使用Jedis操作Redis

单机环境

使用JedisPool

package id;import redis.clients.jedis.Jedis;import redis.clients.jedis.JedisPool;import redis.clients.jedis.JedisPoolConfig;public class RedisStandAlone {    // 声明一个池    private static JedisPool pool = null;    /**     * 根据配置构建redis连接池     *     * @return JedisPool redis连接池     */    private static JedisPool getPool() {        if (pool == null) {            JedisPoolConfig config = new JedisPoolConfig();            config.setMaxIdle(20);            config.setMaxIdle(5);            config.setMaxWaitMillis(1000 * 2);            config.setTestOnBorrow(true);            pool = new JedisPool(config, "127.0.0.1", 6379);        }        return pool;    }    /**     * 回收到连接池     *     * @param pool 连接池     * @param redis 连接实例     */    private static void returnResource(JedisPool pool, Jedis redis) {        if (redis != null) {            pool.close();        }    }    /**     * 获取数据     *     * @param key 键     * @return 结果     */    public static String get(String key) {        String result = null;        JedisPool pool = null;        Jedis jedis = null;        try {            pool = getPool();            jedis = pool.getResource();            result = jedis.get(key);        } catch (Exception e) {            //释放redis对象            pool.returnBrokenResource(jedis);            e.printStackTrace();        } finally {            //返还到连接池            returnResource(pool, jedis);        }        return result;    }    /**     * 设置key的value     *     * @param key 键     * @param value 值     * @return 结果     */    public static String set(String key, String value) {        String result = "";        JedisPool pool = null;        Jedis jedis = null;        try {            pool = getPool();            jedis = pool.getResource();            result = jedis.set(key, value);        } catch (Exception e) {            //释放redis对象            pool.returnBrokenResource(jedis);            e.printStackTrace();        } finally {            //回收到连接池            returnResource(pool, jedis);        }        return result;    }}

分布式环境

使用ShardedJedisPool，在spring中注入

<!-- JEDIS连接池配置 --><bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">    <property name="maxTotal" value="20"/>    <property name="maxIdle" value="10"/>    <property name="minIdle" value="2"/>    <!--获取连接时的最大等待毫秒数(如果设置为阻塞时BlockWhenExhausted),如果超时就抛异常, 小于零:阻塞不确定的时间,  默认-1-->    <property name="maxWaitMillis" value="2000"/>    <!--在获取连接的时候检查有效性, 默认false-->    <property name="testOnBorrow" value="true"/></bean><!-- JEDIS SHARD 池配置 --><bean id="shardedJedisPool" class="redis.clients.jedis.ShardedJedisPool">    <constructor-arg index="0" ref="jedisPoolConfig"/>    <constructor-arg index="1">        <list>            <ref bean="jedis.shardInfo.default"/>        </list>    </constructor-arg></bean><!-- JEDIS SHARD 在此添加REDIS集群配置 --><bean id="jedis.shardInfo.default" class="redis.clients.jedis.JedisShardInfo">    <constructor-arg index="0" value="127.0.0.1"/>    <constructor-arg index="1" type="int" value="6379"/></bean><!-- JEDIS SHARD信息配置 -->

package id;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Component;import redis.clients.jedis.Jedis;import redis.clients.jedis.ShardedJedis;import redis.clients.jedis.ShardedJedisPool;import java.util.ArrayList;import java.util.List;import java.util.Map;/*** 分布式Redis操作工具类** @Authur 17040479*/@Component("redisUtil")public class RedisUtil {private static final Logger LOGGER = LoggerFactory.getLogger(RedisUtil.class);@Autowiredprivate ShardedJedisPool shardedJedisPool;/** * 获取redis客户端连接实例 * * @return shardJedis */public ShardedJedis getRedisClient() {    ShardedJedis shardJedis = null;    try {        shardJedis = shardedJedisPool.getResource();        return shardJedis;    } catch (Exception e) {        LOGGER.error("[JedisDS] getRedisClent error:" + e.getMessage());        if (null != shardJedis)            shardJedis.close();    }    return null;}/** * 回收实例到连接池 * * @param shardedJedis 回收实例 */public void returnResource(ShardedJedis shardedJedis) {    shardedJedis.close();}/** * 回收实例到连接池 * * @param shardedJedis 回收实例 * @param broken       是否 */public void returnResource(ShardedJedis shardedJedis, boolean broken) {    shardedJedis.close();}public String set(String key, String value) {    String result = null;    ShardedJedis shardedJedis = getRedisClient();    if (shardedJedis == null) {        return result;    }    boolean broken = false;    try {        result = shardedJedis.set(key, value);    } catch (Exception e) {        LOGGER.error(e.getMessage(), e);        broken = true;    } finally {        returnResource(shardedJedis, broken);    }    return result;}/** * 获取单个key的值 * * @param key 键 * @return 值 */public String get(String key) {    String result = null;    ShardedJedis shardedJedis = getRedisClient();    if (shardedJedis == null) {        return result;    }    boolean broken = false;    try {        result = shardedJedis.get(key);    } catch (Exception e) {        LOGGER.error(e.getMessage(), e);        broken = true;    } finally {        returnResource(shardedJedis, broken);    }    return result;}/** * 执行lua脚本 * * @param luaScript * @param key * @param val * @param expireSeconds * @return */public Object eval(final String luaScript, final String key, String val, final long expireSeconds) {    ShardedJedis shardedJedis = getRedisClient();    if (shardedJedis == null) {        throw new RuntimeException("hmset 获取redis连接失败");    }    Jedis jedis = shardedJedis.getShard(key);    boolean broken = false;    try {        // 参数KEY        List<String> keys = new ArrayList<>();        keys.add(key);        keys.add(key);        List<String> args = new ArrayList<>();        args.add(val);        args.add(String.valueOf(expireSeconds));        return jedis.eval(luaScript, keys, args);    } catch (Exception e) {        LOGGER.error(e.getMessage(), e);        broken = true;    } finally {        returnResource(shardedJedis, broken);    }    return null;}/** * setnx * * @param key * @param value * @param nx * @param px * @param expire * @return */public String setnx(String key, String value, String nx, String px, long expire) {    String result = "";    ShardedJedis shardedJedis = getRedisClient();    if (shardedJedis == null) {        return result;    }    boolean broken = false;    try {        result = shardedJedis.set(key, value, nx, px, expire);    } catch (Exception e) {        LOGGER.error(e.getMessage(), e);        broken = true;    } finally {        returnResource(shardedJedis, broken);    }    return result;}/** * del * @param key */public void del(String key) {    ShardedJedis shardedJedis = getRedisClient();    if (shardedJedis == null) {        throw new RuntimeException("del 获取redis连接失败");    }    boolean broken = false;    try {        shardedJedis.del(key);    } catch (Exception e) {        LOGGER.error(e.getMessage(), e);        broken = true;    } finally {        returnResource(shardedJedis, broken);    }}public void hmset(String key, Map<String, String> map) {    ShardedJedis shardedJedis = getRedisClient();    if (shardedJedis == null) {        throw new RuntimeException("hmset 获取redis连接失败");    }    boolean broken = false;    try {        shardedJedis.hmset(key, map);    } catch (Exception e) {        LOGGER.error(e.getMessage(), e);        broken = true;    } finally {        returnResource(shardedJedis, broken);    }}}