Springboot集成系统登录验证码

深藏阁楼爱情的钟 2023-09-25 18:48 73阅读 0赞

#### Springboot集成系统登录验证码 ####

*   *  1 : 验证码示例
     *  2 : 代码
     *   *  2.1 : 对外接口 controller
         *  2.2 : 业务服务 service
         *  2.3 : 工具类 util

### 1 : 验证码示例 ###

![在这里插入图片描述][a2a019282aed41eaaf9badcbb887779b.png]

### 2 : 代码 ###

#### 2.1 : 对外接口 controller ####

VerifyController.java

package com.encrypt.common.controller;
    
    import com.encrypt.common.service.IVerifyService;
    import com.encrypt.config.bean.Result;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    import javax.annotation.Resource;
    
    @Controller
    public class VerifyController {
        
    
        @Resource
        private IVerifyService verifyService;
    
        //获取验证码
        @RequestMapping("/getVerifyCode")
        @ResponseBody
        public Result getVerifyCode() throws Exception{
        
            return verifyService.getVerifyCode();
        }
    
    }

#### 2.2 : 业务服务 service ####

IVerifyService .java

package com.encrypt.common.service;
    
    import com.encrypt.config.bean.Result;
    import java.io.IOException;
    
    public interface IVerifyService {
        
    
        Result getVerifyCode() throws IOException;
    
    }

VerifyServiceImpl.java

package com.encrypt.common.service.impl;
    
    import com.encrypt.common.service.IVerifyService;
    import com.encrypt.config.bean.Result;
    import com.encrypt.config.utils.RedisUtil;
    import com.encrypt.config.utils.VerifyCodeUtils;
    import lombok.extern.slf4j.Slf4j;
    import org.springframework.stereotype.Service;
    import javax.annotation.Resource;
    import java.io.ByteArrayOutputStream;
    import java.io.IOException;
    import java.util.Base64;
    import java.util.HashMap;
    import java.util.Map;
    import java.util.UUID;
    
    @Service
    @Slf4j
    public class VerifyServiceImpl implements IVerifyService {
        
    
        @Resource
        private RedisUtil redisUtil;
    
        /**
         * generate verification code
         */
        @Override
        public Result getVerifyCode() throws IOException {
        
            String verifyCode = VerifyCodeUtils.generateVerifyCode(4);
            log.info("The current verification code is：" + verifyCode + "\n");
            String verifyKey = UUID.randomUUID().toString();
            redisUtil.delete("verify:" + verifyKey);
            redisUtil.setEx("verify:" + verifyKey, verifyCode, 300);
            ByteArrayOutputStream output = new ByteArrayOutputStream();
            VerifyCodeUtils.outputImage(VerifyCodeUtils.VERIFY_CODE_WIDE, VerifyCodeUtils.VERIFY_CODE_HIGH, output, verifyKey);
            String imageBase = Base64.getEncoder().encodeToString(output.toByteArray());
            Result<Map<String,Object>> result = new Result<>();
            result.setData(new HashMap<String,Object>(){
        {
        
                put("verifyKey", verifyKey);
                put("verifyIO", imageBase);
            }});
            return result;
        }
    
    }

#### 2.3 : 工具类 util ####

VerifyCodeUtils.java

package com.encrypt.config.utils;
    
    import javax.imageio.ImageIO;
    import java.awt.*;
    import java.awt.geom.AffineTransform;
    import java.awt.image.BufferedImage;
    import java.io.IOException;
    import java.io.OutputStream;
    import java.math.BigDecimal;
    import java.security.SecureRandom;
    import java.util.Arrays;
    
    public class VerifyCodeUtils {
        
        private static SecureRandom random = new SecureRandom();
        //验证码内容
        public static final String VERIFY_CODE_SOURCE = "0123456789";
        //验证码高度
        public static final int VERIFY_CODE_HIGH = 38;
        //验证码宽度
        public static final int VERIFY_CODE_WIDE = 99;
        //验证码存入session中的Key
        public static final String VERIFY_CODE = "verify_code";
    
