Redis安装与使用
第一步当然是安装Redis，这里以Windows上的安装为例。
首先下载Redis,可以选择msi或zip包安装方式
zip方式需打开cmd窗口，在解压后的目录下运行redis-server redis.windows.conf启动Redis
采用msi方式安装后Redis默认启动，不需要进行任何配置
可以在redis.windows.conf文件中修改Redis端口号、密码等配置，修改完成后使用redis-server redis.windows.conf命令重新启动
在Redis安装目录下执行redis-cli -h 127.0.0.1 -p 6379 -a 密码打开Redis操作界面
如果报错(error) ERR operation not permitted，使用auth 密码进行验证
SSM整合Redis
这里直接在上一篇SSM之框架整合的基础上进行Redis整合，这里需要注意，存入Redis的pojo类必须实现Serializable接口。
配置pom.xml引入Redis依赖
<!--redis--><dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.6.1.RELEASE</version></dependency><dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.7.3</version></dependency>
redis.properties
redis.host=127.0.0.1redis.port=6379redis.password=redisredis.maxIdle=100redis.maxWait=1000redis.testOnBorrow=trueredis.timeout=100000defaultCacheExpireTime=3600
applicationContext-redis.xml
<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.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"> <!--引入Redis配置文件--> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:redis.properties</value> </list> </property> </bean> <!-- jedis 连接池配置 --> <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxIdle" value="${redis.maxIdle}"/> <property name="maxWaitMillis" value="${redis.maxWait}"/> <property name="testOnBorrow" value="${redis.testOnBorrow}"/> </bean> <!-- redis连接工厂 --> <bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"> <property name="poolConfig" ref="poolConfig"/> <property name="port" value="${redis.port}"/> <property name="hostName" value="${redis.host}"/> <property name="password" value="${redis.password}"/> <property name="timeout" value="${redis.timeout}"></property> </bean> <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"> <property name="connectionFactory" ref="connectionFactory"/> <property name="keySerializer"> <bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/> </property> <property name="valueSerializer"> <bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/> </property> </bean> <!-- 缓存拦截器配置 --> <bean id="methodCacheInterceptor" class="com.zkh.interceptor.MethodCacheInterceptor"> <property name="redisUtil" ref="redisUtil"/> <property name="defaultCacheExpireTime" value="${defaultCacheExpireTime}"/> <!-- 禁用缓存的类名列表 --> <property name="targetNamesList"> <list> <value></value> </list> </property> <!-- 禁用缓存的方法名列表 --> <property name="methodNamesList"> <list> <value></value> </list> </property> </bean> <bean id="redisUtil" class="com.zkh.util.RedisUtil"> <property name="redisTemplate" ref="redisTemplate"/> </bean> <!--配置切面拦截方法 --> <aop:config proxy-target-class="true"> <aop:pointcut id="controllerMethodPointcut" expression=" execution(* com.zkh.service.impl.*.select*(..))"/> <aop:advisor advice-ref="methodCacheInterceptor" pointcut-ref="controllerMethodPointcut"/> </aop:config></beans>
MethodCacheInterceptor.java
package com.zkh.interceptor;import com.zkh.util.RedisUtil;import org.aopalliance.intercept.MethodInterceptor;import org.aopalliance.intercept.MethodInvocation;import java.util.List;/** * Redis缓存过滤器 */public class MethodCacheInterceptor implements MethodInterceptor { private RedisUtil redisUtil; private List<String> targetNamesList; // 禁用缓存的类名列表 private List<String> methodNamesList; // 禁用缓存的方法列表 private String defaultCacheExpireTime; // 缓存默认的过期时间 @Override public Object invoke(MethodInvocation invocation) throws Throwable { Object value = null; String targetName = invocation.getThis().getClass().getName(); String methodName = invocation.getMethod().getName(); if (!isAddCache(targetName, methodName)) { // 跳过缓存返回结果 return invocation.proceed(); } Object[] arguments = invocation.getArguments(); String key = getCacheKey(targetName, methodName, arguments); try { // 判断是否有缓存 if (redisUtil.exists(key)) { return