这个是redis分布式的工具类，看非分布式的看 这里
说一下redis的分布式，分布式，无疑，肯定不是一台redis服务器。假如说，我们有两台redis服务器，一个6379端口，一个6380端口。那么，我们存储一个数据，他会存在哪个redis服务器上呢？那我们要是取该如何取呢？这是我们需要关心的事情。
下面这个工具类，解决了你上面的困扰，他会把数据尽可能的平均分配到每个redis服务器上面。然后你获取也不用纠结哪个服务器上获取。
大体思路和上一篇单机redis差不多，无非是类不一样。
既然是分布式，肯定是需要你获取一个一个redis连接，然后搞一个List放进去，然后写上你需要的一些hash算法，选取规则什么的，这就得到了一个redisPool
看代码吧。
pom.xml
redis.clients jedis2.9.0 org.projectlombok lombok 1.16.6 org.apache.commons commons-lang3 3.5 ch.qos.logback logback-classic 1.1.2 compile ch.qos.logback logback-core 1.1.2 compile org.logback-extensions logback-ext-spring 0.1.1
RedisShardedPool.java
import redis.clients.jedis.*; import redis.clients.util.Hashing; import redis.clients.util.Sharded; import java.util.ArrayList; import java.util.List; /** * Created by 敲代码的卡卡罗特 */ public class RedisShardedPool { private static ShardedJedisPool pool;//sharded jedis连接池 private static Integer maxTotal = Integer.parseInt(PropertiesUtil.getProperty("redis.max.total","20")); //最大连接数 private static Integer maxIdle = Integer.parseInt(PropertiesUtil.getProperty("redis.max.idle","20"));//在jedispool中最大的idle状态(空闲的)的jedis实例的个数 private static Integer minIdle = Integer.parseInt(PropertiesUtil.getProperty("redis.min.idle","20"));//在jedispool中最小的idle状态(空闲的)的jedis实例的个数 private static Boolean testOnBorrow= Boolean.parseBoolean(PropertiesUtil.getProperty("redis.test.borrow","true"));//在borrow一个jedis实例的时候，是否要进行验证操作，如果赋值true。则得到的jedis实例肯定是可以用的。 private static Boolean testOnReturn= Boolean.parseBoolean(PropertiesUtil.getProperty("redis.test.return","true"));//在return一个jedis实例的时候，是否要进行验证操作，如果赋值true。则放回jedispool的jedis实例肯定是可以用的。 private static String redis1Ip = PropertiesUtil.getProperty("redis1.ip"); private static Integer redis1Port = Integer.parseInt(PropertiesUtil.getProperty("redis1.port")); private static String redis2Ip = PropertiesUtil.getProperty("redis2.ip"); private static Integer redis2Port = Integer.parseInt(PropertiesUtil.getProperty("redis2.port")); private static void initPool(){ JedisPoolConfig config = new JedisPoolConfig(); config.setMaxTotal(maxTotal); config.setMaxIdle(maxIdle); config.setMinIdle(minIdle); config.setTestOnBorrow(testOnBorrow); config.setTestOnReturn(testOnReturn); config.setBlockWhenExhausted(true);//连接耗尽的时候，是否阻塞，false会抛出异常，true阻塞直到超时。默认为true。 JedisShardInfo info1 = new JedisShardInfo(redis1Ip,redis1Port,1000*2); JedisShardInfo info2 = new JedisShardInfo(redis2Ip,redis2Port,1000*2); ListjedisShardInfoList = new ArrayList (2); jedisShardInfoList.add(info1); jedisShardInfoList.add(info2); //这就是我上面说的一些参数啥的hash算法之类的 pool = new ShardedJedisPool(config,jedisShardInfoList, Hashing.MURMUR_HASH, Sharded.DEFAULT_KEY_TAG_PATTERN); } static{ initPool(); } public static ShardedJedis getJedis(){ return pool.getResource(); } public static void close(ShardedJedis jedis){ pool.close(); } public static void main(String[] args) { ShardedJedis jedis = pool.getResource(); System.out.println(jedis.get("key1")); /*for(int i =0;i<10;i++){ jedis.set("key"+i,"value"+i); } close(jedis); // pool.destroy();//临时调用，销毁连接池中的所有连接 System.out.println("program is end");*/ } }
RedisShardedPoolUtil.java
