RedisTemplate配置：https://www.cnblogs.com/weibanggang/p/10188682.html

package com.wbg.springRedis.test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.data.redis.core.RedisTemplate;

public class
 
 TestCal {

     static RedisTemplate redisTemplate = null;
    public static void main(String[] args) {
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-redis.xml");
         redisTemplate = applicationContext.getBean(RedisTemplate.class);
        //設值
        redisTemplate.opsForValue().set("i", "10");
        print();
        
 
//加1
        redisTemplate.getConnectionFactory().getConnection().incr(
                redisTemplate.getKeySerializer().serialize("i")
        );
        //加4
        redisTemplate.getConnectionFactory().getConnection().incrBy(
                redisTemplate.getKeySerializer().serialize("i"), 4
        );
        print();
        
 
//
        //減1
        redisTemplate.getConnectionFactory().getConnection().decr(
                redisTemplate.getKeySerializer().serialize("i")
        );
        //減4
        redisTemplate.getConnectionFactory().getConnection().decrBy(
                redisTemplate.getKeySerializer().serialize("i"), 4
        );
        print();
        print();

        //加2.3 increment是float型別
        redisTemplate.opsForValue().increment("i",2.3);
        print();
    }
    //列印
    public static void print(){
        System.out.println(redisTemplate.opsForValue().get("i"));
    }

}