Spring中实现加载某一个层的类方法

[/color]/**
* 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.
* 注意：此类的Bean定义所在的applicationContext*.xml文件必须设置default-lazy-init="false"或者定义 Springs
* <bean/>的属性lazy-init="false"
* /
public class Springs 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.
     */
    public void setApplicationContext(ApplicationContext applicationContext) {

        Springs.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. 如果同Class类型配置了多个Bean，只返回第一个
     */
    @SuppressWarnings("unchecked")
    public static <T> T getBean(Class<T> clazz) {

        checkApplicationContext();
        Map beans = applicationContext.getBeansOfType(clazz);
        return (T) Collections.first(beans.values());
    }
   
 
   
    public static String getMessage(String code, Object... args) {

        return getMessage(code, Locale.CHINA, args);
    }
   
    // @SuppressWarnings("unchecked")
    // public static <T> T createBean(Class<T> beanClass, String beanName) {
    //
    // AutowireCapableBeanFactory af = Springs.getApplicationContext()
    // .getAutowireCapableBeanFactory();
    // return (T) af.createBean(beanClass, AutowireCapableBeanFactory.AUTOWIRE_BY_NAME, true);
    // }
   
    private static void checkApplicationContext() {

        if (applicationContext == null) {
            throw new IllegalStateException(
                    "applicaitonContext未注入,请在applicationContext.xml中定义Springs");
        }
    }
}