Redis---02Redis的Java客户端

一、注意

　　连接Linux里面安装的Redis，需要执行以下步骤：

　　①禁用防火墙（CentOS 7）：systemctl stop firewalld.service

　　②在redis.conf中注释掉 bind 127.0.0.1 ,然后 protect-mode no

二、Java使用

　　1.导入Jedis-2.1.0.jar

　　2.编写代码：

package com.jenne.redis;

import org.junit.Before;
import org.junit.Test;
import redis.clients.jedis.Jedis;

import java.util.*;

public class RedisDemo01 {
    Jedis jedis;

    @Before
    public void init() {
        //连接本地的 Redis 服务
        jedis = new Jedis("192.168.7.128", 6379);
    }

    @Test
    public void testPing() {
        init();
        //查看服务是否运行，打出pong表示OK
        System.out.println("connection is OK==========>: " + jedis.ping());
    }

    @Test
    public void testKey() {
        Set<String> keys = jedis.keys("*");
        for (Iterator iterator = keys.iterator(); iterator.hasNext(); ) {
            String key = (String) iterator.next();
            System.out.println(key);
        }
        System.out.println("jedis.exists====>" + jedis.exists("k2"));
        System.out.println(jedis.ttl("k1"));

    }

    @Test
    public void testString() {
        System.out.println(jedis.get("k1"));
        jedis.set("k4", "k4_Redis");
        System.out.println("----------------------------------------");
        jedis.mset("str1", "v1", "str2", "v2", "str3", "v3");
        System.out.println(jedis.mget("str1", "str2", "str3"));
    }

    @Test
    public void testList() {
        List<String> list = jedis.lrange("mylist", 0, -1);
        for (String element : list) {
            System.out.println(element);
        }
    }

    @Test
    public void testSet() {
        jedis.sadd("orders", "jd001");
        jedis.sadd("orders", "jd002");
        jedis.sadd("orders", "jd003");
        Set<String> set1 = jedis.smembers("orders");
        for (Iterator iterator = set1.iterator(); iterator.hasNext(); ) {
            String string = (String) iterator.next();
            System.out.println(string);
        }
        jedis.srem("orders", "jd002");
    }

    @Test
    public void testHash() {
        jedis.hset("hash1", "userName", "lisi");
        System.out.println(jedis.hget("hash1", "userName"));
        Map<String, String> map = new HashMap<String, String>();
        map.put("telphone", "13810169999");
        map.put("address", "atguigu");
        map.put("email", "abc@163.com");
        jedis.hmset("hash2", map);
        List<String> result = jedis.hmget("hash2", "telphone", "email");
        for (String element : result) {
            System.out.println(element);
        }
    }

    @Test
    public void testZset() {
        jedis.zadd("zset01", 60d, "v1");
        jedis.zadd("zset01", 70d, "v2");
        jedis.zadd("zset01", 80d, "v3");
        jedis.zadd("zset01", 90d, "v4");
        Set<String> s1 = jedis.zrange("zset01", 0, -1);
        for (Iterator iterator = s1.iterator(); iterator.hasNext(); ) {
            String string = (String) iterator.next();
            System.out.println(string);
        }
    }
}

三、Redis连接池使用

　　1.导入commons-pool2-2.4.2.jar

　　2.编写代码：

package com.jenne.redis;

import org.junit.Before;
import org.junit.Test;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

public class RedisDemo02 {
    JedisPool jedisPool;
    Jedis jedis;

    @Before
    public void init() {
        //设置到JedisPoolConfig中
        JedisPoolConfig config = new JedisPoolConfig();
        config.setMaxTotal(50);
        config.setMaxIdle(10);

        //初始化JedisPool
        jedisPool = new JedisPool(config, "192.168.7.128", 6379);
        jedis = jedisPool.getResource();
    }

    @Test
    public void testPool() {
        String ping = jedis.ping();
        System.out.println(ping);
    }
}