简单获取Spring管理的bean

废话少说，直接上代码：

    1，编辑   SpringContextHolder.java

public class SpringContextHolder 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. 
	*/ 
	@Override
	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
		SpringContextHolder.applicationContext = applicationContext; // NOSONAR  
	}
	
	/** 
	* 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 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. 
	*/  
	@SuppressWarnings("unchecked")  
	public static  T getBean(Class clazz) {  
		checkApplicationContext();  
		return (T) applicationContext.getBeansOfType(clazz);  
	}  
	
	
	/** 
	* 清除applicationContext静态变量. 
	*/  
	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");  
		}  
	}  	
}

2,注入，在applicationContext.xml配置文件中加入：

3，使用

  

SpringContextHolder.getBean("beanName");

或者

SpringContextHolder.getBean("className");