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上文我们已经整合好了jwt,本文我们开始实现图形验证码接口的实现。
本文衔接上文,请从上文开始
spring boot3登录开发(整合jwt)_springboot3 jwt-CSDN博客
pom.xml:
- <dependency>
- <groupId>com.github.penggle</groupId>
- <artifactId>kaptcha</artifactId>
- <version>最新版本</version>
- </dependency>
注意:请替换最新版本
为实际可用的最新版本号。
创建一个配置类来配置Kaptcha。这通常包括设置验证码的文本长度、字体、颜色、图片大小等属性,在Spring Boot的配置类中添加Kaptcha的配置。
- import com.google.code.kaptcha.impl.DefaultKaptcha;
- import com.google.code.kaptcha.util.Config;
- import java.util.Properties;
- import org.springframework.context.annotation.Bean;
- import org.springframework.context.annotation.Configuration;
-
- @Configuration
- public class KaptchaConfig {
-
- @Bean
- public DefaultKaptcha getDefaultKaptcha() {
- DefaultKaptcha defaultKaptcha = new DefaultKaptcha();
- Properties properties = new Properties();
- // 设置验证码的长度
- properties.setProperty("kaptcha.textproducer.char.length", "4");
- // 设置字体
- properties.setProperty("kaptcha.textproducer.font.names", "宋体");
- // 字体大小
- properties.setProperty("kaptcha.textproducer.font.size", "30");
- // 字体颜色
- properties.setProperty("kaptcha.textproducer.font.color", "black");
- // 设置图片宽度
- properties.setProperty("kaptcha.image.width", "125");
- // 设置图片高度
- properties.setProperty("kaptcha.image.height", "45");
- // 设置背景色
- properties.setProperty("kaptcha.background.clear.to.white", "true");
- // 设置是否有边框
- properties.setProperty("kaptcha.border", "yes");
- // 边框颜色
- properties.setProperty("kaptcha.border.color", "105,179,90");
- // 验证码图片样式
- Config config = new Config(properties);
- defaultKaptcha.setConfig(config);
- return defaultKaptcha;
- }
- }
这里用到了redis,需要整合好:Spring Boot与Redis深度整合:实战指南
- import com.google.code.kaptcha.impl.DefaultKaptcha;
- import com.google.code.kaptcha.util.Config;
- import org.springframework.beans.factory.annotation.Autowired;
- import org.springframework.data.redis.core.StringRedisTemplate;
- import org.springframework.stereotype.Service;
-
- import javax.imageio.ImageIO;
- import javax.servlet.ServletOutputStream;
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
- import java.awt.image.BufferedImage;
- import java.io.ByteArrayOutputStream;
- import java.util.Properties;
-
- @Service
- public class CaptchaService {
-
- private DefaultKaptcha defaultKaptcha;
-
- @Autowired
- private StringRedisTemplate redisTemplate;
-
- public CaptchaService() {
- defaultKaptcha = new DefaultKaptcha();
- Properties properties = new Properties();
- // 设置验证码相关属性,如字体、大小、颜色等
- properties.setProperty("kaptcha.border", "yes");
- properties.setProperty("kaptcha.border.color", "105,179,90");
- // ... 其他属性设置
- Config config = new Config(properties);
- defaultKaptcha.setConfig(config);
- }
-
- public void createCaptcha(HttpServletRequest request, HttpServletResponse response) throws Exception {
- String captchaText = defaultKaptcha.createText();
- String key = UUID.randomUUID().toString(); // 生成唯一的key
- redisTemplate.opsForValue().set(key, captchaText, 60, TimeUnit.SECONDS); // 将验证码保存到Redis,并设置过期时间
- request.getSession().setAttribute("captchaKey", key); // 将key保存到session中,用于前端验证
-
- BufferedImage image = defaultKaptcha.createImage(captchaText);
- ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
- ImageIO.write(image, "jpg", byteArrayOutputStream);
- byte[] captchaImage = byteArrayOutputStream.toByteArray();
-
- response.setDateHeader("Expires", 0);
- response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
- response.addHeader("Cache-Control", "post-check=0, pre-check=0");
- response.setHeader("Pragma", "no-cache");
- response.setContentType("image/jpeg");
-
- ServletOutputStream out = response.getOutputStream();
- out.write(captchaImage);
- out.flush();
- out.close();
- }
- }
在控制器中创建一个接口,创建一个控制器来处理验证码的生成请求。该接口通常是一个HTTP GET请求,返回验证码图片。
- import org.springframework.beans.factory.annotation.Autowired;
- import org.springframework.web.bind.annotation.GetMapping;
- import org.springframework.web.bind.annotation.RestController;
-
- import javax.servlet.http.HttpServletRequest;
- import javax.servlet.http.HttpServletResponse;
-
- @RestController
- public class CaptchaController {
-
- @Autowired
- private CaptchaService captchaService;
-
- @GetMapping("/captcha")
- public void getCaptcha(HttpServletRequest request, HttpServletResponse response) throws Exception {
- captchaService.createCaptcha(request, response);
- }
- }
使用npm或yarn安装Axios,以便进行HTTP请求。
npm install axios --save
或者
yarn add axios
- <template>
- <div>
- <img :src="captchaSrc" @click="refreshCaptcha" alt="验证码" />
- <input type="text" v-model="captchaInput" placeholder="请输入验证码" />
- <button @click="submitForm">提交</button>
- </div>
- </template>
-
- <script>
- import axios from 'axios';
-
- export default {
- data() {
- return {
- captchaSrc: '',
- captchaInput: '',
- };
- },
- methods: {
- refreshCaptcha() {
- this.getCaptcha();
- },
- getCaptcha() {
- axios.get('/captcha')
- .then(response => {
- this.captchaSrc = window.URL.createObjectURL(new Blob([response.data]));
- })
- .catch(error => {
- console.error(error);
- });
- },
- submitForm() {
- // 提交表单逻辑,包括验证captchaInput是否正确
- // ...
- },
- },
- mounted() {
- this.getCaptcha();
- },
- };
- </script>
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