转载:http://blog.csdn.net/u013725455/article/details/52102170
Memcached Client目前有3种:
Memcached Client for Java
SpyMemcached
XMemcached
这三种Client一直存在各种争议:
Memcached Client for Java 比 SpyMemcached更稳定、更早、更广泛;
SpyMemcached 比 Memcached Client for Java更高效;
XMemcached 比 SpyMemcache并发效果更好。
方式一:Memcached Client for Java
jar包准备:java_memcached-release_2.6.6.jar
memcached.properties配置文件:配置服务器地址,连接数,超时时间等
#######################Memcached配置####################### #服务器地址 memcached.server1=127.0.0.1 memcached.port1=11211 #memcached.server=127.0.0.1:11211 #初始化时对每个服务器建立的连接数目 memcached.initConn=20 #每个服务器建立最小的连接数 memcached.minConn=10 #每个服务器建立最大的连接数 memcached.maxConn=50 #自查线程周期进行工作,其每次休眠时间 memcached.maintSleep=3000 #Socket的参数,如果是true在写数据时不缓冲,立即发送出去 memcached.nagle=false #Socket阻塞读取数据的超时时间 memcached.socketTO=3000 ##pool.setServers(servers); ##pool.setWeights(weights); ##pool.setHashingAlg(SockIOPool.CONSISTENT_HASH); ##pool.setInitConn(5); ##pool.setMinConn(5); ##pool.setMaxConn(250); ##pool.setMaxIdle(1000 * 60 * 60 * 6); ##pool.setMaintSleep(30); ##pool.setNagle(false); ##pool.setSocketTO(3000); ##pool.setSocketConnectTO(0);
配置Bean
<?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:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd "> <!-- properties config --> <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="order" value="1"/> <property name="ignoreUnresolvablePlaceholders" value="true"/> <property name="locations"> <list> <!--<value>classpath:/com/springmvc/config/memcached.properties</value>--> <value>/WEB-INF/config/memcached.properties</value> </list> </property> </bean> <!-- Memcached配置 --> <bean id="memcachedPool" class="com.danga.MemCached.SockIOPool" factory-method="getInstance" init-method="initialize" destroy-method="shutDown"> <property name="servers"> <!-- ${memcached.server} --> <list> <value>${memcached.server1}:${memcached.port1}</value> </list> </property> <property name="initConn"> <value>${memcached.initConn}</value> </property> <property name="minConn"> <value>${memcached.minConn}</value> </property> <property name="maxConn"> <value>${memcached.maxConn}</value> </property> <property name="maintSleep"> <value>${memcached.maintSleep}</value> </property> <property name="nagle"> <value>${memcached.nagle}</value> </property> <property name="socketTO"> <value>${memcached.socketTO}</value> </property> </bean> </beans>
将app-context-memcached.xml配置到app-context.xml中
<?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:tx="http://www.springframework.org/schema/tx" xmlns:task="http://www.springframework.org/schema/task" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation=" http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.1.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd "> <import resource="app-context-memcached.xml" /><!--memcached 缓存配置 --> <!-- <import resource="app-context-xmemcached.xml" /> --> <!-- <import resource="app-context-spymemcached.xml" /> --> <!-- @Component and @Resource --> <bean class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor" /> <!-- 对com包中的所有类进行扫描,以完成Bean创建和自动依赖注入的功能 --> <context:component-scan base-package="com.springmvc.imooc" /> <!-- 定时器 --> <!-- <task:annotation-driven /> --> <!-- mvc --> <mvc:annotation-driven /> <!-- Aspect --> <!-- <aop:aspectj-autoproxy /> --> </beans>
Memcached工具类:
/* * 文件名:MemcachedUtils.java * 版权:Copyright 2007-2016 517na Tech. Co. Ltd. All Rights Reserved. * 描述: MemcachedUtils.java * 修改人:peiyu * 修改时间:2016年8月2日 * 修改内容:新增 */ package com.springmvc.imooc.util; import java.io.PrintWriter; import java.io.StringWriter; import java.util.Date; import com.danga.MemCached.MemCachedClient; /** * @author peiyu */ public final class MemcachedUtils { /** * cachedClient. */ private static MemCachedClient cachedClient; static { if (cachedClient == null) { cachedClient = new MemCachedClient("memcachedPool"); } } /** * 构造函数. */ private MemcachedUtils() { } /** * 向缓存添加新的键值对。如果键已经存在,则之前的值将被替换. * @param key 键 * @param value 值 * @return boolean */ public static boolean set(String key, Object value) { return setExp(key, value, null); } /** * 向缓存添加新的键值对。