Jedis第一个Demo

Posted 2020-10-03

 1 package com.test.jedis;
 2 
 3 import org.junit.Test;
 4 
 5 import redis.clients.jedis.Jedis;
 6 import redis.clients.jedis.JedisPool;
 7 import redis.clients.jedis.JedisPoolConfig;
 8 
 9 public class JedisTest {
10     @Test
11     public void testJedis() {
12         Jedis jedis = new Jedis("192.168.1.107", 6379);
13         jedis.set("name", "admin");
14         String name = jedis.get("name");
15         System.out.println("name:" + name);
16         jedis.close();
17     }
18 
19     @Test
20     public void testJedisPool() {//使用连接池方式
21 
22         JedisPoolConfig config = new JedisPoolConfig();
23         config.setMaxIdle(23);
24         config.setMaxTotal(100);
25 
26         JedisPool pool = new JedisPool(config, "192.168.1.107", 6379);
27         Jedis jedis = null;
28         try {
29             jedis = pool.getResource();
30             jedis.set("name", "wakaka");
31             String name = jedis.get("name");
32             System.out.println("#name:" + name);
33         } catch (Exception e) {
34             e.printStackTrace();
35         } finally {
36             if (jedis != null) {
37                 jedis.close();
38             }
39             if (pool != null) {
40                 pool.close();
41             }
42         }
43 
44     }
45 
46 }

首次运行报错：connectTimeOut连接数据库超时，检查了一下，虚拟机中centos7的Redis的端口被防火墙过滤了。

解决方法：

1.将6379端口加入白名单

vi /etc/sysconfig/iptables

# sample configuration for iptables service
# you can edit this manually or use system-config-firewall
# please do not ask us to add additional ports/services to this default configuration
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 6379 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT

红色字部分为新加入的部分，即

-A INPUT -p tcp -m state --state NEW -m tcp --dport 6379 -j ACCEPT

2.重启服务

service iptables restart

3.Windows的cmd打开,测试192.168.1.107的6379端口

telnet 192.168.1.107 6379

如果显示连接成功，--->END

如果显示连接失败，请继续往下看步骤4

4.检查192.168.1.107中Redis的配置文件

vi redis.conf

找到bind 127.0.0.1修改为192.168.1.107。

再次回到步骤3，测试成功-->END

 

正在学习Redis，记作笔记，有误请指出。谢谢