service iptables stop   命令关闭防火墙，但是系统重启后会开启

 chkconfig iptables off--关闭防火墙开机自启动

<project xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.cyb</groupId>
    <artifactId>RedisDemo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.9.0</version>
        </dependency>
    </dependencies>
</project>

    public static void singleConnect() {
        //jedis单实例连接
        Jedis jedis=new Jedis("192.168.31.200", 6379);
        String result= jedis.get("k2");
        System.out.println(result);
        jedis.close();
    }
    public static void poolConnect() {
        //jedis连接池
        JedisPool pool=new JedisPool("192.168.31.200", 6379);
        Jedis jedis=pool.getResource();
        String result= jedis.get("k2");
        System.out.println(result);
        jedis.close();
        pool.close();
    }