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@@ -0,0 +1,214 @@
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+package com.bofeng.unit;
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+
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+import com.baomidou.mybatisplus.toolkit.IdWorker;
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+import com.google.common.base.Strings;
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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 org.apache.commons.codec.binary.Base64;
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+
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+import javax.imageio.ImageIO;
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+import java.awt.*;
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+import java.awt.image.BufferedImage;
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+import java.io.ByteArrayOutputStream;
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+import java.io.File;
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+import java.io.IOException;
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+import java.nio.file.Files;
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+import java.nio.file.Paths;
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+import java.nio.file.StandardOpenOption;
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+import java.text.SimpleDateFormat;
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+import java.util.Date;
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+import java.util.HashMap;
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+import java.util.Map;
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+
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+public class QRCode {
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+
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+ private static String programUploadPath = "D:\\uoplad\\whepi";
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+
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+ /**
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+ * CODE_WIDTH：二维码宽度，单位像素
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+ * CODE_HEIGHT：二维码高度，单位像素
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+ * FRONT_COLOR：二维码前景色，0x000000 表示黑色
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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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+ */
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+ private static final int CODE_WIDTH = 256;
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+ private static final int CODE_HEIGHT = 256;
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+ private static final int FRONT_COLOR = 0x000000;
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+ private static final int BACKGROUND_COLOR = 0xFFFFFF;
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+
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+ public static BufferedImage createQRCode(String content, BufferedImage bufferedImage, int topFontWidth, int topFontHeight, int bottomFontWidth, int bottomFontHeight) throws WriterException {
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+ //检验参数
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+ if (content == null || "".equals(content)) {
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+ return null;
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+ }
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+ if (bufferedImage == null) {
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+ return null;
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+ }
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+ content = content.trim();
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+ int width = bufferedImage.getWidth();
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+ int height = bufferedImage.getHeight();
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+ int startBottomY = height + topFontHeight;
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+ height = startBottomY + bottomFontHeight;
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+ /**com.google.zxing.EncodeHintType：编码提示类型,枚举类型
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+ * EncodeHintType.CHARACTER_SET：设置字符编码类型
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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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+ * 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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+ * */
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+ Map<EncodeHintType, Object> hints = new HashMap();
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+ hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
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+ hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.Q);
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+ hints.put(EncodeHintType.MARGIN, 1);
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+
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+ /**
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+ * MultiFormatWriter:多格式写入，这是一个工厂类，里面重载了两个 encode 方法，用于写入条形码或二维码
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+ * encode(String contents,BarcodeFormat format,int width, int height,Map<EncodeHintType,?> hints)
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+ * contents:条形码/二维码内容
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+ * format：编码类型，如 条形码，二维码 等
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+ * width：码的宽度
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+ * height：码的高度
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+ * hints：码内容的编码类型
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+ * BarcodeFormat：枚举该程序包已知的条形码格式，即创建何种码，如 1 维的条形码，2 维的二维码 等
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+ * BitMatrix：位(比特)矩阵或叫2D矩阵，也就是需要的二维码
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+ */
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+ MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
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+ BitMatrix bitMatrix = multiFormatWriter.encode(content, BarcodeFormat.QR_CODE, width, height, hints);
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+
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+ /**java.awt.image.BufferedImage：具有图像数据的可访问缓冲图像，实现了 RenderedImage 接口
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+ * BitMatrix 的 get(int x, int y) 获取比特矩阵内容，指定位置有值，则返回true，将其设置为前景色，否则设置为背景色
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+ * BufferedImage 的 setRGB(int x, int y, int rgb) 方法设置图像像素
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+ * x：像素位置的横坐标，即列
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+ * y：像素位置的纵坐标，即行
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+ * rgb：像素的值，采用 16 进制,如 0xFFFFFF 白色
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+ */
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+ BufferedImage newBufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_BGR);
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+ for (int x = 0; x < width; x++) {
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+ for (int y = 0; y < height; y++) {
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+ //顶部文字填充区域设置为空白
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+ if (y <= topFontHeight) {
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+ newBufferedImage.setRGB(x, y, BACKGROUND_COLOR);
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+ }
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+ //底部文字填充区域设置为空白
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+ else if (y > startBottomY) {
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+ newBufferedImage.setRGB(x, y, BACKGROUND_COLOR);
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+ } else {
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+ newBufferedImage.setRGB(x, y, bitMatrix.get(x, y) ? FRONT_COLOR : BACKGROUND_COLOR);
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+ }
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+ }
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+ }
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+ bufferedImage = null; //主动释放
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+ return newBufferedImage;
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+ }
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+
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+ public static String createBase64Img(String content, String topFont, String bottomFont) throws WriterException, IOException {
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+ BufferedImage bufferedImage = new BufferedImage(CODE_WIDTH, CODE_HEIGHT, BufferedImage.TYPE_INT_RGB);
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+ if (content == null || "".equals(content)) {
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+ return null;
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+ }
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+ topFont = topFont == null ? "" : topFont;