import lombok.extern.slf4j.Slf4j; import redis.clients.jedis.ShardedJedis; /** * Created by 敲代码的卡卡罗特 */ @Slf4j public class RedisShardedPoolUtil { /** * 设置key的有效期，单位是秒 * @param key * @param exTime * @return */ public static Long expire(String key,int exTime){ ShardedJedis jedis = null; Long result = null; try { jedis = RedisShardedPool.getJedis(); result = jedis.expire(key,exTime); } catch (Exception e) { log.error("expire key:{} error",key,e); RedisShardedPool.close(jedis); return result; } RedisShardedPool.close(jedis); return result; } //exTime的单位是秒 public static String setEx(String key,String value,int exTime){ ShardedJedis jedis = null; String result = null; try { jedis = RedisShardedPool.getJedis(); result = jedis.setex(key,exTime,value); } catch (Exception e) { log.error("setex key:{} value:{} error",key,value,e); RedisShardedPool.close(jedis); return result; } RedisShardedPool.close(jedis); return result; } public static String set(String key,String value){ ShardedJedis jedis = null; String result = null; try { jedis = RedisShardedPool.getJedis(); result = jedis.set(key,value); } catch (Exception e) { log.error("set key:{} value:{} error",key,value,e); RedisShardedPool.close(jedis); return result; } RedisShardedPool.close(jedis); return result; } public static String get(String key){ ShardedJedis jedis = null; String result = null; try { jedis = RedisShardedPool.getJedis(); result = jedis.get(key); } catch (Exception e) { log.error("get key:{} error",key,e); RedisShardedPool.close(jedis); return result; } RedisShardedPool.close(jedis); return result; } public static Long del(String key){ ShardedJedis jedis = null; Long result = null; try { jedis = RedisShardedPool.getJedis(); result = jedis.del(key); } catch (Exception e) { log.error("del key:{} error",key,e); RedisShardedPool.close(jedis); return result; } RedisShardedPool.close(jedis); return result; } public static String getSet(String key,String value) { ShardedJedis jedis = null; String result = null; try { jedis = RedisShardedPool.getJedis(); result = jedis.getSet(key,value); } catch (Exception e) { log.error("getset key:{} error", key, e); RedisShardedPool.close(jedis); return result; } RedisShardedPool.close(jedis); return result; } public static Long setnx(String key, String value) { ShardedJedis jedis = null; Long result = null; try { jedis = RedisShardedPool.getJedis(); result = jedis.setnx(key, value); } catch (Exception e) { log.error("setnx key:{} value:{} error", key, value, e); RedisShardedPool.close(jedis); return result; } RedisShardedPool.close(jedis); return result; } public static void main(String[] args) { ShardedJedis jedis = RedisShardedPool.getJedis(); System.out.println(jedis.get("key1")); System.out.println("end"); } }
mmall.properties
#redis config start redis1.ip=127.0.0.1 redis1.port=6379 redis2.ip=127.0.0.1 redis2.port=6380 ##Tips：以上redis1和redis2的ip和port改成你自己的哟 #最大连接数 redis.max.total=20 #最大空闲数 redis.max.idle=10 #最小空闲数 redis.min.idle=2 #从jedis连接池获取连接时，校验并返回可用的连接 redis.test.borrow=true #把连接放回jedis连接池时，校验并返回可用的连接 redis.test.return=false #redis config end
PropertiesUtil.java
import lombok.extern.slf4j.Slf4j; import org.apache.commons.lang3.StringUtils; import java.io.IOException; import java.io.InputStreamReader; import java.util.Properties; /** * Created by 敲代码的卡卡罗特 */ @Slf4j public class PropertiesUtil { private static Properties props; static { String fileName = "mmall.properties"; props = new Properties(); try { props.load(new InputStreamReader(PropertiesUtil.class.getClassLoader().getResourceAsStream(fileName),"UTF-8")); } catch (IOException e) { log.error("配置文件读取异常",e); } } public static String getProperty(String key){ String value = props.getProperty(key.trim()); if(StringUtils.isBlank(value)){ return null; } return value.trim(); } public static String getProperty(String key,String defaultValue){ String value = props.getProperty(key.trim()); if(StringUtils.isBlank(value)){ value = defaultValue; } return value.trim(); } public static void main(String[] arg){ System.out.println(PropertiesUtil.getProperty("redis.port")); } }
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