java 在方法中新建线程，传参和加锁详解

public void deleteRedisData(RedisKey redisKey){
        new Thread(new Runnable() {
            @Override
            public void run() {
                deleteRedisByRedisKey(redisKey);
            }
        }).start();
    }

    protected synchronized void deleteRedisByRedisKey(RedisKey redisKey) {
        String key = null;
        RedisKey[] keys = RedisKey.values();
        for (RedisKey key2 : keys) {
            if(redisKey.equals(key2)){
                key = key2.toString();
            }
        }
        List<User> userList = userDao.getAll();
        try {
            Jedis jedis = new Jedis();
            System.out.println("delete one");
            for (User user : userList) {
                String userId = user.getId();
                String lastKey = key.concat(userId);
                jedis.del(lastKey.getBytes());
            }
        } catch (Exception e) {
            System.out.println("缓存未连接！");
        }
    }