<Redis> 入门四 Jedis操作Redis

pom依赖

    <dependencies>
        <!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.9.0</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

连接池管理类

package org.maple.redis;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

/**
 * @author mapleins
 * @Date 2018-12-24 16:58
 * @Desc 连接池管理
 **/
public class RedisManager {

    private static JedisPool jedisPool;

    static {
        JedisPoolConfig jedisPoolConfig = new JedisPoolConfig();
        //设置连接参数，有很多方法
        jedisPoolConfig.setMaxTotal(10);
        jedisPoolConfig.setMaxIdle(10);
        jedisPool = new JedisPool(jedisPoolConfig,"192.168.0.110",6379);
    }

    public static Jedis getJedis() throws Exception {
        if(null!=jedisPool){
            Jedis jedis = jedisPool.getResource();
            jedis.auth("123456");
            return jedis;
        }else {
            throw new Exception("is not init");
        }
    }
}

基本操作和之前redis命令差不多，就不过多演示了

package org.maple.string;

import org.junit.Test;
import org.maple.redis.RedisManager;
import redis.clients.jedis.Jedis;

/**
 * @author mapleins
 * @Date 2018-12-24 17:06
 * @Desc string测试
 **/
public class StringTest {

    private Jedis jedis = RedisManager.getJedis();

    public StringTest() throws Exception {
    }

    @Test
    public void test1() throws Exception {
        //1.设置指定的key value
        jedis.set("name", "jack");
        //2.获取指定的key的value
        String name = jedis.get("name");
        System.out.println("获取的值为:" + name);
        //3.获取截取的字符串
        String trim = jedis.getrange("name", 0, 0);
        System.out.println("截取的值为：" + trim);
        //4.设置指定的key,value 返回旧的value,如果没有旧value，返回(nil),并设置key value
        String oldName = jedis.set("name", "rose");
        System.out.println("旧的name:" + oldName);
        System.out.println("新的name:" + jedis.get("name"));

    }
}