如果键已经存在,则之前的值将被替换. * @param key 键 * @param value 值 * @param expire 过期时间 New Date(1000*10):十秒后过期 * @return boolean */ public static boolean set(String key, Object value, Date expire) { return setExp(key, value, expire); } /** * 向缓存添加新的键值对。如果键已经存在,则之前的值将被替换. * @param key 键 * @param value 值 * @param expire 过期时间 New Date(1000*10):十秒后过期 * @return boolean */ private static boolean setExp(String key, Object value, Date expire) { boolean flag = false; try { flag = cachedClient.set(key, value, expire); } catch (Exception e) { MemcachedLog.writeLog("Memcached set方法报错,key值:" + key + "\r\n" + exceptionWrite(e)); } return flag; } /** * 仅当缓存中不存在键时,add 命令才会向缓存中添加一个键值对. * @param key 键 * @param value 值 * @return boolean */ public static boolean add(String key, Object value) { return addExp(key, value, null); } /** * 仅当缓存中不存在键时,add 命令才会向缓存中添加一个键值对. * @param key 键 * @param value 值 * @param expire 过期时间 New Date(1000*10):十秒后过期 * @return boolean */ public static boolean add(String key, Object value, Date expire) { return addExp(key, value, expire); } /** * 仅当缓存中不存在键时,add 命令才会向缓存中添加一个键值对. * @param key 键 * @param value 值 * @param expire 过期时间 New Date(1000*10):十秒后过期 * @return boolean */ private static boolean addExp(String key, Object value, Date expire) { boolean flag = false; try { flag = cachedClient.add(key, value, expire); } catch (Exception e) { MemcachedLog.writeLog("Memcached add方法报错,key值:" + key + "\r\n" + exceptionWrite(e)); } return flag; } /** * 仅当键已经存在时,replace 命令才会替换缓存中的键. * @param key 键 * @param value 值 * @return boolean */ public static boolean replace(String key, Object value) { return replaceExp(key, value, null); } /** * 仅当键已经存在时,replace 命令才会替换缓存中的键. * @param key 键 * @param value 值 * @param expire 过期时间 New Date(1000*10):十秒后过期 * @return boolean */ public static boolean replace(String key, Object value, Date expire) { return replaceExp(key, value, expire); } /** * 仅当键已经存在时,replace 命令才会替换缓存中的键. * @param key 键 * @param value 值 * @param expire 过期时间 New Date(1000*10):十秒后过期 * @return boolean */ private static boolean replaceExp(String key, Object value, Date expire) { boolean flag = false; try { flag = cachedClient.replace(key, value, expire); } catch (Exception e) { MemcachedLog.writeLog("Memcached replace方法报错,key值:" + key + "\r\n" + exceptionWrite(e)); } return flag; } /** * get 命令用于检索与之前添加的键值对相关的值. * @param key 键 * @return boolean */ public static Object get(String key) { Object obj = null; try { obj = cachedClient.get(key); } catch (Exception e) { MemcachedLog.writeLog("Memcached get方法报错,key值:" + key + "\r\n" + exceptionWrite(e)); } return obj; } /** * 删除 memcached 中的任何现有值. * @param key 键 * @return boolean */ public static boolean delete(String key) { return deleteExp(key, null); } /** * 删除 memcached 中的任何现有值. * @param key 键 * @param expire 过期时间 New Date(1000*10):十秒后过期 * @return boolean */ public static boolean delete(String key, Date expire) { return deleteExp(key, expire); } /** * 删除 memcached 中的任何现有值. * @param key 键 * @param expire 过期时间 New Date(1000*10):十秒后过期 * @return boolean */ @SuppressWarnings("deprecation") private static boolean deleteExp(String key, Date expire) { boolean flag = false; try { flag = cachedClient.delete(key, expire); } catch (Exception e) { MemcachedLog.writeLog("Memcached delete方法报错,key值:" + key + "\r\n" + exceptionWrite(e)); } return flag; } /** * 清理缓存中的所有键/值对. * @return boolean */ public static boolean flashAll() { boolean flag = false; try { flag = cachedClient.flushAll(); } catch (Exception e) { MemcachedLog.writeLog("Memcached flashAll方法报错\r\n" + exceptionWrite(e)); } return flag; } /** * 返回异常栈信息,String类型. * @param e Exception * @return boolean */ private static String exceptionWrite(Exception e) { StringWriter sw = new StringWriter(); PrintWriter pw = new PrintWriter(sw); e.printStackTrace(pw); pw.flush(); return sw.toString(); } }
测试:
System.out.println(MemcachedUtils.set("aa", "bb", new Date(1000 * 60))); Object obj = MemcachedUtils.get("aa"); System.out.println("***************************"); System.out.println(obj.toString());
时间: 2024-10-13 20:55:57