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();
        }
    }