最近學習使用Spring + Redis存取數據，版本是2.9.0。String，Map都可存入redis，并設置時效性。

pom.xml

<dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-context-support</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-instrument</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-orm</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-tx</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>4.2.5.RELEASE</version> </dependency> <dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>2.9.0</version> </dependency> <dependency><groupId>org.springframework.data</groupId><artifactId>spring-data-redis</artifactId><version>1.6.1.RELEASE</version> </dependency>

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redis.properties

#IP redis.host=127.0.0.1 #端口 redis.port=6379 #密碼 redis.password=0 #超時，單位毫秒 redis.timeout=10000 #最大空閑數 redis.maxIdle=300 #最大連接數 redis.maxTotal=600 #最大空閑數 redis.minIdle=1 #最大建立連接等待時間 redis.maxWait=1000 #指明是否在從池中取出連接前進行檢驗,如果檢驗失敗,則從池中去除連接并嘗試取出另一個 redis.testOnBorrow=false #使用redis塊分區,0-15 redis.database=0

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Spring-redis.properties

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx"xmlns:jpa="http://www.springframework.org/schema/data/jpa" xmlns:mongo="http://www.springframework.org/schema/data/mongo"xmlns:util="http://www.springframework.org/schema/util" xmlns:redis="http://www.springframework.org/schema/redis"xsi:schemaLocation="http://www.springframework.org/schema/data/mongo http://www.springframework.org/schema/data/mongo/spring-mongo-1.8.xsdhttp://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsdhttp://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsdhttp://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd" default-lazy-init="true"><description>Redis連接配置文件</description><context:annotation-config /><!-- 注解掃描包 --> <context:component-scan base-package="com.nuanshui" ><context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" /></context:component-scan><!-- 引入配置文件 --><bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="fileEncoding" value="utf-8" /><property name="locations"><list><value>classpath*:/config/properties/*.properties</value></list></property></bean><!-- jedis 配置 --><bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig"><property name="maxIdle" value="${redis.maxIdle}" /><property name="maxWaitMillis" value="${redis.maxWait}" /><property name="testOnBorrow" value="${redis.testOnBorrow}" /></bean><bean id="redisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"><property name="poolConfig" ref="poolConfig" /><property name="port" value="${redis.port}" /><property name="hostName" value="${redis.host}" /><property name="password" value="${redis.password}" /><property name="timeout" value="${redis.timeout}" /><property name="database" value="${redis.database}" /></bean><bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate"><property name="connectionFactory" ref="redisConnectionFactory" /><!-- 將key和value序列化后存入redis，讀取時再進行反序列化 --><!-- 對key的默認序列化器 --><property name="keySerializer"><bean class="org.springframework.data.redis.serializer.StringRedisSerializer" /></property><!-- 對value的默認序列化器 --><property name="valueSerializer"><bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/></property><!-- 對hash結構數據的hashkey的默認序列化器 --><property name="hashKeySerializer"><bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer" /></property><!-- 對hash結構數據的hashvalue的默認序列化器 --><property name="hashValueSerializer"><bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer" /></property></bean></beans>

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RedisService.java

package com.test.service.redis;import java.util.Map; import java.util.concurrent.TimeUnit;import javax.annotation.Resource;import org.springframework.data.redis.core.HashOperations; import org.springframework.data.redis.core.StringRedisTemplate; import org.springframework.stereotype.Service;@Service public class RedisService {//配置文件中注入SpringRedisTemplate@Resourceprivate StringRedisTemplate redisTemplate;/*** 刪除key和value*/public void delete(String key){redisTemplate.delete(key);}/*** 根據key獲取value*/public String get(String key){String value = redisTemplate.opsForValue().get(key);return value;}/*** 將key和value存入redis，并設置有效時間，單位：天*/public void set(String key, String value, long timeout){redisTemplate.opsForValue().set(key, value, timeout, TimeUnit.DAYS);}/*** 將key和value存入redis*/public void set(String key, String value){redisTemplate.opsForValue().set(key, value);}/*** 從redis中獲取map*/public Map<String, Object> getMap(String key){HashOperations<String, String, Object> hash = redisTemplate.opsForHash();Map<String,Object> map = hash.entries(key);return map;}/*** 將map存入redis，并設置時效*/public void set(String key, Map<? extends String, ? extends Object> map, long timeout){redisTemplate.opsForHash().putAll(key, map);redisTemplate.expire(key, timeout, TimeUnit.DAYS);} }

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Controller

package com.test.web;import javax.annotation.Resource;import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody;import com.nuanshui.service.redis.RedisService;import redis.clients.jedis.Jedis;@Controller @RequestMapping("/test") public class HelloController {@Resourceprivate RedisService redisService;@RequestMapping(value="/getRedis")@ResponseBodypublic String getJson(String string) throws Exception {redisService.set("test", "test");String value = redisService.get("test");System.out.println(value);return null;}}

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個人使用Redis感覺有以下幾點好處：?
1、基于內存可高速讀取，高并發特性，能抗住大型系統訪問的峰值；?
2、存取一些過渡數據，設置數據有效時間，超時數據失效；?
3、設置分區，可供多個小型系統使用；?
4、redis集群實現讀寫分離。

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