在非SpringBean类中从ApplicationContext取出Bean

@Component
public class SpringContextHolder implements ApplicationContextAware {

	private static ApplicationContext applicationContext;

	// 实现ApplicationContextAware接口的context注入函数, 将其存入静态变量.
	@Override
	public void setApplicationContext(ApplicationContext applicationContext) {
		SpringContextHolder.applicationContext = applicationContext;
	}

	// 取得存储在静态变量中的ApplicationContext.
	public static ApplicationContext 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.
	// 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();
		@SuppressWarnings("rawtypes")
		Map beanMaps = applicationContext.getBeansOfType(clazz);
		if (beanMaps != null && !beanMaps.isEmpty()) {
			return (T) beanMaps.values().iterator().next();
		} else {
			return null;
		}
	}

	private static void checkApplicationContext() {
		if (applicationContext == null) {
			throw new IllegalStateException("applicaitonContext未注入,请在applicationContext.xml中定义SpringContextHolder");
		}
	}

}

private static final RedisTemplate<String, Object> REDIS_TEMPLATE = SpringContextHolder
        .getBean(RedisTemplate.class);