使用Jedis

前言

藉助Jedis能夠在Java上操做Redis。

Jedis

到https://mvnrepository.com/去找jar包下載便可。
若是是maven項目：

<!-- https://mvnrepository.com/artifact/redis.clients/jedis -->
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.9.0</version>
</dependency>

獲取鏈接

Jedis jedis = new Jedis('localhost');
jedis.auth(password); // 若是設置了密碼，就須要先執行AUTH命令，不然執行其餘操做會報錯

鏈接池

JedisPoo 類是Jedis的鏈接池，能夠用 GenericObjectPoolConfig 類來設置鏈接池，這裏我用了Spring。

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

import javax.annotation.PostConstruct;

/**
 * Created by fjh on 2017/6/15.
 */
@Component
public class JedisUtils {
    private static JedisPool POOL;
    private static volatile boolean flag = false;

    @Value("${jedis.url:localhost}")
    private String url;

    @Value("${jedis.port:6379}")
    private int port;

    @Value("${jedis.timeout:1000}")
    private int timeOut;

    @Value("${jedis.auth}")
    private String auth;

    @Value("${jedis.pool.maxIdle:10}")
    private int maxIdle;

    @Value("${jedis.pool.maxTotal:100}")
    private int maxTotal;

    @Value("${jedis.pool.maxWaitMillis:10000}")
    private long maxWaitMillis;

    public static Jedis getResource() {
        return POOL.getResource();
    }

    //帶有`@PostConstruct`註解的方法會在屬性注入以後執行
    @PostConstruct
    private void init() {
        if (!flag) {
            JedisPoolConfig config = new JedisPoolConfig();
            config.setMaxIdle(maxIdle);
            config.setMaxTotal(maxTotal);
            config.setMaxWaitMillis(maxWaitMillis);
            POOL = new JedisPool(config, url, port, timeOut, auth);
            flag = true;
        }
    }
}

調用代碼：

Jedis jedis = null;
        try {
            jedis = JedisUtils.getResource();
            System.out.println(jedis.keys("*"));
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (jedis != null)
                jedis.close();
        }