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网上流传着这样一种spring结合redis的例子,从jedisConnectionFactory获取Jedis实例。其他部分忽略只看RedisService,这样获取jedis实例存在很多问题。
这样每次创新新的连接而没有关闭连接。在有大量操作的时候很快就会将redis的连接都占满。报redis连接错误。
package com.mkfree.redis.test; import java.util.Set; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.data.redis.connection.jedis.JedisConnectionFactory; import redis.clients.jedis.Jedis; /** * 封装redis 缓存服务器服务接口 * @author hk * * 2012-12-16 上午3:09:18 */ public class RedisService { /** * 通过key删除(字节) * @param key */ public void del(byte [] key){ this.getJedis().del(key); } /** * 通过key删除 * @param key */ public void del(String key){ this.getJedis().del(key); } /** * 添加key value 并且设置存活时间(byte) * @param key * @param value * @param liveTime */ public void set(byte [] key,byte [] value,int liveTime){ this.set(key, value); this.getJedis().expire(key, liveTime); } /** * 添加key value 并且设置存活时间 * @param key * @param value * @param liveTime */ public void set(String key,String value,int liveTime){ this.set(key, value); this.getJedis().expire(key, liveTime); } /** * 添加key value * @param key * @param value */ public void set(String key,String value){ this.getJedis().set(key, value); } /**添加key value (字节)(序列化) * @param key * @param value */ public void set(byte [] key,byte [] value){ this.getJedis().set(key, value); } /** * 获取redis value (String) * @param key * @return */ public String get(String key){ String value = this.getJedis().get(key); return value; } /** * 获取redis value (byte [] )(反序列化) * @param key * @return */ public byte[] get(byte [] key){ return this.getJedis().get(key); } /** * 通过正则匹配keys * @param pattern * @return */ public Set<String> keys(String pattern){ return this.getJedis().keys(pattern); } /** * 检查key是否已经存在 * @param key * @return */ public boolean exists(String key){ return this.getJedis().exists(key); } /** * 清空redis 所有数据 * @return */ public String flushDB(){ return this.getJedis().flushDB(); } /** * 查看redis里有多少数据 */ public long dbSize(){ return this.getJedis().dbSize(); } /** * 检查是否连接成功 * @return */ public String ping(){ return this.getJedis().ping(); } /** * 获取一个jedis 客户端 * @return */ private Jedis getJedis(){ if(jedis == null){ return jedisConnectionFactory.getShardInfo().createResource(); } return jedis; } private RedisService (){ } //操作redis客户端 private static Jedis jedis; @Autowired @Qualifier("jedisConnectionFactory") private JedisConnectionFactory jedisConnectionFactory; }
而且没有应用连接池。如果我们想从jedisConnectionFactory获取Jedis实例又想使用连接池。可以这样:
private Jedis getJedis() { if (jedis == null) { jedisConnection = jedisConnectionFactory.getConnection(); jedis = jedisConnection.getNativeConnection(); return jedis; } return jedis; }
spring 结合 redis 正确从jedisConnectionFactory获取Jedis实例
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原文地址:http://blog.csdn.net/tiantiandjava/article/details/42913691