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Mybatis整合Redis实现二级缓存
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文章目录
1、mybatis整合ehcache作为缓存
1.1、导入相关依赖
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<!--mybatis与ehcache整合-->
<dependency>
<groupId>org.mybatis.caches</groupId>
<artifactId>mybatis-ehcache</artifactId>
<version>1.1.0</version>
</dependency>
<!--ehcache依赖-->
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache</artifactId>
<version>2.10.0</version>
</dependency>
1.2、修改日志配置，因为ehcache使用了Slf4j作为日志输出
<!-- log4j2日志配置相关依赖 -->
<log4j2.version>2.9.1</log4j2.version>
<log4j2.disruptor.version>3.2.0</log4j2.disruptor.version>
<slf4j.version>1.7.13</slf4j.version>
<!-- log4j2日志相关依赖 -->
<!-- log配置：Log4j2 + Slf4j -->
<!-- slf4j核心包-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j.version}</version>
<scope>runtime</scope>
</dependency>
<!--核心log4j2jar包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--用于与slf4j保持桥接-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--web工程需要包含log4j-web，非web工程不需要-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>${log4j2.version}</version>
<scope>runtime</scope>
</dependency>
<!--需要使用log4j2的AsyncLogger需要包含disruptor-->
<dependency>
<groupId>com.lmax</groupId>
<artifactId>disruptor</artifactId>
<version>${log4j2.disruptor.version}</version>
</dependency>
1.3、加一个工具类添ehcache.xml的配置文件
<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
updateCheck="false">
<!--磁盘存储:将缓存中暂时不使用的对象,转移到硬盘,类似于Windows系统的虚拟内存-->
<!--path:指定在硬盘上存储对象的路径-->
<!--java.io.tmpdir 是默认的临时文件路径。 可以通过如下方式打印出具体的文件路径 System.out.println(System.getProperty("java.io.tmpdir"));-->
<diskStore path="java.io.tmpdir"/>
<!--defaultCache：默认的管理策略-->
<!--eternal：设定缓存的elements是否永远不过期。如果为true，则缓存的数据始终有效，如果为false那么还要根据timeToIdleSeconds，timeToLiveSeconds判断-->
<!--maxElementsInMemory：在内存中缓存的element的最大数目-->
<!--overflowToDisk：如果内存中数据超过内存限制，是否要缓存到磁盘上-->
<!--diskPersistent：是否在磁盘上持久化。指重启jvm后，数据是否有效。默认为false-->
<!--timeToIdleSeconds：对象空闲时间(单位：秒)，指对象在多长时间没有被访问就会失效。只对eternal为false的有效。默认值0，表示一直可以访问-->
<!--timeToLiveSeconds：对象存活时间(单位：秒)，指对象从创建到失效所需要的时间。只对eternal为false的有效。默认值0，表示一直可以访问-->
<!--memoryStoreEvictionPolicy：缓存的3 种清空策略-->
<!--FIFO：first in first out (先进先出)-->
<!--LFU：Less Frequently Used (最少使用).意思是一直以来最少被使用的。缓存的元素有一个hit 属性，hit 值最小的将会被清出缓存-->
<!--LRU：Least Recently Used(最近最少使用). (ehcache 默认值).缓存的元素有一个时间戳，当缓存容量满了，而又需要腾出地方来缓存新的元素的时候，那么现有缓存元素中时间戳离当前时间最远的元素将被清出缓存-->
<defaultCache eternal="false" maxElementsInMemory="1000" overflowToDisk="false" diskPersistent="false"
timeToIdleSeconds="0" timeToLiveSeconds="600" memoryStoreEvictionPolicy="LRU"/>
<!--name： Cache的名称，必须是唯一的(ehcache会把这个cache放到HashMap里)-->
<cache name="stuCache" eternal="false" maxElementsInMemory="100"
overflowToDisk="false" diskPersistent="false" timeToIdleSeconds="0"
timeToLiveSeconds="300" memoryStoreEvictionPolicy="LRU"/>
</ehcache>
1.4、开启mybatis的二级缓存
applicationContext-mybatis.xml中添加
!--设置mybaits对缓存的支持-->
<property name="configurationProperties">
<props>
<!-- 全局映射器启用缓存 *主要将此属性设置完成即可-->
<prop key="cacheEnabled">true</prop>
<!-- 查询时，关闭关联对象即时加载以提高性能 -->
<prop key="lazyLoadingEnabled">false</prop>
<!-- 设置关联对象加载的形态，此处为按需加载字段(加载字段由SQL指 定)，不会加载关联表的所有字段，以提高性能 -->
<prop key="aggressiveLazyLoading">true</prop>
</props>
</property>
1.5、在bookMapper.xml中配置cache
<cache type="org.mybatis.caches.ehcache.EhcacheCache"></cache>
1.6、测试
@Test
public void cachMany() {
Map map = new HashMap();
map.put("bname", StringUtils.toLikeStr("圣墟"));
pageBean.setPage(3);
List<Map> list = this.bookservice.listP(map,pageBean);
for (Map map1 : list) {
System.out.println(list);
}
List<Map> list2 = this.bookservice.listP(map,pageBean);
for (Map map1 : list) {
System.out.println(list);
}
}
@Test
public void cachSimgle() {
Book b1 = this.bookservice.selectByPrimaryKey(29);
System.out.println(b1);
Book b2 = this.bookservice.selectByPrimaryKey(29);
System.out.println(b2);
}
2、Mybatis集成redis
2.1. 添加jar依赖
<!-- redis与spring的整合依赖 -->
<redis.version>2.9.0</redis.version>
<redis.spring.version>1.7.1.RELEASE</redis.spring.version>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>${redis.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>${redis.spring.version}</version>
