6 changed files with 248 additions and 5 deletions
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package org.springblade.common.utils; |
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import com.google.zxing.BarcodeFormat; |
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import com.google.zxing.EncodeHintType; |
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import com.google.zxing.MultiFormatWriter; |
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import com.google.zxing.WriterException; |
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import com.google.zxing.common.BitMatrix; |
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import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel; |
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import lombok.extern.slf4j.Slf4j; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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import org.springblade.common.constant.CommonConstant; |
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import org.springframework.util.StringUtils; |
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import sun.misc.BASE64Encoder; |
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import javax.imageio.ImageIO; |
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import javax.servlet.http.HttpServletResponse; |
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import javax.swing.filechooser.FileSystemView; |
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import java.awt.image.BufferedImage; |
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import java.io.File; |
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import java.io.FileInputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.util.HashMap; |
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import java.util.Map; |
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import java.util.UUID; |
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/** |
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* 二维码工具 |
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* @Author:debug (SteadyJack) |
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* @Link: weixin-> debug0868 qq-> 1948831260 |
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* @Date: 2020/11/16 22:38 |
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* |
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**/ |
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public class QRCodeUtil { |
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private static final Logger log= LoggerFactory.getLogger(QRCodeUtil.class); |
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//CODE_WIDTH：二维码宽度，单位像素
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private static final int CODE_WIDTH = 100; |
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//CODE_HEIGHT：二维码高度，单位像素
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private static final int CODE_HEIGHT = 100; |
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//FRONT_COLOR：二维码前景色，0x000000 表示黑色
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private static final int FRONT_COLOR = 0x000000; |
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//BACKGROUND_COLOR：二维码背景色，0xFFFFFF 表示白色
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//演示用 16 进制表示，和前端页面 CSS 的取色是一样的，注意前后景颜色应该对比明显，如常见的黑白
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private static final int BACKGROUND_COLOR = 0xFFFFFF; |
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//默认生成二维码格式
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private static final String FileFormat="png"; |
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private static final String path="qrCodeImg"; |
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/** |
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* 文件转换base64 |
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* @param filePath |
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* @return |
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*/ |
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public static String getEmpAutograph(String filePath) { |
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log.info("文件转换base64... {}",filePath); |
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String img = null; |
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if (filePath!=null && !"".equals(filePath)) { |
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InputStream in = null; |
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byte[] picdata = null; |
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try { |
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in = new FileInputStream(filePath); |
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picdata = new byte[in.available()]; |
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in.read(picdata); |
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BASE64Encoder encoder = new BASE64Encoder(); |
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img = encoder.encode(picdata); |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} finally { |
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try { |
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in.close(); |
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} catch (IOException e) { |
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e.printStackTrace(); |
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} |
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} |
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} |
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return "data:image/png;base64," + img; |
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} |
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public static String createCodeToFile(String content) { |
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try { |
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log.info(">>>>>>>>>>>>>>>>>>>createCodeToFile",content); |
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String imgPath = CommonUtil.SYSTEMFILEPATH+"qrCodeImg/"; |
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File codeImgFileSaveDir = new File(imgPath); |
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//1. 使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
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String fileName = UUID.randomUUID() + "." +FileFormat; |
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content = content.trim(); |
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if (codeImgFileSaveDir.isFile()) { |
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//二维码图片存在目录为空，默认放在桌面...
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codeImgFileSaveDir = FileSystemView.getFileSystemView().getHomeDirectory(); |
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} |
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if (!codeImgFileSaveDir.exists()) { |
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//二维码图片存在目录不存在，开始创建...
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codeImgFileSaveDir.mkdirs(); |
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} |
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//核心代码-生成二维码
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BufferedImage bufferedImage = getBufferedImage(content); |
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File codeImgFile = new File(codeImgFileSaveDir, fileName); |
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ImageIO.write(bufferedImage, FileFormat, codeImgFile); |
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fileName = imgPath+fileName; |
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return fileName; |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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return null; |
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} |
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/** |
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* 条形码 |
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* @param content |
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* @return |
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*/ |
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public static String createCodeToFileType(String content) { |
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try { |
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//getResource("/")等同于到resource文件夹下
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String imgPath = CommonUtil.SYSTEMFILEPATH+"qrCodeImg/"; |
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File codeImgFileSaveDir = new File(imgPath); |
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//1. 使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
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String fileName = UUID.randomUUID() + "." +FileFormat; |
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content = content.trim(); |
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if (codeImgFileSaveDir==null || codeImgFileSaveDir.isFile()) { |
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//二维码图片存在目录为空，默认放在桌面...
