目录1. 编写工具类2. 编写 Controller 中的接口3. 获取验证码图片另一种方法1.添加依赖2.全部代码
1. 编写工具类
package com.cn.beauty.util;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import javax.imageio.ImageIO;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import java.awt.*;import java.awt.image.BufferedImage;import java.util.ArrayList;import java.util.Random;public class RandomValidateCodeUtil { public static final String RANDOMCODEKEY = "MEISHANG-LOGIN-RANDOMVALIDATECODEKEY";//放到session中的key private String randString = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";//随机产生数字与字母组合的字符串 private int width = 95;// 图片宽 private int height = 40;// 图片高 private int stringNum = 4;// 随机产生字符数量 private static final Logger logger = LoggerFactory.getLogger(RandomValidateCodeUtil.class); private Random random = new Random(); /** * 获得字体 */ private Font getFont() { return new Font("Wide Latin", Font.PLAIN, 18); } /** * 获得颜色(粉色为主) */ private Color getRandColor() { ArrayList<Color> colors = new ArrayList<Color>(); colors.add(new Color(241, 158, 194)); colors.add(new Color(255, 94, 226)); colors.add(new Color(255, 156, 177)); colors.add(new Color(245, 152, 217)); colors.add(new Color(255, 85, 81)); colors.add(new Color(245, 152, 251)); int num = random.nextInt(6); return colors.get(num); } /** * 生成随机图片 */ public void getRandcode(HttpServletRequest request, HttpServletResponse response) { HttpSession session = request.getSession(); // BufferedImage类是具有缓冲区的Image类,Image类是用于描述图像信息的类 BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_BGR); Graphics g = image.getGraphics();// 产生Image对象的Graphics对象,改对象可以在图像上进行各种绘制操作 g.fillRect(0, 0, width, height);//图片大小 g.setFont(new Font("Wide Latin", Font.PLAIN, 18));//字体大小 g.setColor(getRandColor());//字体颜色 // 添加噪点 float yawpRate = 0.01f;// 噪声率 int area = (int) (yawpRate * width * height); for (int i = 0; i < area; i++) { int x = random.nextInt(width); int y = random.nextInt(height); image.setRGB(x, y, random.nextInt(255)); } // 绘制随机字符 String randomString = ""; for (int i = 1; i <= stringNum; i++) { randomString = drowString(g, randomString, i); } logger.info(randomString); //将生成的随机字符串保存到session中 session.removeAttribute(RANDOMCODEKEY); session.setAttribute(RANDOMCODEKEY, randomString); g.dispose(); try { // 将内存中的图片通过流动形式输出到客户端 ImageIO.write(image, "JPEG", response.getOutputStream()); } catch (Exception e) { logger.error("将内存中的图片通过流动形式输出到客户端失败>>>> ", e); } } /** * 绘制字符串 */ private String drowString(Graphics g, String randomString, int i) { g.setFont(getFont()); g.setColor(getRandColor()); String rand = String.valueOf(getRandomString(random.nextInt(randString .length()))); randomString += rand; g.translate(random.nextInt(3), random.nextInt(3)); g.drawString(rand, 20 * (i - 1) + 3, 25); return randomString; } /** * 获取随机的字符 */ public String getRandomString(int num) { return String.valueOf(randString.charAt(num)); }}
2. 编写 Controller 中的接口
/** * @description 生成验证码 */@RequestMapping(value = "/user/getVerify")public void getVerify(HttpServletRequest request, HttpServletResponse response) { try { //设置相应类型,告诉浏览器输出的内容为图片 response.setContentType("image/jpeg"); //设置响应头信息，告诉浏览器不要缓存此内容 response.setHeader("Pragma", "No-cache"); response.setHeader("Cache-Control", "no-cache"); response.setDateHeader("Expire", 0); RandomValidateCodeUtil randomValidateCode = new RandomValidateCodeUtil(); //输出验证码图片方法 randomValidateCode.getRandcode(request, response); } catch (Exception e) { log.error("获取验证码失败>>>>", e); }}/** * @description 校验验证码 */@PostMapping("/user/checkVerify")public boolean checkVerify(@RequestParam String verifyInput, HttpSession session) { try { // 从session中获取随机数 String inputStr = verifyInput; String random = (String) session.getAttribute("MEISHANG-LOGIN-RANDOMVALIDATECODEKEY"); if (random == null) { return false; } if (random.equalsIgnoreCase(inputStr)) { return true; } else { return false; } } catch (Exception e) { log.error("验证码校验失败", e); return false; }}
3. 获取验证码图片
访问获取验证码接口
http://127.0.0.1:8605/user/getVerify
效果如下
另一种方法
1.添加依赖
<dependency> <groupId>com.github.penggle</groupId> <artifactId>kaptcha</artifactId> <version>2.3.2</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency>
项目结构
2.全部代码
UserController
