ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-redis.xml");

        RedisTemplate redisTemplate = applicationContext.getBean(RedisTemplate.class);

        //设值

        redisTemplate.opsForValue().set("key1","value1");

        redisTemplate.opsForValue().set("key2","value2");

        //取值

        String value1 = (String) redisTemplate.opsForValue().get("key1");

        System.out.println(value1);

        //删除

        redisTemplate.delete("key1");

        //求长度

        Long size = redisTemplate.opsForValue().size("key2");

        System.out.println(size);

        //设新值返回旧值

        String oldValue2 = (String) redisTemplate.opsForValue().getAndSet("key2","new_Value2");

        System.out.println(oldValue2);

        //求子字符串

        String rangeValue2 = redisTemplate.opsForValue().get("key2", 0, 3);

        System.out.println(rangeValue2);

        //追加字符串到末尾，返回新字符串长度

        int newLen = redisTemplate.opsForValue().append("key2","_app");

        System.out.println(newLen);

        System.out.println(redisTemplate.opsForValue().get("key2"));