7、Jedis测试

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Redis 6 入门到精通-讲师：王泽

世态炎凉，世界并不善良

7、Jedis测试

7.1 Jedis所需要的jar包

<dependency>
	<groupId>redis.clientsgroupId>
	<artifactId>jedisartifactId>
	<version>3.2.0version>
dependency>
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7.2 连接Redis注意事项

1. redis.conf中注释掉bind 127.0.0.1 （不注释掉只能本机访问）
   
2. 然后将保护模式改成 protected-mode no，默认是yes，只允许本机访问，改完后重启redis。
   
3. 禁用Linux的防火墙：Linux(CentOS7)里执行命令

查看防火墙状态：systemctl status firewalld.service
关闭防火墙：systemctl stop firewalld.service

# 查看防火墙状态
[root@centos7-101 ~]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: active (running) since 六 2022-12-03 17:37:13 CST; 11s ago
     Docs: man:firewalld(1)
 Main PID: 25342 (firewalld)
    Tasks: 2
   CGroup: /system.slice/firewalld.service
           └─25342 /usr/bin/python2 -Es /usr/sbin/firewalld --nofork --nopid

12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...me.
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...me.
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
Hint: Some lines were ellipsized, use -l to show in full.
# 关闭防火墙
[root@centos7-101 ~]# systemctl stop firewalld.service
[root@centos7-101 ~]# systemctl status firewalld.service 
● firewalld.service - firewalld - dynamic firewall daemon
   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since 六 2022-12-03 17:38:21 CST; 12s ago
     Docs: man:firewalld(1)
  Process: 25342 ExecStart=/usr/sbin/firewalld --nofork --nopid $FIREWALLD_ARGS (code=exited, status=0/SUCCESS)
 Main PID: 25342 (code=exited, status=0/SUCCESS)

12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...me.
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...me.
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:37:14 centos7-101 firewalld[25342]: WARNING: COMMAND_FAILED: '/usr/sbin/iptables -w10...?).
12月 03 17:38:20 centos7-101 systemd[1]: Stopping firewalld - dynamic firewall daemon...
12月 03 17:38:21 centos7-101 systemd[1]: Stopped firewalld - dynamic firewall daemon.
Hint: Some lines were ellipsized, use -l to show in full.
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7.3 Jedis常用操作

7.3.1 创建动态的工程

7.3.2 创建测试程序

package pers.tianyu.jedis;

import redis.clients.jedis.Jedis;

public class JedisDemo1 {
    public static void main(String[] args) {
        // 创建一个jedis对象
        Jedis jedis = new Jedis("192.168.0.101",6379);
        String ping = jedis.ping();
        System.out.println(ping);
        jedis.close();
    }
}
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7.4 测试相关数据类型

7.4.1 Jedis-API：Key

// key
@Test
public void demo01() {
    // 创建一个jedis对象
    Jedis jedis = new Jedis("192.168.0.101", 6379);
    // 	添加键值对
    jedis.set("k1", "v1");
    jedis.set("k2", "v2");
    jedis.set("k3", "v3");
    Set<String> keys = jedis.keys("*");
    // 集合数量
    System.out.println(keys.size());
    for (String key : keys) {
        System.out.println(key);
    }
    // 判断某个key是否存在
    System.out.println(jedis.exists("k1"));
    // 查看还有多少秒过期，-1表示永不过期，-2表示已过期
    System.out.println(jedis.ttl("k1"));
    // 查询对应键值
    System.out.println(jedis.get("k1"));
    // 关闭
    jedis.close();
}
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7.4.2 Jedis-API：String

// string
@Test
public void demo02() {
    // 创建一个jedis对象
    Jedis jedis = new Jedis("192.168.0.101", 6379);
    // 	添加多个键值对
    jedis.mset("str1", "v1", "str2", "v2", "str3", "v3");
    // 获取多个值
    List<String> mget = jedis.mget("str1", "str2", "str3");
    System.out.println(mget);
}
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7.4.3 Jedis-API：List

// list
@Test
public void demo03() {
    // 创建一个jedis对象
    Jedis jedis = new Jedis("192.168.0.101", 6379);
    //添加键值对
    jedis.lpush("code", "a", "b", "c", "d", "e");
    //获取list集合全部值
    List<String> code = jedis.lrange("code", 0, -1);
    //循环遍历
    for (String element : code) {
        System.out.println(element);
    }
    //关闭
    jedis.close();
}
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7.4.4 Jedis-API：set

// set
@Test
public void demo04(){
    // 创建一个jedis对象
    Jedis jedis = new Jedis("192.168.0.101", 6379);
    //添加键值对
    jedis.sadd("mysql","a");
    jedis.sadd("mysql","b");
    jedis.sadd("mysql","c");
    jedis.sadd("mysql","d");
    jedis.sadd("mysql","e");
    // 取出该集合的所有值
    Set<String> mysql = jedis.smembers("mysql");
    for (String str:mysql) {
        System.out.println(str);
    }
    // 删除集合中的某个元素
    jedis.srem("mysql","a");
}
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7.4.5 Jedis-API：hash

// hash
@Test
public void demo05() {
    // 创建一个jedis对象
    Jedis jedis = new Jedis("192.168.0.101", 6379);
    // 添加键值对
    jedis.hset("user", "name", "lisi");
    // 创建一个hashmap
    HashMap<String, String> map = new HashMap<>();
    map.put("telphone", "13100002222");
    map.put("address", "har");
    map.put("email", "abc@163.com");
    // 将map添加
    jedis.hset("user", map);
    // 获取key中的多个字段值
    List<String> hmget = jedis.hmget("user", "name", "telphone", "address", "email");
    for (String element : hmget) {
        System.out.println(element);
    }
    // 关闭
    jedis.close();
}
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7.4.6 Jedis-API：zset

// zset
@Test
public void demo06() {
    // 创建一个jedis对象
    Jedis jedis = new Jedis("192.168.0.101", 6379);
    // 添加键值对
    jedis.zadd("china", 100d, "beijing");
    jedis.zadd("china", 200d, "shanghai");
    jedis.zadd("china", 300d, "guangzhou");
    jedis.zadd("china", 400d, "shenzhen");
    Set<String> china = jedis.zrange("china", 0, -1);
    for (String city : china) {
        System.out.println(city);
    }
    // 关闭
    jedis.close();
}
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