1.安装memcache
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2. 新建配置文件(spring级别)
新建名为spring-memcache.xml的spring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: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-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"><bean id="memcachedPool" class="com.danga.MemCached.SockIOPool" factory-method="getInstance" init-method="initialize" destroy-method="shutDown"><constructor-arg><value>neeaMemcachedPool</value></constructor-arg><property name="servers"><list><value>${memcache.server}</value></list></property><property name="initConn"><value>${memcache.initConn}</value></property><property name="minConn"><value>${memcache.minConn}</value></property><property name="maxConn"><value>${memcache.maxConn}</value></property><property name="maintSleep"><value>${memcache.maintSleep}</value></property><property name="nagle"><value>${memcache.nagle}</value></property><property name="socketTO"><value>${memcache.socketTO}</value></property></bean><bean id="memcachedClient" class="com.danga.MemCached.MemCachedClient"><constructor-arg><value>neeaMemcachedPool</value></constructor-arg></bean></beans>
3.Web.xml文件中配置新建的文件
<!-- 配置spring的监听器,加载Spring配置文件--><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:/spring/applicationContext-common.xml,classpath:/spring/spring-memcache.xml</param-value></context-param>
4. 修改spring配置文件
修改applicationContext-common.xml配置文件。
1).添加properties配置文件(memcache.properties)去配置memcache的属性。
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="locations"><list><value>classpath:memcache.properties</value><value>classpath:jdbc.properties</value></list></property></bean>
2).添加bean去初始化我们自己的一个spring工具类,一会进行详细解释。
<bean id="springContextHolder" class="com.hxrainbow.crm.util.SpringContextHolder"/>
5. Memcache配置文件
memcache.properties文件内容如下:
mcache.server=127.0.0.1\:11211 memcache.initConn=20 memcache.minConn=10 memcache.maxConn=50 memcache.maintSleep=3000 memcache.nagle=false memcache.socketTO=3000
6. 获得spring容器的工具类
/** * 以静态变量保存Spring ApplicationContext, 可在任何代码任何地方任何时候中取出ApplicaitonContext. **/ public class SpringContextHolder implementsApplicationContextAware{ private static ApplicationContext applicationContext; /** * 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量. */ public voidsetApplicationContext(ApplicationContext applicationContext) { SpringContextHolder.applicationContext= applicationContext; } /** * 取得存储在静态变量中的ApplicationContext. */ public staticApplicationContext getApplicationContext() { checkApplicationContext(); return applicationContext; } /** * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型. */ @SuppressWarnings("unchecked") public static<T> T getBean(String name) { checkApplicationContext(); return (T) applicationContext.getBean(name); } /** * 从静态变量ApplicationContext中取得Bean, 自动转型为所赋值对象的类型. * 如果有多个Bean符合Class, 取出第一个. */ @SuppressWarnings("unchecked") public static<T> T getBean(Class<T> clazz) { checkApplicationContext(); Map beanMaps = applicationContext.getBeansOfType(clazz); if (beanMaps!=null&& !beanMaps.isEmpty()) { return(T) beanMaps.values().iterator().next(); } else{ return null; } } private static voidcheckApplicationContext() { if (applicationContext == null) { throw newIllegalStateException("applicaitonContext未注入,请在applicationContext.xml中定义SpringContextHolder"); } } }
首先说一下ApplicationContextAware这个接口,这个接口中有一个方法:
void setApplicationContext(ApplicationContext applicationContext)
下面是这个方法的简单说明:
Set the ApplicationContext that this object runs in.Normally this call will be used to initialize the object.
我们在配置文件中配置了bean的初始化,然后他就可以用于获得spring容器中的东西了。
7.memcache的工具类
public class MemcacheUtil { public static MemCachedClient getMemCachedClient() { return SpringContextHolder.getBean("memcachedClient"); } } |
8.junit测试类
public class MemcacheUtilTest { static MemCachedClient memcachedClient; @BeforeClass public static void setUpBeforeClass() throws Exception { ApplicationContext ac=new ClassPathXmlApplicationContext(new String[]{"/spring/applicationContext-common.xml","/spring/spring-memcache.xml"}); } @Test public void s() { MemCachedClient m=SpringContextHolder.getBean("memcachedClient"); m.set("name", "yunhui"); System.out.println(m.get("name")); } } |
9. Java对memcache调用的实现
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