基本SSM框架搭建:http://www.cnblogs.com/fuchuanzhipan1209/p/6274358.html
配置文件部分:
第一步:加入jar包
pom.xml
<!-- spring-redis实现 --> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-redis</artifactId> <version>1.6.2.RELEASE</version> </dependency> <!-- redis客户端jar --> <dependency> <groupId>redis.clients</groupId> <artifactId>jedis</artifactId> <version>2.8.0</version> </dependency> <!-- Ehcache实现,用于参考 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-ehcache</artifactId> <version>1.0.0</version> </dependency>
主配置文件:applicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:p="http://www.springframework.org/schema/p" 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-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd "> <!-- 加载db.properties文件中的内容,db.properties文件中key命名要有一定的特殊规则 --> <!-- 引入数据库配置文件 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:db.properties</value> <value>classpath:redis.properties</value> </list> </property> </bean> <!-- redis数据源 --> <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> <!-- Spring-redis连接池管理工厂 --> <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory" p:host-name="${redis.host}" p:port="${redis.port}" p:password="${redis.pass}" p:pool-config-ref="poolConfig" /> <!-- 使用中间类解决RedisCache.jedisConnectionFactory的静态注入,从而使MyBatis实现第三方缓存 --> <bean id="redisCacheTransfer" class="com.nuo.cache.RedisCacheTransfer"> <property name="jedisConnectionFactory" ref="jedisConnectionFactory" /> </bean> <!-- 配置数据源 ,dbcp --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="maxActive" value="30" /> <property name="maxIdle" value="5" /> </bean> <!-- sqlSessionFactory --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 数据库连接池 --> <property name="dataSource" ref="dataSource" /> <!-- 加载mybatis的全局配置文件 --> <property name="configLocation" value="classpath:sqlMapConfig.xml" /> </bean> <!-- mapper扫描器 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 扫描包路径,如果需要扫描多个包,中间使用半角逗号隔开 --> <property name="basePackage" value="com.nuo.mapper"></property> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" /> </bean> <!-- service --> <bean id="PersonService" class="com.nuo.service.impl.PersonServiceImpl" /> <!-- 事务管理器 对mybatis操作数据库事务控制,spring使用jdbc的事务控制类 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <!-- 数据源 dataSource在applicationContext-dao.xml中配置了 --> <property name="dataSource" ref="dataSource" /> </bean> <!-- 通知 --> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <!-- 传播行为 --> <tx:method name="save*" propagation="REQUIRED" /> <tx:method name="delete*" propagation="REQUIRED" /> <tx:method name="insert*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="find*" propagation="SUPPORTS" read-only="true" /> <tx:method name="get*" propagation="SUPPORTS" read-only="true" /> <tx:method name="select*" propagation="SUPPORTS" read-only="true" /> </tx:attributes> </tx:advice> <!-- aop --> <aop:config> <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.nuo.service.impl.*.*(..))" /> </aop:config> </beans>
mybitas配置文件:
sqlMapConfig.xml
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- 全局setting配置,根据需要添加 --> <!-- 配置mapper 由于使用spring和mybatis的整合包进行mapper扫描,这里不需要配置了。 必须遵循:mapper.xml和mapper.java文件同名且在一个目录 --> <!-- 配置mybatis的缓存,延迟加载等等一系列属性 --> <settings> <!-- 全局映射器启用缓存 *主要将此属性设置完成即可 --> <setting name="cacheEnabled" value="true" /> <!-- 查询时,关闭关联对象即时加载以提高性能 --> <setting name="lazyLoadingEnabled" value="false" /> <!-- 对于未知的SQL查询,允许返回不同的结果集以达到通用的效果 --> <setting name="multipleResultSetsEnabled" value="true" /> <!-- 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 --> <setting name="aggressiveLazyLoading" value="true" /> </settings> <!-- 配置别名 --> <typeAliases> <!-- 批量扫描别名 --> <package name="com.nuo.model" /> </typeAliases> <!-- <mappers> </mappers> --> </configuration>
redis配置:
redis.properties
# Redis settings redis.host=127.0.0.1 redis.port=6379 redis.pass= redis.maxIdle=300 redis.maxActive=600 redis.maxWait=1000 redis.testOnBorrow=true
Java代码工具类部分
静态注入中间类
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.connection.jedis.JedisConnectionFactory; /** * * @描述: 静态注入中间类 */ public class RedisCacheTransfer { @Autowired public void setJedisConnectionFactory(JedisConnectionFactory jedisConnectionFactory) { RedisCache.setJedisConnectionFactory(jedisConnectionFactory); } }
