java操作Redis

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需要使用如下jar包
　　　　<!-- https://mvnrepository.com/artifact/redis.clients/jedis -->        <dependency>            <groupId>redis.clients</groupId>            <artifactId>jedis</artifactId>            <version>2.8.1</version>        </dependency>        <!-- https://mvnrepository.com/artifact/commons-pool/commons-pool -->        <dependency>            <groupId>commons-pool</groupId>            <artifactId>commons-pool</artifactId>            <version>1.6</version>        </dependency>

 

 

1.建立串連池

 

package com.spring.wzy;import redis.clients.jedis.Jedis;import redis.clients.jedis.JedisPool;import redis.clients.jedis.JedisPoolConfig;public class JedisPoolUtil {        /**     * 雙重鎖形式的單例     * */    private static volatile JedisPool jedisPool = null;            private JedisPoolUtil(){}        public static JedisPool getJedisPoolInstance(){        if(null == jedisPool){            synchronized (JedisPoolUtil.class) {                if(null == jedisPool){                //    GenericObjectPoolConfig poolConfig = new JedisPoolConfig();                    JedisPoolConfig poolConfig = new JedisPoolConfig();                   // poolConfig.setMaxActive(1000);//最大執行個體數                    poolConfig.setMaxWaitMillis(100*1000);//最大等待時間                    poolConfig.setMaxIdle(50);//最多空閑執行個體                    poolConfig.setTestOnBorrow(true);//獲得一個執行個體時檢查串連可用性                    jedisPool = new JedisPool(poolConfig, "192.168.23.128", 6379);                }            }        }        return jedisPool;    }        public static void release(JedisPool jedisPool, Jedis jedis){        if(null != jedis){            //jedis.close();            jedisPool.returnResourceObject(jedis);        }    }}

2.使用執行個體

 

public static void main(String[] args) throws InterruptedException {        JedisPool jedisPool = JedisPoolUtil.getJedisPoolInstance();        Jedis j = null;        try{             j = jedisPool.getResource();    //        j.select(0);//選中資料庫，預設是0號庫//        j.flushAll();//清空資料庫        //        j.del("key"); //刪除key    //        j.set("k1", "v1");//        j.set("k2", "v2");//        j.set("k2", "v3");//新值會把舊值覆蓋        //        System.out.println(j.exists("k2"));//返回ture/false//        System.out.println(j.exists("k1","k3"));//返回存在的個數        //        System.out.println(new String(j.get("k1".getBytes())));//        System.out.println(j.get("k2"));        //        Set<String> keys = j.keys("*");//        for(String k:keys){//            System.out.println(k);//        }        //        j.move("k1", 2);//把k1剪下到2號庫        //        System.out.println(j.expire("k2", 10));//設定key的存活時間（s），執行成功返回1，否則返回0//        Thread.sleep(3000);//        System.out.println(j.ttl("k2"));//查看key的到期時間                }catch (Exception e) {            e.printStackTrace();        }finally{            JedisPoolUtil.release(jedisPool, j);        }

 

java操作Redis