2.连接Redis注意事项

（1）禁用Linux的防火墙：Linux执行：systemctl stop/disable firewalld.service  

（2）redis.conf中注释掉bind 127.0.0.1 ,然后 protected-mode n

3.Jedis常用操作 3.1 创建测试程序

package com.atguigu.jedis; import redis.clients.jedis.Jedis; public class Demo01 {         public static void main(String[] args) {                 Jedis jedis = new Jedis("192.168.211.131",6379);                 String pong = jedis.ping();                 System.out.println("连接成功："+pong);                 jedis.close();         } }

3.2 测试相关数据类型

Jedis-API:    Key

jedis.set("k1", "v1"); jedis.set("k2", "v2"); jedis.set("k3", "v3"); Set keys = jedis.keys("*"); System.out.println(keys.size()); for (String key : keys) {         System.out.println(key); } System.out.println(jedis.exists("k1")); System.out.println(jedis.ttl("k1"));                System.out.println(jedis.get("k1"));

Jedis-API:    String

jedis.mset("str1","v1","str2","v2","str3","v3"); System.out.println(jedis.mget("str1","str2","str3"));

Jedis-API:    List

List list = jedis.lrange("mylist",0,-1); for (String element : list) {         System.out.println(element); }

Jedis-API:    set

jedis.sadd("orders", "order01"); jedis.sadd("orders", "order02"); jedis.sadd("orders", "order03"); jedis.sadd("orders", "order04"); Set smembers = jedis.smembers("orders"); for (String order : smembers) {         System.out.println(order); } jedis.srem("orders", "order02");

Jedis-API:    hash

jedis.hset("hash1","userName","lisi"); System.out.println(jedis.hget("hash1","userName")); Map map = new HashMap(); map.put("telphone","13810169999"); map.put("address","atguigu"); map.put("email","abc@163.com"); jedis.hmset("hash2",map); List result = jedis.hmget("hash2", "telphone","email"); for (String element : result) {         System.out.println(element); }

Jedis-API:    zset

jedis.zadd("zset01", 100d, "z3"); jedis.zadd("zset01", 90d, "l4"); jedis.zadd("zset01", 80d, "w5"); jedis.zadd("zset01", 70d, "z6"); Set zrange = jedis.zrange("zset01", 0, -1); for (String e : zrange) {         System.out.println(e); }

4.手机验证码操作 4.1 需求分析

4.2 代码实现

package com.han.jedis;

import redis.clients.jedis.Jedis;

import java.util.Random;

public class PhoneCode {

    public static void main(String[] args) {
        //模拟验证码发送
        verifyCode("13986895555");

        //模拟验证码校验
        //getRedisCode("13986895555","4444");
    }

    //3 验证码校验
    public static void getRedisCode(String phone,String code) {
        //从redis获取验证码
        Jedis jedis = new Jedis("192.168.211.131",6379);
        //验证码key
        String codeKey = "VerifyCode"+phone+":code";
        String redisCode = jedis.get(codeKey);
        //判断
        if(redisCode.equals(code)) {
            System.out.println("成功");
        }else {
            System.out.println("失败");
        }
        jedis.close();
    }

    //2 每个手机每天只能发送三次，验证码放到redis中，设置过期时间120
    public static void verifyCode(String phone) {
        //连接redis
        Jedis jedis = new Jedis("192.168.211.131",6379);

        //拼接key
        //手机发送次数key
        String countKey = "VerifyCode"+phone+":count";
        //验证码key
        String codeKey = "VerifyCode"+phone+":code";

        //每个手机每天只能发送三次
        String count = jedis.get(countKey);
        if(count == null) {
            //没有发送次数，第一次发送
            //设置发送次数是1
            jedis.setex(countKey,24*60*60,"1");
        } else if(Integer.parseInt(count)<=2) {
            //发送次数+1
            jedis.incr(countKey);
        } else if(Integer.parseInt(count)>2) {
            //发送三次，不能再发送
            System.out.println("今天发送次数已经超过三次");
            jedis.close();
        }

        //发送验证码放到redis里面
        String vcode = getCode();
        jedis.setex(codeKey,120,vcode);
        jedis.close();
    }

    //1 生成6位数字验证码
    public static String getCode() {
        Random random = new Random();
        String code = "";
        for(int i=0;i<6;i++) {
            int rand = random.nextInt(10);
            code += rand;
        }
        return code;
    }
}

5.Springboot整合redis

Spring Boot整合Redis非常简单，只需要按如下步骤整合即可

整合步骤

（1）在pom.xml文件中引入redis相关依赖

org.springframework.boot spring-boot-starter-data-redis org.apache.commons commons-pool2 2.6.0

（2）application.properties配置redis配置

#Redis服务器地址 spring.redis.host=192.168.211.131 #Redis服务器连接端口 spring.redis.port=6379 #Redis数据库索引（默认为0） spring.redis.database= 0 #连接超时时间（毫秒） spring.redis.timeout=1800000 #连接池最大连接数（使用负值表示没有限制） spring.redis.lettuce.pool.max-active=20 #最大阻塞等待时间(负数表示没限制) spring.redis.lettuce.pool.max-wait=-1 #连接池中的最大空闲连接 spring.redis.lettuce.pool.max-idle=5 #连接池中的最小空闲连接 spring.redis.lettuce.pool.min-idle=0

（3）添加redis配置类

@EnableCaching @Configuration public class RedisConfig extends CachingConfigurerSupport {     @Bean     public RedisTemplate redisTemplate(RedisConnectionFactory factory) {         RedisTemplate template = new RedisTemplate<>();         RedisSerializer redisSerializer = new StringRedisSerializer();         Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);         ObjectMapper om = new ObjectMapper();         om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);         om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);         jackson2JsonRedisSerializer.setObjectMapper(om);         template.setConnectionFactory(factory); //key序列化方式         template.setKeySerializer(redisSerializer); //value序列化         template.setValueSerializer(jackson2JsonRedisSerializer); //value hashmap序列化         template.setHashValueSerializer(jackson2JsonRedisSerializer);         return template;     }     @Bean     public CacheManager cacheManager(RedisConnectionFactory factory) {         RedisSerializer redisSerializer = new StringRedisSerializer();         Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class); //解决查询缓存转换异常的问题         ObjectMapper om = new ObjectMapper();         om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);         om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);         jackson2JsonRedisSerializer.setObjectMapper(om); // 配置序列化（解决乱码的问题）,过期时间600秒         RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()                 .entryTtl(Duration.ofSeconds(600))                 .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))                 .serializevaluesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))                 .disableCachingNullValues();         RedisCacheManager cacheManager = RedisCacheManager.builder(factory)                 .cacheDefaults(config)                 .build();         return cacheManager;     } }

（4）测试一下

RedisTestController中添加测试方法

@RestController @RequestMapping("/redisTest") public class RedisTestController {     @Autowired     private RedisTemplate redisTemplate;//引入RedisTemplate     @GetMapping     public String testRedis() {         //设置值到redis         redisTemplate.opsForValue().set("name","lucy");         //从redis获取值         String name = (String)redisTemplate.opsForValue().get("name");         return name;     } }