第三方内存数据库Redis
import java.util.concurrent.locks.ReadWriteLock; import java.util.concurrent.locks.ReentrantReadWriteLock; import org.apache.ibatis.cache.Cache; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.data.redis.connection.jedis.JedisConnection; import org.springframework.data.redis.connection.jedis.JedisConnectionFactory; import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer; import org.springframework.data.redis.serializer.RedisSerializer; import redis.clients.jedis.exceptions.JedisConnectionException; /** * * @描述: 使用第三方内存数据库Redis作为二级缓存 * @版权: Copyright (c) 2016 * @作者: * @版本: 1.0 * @创建日期: * @创建时间: */ public class RedisCache implements Cache { private static final Logger logger = LoggerFactory.getLogger(RedisCache.class); private static JedisConnectionFactory jedisConnectionFactory; private final String id; /** * The {@code ReadWriteLock}. */ private final ReadWriteLock readWriteLock = new ReentrantReadWriteLock(); 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 void clear() { JedisConnection connection = null; try { connection = jedisConnectionFactory.getConnection(); connection.flushDb(); connection.flushAll(); } catch (JedisConnectionException e) { e.printStackTrace(); } finally { if (connection != null) { connection.close(); } } } @Override public String getId() { return this.id; } @Override public Object getObject(Object key) { Object result = null; JedisConnection connection = null; try { connection = jedisConnectionFactory.getConnection(); RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer(); result = serializer.deserialize(connection.get(serializer.serialize(key))); } catch (JedisConnectionException e) { e.printStackTrace(); } finally { if (connection != null) { connection.close(); } } return result; } @Override public ReadWriteLock getReadWriteLock() { // TODO Auto-generated method stub return this.readWriteLock; } @Override public int getSize() { int result = 0; JedisConnection connection = null; try { connection = jedisConnectionFactory.getConnection(); result = Integer.valueOf(connection.dbSize().toString()); } catch (JedisConnectionException e) { e.printStackTrace(); } finally { if (connection != null) { connection.close(); } } return result; } @Override public void putObject(Object key, Object value) { JedisConnection connection = null; try { connection = jedisConnectionFactory.getConnection(); RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer(); connection.set(serializer.serialize(key), serializer.serialize(value)); } catch (JedisConnectionException e) { e.printStackTrace(); } finally { if (connection != null) { connection.close(); } } } @Override public Object removeObject(Object key) { JedisConnection connection = null; Object result = null; try { connection = jedisConnectionFactory.getConnection(); RedisSerializer<Object> serializer = new JdkSerializationRedisSerializer(); result = connection.expire(serializer.serialize(key), 0); } catch (JedisConnectionException e) { e.printStackTrace(); } finally { if (connection != null) { connection.close(); } } return result; } public static void setJedisConnectionFactory(JedisConnectionFactory jedisConnectionFactory) { RedisCache.jedisConnectionFactory = jedisConnectionFactory; } }
Java代码 SQL语句部分
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.nuo.mapper.PersonMapper"> <cache eviction="LRU" type="com.nuo.cache.RedisCache" /> <resultMap type="Person" id="PersonMap"> <id column="id" property="id"/> <result column="name" property="name"/> <result column="gender" property="gender"/> </resultMap> <select id="getByName" parameterType="String" resultMap="PersonMap"> <![CDATA[ SELECT * FROM person WHERE name = LOWER(#{name}) ]]> </select> <insert id="addPerson" parameterType="Person"> <![CDATA[ insert into person(name,gender) values(#{name},#{gender}); ]]> </insert> <select id="getById" parameterType="int" resultMap="PersonMap"> <![CDATA[ SELECT * FROM person WHERE id = LOWER(#{id}) ]]> </select> </mapper>
关键部分:
<cache eviction="LRU" type="com.nuo.cache.RedisCache" />
执行验证
第一次执行sql查询:
第二次执行相同语句时,不再打印sql语句,说明直接从缓存中读取了数据。
redis服务器查看
时间: 2024-10-05 00:28:46