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本章簡單介紹redis的配置及使用方法,本文示例代碼在前面代碼的基礎上進行修改添加,實現了使用redis進行緩存驗證碼,以及校驗驗證碼的過程。
1、添加依賴庫(添加redis庫,以及第三方的驗證碼庫)
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-redis</artifactId> </dependency> <dependency> <groupId>cn.apiclub.tool</groupId> <artifactId>simplecaptcha</artifactId> <version>1.2.2</version> </dependency>
2、在application.properties中添加redis的配置信息
spring.redis.database=4 spring.redis.host=hostname spring.redis.password=password spring.redis.port=6379 spring.redis.timeout=2000 spring.redis.pool.max-idle=8 spring.redis.pool.min-idle=0 spring.redis.pool.max-active=8 spring.redis.pool.max-wait=-1
3、添加redis數據模版
新增RedisConfig.Java
package com.xiaofangtech.sun.config; import org.springframework.context.annotation.Bean; import org.springframework.data.redis.connection.RedisConnectionFactory; import org.springframework.data.redis.connection.jedis.JedisConnectionFactory; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.data.redis.serializer.StringRedisSerializer; public class RedisConfig { @Bean JedisConnectionFactory jedisConnectionFactory() { return new JedisConnectionFactory(); } @Bean RedisTemplate<String, String>redisTemplate(RedisConnectionFactory factory) { RedisTemplate<String, String> template = new RedisTemplate<String, String>(); template.setConnectionFactory(jedisConnectionFactory()); template.setKeySerializer(new StringRedisSerializer()); template.setValueSerializer(new StringRedisSerializer()); return template; } }
4、redis的基本使用(緩存生成的驗證碼信息)
新建CaptchaModule.java,涉及redis插入操作關鍵代碼
@Autowired private RedisTemplate<String, String> redisTemplate; //將驗證碼以<key,value>形式緩存到redis redisTemplate.opsForValue().set(uuid, captcha.getAnswer(), captchaExpires, TimeUnit.SECONDS);
完整代碼
package com.xiaofangtech.sunt.utils; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.UUID; import java.util.concurrent.TimeUnit; import javax.imageio.ImageIO; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletResponse; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.http.MediaType; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.bind.annotation.RestController; import cn.apiclub.captcha.Captcha; import cn.apiclub.captcha.backgrounds.GradiatedBackgroundProducer; import cn.apiclub.captcha.gimpy.FishEyeGimpyRenderer; @RestController @RequestMapping("captcha") public class CaptchaModule { @Autowired private RedisTemplate<String, String> redisTemplate; private static int captchaExpires = 3*60; //超時時間3min private static int captchaW = 200; private static int captchaH = 60; @RequestMapping(value = "getcaptcha", method = RequestMethod.GET, produces = MediaType.IMAGE_PNG_VALUE) public @ResponseBody byte[] getCaptcha(HttpServletResponse response) { //生成驗證碼 String uuid = UUID.randomUUID().toString(); Captcha captcha = new Captcha.Builder(captchaW, captchaH) .addText().addBackground(new GradiatedBackgroundProducer()) .gimp(new FishEyeGimpyRenderer()) .build(); //將驗證碼以<key,value>形式緩存到redis redisTemplate.opsForValue().set(uuid, captcha.getAnswer(), captchaExpires, TimeUnit.SECONDS); //將驗證碼key,及驗證碼的圖片返回 Cookie cookie = new Cookie("CaptchaCode",uuid); response.addCookie(cookie); ByteArrayOutputStream bao = new ByteArrayOutputStream(); try { ImageIO.write(captcha.getImage(), "png", bao); return bao.toByteArray(); } catch (IOException e) { return null; } } }
5、redis內容的獲取(根據key獲取驗證碼)
完善前面獲取token的流程,在獲取token的接口中添加校驗驗證碼的流程(根據登錄參數中的驗證碼id獲取驗證碼內容,并與登錄參數中的驗證碼內容進行比對)
修改JsonWebToken.java
@Autowired private RedisTemplate<String, String> redisTemplate; //驗證碼校驗在后面章節添加 String captchaCode = loginPara.getCaptchaCode(); try { if (captchaCode == null) { throw new Exception(); } String captchaValue = redisTemplate.opsForValue().get(captchaCode); if (captchaValue == null) { throw new Exception(); } redisTemplate.delete(captchaCode); if (captchaValue.compareTo(loginPara.getCaptchaValue()) != 0) { throw new Exception(); } } catch (Exception e) { resultMsg = new ResultMsg(ResultStatusCode.INVALID_CAPTCHA.getErrcode(), ResultStatusCode.INVALID_CAPTCHA.getErrmsg(), null); return resultMsg; }
6、測試
1)請求獲取驗證碼,可以獲取到驗證碼圖片,以及在cookie中返回緩存入redis的key值
2)查看redis,可以查看到之前緩存的key value
3)登錄獲取token時,添加驗證碼參數
如果驗證碼錯誤,返回驗證碼錯誤
驗證碼正確,且用戶名密碼正確,返回token
總結
以上所述是小編給大家介紹的實例詳解Spring Boot實戰之Redis緩存登錄驗證碼,希望對大家有所幫助,如果大家有任何疑問請給我留言,小編會及時回復大家的。在此也非常感謝大家對億速云網站的支持!
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