由于項目需要簡單的理解了一些memcached的運行，現在比較流行的緩存框架是Redis,本文不介紹了。

Memcached 是一個高性能的分布式內存對象緩存系統，用于動態Web應用以減輕數據庫負載。它通過在內存中緩存數據和對象來減少讀取數據庫的次數，從而提高動態、數據庫驅動網站的速度。Memcached基于一個存儲鍵/值對的hashmap。其守護進程（daemon ）是用C寫的，但是客戶端可以用任何語言來編寫，并通過memcached協議與守護進程通信。

 <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> 	<!-- 客戶端：java_memcached-release_2.6.3 -->	<bean id="memcachedPool" class="com.danga.MemCached.SockIOPool" factory-method="getInstance" init-method="initialize" lazy-init="false" destroy-method="shutDown">		<constructor-arg>			<value>memcachedPool</value>		</constructor-arg>		<!-- 可以設置多個memcached服務器 -->		<property name="servers">			 <list>                  <value>${memcached.server1}:${memcached.port1}</value>  			</list>		</property>		<!-- 每個服務器初始連接數 -->		<property name="initConn">		  <value>${memcached.initConn}</value>  		</property>		<!-- 每個服務器最小連接數 -->		<property name="minConn">		       <value>${memcached.minConn}</value>  		</property>		<!-- 每個服務器最大連接數 -->		<property name="maxConn">		     <value>${memcached.maxConn}</value>  		</property>		<!-- 主線程睡眠時間 -->		<property name="maintSleep">	          <value>${memcached.maintSleep}</value>  		</property>		<!-- TCP/Socket的參數，如果是true在寫數據時不緩沖，立即發送出去參數 -->		<property name="nagle">		   <value>${memcached.nagle}</value>  		</property>		<!-- 連接超時/阻塞讀取數據的超時間是 -->		<property name="socketTO">		    <value>${memcached.socketTO}</value>  		</property>	</bean>		<bean id="memcachedClient" class="com.danga.MemCached.MemCachedClient" >		<constructor-arg>			<value>memcachedPool</value>		</constructor-arg>	</bean>配置memcached.properties文件
#服務器地址  memcached.server1=127.0.0.1memcached.port1=11211#memcached.server=127.0.0.1:11211#初始化時對每個服務器建立的連接數目  memcached.initConn=20  #每個服務器建立最小的連接數  memcached.minConn=10  #每個服務器建立最大的連接數  memcached.maxConn=50  #自查線程周期進行工作，其每次休眠時間  memcached.maintSleep=3000  #Socket的參數，如果是true在寫數據時不緩沖，立即發送出去  memcached.nagle=false  #Socket阻塞讀取數據的超時時間  memcached.socketTO=3000  
配置spring-servlet-config.xml
 <!-- 使用@Controllers前配置 -->    <mvc:annotation-driven />                    <!-- 容器加載時 自動掃描所有注解 -->    <context:component-scan base-package="com.test" use-default-filters="false">        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />        <context:include-filter type="annotation" expression="org.springframework.stereotype.Service" />        <context:include-filter type="annotation" expression="org.springframework.stereotype.Repository" />        <context:include-filter type="annotation" expression="org.springframework.stereotype.Component" />    </context:component-scan>               <!-- 配置靜態資源  -->        <mvc:resources mapping="/js/**" location="/js/" />      <mvc:resources mapping="/image/**" location="/image/" />     <mvc:resources mapping="/CSS/**" location="/css/" />               <!-- 使用jsp作為視圖 -->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="viewClass">            <value>org.springframework.web.servlet.view.JstlView</value>        </property>        <!-- 目標路徑返回到pages下 使用jsp作為視圖 -->        <property name="prefix" value="/pages/"></property>        <property name="suffix" value=".jsp"></property>    </bean>            <!-- 異常處理 -->    <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">            <property name="exceptionMappings">                <props>                    <prop key="org.apache.shiro.authz.UnauthorizedException">error/403</prop>                </props>            </property>        </bean>    
配置web.xml
 <!-- 引入 spring -->  <listener>      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  </listener>   <context-param>      <param-name>contextConfigLocation</param-name>      <param-value>classpath:/applicationContext..xml</param-value>  </context-param>    <!-- 引入 springMVC -->  <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:/spring-servlet-config.xml</param-value>      </init-param>  </servlet>    <servlet-mapping>      <servlet-name>springMVC</servlet-name>      <url-pattern>/</url-pattern>  </servlet-mapping>    <!-- 編碼 UTF-8 -->  <filter>      <filter-name>SpringMVC-Memcached-Encoding</filter-name>      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>      <init-param>          <param-name>encoding</param-name>          <param-value>UTF-8</param-value>      </init-param>      <init-param>      <param-name>forceEncoding</param-name>      <param-value>true</param-value>      </init-param>  </filter>  <filter-mapping>      <filter-name>SpringMVC-Memcached-Encoding</filter-name>      <url-pattern>/*</url-pattern>  </filter-mapping>測試類contoller
@RequestMapping("/login")    public ModelAndView login(            @RequestParam(value = "username") String username,            @RequestParam(value = "passWord") String password, Httpsession session){                ModelAndView m = new ModelAndView();        m.setViewName("index");//成功返回/pages/index.jsp         Memcached.set("wasd", "12ab",new Date(1000 * 60));        Object ss = Memcached.get("wasd");                System.out.println(ss.toString());        m.addObject("returnMsg","好的！");        return m;    }效果圖相關jar