Spring的ApplicationContext加载在没有继承的地方加载持久化对象

public class ServiceLocator
{

private static ApplicationContext applicationContext; //Spring应用上下文环境
//下面的这个方法上加了@Override注解，原因是继承ApplicationContextAware接口是必须实现的方法

public static ApplicationContext getContext()
{
return applicationContext;
}

public static Object getBean(String name)
{
return applicationContext.getBean(name);
}

public static void setApplicationContext(ApplicationContext applicationContext){
ServiceLocator.applicationContext = applicationContext;
}

}

public class StartupServlet extends HttpServlet {

/**
* 描述
*/

private static final long serialVersionUID = 6871531526585981445L;

public void init() throws ServletException {
//将applicationContext放入ServiceLocator
ApplicationContext ctx = WebApplicationContextUtils
.getRequiredWebApplicationContext(this.getServletContext());
ServiceLocator.setApplicationContext(ctx);
}
}