05-Jedis和SpringBoot整合Redis

1.Jedis测试

1.1导入jar包

    <dependencies>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>3.2.0</version>
        </dependency>
    </dependencies>

1.2修改redis.conf配置文件，使其能被其他主机连接

• 1.bind 127.0.0.1 -::1：注释掉
• 2.保护模式protected-mode：开发环境中要改成protected-mode no

1.3重启redis服务

• 主要要关掉虚拟机的防火墙。
• systemctl status firewalld：查看防火墙状态
• systemctl stop firewalld：临时关闭防火墙
• disable firewalld.service：永久禁用Linux的防火墙

1.4测试连接代码

    public static void main(String[] args) {
    
    
        //创建Jedis对象
        Jedis jedis = new Jedis("192.168.92.130", 6379);
        //测试
        String result = jedis.ping();
        System.out.println(result);
    }

测试连接成功：

1.5Jedis常用操作

相关命令和API基本是对应的。

1.5.1Jedis-API: Key

jedis.set("k1", "v1");
jedis.set("k2", "v2");
jedis.set("k3", "v3");
Set<String> 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"));

1.5.2Jedis-API: String

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

1.5.3Jedis-API: List

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

1.5.4Jedis-API: Set

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

1.5.5Jedis-API: hash

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

1.5.6Jedis-API: zset

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

1.6.模拟手机验证码

1.需求：

• 输入手机号，点击发送后随即生成6为数字码，2分钟有效
• 输入验证码，点击验证，返回成功或失败
• 每个手机号每天只能输入3次。

2.相关代码

public class PhoneCode {
    
    
    public static void main(String[] args) {
    
    
        //模拟发送验证码
        //sendCode("1234567890");

        //校验验证码
        verifyCode("1234567890", "273938");
    }

    /**
     * 1.生成6为随机码
     * @return
     */
    public static String getCode(){
    
    
        Random random = new Random();
        StringBuilder sb = new StringBuilder("");
        for (int i = 0; i < 6; i++) {
    
    
            int code = random.nextInt(10);
            sb.append(code);
        }
        return sb.toString();
    }

    /**
     * 2.模拟发送验证码：
     * 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
     */
	public static void sendCode(String phone){
    
    
        //1.创建Jedis对象
        Jedis jedis = new Jedis("192.168.92.130", 6379);

        //2.拼接key
        //手机发送次数key
        String countKey = "VerifyCode"+phone+":count";
        //验证码key
        String codeKey = "VerifyCode"+phone+":code";

        //3.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1
            jedis.setex(countKey, 24*60*60, "1");

            //4.发送的验证码次数不超过3次时，执行该步骤：放到redis中
            String code = getCode();
            jedis.setex(codeKey, 24*60*60, code);
        }else if(Integer.parseInt(count) <= 2){
    
    
            //发送次数+1
            jedis.incr(countKey);

            //4.发送的验证码次数不超过3次时，执行该步骤：放到redis中
            String code = getCode();
            jedis.setex(codeKey, 24*60*60, code);
        }else if(Integer.parseInt(count) > 2){
    
    
            //发送3次了
            System.out.println("已经发送3次验证码，达到上限。");
            jedis.close();
        }

        jedis.close();
    }

    /**
     * 3.验证校验码
     * @param phone
     * @param code
     */
    public static void verifyCode(String phone, String code){
    
    
        //1.创建Jedis对象
        Jedis jedis = new Jedis("192.168.92.130", 6379);

        //2.验证码key
        String codeKey = "VerifyCode"+phone+":code";
        String redisCode = jedis.get(codeKey);

        //3.判断
        if(code.equals(redisCode)){
    
    
            System.out.println("验证成功");
        }else{
    
    
            System.out.println("校验失败");
        }
        jedis.close();
    }
}

2.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

2.1.先新建一个SpringBoot项目

注意：要创建一个web项目。

2.2.添加相关依赖

   <!-- redis -->
   <dependency>
       <groupId>org.springframework.boot</groupId>
       <artifactId>spring-boot-starter-data-redis</artifactId>
   </dependency>

   <!-- spring2.X集成redis所需common-pool2连接池-->
   <dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-pool2</artifactId>
       <version>2.6.0</version>
   </dependency>

2.3.配置application.properties文件

	#Redis服务器地址
	spring.redis.host=192.168.140.136
	#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

2.4.添加redis配置类

@EnableCaching
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
    
    

    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
    
    
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        RedisSerializer<String> 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<String> 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;
    }
}

2.5.测试方法

@RestController
@RequestMapping("/redisTest")
public class RedisTestController {
    
    
    @Autowired
    private RedisTemplate redisTemplate;

    @GetMapping
    public String testRedsi(){
    
    
        //设置值到redis
        redisTemplate.opsForValue().set("name", "lucy");

        //从redis中获取值
        String name = (String)redisTemplate.opsForValue().get("name");
        return name;
    }
}