二维码

1.Maven引入barcode4j依赖

<!-- 条形码生成 --><dependency><groupId>net.sf.barcode4j</groupId><artifactId>barcode4j</artifactId><version>2.1</version></dependency>
<!-- https://mvnrepository.com/artifact/org.apache.avalon.framework/avalon-framework-api --><dependency><groupId>org.apache.avalon.framework</groupId><artifactId>avalon-framework-api</artifactId><version>4.3.1</version></dependency>

2.工具类

package com.wulianwang.manage.utils.util;import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.configuration.DefaultConfiguration;
import org.apache.commons.io.FileUtils;
import org.krysalis.barcode4j.BarcodeException;
import org.krysalis.barcode4j.BarcodeGenerator;
import org.krysalis.barcode4j.BarcodeUtil;
import org.krysalis.barcode4j.HumanReadablePlacement;
import org.krysalis.barcode4j.impl.code128.Code128Bean;
import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;import java.awt.image.BufferedImage;
import java.io.*;/*** 条形码工具类*/
public class BarCodeUtils {/**************************** 条形码  ********************************/
/*** 生成code128条形码** @param message       要生成的文本* @param withQuietZone 是否两边留白* @param hideText      隐藏可读文本* @param filePath      文件生成的路径*/public static void generateBarCode128(String message, boolean withQuietZone, boolean hideText, String filePath) {Code128Bean bean = new Code128Bean();// 分辨率int dpi = 512;// 设置两侧是否留白bean.doQuietZone(withQuietZone);// 设置条形码高度和宽度(不填就是默认的)
//        bean.setBarHeight((double) ObjectUtils.defaultIfNull(height, 9.0D));
//        if (width != null) {
//            bean.setModuleWidth(width);
//        }// 设置文本位置（包括是否显示）if (hideText) {bean.setMsgPosition(HumanReadablePlacement.HRP_NONE);}// 设置图片类型String format = "image/png";
ByteArrayOutputStream ous = new ByteArrayOutputStream();BitmapCanvasProvider canvas = new BitmapCanvasProvider(ous, format, dpi,BufferedImage.TYPE_BYTE_BINARY, false, 0);// 生产条形码bean.generateBarcode(canvas, message);
try {canvas.finish();//字节码byte[] bytes = ous.toByteArray();FileUtils.writeByteArrayToFile(new File(filePath), bytes);} catch (IOException e) {e.printStackTrace();}}/**************************** 二维码  ********************************//*** 生成二维码* @param message       要生成的文本* @param filePath      文件生成的路径*/public static void genQRCode(String message, String filePath){try {BarcodeUtil util = BarcodeUtil.getInstance();DefaultConfiguration cfg = new DefaultConfiguration("barcode");// Bar code typeDefaultConfiguration child = new DefaultConfiguration("datamatrix");cfg.addChild(child);// Human readable text positionDefaultConfiguration attr = new DefaultConfiguration("human-readable");
//        //设置高度(无效果)
//        attr = new DefaultConfiguration("height");
//        attr.setValue(50);
//        child.addChild(attr);//设置二维码宽度attr = new DefaultConfiguration("module-width");attr.setValue("2.0");child.addChild(attr);BarcodeGenerator gen = util.createBarcodeGenerator(cfg);//分辨率int resolution = 300;// 设置图片类型String format = "image/png";ByteArrayOutputStream ous = new ByteArrayOutputStream();BitmapCanvasProvider canvas = new BitmapCanvasProvider(ous, format, resolution,BufferedImage.TYPE_BYTE_BINARY, false, 0);gen.generateBarcode(canvas, message);canvas.finish();//字节码byte[] bytes = ous.toByteArray();FileUtils.writeByteArrayToFile(new File(filePath), bytes);} catch (ConfigurationException e) {e.printStackTrace();} catch (BarcodeException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}
}

3.调用工具类测试一下

  @org.junit.Testpublic void test1() throws IOException {BarCodeUtils.generateBarCode128("V000001", true, false,"./bbb.jpg");}

