Jedis connect to Redis
The first step: create a project, import dependencies
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.7.2</version>
</dependency>
note:
1) Confirm whether the remote server can be pinged: ping the ip address of vm
2) Confirm whether the firewall is closed or allowed
service iptables stop
service iptables status
Step 2: Link the server
Option One
Single instance link
Jedis jedis = new Jedis(“ip地址”, 端口号);//建立链接
Core code
public static void main(String[] args) {
Jedis jedis=new Jedis("192.168.197.129",6379);
//设置值
jedis.set("java001","java工程师");
String java001 = jedis.get("java001");
System.out.println(java001);
}
Common exceptions:
solution:
The ip of the virtual machine client connection is 127.0.0.1, which means the connected machine, and other machines cannot connect. Here you need to modify the configuration file and change the connection address to the address of the virtual machine.
Modify the bind connection address in the redis.conf file and change the connection address to the ip of your own virtual machine
bind 192.168.197.129
Restart the service, Jedis can connect normally
Console printing in Idea:
Storage on the server:
Option two: connection pool
The jedis connection pool connection will be integrated later using Spring configuration files.
//1.创建连接池配置的工具类对象
JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
jedisPoolConfig.setMaxIdle(10);//jedis连接的空闲数
jedisPoolConfig.setMaxIdle(20);//总的连接数
JedisPool jedisPool = null;
Jedis jedis = null;
try{
//2.创建连接池对象
jedisPool = new JedisPool(jedisPoolConfig,"192.168.87.129",6379);
//3.获得jedis资源
jedis = jedisPool.getResource();
//4.操作数据
jedis.set("stu1","student1");
String stu1 = jedis.get("stu1");
System.out.println("stu1="+stu1);
} catch (Exception e){
e.printStackTrace();
}finally {
//关闭资源
if(jedis!=null){
jedis.close();
}
if(jedisPool!=null){
jedisPool.close();
}
}
}
Server storage confirmation:
