JRedis的基本操作，基本数据类型操作

news2024/11/27 17:21:14

Redis的基本数据类型：

string
hash
list
set
zset

{
    public static void main(String[] args) {
        Jedis jedis = new Jedis("127.0.0.1", 6379);
        // string
        jedis.set("hello", "word");
        String hello = jedis.get("hello");
        System.out.println(hello);
        // hash
        jedis.hset("hello:world", "version", "111");
        jedis.hset("hello:world", "name", "jedis-redis");
        Map<String, String> stringStringMap = jedis.hgetAll("hello:world");
        System.out.println(stringStringMap);
        // list
        jedis.rpush("namelist", "11", "22");
        List<String> namelist = jedis.lrange("namelist", 0, 1);
        System.out.println(namelist);
        // set
        jedis.sadd("subject", "math", "Math", "abc", "abc");
        Set<String> subject = jedis.smembers("subject");
        System.out.println(subject);
        // zset
        jedis.zadd("nums", 1, "ming");
        jedis.zadd("nums", 4, "zhang");
        jedis.zadd("nums", 2, "wang");
        Set<String> nums = jedis.zrange("nums", 0, 4);
        System.out.println(nums);

        jedis.close();
    }
}

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Jedis线程池比Jedis稳定，且易于管理。

{
    public static void main(String[] args) {
        JedisPoolConfig poolConfig = new JedisPoolConfig();
        JedisPool jedisPool = new JedisPool(poolConfig, "127.0.0.1", 6379, 20000);
        Jedis jedis = null;
        try{
            jedis = jedisPool.getResource();
            jedis.set("pool", "jeditpool");
            String result = jedis.get("pool");
            System.out.println(result);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            assert jedis != null;
            jedis.close();
        }
    }
}

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JedisPool的Jedis对象最多默认为8个

package com.codeiteasy.service;

import org.springframework.stereotype.Service;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

import java.time.Duration;
import java.util.concurrent.atomic.AtomicInteger;

@Service
public class JedisPoolService {
    public static void main(String[] args) throws InterruptedException {
        JedisPoolConfig poolConfig = new JedisPoolConfig();
        poolConfig.setMaxWait(Duration.ofSeconds(2));
        JedisPool jedisPool = new JedisPool(poolConfig, "127.0.0.1", 6379, 20000);


        AtomicInteger atom = new AtomicInteger(0);
        for (int i = 0; i < 15; i++) {
            Thread t1 = new Thread(() -> {
                try{
                    Jedis jedis = null;
                    jedis = jedisPool.getResource();
                    jedis.set("pool", "jeditpool");
                    String result = jedis.get("pool");
                    int x = atom.incrementAndGet();
                    System.out.println(result+x);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            });
            t1.start();
            t1.join();
        }
    }
}

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更改用后关闭

package com.codeiteasy.service;

import org.springframework.stereotype.Service;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

import java.time.Duration;
import java.util.concurrent.atomic.AtomicInteger;

@Service
public class JedisPoolService {
    public static void main(String[] args) throws InterruptedException {
        JedisPoolConfig poolConfig = new JedisPoolConfig();
        poolConfig.setMaxWait(Duration.ofSeconds(2));
        JedisPool jedisPool = new JedisPool(poolConfig, "127.0.0.1", 6379, 20000);


        AtomicInteger atom = new AtomicInteger(0);
        for (int i = 0; i < 15; i++) {
            Thread t1 = new Thread(() -> {
                Jedis jedis = null;
                try{

                    jedis = jedisPool.getResource();
                    jedis.set("pool", "jeditpool");
                    String result = jedis.get("pool");
                    int x = atom.incrementAndGet();
                    System.out.println(result+x);
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    jedis.close();
                }
            });
            t1.start();
            t1.join();
        }
    }
}