4.生成条形码图片

二维码

生成带logo的二维码

import java.util.Objects;import javax.imageio.ImageIO;
import org.apache.commons.lang3.StringUtils;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/*** 画制定logo和制定描述的二维码依赖<dependency><groupId>com.google.zxing</groupId><artifactId>core</artifactId><version>3.2.1</version></dependency>
<dependency><groupId>com.google.zxing</groupId><artifactId>javase</artifactId><version>3.2.1</version></dependency>*/public class QrCodeUtil {private static final int QRCOLOR = 0xFF000000; // 默认是黑色private static final int BGWHITE = 0xFFFFFFFF; // 背景颜色private static final int WIDTH = 400; // 二维码宽private static final int HEIGHT = 400; // 二维码高// 用于设置QR二维码参数private static Map<EncodeHintType, Object> hints = new HashMap<EncodeHintType, Object>() {private static final long serialVersionUID = 1L;{put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);// 设置QR二维码的纠错级别（H为最高级别）具体级别信息put(EncodeHintType.CHARACTER_SET, "utf-8");// 设置编码方式put(EncodeHintType.MARGIN, 0);}};public static void main(String[] args) throws WriterException {File logoFile = new File("D://QrCode/logo3.png");File QrCodeFile = new File("D://QrCode/05.png");String url = "http://ganyintao.top/";String note = "在下老甘";drawLogoQRCode(logoFile, QrCodeFile, url, note);}// 生成带logo的二维码图片public static void drawLogoQRCode(File logoFile, File codeFile, String qrUrl, String note) {try {MultiFormatWriter multiFormatWriter = new MultiFormatWriter();// 参数顺序分别为：编码内容，编码类型，生成图片宽度，生成图片高度，设置参数BitMatrix bm = multiFormatWriter.encode(qrUrl, BarcodeFormat.QR_CODE, WIDTH, HEIGHT, hints);BufferedImage image = new BufferedImage(WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);// 开始利用二维码数据创建Bitmap图片，分别设为黑（0xFFFFFFFF）白（0xFF000000）两色for (int x = 0; x < WIDTH; x++) {for (int y = 0; y < HEIGHT; y++) {image.setRGB(x, y, bm.get(x, y) ? QRCOLOR : BGWHITE);}}int width = image.getWidth();int height = image.getHeight();if (Objects.nonNull(logoFile) && logoFile.exists()) {// 构建绘图对象Graphics2D g = image.createGraphics();// 读取Logo图片BufferedImage logo = ImageIO.read(logoFile);// 开始绘制logo图片g.drawImage(logo, width * 2 / 5, height * 2 / 5, width * 2 / 10, height * 2 / 10, null);g.dispose();logo.flush();}// 自定义文本描述if (StringUtils.isNotEmpty(note)) {// 新的图片，把带logo的二维码下面加上文字BufferedImage outImage = new BufferedImage(400, 445, BufferedImage.TYPE_4BYTE_ABGR);Graphics2D outg = outImage.createGraphics();// 画二维码到新的面板outg.drawImage(image, 0, 0, image.getWidth(), image.getHeight(), null);// 画文字到新的面板outg.setColor(Color.BLACK);outg.setFont(new Font("楷体", Font.BOLD, 30)); // 字体、字型、字号int strWidth = outg.getFontMetrics().stringWidth(note);if (strWidth > 399) {// //长度过长就截取前面部分// 长度过长就换行String note1 = note.substring(0, note.length() / 2);String note2 = note.substring(note.length() / 2, note.length());int strWidth1 = outg.getFontMetrics().stringWidth(note1);int strWidth2 = outg.getFontMetrics().stringWidth(note2);outg.drawString(note1, 200 - strWidth1 / 2, height + (outImage.getHeight() - height) / 2 + 12);BufferedImage outImage2 = new BufferedImage(400, 485, BufferedImage.TYPE_4BYTE_ABGR);Graphics2D outg2 = outImage2.createGraphics();outg2.drawImage(outImage, 0, 0, outImage.getWidth(), outImage.getHeight(), null);outg2.setColor(Color.BLACK);outg2.setFont(new Font("宋体", Font.BOLD, 30)); // 字体、字型、字号outg2.drawString(note2, 200 - strWidth2 / 2, outImage.getHeight() + (outImage2.getHeight() - outImage.getHeight()) / 2 + 5);outg2.dispose();outImage2.flush();outImage = outImage2;} else {outg.drawString(note, 200 - strWidth / 2, height + (outImage.getHeight() - height) / 2 + 12); // 画文字}outg.dispose();outImage.flush();image = outImage;}image.flush();ImageIO.write(image, "png", codeFile); // TODO} catch (Exception e) {e.printStackTrace();}}}