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codeImgFileSaveDir = FileSystemView.getFileSystemView().getHomeDirectory(); |
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} |
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if (!codeImgFileSaveDir.exists()) { |
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//二维码图片存在目录不存在，开始创建...
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codeImgFileSaveDir.mkdirs(); |
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} |
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//核心代码-生成二维码
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BufferedImage bufferedImage = getBufferedImageMatrix(content); |
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File codeImgFile = new File(codeImgFileSaveDir, fileName); |
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ImageIO.write(bufferedImage, FileFormat, codeImgFile); |
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fileName = imgPath+fileName; |
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return fileName; |
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} catch (Exception e) { |
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e.printStackTrace(); |
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} |
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return null; |
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} |
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/** |
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* 生成二维码并输出到输出流, 通常用于输出到网页上进行显示，输出到网页与输出到磁盘上的文件中，区别在于最后一句 ImageIO.write |
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* write(RenderedImage im,String formatName,File output)：写到文件中 |
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* write(RenderedImage im,String formatName,OutputStream output)：输出到输出流中 |
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* @param content ：二维码内容 |
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*/ |
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// OutputStream outputStream,
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public static void createCodeToOutputStream(String content, HttpServletResponse response) throws WriterException, IOException { |
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if (content!=null && !"".equals(content)) { |
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return; |
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} |
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content = content.trim(); |
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//核心代码-生成二维码
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BufferedImage bufferedImage = getBufferedImage(content); |
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//区别就是这一句，输出到输出流中，如果第三个参数是 File，则输出到文件中
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ImageIO.write(bufferedImage, FileFormat,response.getOutputStream()); |
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log.info("二维码图片生成到输出流成功..."); |
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} |
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//核心代码-生成二维码
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public static BufferedImage getBufferedImage(String content) throws WriterException { |
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//com.google.zxing.EncodeHintType：编码提示类型,枚举类型
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Map<EncodeHintType, Object> hints = new HashMap(); |
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//EncodeHintType.CHARACTER_SET：设置字符编码类型
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hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); |
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//EncodeHintType.ERROR_CORRECTION：设置误差校正
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//ErrorCorrectionLevel：误差校正等级，L = ~7% correction、M = ~15% correction、Q = ~25% correction、H = ~30% correction
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//不设置时，默认为 L 等级，等级不一样，生成的图案不同，但扫描的结果是一样的
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.M); |
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//EncodeHintType.MARGIN：设置二维码边距，单位像素，值越小，二维码距离四周越近
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hints.put(EncodeHintType.MARGIN, 0); |
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MultiFormatWriter multiFormatWriter = new MultiFormatWriter(); |
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BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, CODE_WIDTH, CODE_HEIGHT, hints); |
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BufferedImage bufferedImage = new BufferedImage(CODE_WIDTH, CODE_HEIGHT, BufferedImage.TYPE_INT_BGR); |
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for (int x = 0; x < CODE_WIDTH; x++) { |
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for (int y = 0; y < CODE_HEIGHT; y++) { |
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bufferedImage.setRGB(x, y, bitMatrix.get(x, y) ? FRONT_COLOR : BACKGROUND_COLOR); |
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} |
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} |
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return bufferedImage; |
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} //核心代码-生成二维码
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public static BufferedImage getBufferedImageMatrix(String content) throws WriterException { |
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//com.google.zxing.EncodeHintType：编码提示类型,枚举类型
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Map<EncodeHintType, Object> hints = new HashMap(); |
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//EncodeHintType.CHARACTER_SET：设置字符编码类型
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hints.put(EncodeHintType.CHARACTER_SET, "UTF-8"); |
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//EncodeHintType.ERROR_CORRECTION：设置误差校正
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//ErrorCorrectionLevel：误差校正等级，L = ~7% correction、M = ~15% correction、Q = ~25% correction、H = ~30% correction
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//不设置时，默认为 L 等级，等级不一样，生成的图案不同，但扫描的结果是一样的
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hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H); |
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//EncodeHintType.MARGIN：设置二维码边距，单位像素，值越小，二维码距离四周越近
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hints.put(EncodeHintType.MARGIN, 1); |
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MultiFormatWriter multiFormatWriter = new MultiFormatWriter(); |
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BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.CODE_128, 240, 30, hints); |
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BufferedImage bufferedImage = new BufferedImage(240, 30, BufferedImage.TYPE_INT_BGR); |
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for (int x = 0; x < 240; x++) { |
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for (int y = 0; y < 30; y++) { |
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bufferedImage.setRGB(x, y, bitMatrix.get(x, y) ? FRONT_COLOR : BACKGROUND_COLOR); |
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} |
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} |
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return bufferedImage; |
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} |
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} |
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