Maven整合SSM和Redis，親測
Maven、SSM整合Redis
Maven和SSM的搭建這裡就不說了，主要寫Maven、SSM如何整合Redis。
整體的專案框架圖：
目錄
1.5 新增攔截器MethodCacheInterceptor
1.1 新增jar包
在pom.xml檔案中新增Redis所需的jar包
注意，本框架使用的是spring 4.3.14.RELEASE版本，redis 2.9.0版本的，spring-redis 1.8.10.RELEASE版本的，一定要看好版本，有的版本是不支援的。
另外本框架使用的是spring面向切面引入的Redis。
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<!-- spring版本號 --> <spring.version>4.3.14.RELEASE</spring.version> <!-- mybatis版本號 --> <mybatis.version>3.2.6</mybatis.version> |
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<!-- redis客戶端jar --> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.9.0</version> </dependency> <!-- spring-redis實現 --> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.8.10.RELEASE</version> </dependency> |
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<!-- spring 切面外掛 start --> <dependency> <groupId>aopalliance</groupId> <artifactId>aopalliance</artifactId> <version>1.0</version> </dependency> <dependency> <groupId>aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.5.4</version> </dependency> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.9.2</version> </dependency> <!-- spring 切面外掛 end--> |
1.2 新增一個redis.properties檔案
此檔案用來配置Redis。
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# Redis settings redis.host=127.0.0.1 redis.port=6379 redis.pass= redis.maxIdle=400 redis.maxTotal=6000 redis.maxWaitMillis=1000 redis.blockWhenExhausted=true redis.testOnBorrow=true redis.timeout=100000 defaultCacheExpireTime=3600 |
1.3 配置一個spring-redis.xml檔案
此檔案用來Spring管理Redis。
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<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" 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-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- redis資料來源 --> <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig"> <!-- 最大空閒數 --> <property name="maxIdle" value="${redis.maxIdle}" /> <!-- 最大空連線數 --> <property name="maxTotal" value="${redis.maxTotal}" /> <!-- 最大等待時間 --> <property name="maxWaitMillis" value="${redis.maxWaitMillis}" /> <!-- 連線超時時是否阻塞，false時報異常,ture阻塞直到超時, 預設true --> <property name="blockWhenExhausted" value="${redis.blockWhenExhausted}" /> <!-- 返回連線時，檢測連線是否成功 --> <property name="testOnBorrow" value="${redis.testOnBorrow}" /> </bean> <!-- Spring-redis連線池管理工廠 --> <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" p:hostName="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:timeout="${redis.timeout}" p:poolConfig-ref="poolConfig" p:usePool="true"> </bean> <!-- redis template definition --> <bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"> <property name="connectionFactory" ref="jedisConnectionFactory" /> <property name="keySerializer"> <bean class="org.springframework.data.redis.serializer.StringRedisSerializer" /> </property> <property name="valueSerializer"> <bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer" /> </property> <property name="hashKeySerializer"> <bean class="org.springframework.data.redis.serializer.StringRedisSerializer" /> </property> <property name="hashValueSerializer"> <bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer" /> </property> <!--開啟事務 --> <property name="enableTransactionSupport" value="true"></property> </bean> <!-- 快取攔截器配置 --> <bean id="methodCacheInterceptor" class="com.ivan.redis.MethodCacheInterceptor"> <property name="redisUtil" ref="redisUtil" /> <property name="defaultCacheExpireTime" value="${defaultCacheExpireTime}" /> <!-- 禁用快取的類名列表 --> <property name="targetNamesList"> <list> <value></value> </list> </property> <!-- 禁用快取的方法名列表 --> <property name="methodNamesList"> <list> <value>add</value> <value>delete</value> <value>edit</value> </list> </property> </bean> <bean id="redisUtil" class="com.ivan.redis.RedisUtil"> <property name="redisTemplate" ref="redisTemplate" /> </bean> <!--配置切面攔截方法 --> <aop:config proxy-target-class="true"> <!-- <aop:pointcut id="controllerMethodPointcut" expression="execution(* com.ivan.service.impl.*.get*(..))" /> --> <aop:pointcut id="controllerMethodPointcut" expression="execution(* com.ivan.service.impl.*.*(..))" /> <aop:advisor advice-ref="methodCacheInterceptor" pointcut-ref="controllerMethodPointcut" /> </aop:config> </beans> |
1.4 配置spring-mybatis.xml