验证码

1.工具

public class ImageVerificationCode {private int weight = 100;           //验证码图片的长和宽private int height = 40;private String text;                //用来保存验证码的文本内容private Random r = new Random();    //获取随机数对象//private String[] fontNames = {"宋体", "华文楷体", "黑体", "微软雅黑", "楷体_GB2312"};   //字体数组//字体数组private String[] fontNames = {"Georgia"};//验证码数组private String codes = "23456789abcdefghjkmnopqrstuvwxyzABCDEFGHJKMNPQRSTUVWXYZ";/*** 获取随机的颜色** @return*/private Color randomColor() {int r = this.r.nextInt(225);  //这里为什么是225，因为当r，g，b都为255时，即为白色，为了好辨认，需要颜色深一点。int g = this.r.nextInt(225);int b = this.r.nextInt(225);return new Color(r, g, b);            //返回一个随机颜色}/*** 获取随机字体** @return*/private Font randomFont() {int index = r.nextInt(fontNames.length);  //获取随机的字体String fontName = fontNames[index];int style = r.nextInt(4);         //随机获取字体的样式，0是无样式，1是加粗，2是斜体，3是加粗加斜体int size = r.nextInt(10) + 24;    //随机获取字体的大小return new Font(fontName, style, size);   //返回一个随机的字体}/*** 获取随机字符** @return*/private char randomChar() {int index = r.nextInt(codes.length());return codes.charAt(index);}/*** 画干扰线，验证码干扰线用来防止计算机解析图片** @param image*/private void drawLine(BufferedImage image) {int num = r.nextInt(10); //定义干扰线的数量Graphics2D g = (Graphics2D) image.getGraphics();for (int i = 0; i < num; i++) {int x1 = r.nextInt(weight);int y1 = r.nextInt(height);int x2 = r.nextInt(weight);int y2 = r.nextInt(height);g.setColor(randomColor());g.drawLine(x1, y1, x2, y2);}}/*** 创建图片的方法** @return*/private BufferedImage createImage() {//创建图片缓冲区BufferedImage image = new BufferedImage(weight, height, BufferedImage.TYPE_INT_RGB);//获取画笔Graphics2D g = (Graphics2D) image.getGraphics();//设置背景色随机g.setColor(Color.white);g.fillRect(0, 0, weight, height);//返回一个图片return image;}/*** 获取验证码图片的方法** @return*/public BufferedImage getImage() {BufferedImage image = createImage();Graphics2D g = (Graphics2D) image.getGraphics(); //获取画笔StringBuilder sb = new StringBuilder();for (int i = 0; i < 4; i++)             //画四个字符即可{String s = randomChar() + "";      //随机生成字符，因为只有画字符串的方法，没有画字符的方法，所以需要将字符变成字符串再画sb.append(s);                      //添加到StringBuilder里面float x = i * 1.0F * weight / 4;   //定义字符的x坐标g.setFont(randomFont());           //设置字体，随机g.setColor(randomColor());         //设置颜色，随机g.drawString(s, x, height - 5);}this.text = sb.toString();drawLine(image);return image;}/*** 获取验证码文本的方法** @return*/public String getText() {return text;}public static void output(BufferedImage image, OutputStream out) throws IOException                  //将验证码图片写出的方法{ImageIO.write(image, "JPEG", out);}
}

2、controller接口

    @GetMapping("/getCode")public ResResult<Map<String,String>> getCode(HttpServletRequest request) throws IOException {/*1.生成验证码2.把验证码上的文本存在session中3.把验证码图片发送给客户端*/ImageVerificationCode ivc = new ImageVerificationCode();     //用我们的验证码类，生成验证码类对象BufferedImage image = ivc.getImage();  //获取验证码request.getSession().setAttribute("text", ivc.getText());ByteArrayOutputStream stream = new ByteArrayOutputStream();ImageIO.write(image, "png", stream);String base64 = Base64.encode(stream.toByteArray());//将验证码的文本存在session中Map<String,String> map = new HashMap<>();map.put("sessionId",request.getSession().getId());map.put("text",base64);redisUtils.set(request.getSession().getId(),ivc.getText(),60);return new ResResult<>(map);//将验证码图片响应给客户端}

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JAVA使用barcode4j生成条形码和二维码图片以及带logo的二维码，验证码图片

二维码

验证码

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