引入依赖

<!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>4.2.1</version>
</dependency>

Jedis连接Redis

需要打开阿里云的防火墙，6379端口。
修改配置文件

1. protected-mode no，改成no
2. #bind 127.0.0.1 -::1，注释了

然后用jedis测试链接

    public static void main(String[] args) {
        //创建Jedis对象
        Jedis jedis = new Jedis("xxx.xxx.xxx.xxx",6379);
        jedis.auth("xxxxxx");
        //测试
        String ping = jedis.ping();
        System.out.println(ping);
    }

简单测试

很多方法，在前面的文章，数据类型的常用命令里面都有，用法都一样的，可以照猫画虎的去用。这里就不一一演示了

    public static void main(String[] args) {
        //创建Jedis对象
        Jedis jedis = new Jedis("xxx.xxx.xxx.xxx",6379);
        jedis.auth("xxxxxx");
        //获取所有的key
        Set<String> keys = jedis.keys("*");
        for(String key:keys){
            System.out.println(key);
        }
        //添加
        jedis.set("name","张三");
        //获取
        String name = jedis.get("name");
        System.out.println(name);
        //设置多个key-value
        jedis.mset("k01","v1","k02","v2");
        //获取多个值
        List<String> keys2 = jedis.mget("k01", "k02");
        for (String key:keys2){
            System.out.println(key);
        }
    }

测试实例：模拟手机验证码

package com.lyd.jedis;
import redis.clients.jedis.Jedis;
import java.util.List;
import java.util.Random;
import java.util.Set;
public class JedisDemo1 {
    public static void main(String[] args) {
        //模拟验证码的发送
        String code = verifyCode("18899988888");
        System.out.println(code);
        getRedisCode("18899988888","233456");
    }
    //3.验证码校验
    public static void getRedisCode(String phone,String code){
        //从redis中获取验证码
        //创建Jedis对象
        Jedis jedis = new Jedis("xxx.xxx.xxx.xxx",6379);
        jedis.auth("xxxxxx");
        //验证码的key
        String codeKey ="VerifyCode"+phone+":code";
        String coder = jedis.get(codeKey);
        //判断
        if(coder.equals(code)){
            System.out.println("成功");
        }else {
            System.out.println("失败");
        }
        jedis.close();
    }
    //2.每个手机每天只能发送3次，验证码放到redis中，设置过期时间
    public static String verifyCode(String phone){
        //创建Jedis对象
        Jedis jedis = new Jedis("xxx.xxx.xxx.xxx",6379);
        jedis.auth("xxxxxx");
        //手机发送次数key
        String countKey = "VerifyCode"+phone+":count";
        //验证码的key
        String codeKey ="VerifyCode"+phone+":code";
        //每个手机每天只能发三次
        String count = jedis.get(countKey);
        if(count==null){
            //没有发送次数，第一次发送
            //设置发送次数为1
            jedis.setex(countKey,24*60*60,"1");
        }else if(Integer.parseInt(count)<=2){
            //发送次数+1
            jedis.incr(countKey);
        }
        else {
            //发送三次，不能发送了
            System.out.println("今天已经发送超过3次了");
            jedis.close();
            return null;
        }
        //发送的验证码要放到redis里面
        String vcode = getCode();
        jedis.setex(codeKey,120,vcode);
        jedis.close();
        return vcode;
    }
    //1.生成6位数据验证码
    public static String getCode(){
        Random random = new Random();
        String code="";
        for(int i =0;i<6;i++){
            int rand = random.nextInt(10);
            code+=rand;
        }
        return code;
    }
}