package com.yzm.config;import java.util.HashMap;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.ResponseBody;import com.google.code.kaptcha.impl.DefaultKaptcha;import com.yzm.utils.Util;@Controllerpublic class TestControler { @Resource private DefaultKaptcha captchaProducer; /** * 登录验证码SessionKey */ public static final String LOGIN_VALIDATE_CODE = "login_validate_code"; /** * 登录验证码图片 */ @RequestMapping(value = {"/loginValidateCode"}) public void loginValidateCode(HttpServletRequest request, HttpServletResponse response) throws Exception{ Util.validateCode(request,response,captchaProducer,LOGIN_VALIDATE_CODE); } /** * 检查验证码是否正确 */ @RequestMapping("/checkLoginValidateCode") @ResponseBody public HashMap checkLoginValidateCode(HttpServletRequest request,@RequestParam("validateCode")String validateCode) { String loginValidateCode = request.getSession().getAttribute(LOGIN_VALIDATE_CODE).toString(); HashMap<String,Object> map = new HashMap<String,Object>(); if(loginValidateCode == null){ map.put("status",null);//验证码过期 }else if(loginValidateCode.equals(validateCode)){ map.put("status",true);//验证码正确 }else if(!loginValidateCode.equals(validateCode)){ map.put("status",false);//验证码不正确 } map.put("code",200); return map; }}package com.yzm.controller;import java.util.Properties;import org.springframework.context.annotation.Bean;import org.springframework.stereotype.Component;import com.google.code.kaptcha.impl.DefaultKaptcha;import com.google.code.kaptcha.util.Config;@Componentpublic class TestConfig { @Bean public DefaultKaptcha getDefaultKaptcha() { DefaultKaptcha defaultKaptcha = new DefaultKaptcha(); Properties properties = new Properties(); // 图片边框 properties.setProperty("kaptcha.border", "no"); // 边框颜色 properties.setProperty("kaptcha.border.color", "black"); //边框厚度 properties.setProperty("kaptcha.border.thickness", "1"); // 图片宽 properties.setProperty("kaptcha.image.width", "200"); // 图片高 properties.setProperty("kaptcha.image.height", "50"); //图片实现类 properties.setProperty("kaptcha.producer.impl", "com.google.code.kaptcha.impl.DefaultKaptcha"); //文本实现类 properties.setProperty("kaptcha.textproducer.impl", "com.google.code.kaptcha.text.impl.DefaultTextCreator"); //文本集合，验证码值从此集合中获取 properties.setProperty("kaptcha.textproducer.char.string", "01234567890"); //验证码长度 properties.setProperty("kaptcha.textproducer.char.length", "4"); //字体 properties.setProperty("kaptcha.textproducer.font.names", "宋体"); //字体颜色 properties.setProperty("kaptcha.textproducer.font.color", "black"); //文字间隔 properties.setProperty("kaptcha.textproducer.char.space", "5"); //干扰实现类 properties.setProperty("kaptcha.noise.impl", "com.google.code.kaptcha.impl.DefaultNoise"); //干扰颜色 properties.setProperty("kaptcha.noise.color", "blue"); //干扰图片样式 properties.setProperty("kaptcha.obscurificator.impl", "com.google.code.kaptcha.impl.WaterRipple"); //背景实现类 properties.setProperty("kaptcha.background.impl", "com.google.code.kaptcha.impl.DefaultBackground"); //背景颜色渐变，结束颜色 properties.setProperty("kaptcha.background.clear.to", "white"); //文字渲染器 properties.setProperty("kaptcha.word.impl", "com.google.code.kaptcha.text.impl.DefaultWordRenderer"); Config config = new Config(properties); defaultKaptcha.setConfig(config); return defaultKaptcha; } }
Util
package com.yzm.utils;import java.awt.image.BufferedImage;import javax.imageio.ImageIO;import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.google.code.kaptcha.impl.DefaultKaptcha;public class Util { /** * 生成验证码图片 * @param request 设置session * @param response 转成图片 * @param captchaProducer 生成图片方法类 * @param validateSessionKey session名称 * @throws Exception */ public static void validateCode(HttpServletRequest request, HttpServletResponse response, DefaultKaptcha captchaProducer, String validateSessionKey) throws Exception{ // Set to expire far in the past. response.setDateHeader("Expires", 0); // Set standard HTTP/1.1 no-cache headers. response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate"); // Set IE extended HTTP/1.1 no-cache headers (use addHeader). response.addHeader("Cache-Control", "post-check=0, pre-check=0"); // Set standard HTTP/1.0 no-cache header. response.setHeader("Pragma", "no-cache"); // return a jpeg response.setContentType("image/jpeg"); // create the text for the image String capText = captchaProducer.createText(); // store the text in the session request.getSession().setAttribute(validateSessionKey, capText); // create the image with the text BufferedImage bi = captchaProducer.createImage(capText); ServletOutputStream out = response.getOutputStream(); // write the data out ImageIO.write(bi, "jpg", out); try { out.flush(); } finally { out.close(); } }}
以上就是SpringBoot 图形验证码的生成和校验的详细内容，更多关于SpringBoot 验证码的生成和校验的资料请关注其它相关文章！
可就是这样，还是有人，期望过多的温暖。