        /**
         * 使用系统默认字符源生成验证码
         * @param verifySize 验证码长度
         */
        public static String generateVerifyCode(int verifySize) {
        
            return generateVerifyCode(verifySize, VERIFY_CODE_SOURCE);
        }
    
        /**
         * 使用指定源生成验证码
         * @param verifySize 验证码长度
         * @param sources 验证码字符源
         */
        public static String generateVerifyCode(int verifySize, String sources) {
        
            if (sources == null || sources.length() == 0) sources = VERIFY_CODE_SOURCE;
            SecureRandom rand = new SecureRandom();
            StringBuilder verifyCode = new StringBuilder(verifySize);
            for (int i = 0; i < verifySize; i++) {
        
                verifyCode.append(sources.charAt(rand.nextInt(sources.length() - 1)));
            }
            return verifyCode.toString();
        }
    
        /**
         * 输出指定验证码图片流
         */
        public static void outputImage(int w, int h, OutputStream os, String code) throws IOException {
        
            int verifySize = code.length();
            BufferedImage image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
            SecureRandom rand = new SecureRandom();
            Graphics2D g2 = image.createGraphics();
            g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
            Color[] colors = new Color[5];
            Color[] colorSpaces = new Color[] {
         Color.BLACK, Color.CYAN, Color.GRAY, Color.LIGHT_GRAY, Color.MAGENTA,
                    Color.ORANGE, Color.PINK, Color.YELLOW };
            float[] fractions = new float[colors.length];
            for (int i = 0; i < colors.length; i++) {
        
                colors[i] = colorSpaces[rand.nextInt(colorSpaces.length)];
                fractions[i] = rand.nextFloat();
            }
            Arrays.sort(fractions);
            g2.setColor(Color.WHITE);// 设置边框色
            g2.fillRect(0, 0, w, h);
            Color c = getRandColor(150, 250);
            g2.setColor(c);// 设置背景色
    //		g2.fillRect(0, 2, w, h - 4);
            // 绘制干扰线
            SecureRandom random = new SecureRandom();
            g2.setColor(getRandColor(160, 200));// 设置线条的颜色
            for (int i = 0; i < 20; i++) {
        
                int x = random.nextInt(w - 1);
                int y = random.nextInt(h - 1);
                int xl = random.nextInt(6) + 1;
                int yl = random.nextInt(12) + 1;
                g2.drawLine(x, y, x + xl + 40, y + yl + 20);
            }
            //添加噪点
    //        float yawpRate = 0.05f;// 噪声率
            BigDecimal yawpRate = new BigDecimal(0.05);
            BigDecimal w1 = new BigDecimal(w);
            BigDecimal h1 = new BigDecimal(h);
            int area = yawpRate.multiply(w1).multiply(h1).intValue();
            for (int i = 0; i < area; i++) {
        
                int x = random.nextInt(w);
                int y = random.nextInt(h);
                int rgb = getRandomIntColor();
                image.setRGB(x, y, rgb);
            }
    //		shear(g2, w, h, c);// 使图片扭曲
            g2.setColor(getRandColor(100, 160));
            int fontSize = h - 6;
            Font font = new Font("Bitstream Charter", Font.BOLD, fontSize);
            g2.setFont(font);
            char[] chars = code.toCharArray();
            AffineTransform affine = null;
            for (int i = 0; i < verifySize; i++) {
        
                affine = new AffineTransform();
                affine.setToRotation(Math.PI / 4 * rand.nextDouble() * (rand.nextBoolean() ? 1 : -1),
                        (w / verifySize) * i + fontSize / 2, h / 2);
                g2.setTransform(affine);
                g2.drawChars(chars, i, 1, ((w - 10) / verifySize) * i + 5, h / 2 + fontSize / 2 - 10);
            }
            g2.dispose();
            ImageIO.write(image, "jpg", os);
        }
    
        private static Color getRandColor(int fc, int bc) {
        
            if (fc > 255){
        
                fc = 255;}
            if (bc > 255){
        
                bc = 255;}
            int r = fc + random.nextInt(bc - fc);
            int g = fc + random.nextInt(bc - fc);
            int b = fc + random.nextInt(bc - fc);
            return new Color(r, g, b);
        }
    
        private static int getRandomIntColor() {
        
            int[] rgb = getRandomRgb();
            int color = 0;
            for (int c : rgb) {
        
                color = color << 8;
                color = color | c;
            }
            return color;
        }
    
        private static int[] getRandomRgb() {
        
            int[] rgb = new int[3];
            for (int i = 0; i < 3; i++) {
        
                rgb[i] = random.nextInt(255);
            }
            return rgb;
        }
    
    }

[a2a019282aed41eaaf9badcbb887779b.png]: https://img-blog.csdnimg.cn/a2a019282aed41eaaf9badcbb887779b.png