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+ bottomFont = bottomFont == null ? "" : bottomFont;
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+ bufferedImage = pressTextInImage(bufferedImage, content, topFont, bottomFont);
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+ ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
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+ //写入流中
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+ ImageIO.write(bufferedImage, "jpg", outputStream);
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+ //转换成字节
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+ byte[] bytes = outputStream.toByteArray();
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+ //对字节数组Base64编码 -- 转换成base64串
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+ /* BASE64Encoder encoder = new BASE64Encoder();
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+ String base64Img = encoder.encodeBuffer(bytes).trim();*/
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+ Base64 encoder = new Base64();
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+ String base64Img = encoder.encodeToString(bytes);
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+
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+ //删除 \r\n
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+ base64Img = base64Img.replaceAll("\n", "").replaceAll("\r", "");
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+ //前面加 data:image/jpg;base64,
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+ String res = "data:image/jpg;base64," + base64Img.toString();
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+ //关闭流
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+ if (outputStream != null) {
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+ outputStream.close();
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+ }
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+// System.out.println(res);
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+ return decryptByBase64(res);
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+ }
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+
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+ public static BufferedImage pressTextInImage(BufferedImage bufferedImage, String content, String topFont, String bottomFont) throws WriterException {
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+ if (bufferedImage == null) {
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+ return null;
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+ }
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+ //图片绘制对象 Color.RED
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+ Graphics graphics = bufferedImage.createGraphics();
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+ Font font = new Font("黑体", 5, 18);
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+ FontMetrics metrics = graphics.getFontMetrics(font);
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+ //获取底部字体的宽和高
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+ int bottomFontWidth = metrics.stringWidth(bottomFont);
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+ int bottomFontHeight = metrics.getHeight();
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+ //获取顶部字体的宽和高
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+ int topFontWidth = metrics.stringWidth(topFont);
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+ int topFontHeight = metrics.getHeight();
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+ //将image生成二维码图片对象
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+ bufferedImage = createQRCode(content, bufferedImage, topFontWidth, topFontHeight, bottomFontWidth, bottomFontHeight);
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+ //获取二维码图片的宽和高
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+ int imageW = bufferedImage.getWidth();
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+ int imageH = bufferedImage.getHeight();
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+ //计算顶部文字填充位置
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+ int topStartX = (imageW - topFontWidth) / 2; //居中显示
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+ int topStartY = topFontHeight;
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+ //计算底部文字填充位置
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+ int bottomStartX = (imageW - bottomFontWidth) / 2; //居中显示
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+ int bottomStartY = (imageH - bottomFontHeight) + 2;
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+
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+ //文字图片对象
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+ BufferedImage textImag = new BufferedImage(imageW, imageH, BufferedImage.TYPE_INT_RGB);
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+ Graphics textGraphics = textImag.createGraphics();
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+ //画图
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+ textGraphics.drawImage(bufferedImage, 0, 0, imageW, imageH, null);
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+ // 写底部文字
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+ textGraphics.setColor(Color.RED);
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+ textGraphics.setFont(font);
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+ textGraphics.drawString(bottomFont, bottomStartX, bottomStartY);
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+ //写顶部字体
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+ textGraphics.setColor(Color.RED);
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+ textGraphics.setFont(font);
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+ textGraphics.drawString(topFont, topStartX, topStartY);
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+ graphics.dispose();
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+ return textImag;
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+ }
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+
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+ /**
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+ * base64转存文件
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+ * @param base64
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+ * @return
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+ */
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+ public static String decryptByBase64(String base64) {
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+ SimpleDateFormat sdf = new SimpleDateFormat("/yyyy/MM/dd");
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+ if (Strings.isNullOrEmpty(base64)) {
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+ return "";
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+ }
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+ String filePath = programUploadPath + sdf.format(new Date()) + "/" + IdWorker.getId() + ".jpg";
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+ File path = new File(programUploadPath + sdf.format(new Date()));
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+ if (!path.exists()) {
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+ path.mkdirs();
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+ }
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+ try {
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+ Files.write(Paths.get(filePath),
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+ Base64.decodeBase64(base64.substring(base64.indexOf(",") + 1)), StandardOpenOption.CREATE);
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+ } catch (IOException e) {
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+ e.printStackTrace();
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+ }
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+ return filePath.replace(programUploadPath, "");
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+ }
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+
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+ public static void main(String[] args) throws IOException, WriterException {
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+ Long startTime = System.currentTimeMillis();
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+ System.out.println("******************************");
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+ String file = createBase64Img("https://open.weixin.qq.com/connect/oauth2/authorize?appid=wx02a4ee296708dfd4&redirect_uri=http%3A%2F%2Fpeiguo.ng.yvanui.com%2Fuser%2FscanEstate.html&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect", "家园互助平台", "巡检扫码");
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+ Long endTime = System.currentTimeMillis();
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+ System.out.println(file);
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+ System.out.println((endTime - startTime) + " |" +(endTime - startTime)/ 1000);
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+ }
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+}
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peiguo