背景
随着Web项目的复杂程度逐渐增加,可能会涉及诸如高并发、海量资料查询的的业务场景也逐渐增多;若频繁的操作数据库,会触发数据库的I/O瓶颈,因此需要加入快取,尽量减少直接操作数据库的频率和次数;同时在分布式系统中,分布式锁等应用场景也需要依赖redis等快取数据库;redis作为nosql数据库的代表,拥有广泛的应用场景;
这里介绍下Spring集成redis,实作快取:
准备作业:
1.引入依赖;
<!-- jedis 客户端 -->
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.8.2</version>
</dependency>
<!-- spring data redis -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>1.7.11.RELEASE</version>
</dependency>
2.定义 redis.proerties
档案,配置连接池相关自变量;
# redis configuration
# 连接池配置
redis.maxTotal=30
redis.maxIdle=10
redis.softMinEvictableIdleTimeMillis=10000
redis.blockWhenExhausted=true
redis.maxWaitMillis=1500
redis.testOnBorrow=false
redis.testWhileIdle=true
redis.timeBetweenEvictionRunsMillis=30000
redis.numTestsPerEvictionRun=1024
redis.minEvictableIdleTimeMillis=180000
# 单机配置
redis.host=169.254.244.131
redis.port=6379
# 自己选择是否开启密码
redis.password=123456
# 集群配置
redis.host1=169.254.244.131
redis.port1=7001
redis.host2=169.254.244.131
redis.port2=7002
redis.host3=169.254.244.131
redis.port3=7003
redis.host4=169.254.244.131
redis.port4=7004
redis.host5=169.254.244.131
redis.port5=7005
redis.host6=169.254.244.131
redis.port6=7006
3.连接池配置引入spring背景关系中;
<!--加载属性档案-->
<bean >
<property name="locations">
<list>
<value>classpath:redis.properties</value>
</list>
</property>
<!-- 在多个spring组态档中都配置了属性档案加载 必须设定为true -->
<property name="ignoreUnresolvablePlaceholders" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/true"/>
</bean>
单机版
<?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:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 连接池配置 -->
<bean id="jedisPoolConfig" >
<!-- 最大连接数 -->
<property name="maxTotal" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.maxTotal}" />
<!-- 最大空闲连接数 -->
<property name="maxIdle" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.maxIdle}" />
<!-- 连接空闲多久后释放, 当空闲时间>该值且空闲连接>最大空闲连接数时直接释放 -->
<property name="softMinEvictableIdleTimeMillis" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.softMinEvictableIdleTimeMillis}" />
<!-- 连接用尽后,呼叫者是否需要等待 设定为true时,maxWaitMillis才会起作用 -->
<property name="blockWhenExhausted" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.blockWhenExhausted}" />
<!-- 连接用尽后,呼叫者的最大等待时间,-1表示永不超时 -->
<property name="maxWaitMillis" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.maxWaitMillis}" />
<!-- 向连接池获取连接时是否进行有效性检测,无效连接会被移除,业务量大时建议关闭 -->
<property name="testOnBorrow" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.testOnBorrow}" />
<!-- 开启空闲资源监测,建议开启 -->
<property name="testWhileIdle" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.testWhileIdle}" />
<!-- 空闲资源检测周期 -->
<property name="timeBetweenEvictionRunsMillis" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.timeBetweenEvictionRunsMillis}" />
<!-- 空闲资源检测时,每次的采样数量 设定为-1表示对所有连接做空闲检测 -->
<property name="numTestsPerEvictionRun" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.numTestsPerEvictionRun}" />
<!-- 连接池中资源最小空闲时间,达到值后空闲连接将被移除 -->
<property name="minEvictableIdleTimeMillis" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.minEvictableIdleTimeMillis}" />
</bean>
<!-- 连接工厂 -->
<bean id="jedisConnectionFactory" >
<property name="poolConfig" ref="jedisPoolConfig" />
<property name="hostName" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.host}" />
<property name="port" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.port}" />
<property name="password" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.password}" />
</bean>
<!-- redis快取 jackon序列化 -->
<bean id="redisJacksonTemplate" >
<property name="connectionFactory" ref="jedisConnectionFactory" />
<!--如果不配置Serializer,那么存盘的时候预设使用String,如果用User型别存盘,那么会提示错误User can't cast to String!! -->
<property name="keySerializer">
<bean />
</property>
<property name="valueSerializer">
<bean />
</property>
<property name="hashKeySerializer">
<bean />
</property>
<property name="hashValueSerializer">
<bean />
</property>
<!-- 事务支持 默认关闭,若开启事务,会出现错误,需要手动解决 -->
<property name="enableTransactionSupport" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/false" />
