java-redis

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-json</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>2.4.3</version>
        </dependency>

/**
 * @author 
 * @date: 2019-01-09 11:14
 * @des: redis配置
 */
@Configuration
public class RedisTemplateConfig {

    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        GenericJackson2JsonRedisSerializer jackson2JsonRedisSerializer = new GenericJackson2JsonRedisSerializer();
        // 设置值（value）的序列化采用FastJsonRedisSerializer。
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        // 设置键（key）的序列化采用StringRedisSerializer。
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }

}

/**
 * @author 
 * @date: 2019-01-09 11:14
 * @des: redis工具类
 */
@Component
public class RedisUtil {

    @Autowired
    StringRedisTemplate stringRedisTemplate;
    @Autowired
    RedisTemplate<String, Object> redisTemplate;

    /**
     * TODO 判断key是否存在
     * @param key
     * @return
     */
    public boolean hasKey(String key){
        try {
            return redisTemplate.hasKey(key);
        }catch (Exception e){
            e.printStackTrace();
            return false;
        }
    }

    /**
     * TODO 添加键值对
     * @param key
     * @param value
     */
    public void append(String key,String value){
        stringRedisTemplate.opsForValue().append(key,value);
    }

    /**
     * TODO 根据key获取值
     * @param key
     * @return
     */
    public String get(String key){
       return stringRedisTemplate.opsForValue().get(key);
    }

    /**
     *  TODO incr
     * @param key
     * @param delta 要增加几(大于0)
     * @return
     */
    public long incr(String key, long delta){
        if(delta<0){
            throw new RuntimeException("递增因子必须大于0");
        }
        return redisTemplate.opsForValue().increment(key, delta);
    }

}