SpringContextHolder.java

package com.cl.privilege.utils;


import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

public class SpringContextHolder implements ApplicationContextAware {
	
	private static ApplicationContext applicationContext;
	
	public void setApplicationContext(ApplicationContext ac)
	{
		applicationContext = ac;
	}

	public static ApplicationContext getApplicationContext()
	{
		checkApplicationContext();
		return applicationContext;
	}

	@SuppressWarnings("unchecked")
	public static <T> T getBean(String name)
	{
		checkApplicationContext();
		return (T) applicationContext.getBean(name);
	}

	public static <T> T getBean(Class<T> requiredType)
	{
		checkApplicationContext();
		return applicationContext.getBean(requiredType);
	}

	public static void cleanApplicationContext()
	{
		applicationContext = null;
	}

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

}