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SpringBoot-登录验证码实现

SpringBoot

【SpringBoot-登录验证码实现】嗯，工具类记录
原链接：https://blog.csdn.net/qq_37651267/article/details/99305573，非常感谢原链接博主

SpringBoot-登录验证码实现

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SpringBoot-登录验证码实现

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此验证码的实现没有用到太多的插件，话不多说直接上代码，大家拿过去就可以用 。
1.验证码类
package com.youyou.login.util.validatecode;import lombok.Data;/** * 验证码类 */@Datapublic class VerifyCode {private String code;private byte[] imgBytes;private long expireTime;}
SpringBoot-登录验证码实现

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2.验证码生成接口
package com.youyou.login.util.validatecode;import JAVA.io.IOException;import java.io.OutputStream;/** * 验证码生成接口 */public interface IVerifyCodeGen {/*** 生成验证码并返回code，将图片写的os中** @param width* @param height* @param os* @return* @throws IOException*/String generate(int width, int height, OutputStream os) throws IOException;/*** 生成验证码对象** @param width* @param height* @return* @throws IOException*/VerifyCode generate(int width, int height) throws IOException;}
SpringBoot-登录验证码实现

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3.验证码生成实现类
package com.youyou.login.util.validatecode;import com.youyou.util.RandomUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import javax.imageio.ImageIO;import java.awt.*;import java.awt.image.BufferedImage;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.io.OutputStream;import java.util.Random;/** * 验证码实现类 */public class SimpleCharVerifyCodeGenImpl implements IVerifyCodeGen {private static final Logger logger = LoggerFactory.getLogger(SimpleCharVerifyCodeGenImpl.class);private static final String[] FONT_TYPES = { "\u5b8b\u4f53", "\u65b0\u5b8b\u4f53", "\u9ed1\u4f53", "\u6977\u4f53", "\u96b6\u4e66" };private static final int VALICATE_CODE_LENGTH = 4;/*** 设置背景颜色及大小，干扰线** @param graphics* @param width* @param height*/private static void fillBackground(Graphics graphics, int width, int height) {// 填充背景graphics.setColor(Color.WHITE);//设置矩形坐标x y 为0graphics.fillRect(0, 0, width, height);// 加入干扰线条for (int i = 0; i < 8; i++) {//设置随机颜色算法参数graphics.setColor(RandomUtils.randomColor(40, 150));Random random = new Random();int x = random.nextInt(width);int y = random.nextInt(height);int x1 = random.nextInt(width);int y1 = random.nextInt(height);graphics.drawLine(x, y, x1, y1);}}/*** 生成随机字符** @param width* @param height* @param os* @return* @throws IOException*/@Overridepublic String generate(int width, int height, OutputStream os) throws IOException {BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);Graphics graphics = image.getGraphics();fillBackground(graphics, width, height);String randomStr = RandomUtils.randomString(VALICATE_CODE_LENGTH);createCharacter(graphics, randomStr);graphics.dispose();//设置JPEG格式ImageIO.write(image, "JPEG", os);return randomStr;}/*** 验证码生成** @param width* @param height* @return*/@Overridepublic VerifyCode generate(int width, int height) {VerifyCode verifyCode = null;try (//将流的初始化放到这里就不需要手动关闭流ByteArrayOutputStream baos = new ByteArrayOutputStream();) {String code = generate(width, height, baos);verifyCode = new VerifyCode();verifyCode.setCode(code);verifyCode.setImgBytes(baos.toByteArray());} catch (IOException e) {logger.error(e.getMessage(), e);verifyCode = null;}return verifyCode;}/*** 设置字符颜色大小** @param g* @param randomStr*/private void createCharacter(Graphics g, String randomStr) {char[] charArray = randomStr.toCharArray();for (int i = 0; i < charArray.length; i++) {//设置RGB颜色算法参数g.setColor(new Color(50 + RandomUtils.nextInt(100),50 + RandomUtils.nextInt(100), 50 + RandomUtils.nextInt(100)));//设置字体大小，类型g.setFont(new Font(FONT_TYPES[RandomUtils.nextInt(FONT_TYPES.length)], Font.BOLD, 26));//设置x y 坐标g.drawString(String.valueOf(charArray[i]), 15 * i + 5, 19 + RandomUtils.nextInt(8));}}}
SpringBoot-登录验证码实现

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4.工具类
package com.youyou.util;import java.awt.*;import java.util.Random;public class RandomUtils extends org.Apache.commons.lang3.RandomUtils {private static final char[] CODE_SEQ = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J','K', 'L', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W','X', 'Y', 'Z', '2', '3', '4', '5', '6', '7', '8', '9' };private static final char[] NUMBER_ARRAY = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };private static Random random = new Random();public static String randomString(int length) {StringBuilder sb = new StringBuilder();for (int i = 0; i < length; i++) {sb.Append(String.valueOf(CODE_SEQ[random.nextInt(CODE_SEQ.length)]));}return sb.toString();}public static String randomNumberString(int length) {StringBuilder sb = new StringBuilder();for (int i = 0; i < length; i++) {sb.append(String.valueOf(NUMBER_ARRAY[random.nextInt(NUMBER_ARRAY.length)]));}return sb.toString();}public static Color randomColor(int fc, int bc) {int f = fc;int b = bc;Random random = new Random();if (f > 255) {f = 255;}if (b > 255) {b = 255;}return new Color(f + random.nextInt(b - f), f + random.nextInt(b - f), f + random.nextInt(b - f));}public static int nextInt(int bound) {return random.nextInt(bound);}}


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