用SpringContextUtil实现ApplicationContextAware

package util;import java.util.Locale;import org.springframework.beans.BeansException;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;public class SpringContextUtil implements ApplicationContextAware{ private static ApplicationContext context; @Override public void setApplicationContext(ApplicationContext contex) throws BeansException { System.out.println("--------------------contex---------"+contex); SpringContextUtil.context = contex; } public static ApplicationContext getApplicationContext() { return context; } public static Object getBean(String beanName) { return context.getBean(beanName); } public static String getMessage(String key) { return context.getMessage(key, null, Locale.getDefault()); }}

工具类

package redis;import redis.clients.jedis.JedisPool;import util.SpringContextUtil;public class RedisUtil { private static JedisPool jedisPool; static{ jedisPool = (JedisPool)SpringContextUtil.getBean("jedisPool"); } public static JedisPool getJedisPool(){ if(jedisPool == null){ jedisPool = (JedisPool)SpringContextUtil.getBean("jedisPool"); } return jedisPool; } public void flusDB(){ jedisPool.getResource().flushDB(); } public static String set(String key,String value){ return jedisPool.getResource().set(key, value); } public static String get(String key){ return jedisPool.getResource().get(key); } public static Long del(String key){ return jedisPool.getResource().del(key); }}

在Spring的配置文件中配置这个类，Spring容器会在加载完Spring容器后把上下文对象调用这个对象中的setApplicationContext方法

<!--1 自动扫描 将标注Spring注解的类自动转化Bean--> <context:component-scan base-package="com.first,com.util" /> <!--2 加载数据资源属性文件 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:jdbc.properties</value> <value>classpath:redis.properties</value> </list> </property> </bean> <bean id="springContextUtil" class="util.SpringContextUtil"></bean> <import resource="redis-config.xml"/>在web项目中的web.xml中配置加载Spring容器的Listener<!-- 初始化Spring容器，让Spring容器随Web应用的启动而自动启动 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>

spring配置文件注入Bean类

<bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig"> <property name="maxIdle" value="300" /> <!-- 最大能够保持idel状态的对象数 --> <property name="testOnBorrow" value="true" /> <!-- 当调用borrow Object方法时，是否进行有效性检查 --> <property name="maxActive" value="200" /> <property name="minIdle" value="10"/> <property name="maxWait" value="300" /> <property name="testOnReturn" value="true" /> <property name="testWhileIdle" value="true" /> </bean> <bean id="jedisPool" class="redis.clients.jedis.JedisPool"> <constructor-arg name="poolConfig" ref="jedisPoolConfig" /> <constructor-arg name="host" value="${redis_addr}" /> <constructor-arg name="port" value="${redis_port}" type="int" /> <constructor-arg name="timeout" value="${redis_timeout}" type="int" /> <constructor-arg name="password" value="#{'${redis_password}'!=''?'${redis_password}':null}" /> <constructor-arg name="database" value="${redis_db_index}" type="int" /> </bean>

总结

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