</dependency>
完整的依赖包
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>Redis01</artifactId>
<groupId>com.zrh</groupId>
<version>1.0-SNAPSHOT</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>SSM</artifactId>
<packaging>war</packaging>
<name>SSM Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<maven.compiler.plugin.version>3.7.0</maven.compiler.plugin.version>
<!--添加jar包依赖-->
<!--1.spring 5.0.2.RELEASE相关-->
<spring.version>5.0.2.RELEASE</spring.version>
<!--2.mybatis相关-->
<mybatis.version>3.4.5</mybatis.version>
<!--mysql-->
<mysql.version>5.1.44</mysql.version>
<!--pagehelper分页jar依赖-->
<pagehelper.version>5.1.2</pagehelper.version>
<!--mybatis与spring集成jar依赖-->
<mybatis.spring.version>1.3.1</mybatis.spring.version>
<!--3.dbcp2连接池相关 druid-->
<commons.dbcp2.version>2.1.1</commons.dbcp2.version>
<commons.pool2.version>2.4.3</commons.pool2.version>
<!--4.log日志相关-->
<log4j2.version>2.9.1</log4j2.version>
<!--5.其他-->
<junit.version>4.12</junit.version>
<servlet.version>4.0.0</servlet.version>
<lombok.version>1.18.2</lombok.version>
<!-- log4j2日志配置相关依赖 -->
<log4j2.version>2.9.1</log4j2.version>
<log4j2.disruptor.version>3.2.0</log4j2.disruptor.version>
<slf4j.version>1.7.13</slf4j.version>
<!-- redis与spring的整合依赖 -->
<redis.version>2.9.0</redis.version>
<redis.spring.version>1.7.1.RELEASE</redis.spring.version>
<!-- jackson -->
<jackson.version>2.9.3</jackson.version>
</properties>
<dependencies>
<!--1.spring相关-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--2.mybatis相关-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!--mysql-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!--pagehelper分页插件jar包依赖-->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>${pagehelper.version}</version>
</dependency>
<!--mybatis与spring集成jar包依赖-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!--3.dbcp2连接池相关-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>${commons.dbcp2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>${commons.pool2.version}</version>
</dependency>
<!--4.log日志相关依赖-->
<!--核心log4j2jar包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--web工程需要包含log4j-web，非web工程不需要-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--5.其他-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<!--mybatis与ehcache整合-->
<dependency>
<groupId>org.mybatis.caches</groupId>
<artifactId>mybatis-ehcache</artifactId>
<version>1.1.0</version>
</dependency>
<!--ehcache依赖-->
<dependency>
<groupId>net.sf.ehcache</groupId>
<artifactId>ehcache</artifactId>
<version>2.10.0</version>
</dependency>
<!-- log4j2日志相关依赖 -->
<!-- log配置：Log4j2 + Slf4j -->
<!-- slf4j核心包-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j.version}</version>
<scope>runtime</scope>
</dependency>
<!--核心log4j2jar包-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--用于与slf4j保持桥接-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${log4j2.version}</version>
</dependency>
<!--web工程需要包含log4j-web，非web工程不需要-->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>${log4j2.version}</version>
<scope>runtime</scope>
</dependency>
<!--需要使用log4j2的AsyncLogger需要包含disruptor-->
<dependency>
<groupId>com.lmax</groupId>
<artifactId>disruptor</artifactId>
<version>${log4j2.disruptor.version}</version>
</dependency>
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>${redis.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>${redis.spring.version}</version>
</dependency>
<!-- jackson -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
</dependencies>
<build>
<finalName>SSM</finalName>
<resources>
<!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
<resource>
<directory>src/main/resources</directory>
<includes>
<include>*.properties</include>
<include>*.xml</include>
</includes>
</resource>
</resources>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven.compiler.plugin.version}</version>
<configuration>
<source>${maven.compiler.source}</source>
<target>${maven.compiler.target}</target>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<dependencies>
<!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
</dependencies>