redisUtil.get(key); } // 写入缓存 value = invocation.proceed(); if (value != null) { final String tkey = key; final Object tvalue = value; new Thread(new Runnable() { @Override public void run() { redisUtil.set(tkey, tvalue, Long.parseLong(defaultCacheExpireTime)); } }).start(); } } catch (Exception e) { e.printStackTrace(); if (value == null) { return invocation.proceed(); } } return value; } /** * 是否加入缓存 * * @return */ private boolean isAddCache(String targetName, String methodName) { boolean flag = true; if (targetNamesList.contains(targetName) || methodNamesList.contains(methodName) || targetName.contains("$$EnhancerBySpringCGLIB$$")) { flag = false; } return flag; } /** * 创建缓存key * * @param targetName * @param methodName * @param arguments */ private String getCacheKey(String targetName, String methodName, Object[] arguments) { StringBuffer sbu = new StringBuffer(); sbu.append(targetName).append("_").append(methodName); if ((arguments != null) && (arguments.length != 0)) { for (int i = 0; i < arguments.length; i++) { sbu.append("_").append(arguments[i]); } } return sbu.toString(); } public void setRedisUtil(RedisUtil redisUtil) { this.redisUtil = redisUtil; } public void setTargetNamesList(List<String> targetNamesList) { this.targetNamesList = targetNamesList; } public void setMethodNamesList(List<String> methodNamesList) { this.methodNamesList = methodNamesList; } public void setDefaultCacheExpireTime(String defaultCacheExpireTime) { this.defaultCacheExpireTime = defaultCacheExpireTime; }}
RedisUtil.java 工具类
package com.zkh.util;import org.apache.log4j.Logger;import org.springframework.data.redis.core.RedisTemplate;import org.springframework.data.redis.core.ValueOperations;import java.io.Serializable;import java.util.Set;import java.util.concurrent.TimeUnit;/** * Redis工具类 */public class RedisUtil { private RedisTemplate<Serializable, Object> redisTemplate; /** * 批量删除对应的value * * @param keys */ public void remove(final String... keys) { for (String key : keys) { remove(key); } } /** * 批量删除key * * @param pattern */ public void removePattern(final String pattern) { Set<Serializable> keys = redisTemplate.keys(pattern); if (keys.size() > 0) redisTemplate.delete(keys); } /** * 删除对应的value * * @param key */ public void remove(final String key) { if (exists(key)) { redisTemplate.delete(key); } } /** * 判断缓存中是否有对应的value * * @param key * @return */ public boolean exists(final String key) { return redisTemplate.hasKey(key); } /** * 读取缓存 * * @param key * @return */ public Object get(final String key) { Object result = null; ValueOperations<Serializable, Object> operations = redisTemplate .opsForValue(); result = operations.get(key); return result; } /** * 写入缓存 * * @param key * @param value * @return */ public boolean set(final String key, Object value) { boolean result = false; try { ValueOperations<Serializable, Object> operations = redisTemplate .opsForValue(); operations.set(key, value); result = true; } catch (Exception e) { e.printStackTrace(); } return result; } /** * 写入缓存 * * @param key * @param value * @return */ public boolean set(final String key, Object value, Long expireTime) { boolean result = false; try { ValueOperations<Serializable, Object> operations = redisTemplate .opsForValue(); operations.set(key, value); redisTemplate.expire(key, expireTime, TimeUnit.SECONDS); result = true; } catch (Exception e) { e.printStackTrace(); } return result; } public void setRedisTemplate( RedisTemplate<Serializable, Object> redisTemplate) { this.redisTemplate = redisTemplate; }}
效果展示
刚开始Redis中没有任何记录，接下来访问一下第一页记录
再查看缓存，记录已经存如Redis，并且第一次访问会从Mysql中读取数据
按F5刷新页面，从Tomcat控制台可以看到没有进行SQL查询，而是直接从Redis中读取缓存数据，减轻了数据库的负担
以上就是Java中关于SSM之整合Redis的详解的详细内容，更多请关注其它相关文章！
不能接受失败，也意味太想去成功了，从心理学上解释，
