获取Redis里的所有key-value对

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    public static void main(String[] args) {
        long start = System.currentTimeMillis();

        //连接redis服务器，localhost:6379
        Jedis redis = new Jedis("localhost", 6379);
        // 获取所有key
        Set keySet = redis.keys("*".getBytes());
        byte[][] keys = keySet.toArray(new byte[keySet.size()][]);
        // 获取所有value
        byte[][] values = redis.mget(keys).toArray(new byte[keySet.size()][]);

        // 打印key-value对
        for (int i = 0; i < keySet.size(); ++i) {
            System.out.println(byte2hex(keys[i]) + " --- " + byte2hex(values[i]));
        }

        long end = System.currentTimeMillis();
        // 计算耗时
        System.out.println("Query " + values.length + " pairs takes " + (end - start) + " millis");
        redis.close();
    }

    private static String byte2hex(byte[] buffer) {
        String h = "0x";

        for (byte aBuffer : buffer) {
            String temp = Integer.toHexString(aBuffer & 0xFF);
            if (temp.length() == 1) {
                temp = "0" + temp;
            }
            h = h + " " + temp;
        }

        return h;

    }