public class RedisInterceptor implements MethodInterceptor {

	protected JedisAgent jedisAgent;
	
	protected static ThreadLocal<Jedis> TL = new ThreadLocal<Jedis>();
	
	public void filter(InterceptorChain chain) throws Throwable {
		if (TL.get() != null) {
			chain.doChain();
			return;
		}
		Jedis jedis = null;
		try {
		    jedis = jedisAgent.jedis();
			TL.set(jedis);
			chain.doChain();
		} finally{
            Streams.safeClose(jedis);
			TL.remove();
		}
	}
	

	public static Jedis jedis() {
		return TL.get();
	}
	
	public void setJedisAgent(JedisAgent jedisAgent) {
        this.jedisAgent = jedisAgent;
    }
}

我按照框架，在其他地方写了个类似的

protected JedisAgent jedisAgent;

 jedisAgent.jedis();

怎么是null