</bean>
</beans>
通过将 RedisTemplate
注入到 spring bean 中即可操作 redis;
集群版
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 连接池配置 -->
<bean id="jedisPoolConfig" >
<!-- 最大连接数 -->
<property name="maxTotal" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.maxTotal}" />
<!-- 最大空闲连接数 -->
<property name="maxIdle" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.maxIdle}" />
<!-- 连接空闲多久后释放, 当空闲时间>该值且空闲连接>最大空闲连接数时直接释放 -->
<property name="softMinEvictableIdleTimeMillis" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.softMinEvictableIdleTimeMillis}" />
<!-- 连接用尽后,呼叫者是否需要等待 设定为true时,maxWaitMillis才会起作用 -->
<property name="blockWhenExhausted" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.blockWhenExhausted}" />
<!-- 连接用尽后,呼叫者的最大等待时间,-1表示永不超时 -->
<property name="maxWaitMillis" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.maxWaitMillis}" />
<!-- 向连接池获取连接时是否进行有效性检测,无效连接会被移除,业务量大时建议关闭 -->
<property name="testOnBorrow" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.testOnBorrow}" />
<!-- 开启空闲资源监测,建议开启 -->
<property name="testWhileIdle" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.testWhileIdle}" />
<!-- 空闲资源检测周期 -->
<property name="timeBetweenEvictionRunsMillis" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.timeBetweenEvictionRunsMillis}" />
<!-- 空闲资源检测时,每次的采样数量 设定为-1表示对所有连接做空闲检测 -->
<property name="numTestsPerEvictionRun" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.numTestsPerEvictionRun}" />
<!-- 连接池中资源最小空闲时间,达到值后空闲连接将被移除 -->
<property name="minEvictableIdleTimeMillis" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.minEvictableIdleTimeMillis}" />
</bean>
<!-- 集群配置 -->
<bean id="redisClusterConfig" >
<property name="maxRedirects" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/3" />
<!-- 节点配置 -->
<property name="clusterNodes">
<set>
<bean >
<constructor-arg name="host" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.host1}" />
<constructor-arg name="port" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.port1}" />
</bean>
<bean >
<constructor-arg name="host" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.host2}" />
<constructor-arg name="port" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.port2}" />
</bean>
<bean >
<constructor-arg name="host" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.host3}" />
<constructor-arg name="port" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.port3}" />
</bean>
<bean >
<constructor-arg name="host" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.host4}" />
<constructor-arg name="port" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.port4}" />
</bean>
<bean >
<constructor-arg name="host" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.host5}" />
<constructor-arg name="port" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.port5}" />
</bean>
<bean >
<constructor-arg name="host" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.host6}" />
<constructor-arg name="port" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/${redis.port6}" />
</bean>
</set>
</property>
</bean>
<!-- 连接工厂 -->
<bean id="jedisConnectionFactory" >
<!-- 集群配置 -->
<constructor-arg index="0" ref="redisClusterConfig" />
<!-- 连接池配置 -->
<constructor-arg index="1" ref="jedisPoolConfig" />
</bean>
<!-- redis快取 jackon序列化 -->
<bean id="redisJacksonTemplate" >
<property name="connectionFactory" ref="jedisConnectionFactory" />
<!--如果不配置Serializer,那么存盘的时候预设使用String,如果用User型别存盘,那么会提示错误User can't cast to String!! -->
<property name="keySerializer">
<bean />
</property>
<property name="valueSerializer">
<bean />
</property>
<property name="hashKeySerializer">
<bean />
</property>
<property name="hashValueSerializer">
<bean />
</property>
<!-- 事务支持 默认关闭,若开启事务,会出现错误,需要手动解决 -->
<property name="enableTransactionSupport" value="https://www.cnblogs.com/herokevin/archive/2022/01/19/false" />
</bean>
</beans>
通过将 RedisTemplate
注入到 spring bean 中即可对 redis集群进行操作;
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