Jedis 2.1.0 API文档:
https://tool.oschina.net/apidocs/apidoc?api=jedis-2.1.0

Jedis 常用API整理:
https://blog.csdn.net/fanbaodan/article/details/89047909

Redis类似JDBC, Java操作Redis

在maven配置文件中添加依赖即可使用Jedis

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<dependencies>
    <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>3.2.0</version>
    </dependency>
</dependencies>

Jedis对象中两个参数, 第一个虚拟机ip地址, 第二个端口号.
如果连接失败:

  1. 请看第二篇redis配置文件, 需要的修改是否修改了.
  2. 虚拟机防火墙是否关闭了, systemctl stop firewalld
    简单示例:
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package com.wakabaka;

import redis.clients.jedis.Jedis;

import java.util.List;
import java.util.Set;

public class jedisDemo1 {

    public static void main(String[] args) {
        //创建一个Jedis对象
        Jedis jedis = new Jedis("192.168.31.65", 6379);

        //测试
        String value = jedis.ping();
        System.out.println(value);

        jedis.close();
        demol();
    }

    //操作key
    public static void demol() {
        //创建Jedis对象
        Jedis jedis = new Jedis("192.168.31.65", 6379);

        jedis.set("name", "zhangsan");

        String name = jedis.get("name");
        System.out.println(name);

        jedis.mset("k1", "v1", "k2", "v2");
        List<String> mget = jedis.mget("k1", "k2");
        System.out.println(mget);

        jedis.close();
        /*
        Set<String> keys = jedis.keys("*");
        for(String key : keys) {
            System.out.println(key);
        }
        System.out.println(jedis.exists("k1"));
        System.out.println(jedis.ttl("k1"));
        System.out.println(jedis.);
        */
    }

}

前面详细整理过的命令在Jedis都有其对应的方法.

实例:

  1. 输入手机号, 点击发送后生成6位数字, 2分钟有效
  2. 输入验证码 , 点击验证, 返回成功或失败
  3. 每个手机号每天只能输入三次
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package com.wakabaka;

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) {
        //模拟验证码发送

        verifyCode("12362171139");

        //getRedisCode("12362171139","146921");
    }

    //验证
    public static void getRedisCode(String phone, String code) {
        Jedis jedis = new Jedis("192.168.31.65", 6379);

        String codeKey = "VerifyCode" + phone + ":code";
        String redisCode = jedis.get(codeKey);
        //判断
        if(redisCode.equals(code)) {
            System.out.println("成功!");
        } else {
            System.out.println("失败!");
        }
        jedis.close();
    }

    //生成6位验证码
    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;
    }

    //让每个手机每天只能发送三次, 验证码放到redis中, 设置过期时间
    public static void verifyCode(String phone) {
        //连接redis
        Jedis jedis = new Jedis("192.168.31.65", 6379);

        //拼接key
        //手机发送次数key
        String countKey = "VerifyCode" + phone + ":count";

        //验证码key
        String codeKey = "VerifyCode" + phone + ":code";

        //每个手机每天只能发送三次
        String count = jedis.get(countKey);
        if(count == null) {
            //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 if(Integer.parseInt(count) > 2) {
            System.out.println("发送次数已达上线");
            jedis.close();
        }

        //发送的验证码放到redis中
        String vcode = getCode();
        jedis.setex(codeKey, 120, vcode);
        jedis.close();
    }
}