无法注入JedisUtil

@Component
public class JedisUtil {

    @Autowired
    private JedisPool jedisPool;

    private Jedis getResource(){
        return jedisPool.getResource();
    }

    public byte[] set(byte[] key, byte[] value) {
        Jedis jedis=getResource();
        try {
            jedis.set(key,value);
            return value;
        } finally {
            jedis.close();
        }
    }

    public void expire(byte[] key, int value) {
        Jedis jedis=getResource();
        try {
            jedis.expire(key,value);
        } finally {
            jedis.close();
        }
    }

    public byte[] get(byte[] key) {
        Jedis jedis=getResource();
        try {
            return jedis.get(key);
        } finally {
            jedis.close();
        }
    }

    public void del(byte[] key) {
        Jedis jedis=getResource();
        try {
            jedis.del(key);
        } finally {
            jedis.close();
        }
    }

    public Set<byte[]> keys(String shiro_session_perfix) {
        Jedis jedis=getResource();
        try {
            return jedis.keys((shiro_session_perfix+"*").getBytes());
        } finally {
            jedis.close();
        }
    }
}

public class RedisSessionDao extends AbstractSessionDAO {

    private final String SHIRO_SESSION_PERFIX = "shiro-session";

    @Autowired
    private JedisUtil jedisUtil;

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.study.shiro.util.JedisUtil' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}