Spring中实现加载某一个层的类方法

[color=green][/color][size=medium]/**
* 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");
}
}
}[/color][/size]