Spring下redis的配置
这个项目用到redis，所以学了一下怎样在Spring框架下配置redis。
1、首先是在web.xml中添加Spring的配置文件。
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> <display-name>common design</display-name> <context-param> <param-name>webAppRootKey</param-name> <param-value>webapp.root</param-value> </context-param> <!-- 添加Spring mybatis的配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml,classpath*:mybatis-config.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc-servlet.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/*</url-pattern> </servlet-mapping> </web-app>
2、然后是redis的配置文件（redis-config.xml）文件。
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-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/context http://www.springframework.org/schema/context/spring-context-3.2.xsd" default-autowire="byName" default-lazy-init="true"> <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxIdle" value="${redis.maxIdle}" /> <property name="maxWaitMillis" value="${redis.maxWait}" /> <property name="testOnBorrow" value="${redis.testOnBorrow}" /> </bean> <!-- redis服务器中心 --> <bean id="connectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"> <property name="poolConfig" ref="poolConfig" /> <property name="port" value="${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> <bean id="redisUtil" class="com.zkxl.fep.redis.RedisUtil"> <property name="redisTemplate" ref="redisTemplate" /> </bean> </beans>
在Spring的配置文件中引用redis的配置文件
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-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/context http://www.springframework.org/schema/context/spring-context-3.2.xsd" default-autowire="byName" default-lazy-init="true"> <context:annotation-config/> <context:component-scan base-package="com.test.fep" /> <!-- 增加redis的properties文件 --> <context:property-placeholder location="classpath*:jdbc.properties,classpath*:redis.properties" /> <import resource="datasource.xml"/> <!-- 导入redis的配置文件 --> <import resource="redis-config.xml"/> </beans>
3、新建redis.properties，里面包含redis连接需要的配置信息
#redis setting redis.host=127.0.0.1 redis.port=6379 redis.password=123456 redis.maxIdle=100 redis.maxActive=300 redis.maxWait=1000 redis.testOnBorrow=true redis.timeout=100000 fep.local.cache.capacity =10000
一定要注意，每行后面千万不要有空格，我就是因为这个问题卡了一两个小时= =
4、编写RedisUtil.java，里面放有redis的增删改查操作。
package com.test.fep.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; 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) { logger.error("set cache error", e); } 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) { logger.error("set cache error", e); } return result; } public long increment(final String key , long delta){ return redisTemplate.opsForValue().increment(key, delta); } public void setRedisTemplate(RedisTemplate<Serializable, Object> redisTemplate) { this.redisTemplate = redisTemplate; } }
5、在功能代码中调用RedisUtil类中的方法，
package com.test.fep.service.impl; import java.math.BigDecimal; import java.util.Date; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.test.fep.domain.SysAppLoginToken; import com.test.fep.mapper.SysAppLoginTokenMapper; import com.test.fep.redis.RedisUtil; import com.test.fep.service.AuthService; import net.sf.json.JSONObject; @Service("authService") public class AuthServiceImpl implements AuthService{ @Autowired private SysAppLoginTokenMapper sysAppLoginTokenMapper ; @Autowired private RedisUtil redisUtil; //记得注入 @Override public SysAppLoginToken verification(String tokenId) { SysAppLoginToken token = null; if (redisUtil.exists(tokenId)) { token = (SysAppLoginToken) redisUtil.get(tokenId); //从缓存中查找token }else{ token = sysAppLoginTokenMapper.selectByPrimaryKey(tokenId) ; redisUtil.set(tokenId, token); //将token写入缓存 } return null; } }
好了，到这里就在一个项目中完整地使用了redis。
还需要注意的一点是，所有保存在Redis中的接口都必须要实现Serializable接口
