachment/0103/0259/f1c4cf6c-c825-3504-8c9e-97019e3796d1.png");
		System.out.println(null == content ? "解析失败" : content);
	}

	/**
	 * 二维码生成
	 *
	 * @param contents
	 *            文本内容
	 * @param outPath
	 *            输出目录
	 * @param outName
	 *            输出文件
	 * @param format
	 *            输出文件类型(png,jpeg...)
	 * @param width
	 *            生成图片宽度
	 * @param height
	 *            生成图片高度
	 */
	public static void qrCodeBuild(String contents, String outPath, String outName, String format, int width,
			int height) {
		try {
			// 输出目录检测
			if (!new File(outPath).exists()) {
				new File(outPath).mkdirs();
			}
			Path path = FileSystems.getDefault().getPath(outPath, outName);

			// 相关配置(编码、白边)
			Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>();
			hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
			hints.put(EncodeHintType.MARGIN, 1);

			// 生成
			BitMatrix matrix = new MultiFormatWriter().encode(contents, BarcodeFormat.QR_CODE, width, height, hints);

			// 输出二维码
			MatrixToImageConfig config = new MatrixToImageConfig(0xFF000000, 0xFFFFFFFF);
			MatrixToImageWriter.writeToPath(matrix, format, path, config);
			// 输出为文件流(Web项目)
			// OutputStream stream = response.getOutputStream();
			// MatrixToImageWriter.writeToStream(matrix, format, stream,config);

			System.out.println("调试输出:OK");
		} catch (WriterException | IOException e) {
			e.printStackTrace();
		}
	}

	/**
	 * 二维码解析
	 *
	 * @param inPath
	 *            二维码图片地址
	 * @return 二维码文本内容
	 */
	public static String qrcodeParse(String inPath) {

		// 文件检测
		if (!new File(inPath).exists()) {
			System.out.println("文件不存在:" + inPath);
			return null;
		}

		String content = "";
		try {

			// 读取图片
			BufferedImage image = ImageIO.read(new File(inPath));
			// 提取图片像素
			LuminanceSource source = new BufferedImageLuminanceSource(image);
			// 二值化(将灰度设置为0或255)
			Binarizer binarizer = new HybridBinarizer(source);
			// 转换为二进制图片
			BinaryBitmap binaryBitmap = new BinaryBitmap(binarizer);

			// 相关配置
			Map<DecodeHintType, Object> hints = new HashMap<DecodeHintType, Object>();
			hints.put(DecodeHintType.CHARACTER_SET, "UTF-8");

			// 解析
			Result result = new MultiFormatReader().decode(binaryBitmap, hints);// 对图像进行解码

			// 获取文本
			content = result.getText();

			// 输出条形码类型(我使用的二维码,所以会输出QR_CODE)
			System.out.println(result.getBarcodeFormat());

		} catch (IOException | NotFoundException e) {
			e.printStackTrace();
		}
		return content;
	}

	/***
	 * 一维码生成
	 *
	 * @param content
	 *            文本
	 * @param outPath
	 *            输出目录
	 * @param outName
	 *            输出文件名
	 * @param format
	 *            文件格式
	 * @param width
	 *            生成图片宽度
	 * @param height
	 *            生成图片高度
	 */
	public static void barCodeBuild(String content, String outPath, String outName, String format, int width,
			int height) {

		// 文件检测
		if (!new File(outPath).exists()) {
			new File(outPath).mkdirs();
		}
		Path path = FileSystems.getDefault().getPath(outPath, outName);

		try {
			Code128Writer writer = new Code128Writer();
			BitMatrix matrix = writer.encode(content, BarcodeFormat.CODE_128, width, height);
			MatrixToImageWriter.writeToPath(matrix, format, path);
			System.out.println("调试输出:OK");
		} catch (WriterException | IOException e) {
			e.printStackTrace();
		}
	}
}

可以参考这里和这里