實現BeanFactoryAware

public class ServiceLocator implements BeanFactoryAware {

private static BeanFactory beanFactory;@Overridepublic void setBeanFactory(BeanFactory beanFactory) throws BeansException {ServiceLocator.beanFactory = beanFactory;}/** * 根據提供的bean名稱得到相應的服務類 *  * @param servName * bean名稱 */public static Object getService(String servName) {return beanFactory.getBean(servName);}}

spring配置文件

<bean id="serviceLocator" class="com.taobao.appcenter.common.ServiceLocator" lazy-init="false"/>

實現applicationContextAware

public class SpringContextsUtil implements ApplicationContextAware {private static ApplicationContext applicationContext;    //Spring context   @Overridepublic void setApplicationContext(ApplicationContext applicationContext) throws BeansException {SpringContextsUtil.applicationContext = applicationContext;}/**  * @return ApplicationContext  */  public static ApplicationContext getApplicationContext() {    return applicationContext;  }  /**  * 獲取對象    * @param name  * @return Object 一個以所給名字注冊的bean的實例  * @throws BeansException  */  public static Object getBean(String name) throws BeansException {    return applicationContext.getBean(name);  }}

spring xml配置文件

<bean id="springContext" class="com.taobao.appcenter.common.SpringContext" lazy-init="false"/>

通過servlet 或listener設置spring的ApplicationContext,以便后來引用,這個是針對web 工程的

public class SpringContext {private static ApplicationContext applicationContext; // Spring應用上下文環境public static void setApplicationContext(ApplicationContext applicationContext) throws BeansException {SpringContext.applicationContext = applicationContext;}/** * @return ApplicationContext */public static ApplicationContext getApplicationContext() {return applicationContext;}public static Object getBean(String name) throws BeansException {return applicationContext.getBean(name);}}

上面的SpingContext誰沒實現任何接口的，不是回調的方式。而是在listener或者servlet中set進來

public class SpringContextLoaderListener extends ContextLoaderListener {public void contextInitialized(ServletContextEvent event){super.contextInitialized(event);SpringContext.setApplicationContext(WebApplicationContextUtils.getWebApplicationContext(event.getServletContext()));}}

替換web.xml文件的listener為上面的文件

<listener><listener-class>com.taobao.appcenter.common.SpringContextLoaderListener</listener-class></listener>

servlet的代碼如下

public class SpringContextLoaderServlet extends ContextLoaderServlet { private ContextLoader contextLoader;    public void init() throws ServletException {        this.contextLoader = createContextLoader();        SpringContext.setApplicationContext(this.contextLoader.initWebApplicationContext(getServletContext()));    }}

調用

由于使用的都是靜態函數,使用getBean(Stirng name)或者getService(String serviceName)就可以獲得xml配置的業務自己bean。