<configuration>
<overwrite>true</overwrite>
</configuration>
</plugin>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
2.2spring + redis 集成实现缓存功能(与mybatis无关)
添加两个redis的配置文件，并将redis.properties和applicationContext-redis.xml配置到applicationContext.xml文件中
redis.properties
applicationContext-redis.xml
redis.properties
redis.hostName=192.168.198.128
redis.port=6379
redis.password=123456
redis.timeout=10000
redis.maxIdle=300
redis.maxTotal=1000
redis.maxWaitMillis=1000
redis.minEvictableIdleTimeMillis=300000
redis.numTestsPerEvictionRun=1024
redis.timeBetweenEvictionRunsMillis=30000
redis.testOnBorrow=true
redis.testWhileIdle=true
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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 1. 引入properties配置文件 -->
<context:property-placeholder location="classpath:redis.properties" />
<!-- 2. redis连接池配置-->
<bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
<!--最大空闲数-->
<property name="maxIdle" value="${redis.maxIdle}"/>
<!--连接池的最大数据库连接数 -->
<property name="maxTotal" value="${redis.maxTotal}"/>
<!--最大建立连接等待时间-->
<property name="maxWaitMillis" value="${redis.maxWaitMillis}"/>
<!--逐出连接的最小空闲时间 默认1800000毫秒(30分钟)-->
<property name="minEvictableIdleTimeMillis" value="${redis.minEvictableIdleTimeMillis}"/>
<!--每次逐出检查时 逐出的最大数目 如果为负数就是 : 1/abs(n), 默认3-->
<property name="numTestsPerEvictionRun" value="${redis.numTestsPerEvictionRun}"/>
<!--逐出扫描的时间间隔(毫秒) 如果为负数,则不运行逐出线程, 默认-1-->
<property name="timeBetweenEvictionRunsMillis" value="${redis.timeBetweenEvictionRunsMillis}"/>
<!--是否在从池中取出连接前进行检验,如果检验失败,则从池中去除连接并尝试取出另一个-->
<property name="testOnBorrow" value="${redis.testOnBorrow}"/>
<!--在空闲时检查有效性, 默认false -->
<property name="testWhileIdle" value="${redis.testWhileIdle}"/>
</bean>
<!-- 3. redis连接工厂 -->
<bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"
destroy-method="destroy">
<property name="poolConfig" ref="poolConfig"/>
<!--IP地址 -->
<property name="hostName" value="${redis.hostName}"/>
<!--端口号 -->
<property name="port" value="${redis.port}"/>
<!--如果Redis设置有密码 -->
<property name="password" value="${redis.password}"/>
<!--客户端超时时间单位是毫秒 -->
<property name="timeout" value="${redis.timeout}"/>
</bean>
<!-- 4. redis操作模板,使用该对象可以操作redis -->
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="connectionFactory"/>
<!--如果不配置Serializer，那么存储的时候缺省使用String，如果用User类型存储，那么会提示错误User can't cast to String！！ -->
<property name="keySerializer">
<bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
</property>
<property name="valueSerializer">
<bean class="org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer"/>
</property>
<property name="hashKeySerializer">
<bean class="org.springframework.data.redis.serializer.StringRedisSerializer"/>
</property>
<property name="hashValueSerializer">
<bean class="org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer"/>
</property>
<!--开启事务 -->
<property name="enableTransactionSupport" value="true"/>
</bean>
<!-- 5.使用中间类解决RedisCache.RedisTemplate的静态注入，从而使MyBatis实现第三方缓存 -->
<bean id="redisCacheTransfer" class="com.zrh.util.RedisCacheTransfer">
<property name="redisTemplate" ref="redisTemplate"/>
</bean>
</beans>
引入两个或多个属性文件的写法
<context:property-placeholder ignore-unresolvable=“true” location=“classpath:jdbc.properties,classpath:redis.properties” />
2.3log4j2配置
<!-- jackson -->
<jackson.version>2.9.3</jackson.version>
<!-- jackson -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
2.4 将redis缓存引入到mybatis中
首先创建mybatis的自定义缓存类“RedisCache”，必须实现org.apache.ibatis.cache.Cache接口
RedisCache
package com.zrh.util;
import org.apache.ibatis.cache.Cache;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.dao.DataAccessException;
import org.springframework.data.redis.connection.RedisConnection;
import org.springframework.data.redis.core.RedisCallback;
import org.springframework.data.redis.core.RedisTemplate;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
public class RedisCache implements Cache //实现类
{
private static final Logger logger = LoggerFactory.getLogger(RedisCache.class);
private static RedisTemplate<String,Object> redisTemplate;
private final String id;
/**
* The {@code ReadWriteLock}.
