Redis instal

• windows安装
  https://www.cnblogs.com/piaolingzxh/p/4199999.html

• centos 安装和启动
  https://www.cnblogs.com/renzhicai/p/7773080.html

1. 安装完之后，修改配置文件，修改daemonize设置为yes，
   守护进程模式启动 redis
2. 设置requirepass huangzs
   然后启动之后，客户端连接之后， auth huangzs 就可以了
   https://www.cnblogs.com/756623607-zhang/p/6859540.html

1. redis-server redis.conf

2. spring配置密码

   <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"> <property name="hostName" value="127.0.0.1"/> <property name="port" value="6379"/> <property name="password" value="huangzs" /> <property name="database" value="0"/> <property name="poolConfig" ref="poolConfig"/> </bean>

然后 redis-cli 直接客户端接入了

Redis 集成spring

• maven 依赖

<!-- redis cache related.....start -->
	<dependency>
		<groupId>org.springframework.data</groupId>
		<artifactId>spring-data-redis</artifactId>
		<version>1.6.0.RELEASE</version>
	</dependency>
	<dependency>
		<groupId>redis.clients</groupId>
		<artifactId>jedis</artifactId>
		<version>2.7.3</version>
	</dependency>
	<!-- redis cache related.....end -->

• 配置 poolConfig、jedisConnectionFactory、redisTemplate

  <!-- redis config start --> <!-- 配置JedisPoolConfig实例 --> <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxIdle" value="${redis.maxIdle}" /> <property name="maxTotal" value="${redis.maxActive}" /> <property name="maxWaitMillis" value="${redis.maxWait}" /> <property name="testOnBorrow" value="${redis.testOnBorrow}" /> </bean> <!-- 配置JedisConnectionFactory --> <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"> <property name="hostName" value="${redis.host}"/> <property name="port" value="${redis.port}"/> <property name="database" value="${redis.dbIndex}"/> <property name="poolConfig" ref="poolConfig"/> </bean> <!-- 配置RedisTemplate --> <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"> <property name="connectionFactory" ref="jedisConnectionFactory"/> </bean>

• service层调用

  @Cacheable(value="getById") public String getById(Integer id) { return template.selectOne("com.lyz.user.mapper.UserMapper.getNameById", id); }

Redis重写keyGenerator

因为默认情况下，redis的key为 方法名拼接参数的名，例如下面的keyId 为 getByIdid1

   @Cacheable(value="getById")
public String getById(Integer id) {
	return template.selectOne("com.lyz.user.mapper.UserMapper.getNameById", id);
}

添加配置application.xml

<!-- 配置RedisCacheManager -->
<bean id="redisCacheManager" class="org.springframework.data.redis.cache.RedisCacheManager">
     <constructor-arg name="redisOperations" ref="redisTemplate" />
	<property name="defaultExpiration" value="${redis.expiration}"/>
</bean>
<!-- 配置RedisCacheConfig -->
<bean id="redisCacheConfig" class="com.lyz.cache.redis.RedisCacheConfig">
	<constructor-arg ref="jedisConnectionFactory" />
	<constructor-arg ref="redisTemplate" />
	<constructor-arg ref="redisCacheManager" />
</bean>

Redis 参考demo

https://github.com/huangzhenshi/SSM_REDIS_ANNOTATION_DEMO/tree/master
注意事项：

• 访问url 要加 *.do 如下所示
  http://localhost:8082/lyz/getUserById.do?id=1

• 开先开启redis才行啊

• mysql 数据库 创建 lyz 数据库，导入对应的初始数据，数据库 root 123456

Redis 实现session共享

注意事项： 在nginx 配置 ip_hash的话，会根据IP解决负载的问题，分析IP地址，每个用户每次都会访问同一个服务器，但是如果是内网的话，大家实际的IP是一个，所以不适合用户在一个公司，而适合真正的不同的IP地址的访问

参考demo2：
https://github.com/huangzhenshi/SSM_REDIS_ANNOTATION_DEMO/tree/master

• pom 添加依赖

  <dependency> <groupId>org.springframework.session</groupId> <artifactId>spring-session-data-redis</artifactId> <version>1.1.1.RELEASE</version> <type>pom</type> </dependency>

• application 配置里面添加管理的session Bean

  <!-- session设置 --> <bean class="org.springframework.session.data.redis.config.annotation.web.http.RedisHttpSessionConfiguration"> <property name="maxInactiveIntervalInSeconds" value="3600"></property> </bean>

• web.xml里面添加过滤，要放在最前面的位置

  <filter> <filter-name>springSessionRepositoryFilter</filter-name> <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class> </filter> <filter-mapping> <filter-name>springSessionRepositoryFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>