使用Jedis操作Redis

一、使用Java的Jedis工具包来操作Redis的步骤:
1.导入Jedis依赖

<!--jedis-->
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.7.0</version>
</dependency>

2.操作Redis(单机)的步骤:
a.创建Jedis对象:连接redis服务器
b.通过Jedis对象操作Redis
c.关闭jedis

示例一:操作字符串类型

import redis.clients.jedis.Jedis;

public class demo {
    public static void main(String[] args) throws InterruptedException{
        //1.创建redis对象
        Jedis jedis=new Jedis("localhost",6379);
        //2.通过jedis对象操作redis键值对系统
        //设置键值
        jedis.set("name","张三");
        jedis.expire("name",60);
        Thread.sleep(10000);
        System.out.println(jedis.ttl("name"));
        //获取值
        String value=jedis.get("name");
        System.out.println("获取值是:"+value);
        jedis.close();
    }
}

实例二：操作list

import redis.clients.jedis.Jedis;

public class Demo2 {
    public static void main(String[] args) {
        Jedis jedis=new Jedis("localhost",6379);
        if ( jedis.exists("names")) {
              jedis.del("names");
        }
        jedis.lpush("names","华为","苹果","小米");
        Long len = jedis.llen("names");
        System.out.println("获取长度 = " + len);
        System.out.println("取值:"+jedis.lindex("names",0));
        for (int i = 0; i < len; i++) {
            System.out.println(jedis.lindex("names",i));
        }
    }
}