*/
private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock();
@Override
public ReadWriteLock getReadWriteLock()
{
return this.readWriteLock;
}
public static void setRedisTemplate(RedisTemplate redisTemplate) {
RedisCache.redisTemplate = redisTemplate;
}
public RedisCache(final String id) {
if (id == null) {
throw new IllegalArgumentException("Cache instances require an ID");
}
logger.debug("MybatisRedisCache:id=" + id);
this.id = id;
}
@Override
public String getId() {
return this.id;
}
@Override
public void putObject(Object key, Object value) {
try{
logger.info(">>>>>>>>>>>>>>>>>>>>>>>>putObject: key="+key+",value="+value);
if(null!=value)
redisTemplate.opsForValue().set(key.toString(),value,2, TimeUnit.DAYS);
}catch (Exception e){
e.printStackTrace();
logger.error("redis保存数据异常！");
}
}
@Override
public Object getObject(Object key) {
try{
logger.info(">>>>>>>>>>>>>>>>>>>>>>>>getObject: key="+key);
if(null!=key)
return redisTemplate.opsForValue().get(key.toString());
}catch (Exception e){
e.printStackTrace();
logger.error("redis获取数据异常！");
}
return null;
}
@Override
public Object removeObject(Object key) {
try{
if(null!=key)
return redisTemplate.expire(key.toString(),1,TimeUnit.DAYS);
}catch (Exception e){
e.printStackTrace();
logger.error("redis获取数据异常！");
}
return null;
}
@Override
public void clear() {
Long size=redisTemplate.execute(new RedisCallback<Long>() {
@Override
public Long doInRedis(RedisConnection redisConnection) throws DataAccessException {
Long size = redisConnection.dbSize();
//连接清除数据
redisConnection.flushDb();
redisConnection.flushAll();
return size;
}
});
logger.info(">>>>>>>>>>>>>>>>>>>>>>>>clear: 清除了" + size + "个对象");
}
@Override
public int getSize() {
Long size = redisTemplate.execute(new RedisCallback<Long>() {
@Override
public Long doInRedis(RedisConnection connection)
throws DataAccessException {
return connection.dbSize();
}
});
return size.intValue();
}
}
静态注入中间类“RedisCacheTransfer”，解决RedisCache中RedisTemplate的静态注入，从而使MyBatis实现第三方缓存
RedisCacheTransfer.java
<?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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<context:property-placeholder location="classpath:jdbc.properties,classpath:redis.properties"/>
<!--整合mybatis框架-->
<import resource="applicationContext.mybatis.xml"></import>
<!--整合redis框架-->
<import resource="applicationContext-redis.xml"></import>
</beans>
2.5在bookMapper.xml中添加自定义cache功能
<cache type="com.zrh.util.RedisCache"></cache>
测试代码
@Test
public void cachMany() {
Map map = new HashMap();
map.put("bname", StringUtils.toLikeStr("圣墟"));
pageBean.setPage(3);
List<Map> list = this.bookservice.listP(map,pageBean);
for (Map map1 : list) {
System.out.println(list);
}
List<Map> list2 = this.bookservice.listP(map,pageBean);
for (Map map1 : list) {
System.out.println(list);
}
}
@Test
public void cachSimgle() {
Book b1 = this.bookservice.selectByPrimaryKey(29);
System.out.println(b1);
Book b2 = this.bookservice.selectByPrimaryKey(29);
System.out.println(b2);
}
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