在spring-mybatis.xml中首先引入redis.properties，然後再引入spring-redis.xml。
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<!-- 引入配置檔案 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:jdbc.properties</value> <value>classpath:redis.properties</value> </list> </property> <!--這個配置告訴spring，當某個placeholder無法找到時， 先不要報錯，並嘗試用另一個PropertyPlaceholderConfigurer來設定placeholder的值。 --> <!-- <property name="ignoreUnresolvablePlaceholders" value="true"></property> --> </bean> |
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<!-- redis配置 --> <import resource="spring-redis.xml" /> |
1.5 新增攔截器MethodCacheInterceptor
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package com.ivan.redis; import com.ivan.redis.RedisUtil; import org.aopalliance.intercept.MethodInterceptor; import org.aopalliance.intercept.MethodInvocation; import java.util.List; //Redis快取過濾器 public class MethodCacheInterceptor implements MethodInterceptor { private RedisUtil redisUtil; private List<String> targetNamesList; // 禁用快取的類名列表 private List<String> methodNamesList; // 禁用快取的方法列表 private String defaultCacheExpireTime; // 快取預設的過期時間 @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)) { // 跳過快取返回結果 return invocation.proceed(); } Object[] arguments = invocation.getArguments(); String key = getCacheKey(targetName, methodName, arguments); try { // 判斷是否有快取 if (redisUtil.exists(key)) return redisUtil.get(key); // 寫入快取 // 不存在執行資料庫操作 value = invocation.proceed(); if (value != null) { final String tkey = key; final Object tvalue = value; new Thread(new Runnable() { @Override public void run() { // 將查詢的物件存入redis快取 redisUtil.set(tkey, tvalue, Long.parseLong(defaultCacheExpireTime)); } }).start(); } } catch (Exception e) { e.printStackTrace(); if (value == null) return invocation.proceed(); } return value; } // 是否加入快取 private boolean isAddCache(String targetName, String methodName) { if (targetNamesList.contains(targetName) || targetName.contains("$$EnhancerBySpringCGLIB$$")) { redisUtil.deleteKeys("*"); return false; } for (String methName : methodNamesList) { if (methodName.contains(methName)) { redisUtil.deleteKeys("*"); return false; } } return true; } // 建立快取key 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; } } |
1.6 新增Redis操作類RedisUtil
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package com.ivan.redis; import java.io.Serializable; import java.util.Set; import java.util.concurrent.TimeUnit; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.data.redis.core.ValueOperations; //Redis工具類 public class RedisUtil { private RedisTemplate<Serializable, Object> redisTemplate; // 批量刪除對應的value public void remove(final String... keys) { for (String key : keys) remove(key); } // 批量刪除key public void removePattern(final String pattern) { Set<Serializable> keys = redisTemplate.keys(pattern); if (keys.size() > 0) redisTemplate.delete(keys); } // 刪除對應的value public void remove(final String key) { if (exists(key)) redisTemplate.delete(key); } // 刪除符合要求的key by ivan public void deleteKeys(final String key) { redisTemplate.delete(redisTemplate.keys(key)); } // 判斷快取中是否有對應的value public boolean exists(final String key) { return redisTemplate.hasKey(key); } // 讀取快取 public Object get(final String key) { Object result = null; ValueOperations<Serializable, Object> operations = redisTemplate.opsForValue(); result = operations.get(key); return result; } // 寫入快取 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; } // 寫入快取 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; } } |
1.7 實體類必須序列化
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package com.ivan.pojo; import java.io.Serializable; //要想使用redis存物件，一定要讓實體類實現Serializable介面，否則會報錯 public class PojoParent implements Serializable{ private static final long serialVersionUID = 1L; } |
1.8 Mybatis必須開啟快取機制，非必須，只有配合用cache快取的時候用
在mybatis-config.xml中新增如下語句：
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<settings> <!-- 二級快取開啟 --> <setting name="cacheEnabled" value="true"/> <setting name="lazyLoadingEnabled" value="false"/> <setting name="aggressiveLazyLoading" value="true"/> </settings> |
1.8 完整的專案打包請去我的部落格地址下載：
https://download.csdn.net/download/hello_me_you/10759565
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