一、前言

这边分别通过ServletContextListener容器启动时初始化获取Spring ApplicationContext上下文、主动注入指定Spring的xml配置文件获取其Spring ClassPathXmlApplicationContext上下文两个不同方式，获取各自Spring上下文的bean对象getBean方法，详情参见代码示例说明。

二、代码示例

1.ServletContextListener监听方式

<listener>@b@    <listener-class>com.xwood.pms.util.SpringContext</listener-class>@b@</listener>

package com.xwood.pms.util.SpringContext;@b@@b@import javax.servlet.ServletContextEvent;@b@import javax.servlet.ServletContextListener;@b@@b@import org.springframework.context.ApplicationContext;@b@import org.springframework.web.context.support.WebApplicationContextUtils;@b@@b@public class SpringContext implements ServletContextListener {@b@	@b@	private static ApplicationContext beanContext = null;@b@@b@	public static Object getBean(String beanId) {@b@		return beanContext.getBean(beanId);@b@	}@b@@b@	@Override@b@	public void contextDestroyed(ServletContextEvent arg0) {@b@		beanContext=null;@b@	}@b@@b@	@Override@b@	public void contextInitialized(ServletContextEvent event) {@b@		beanContext = WebApplicationContextUtils.getWebApplicationContext(event@b@				.getServletContext());@b@		@b@	}@b@}

2.ClassPathXmlApplicationContext方式

import org.springframework.beans.BeansException;@b@import org.springframework.beans.factory.config.BeanFactoryPostProcessor;@b@import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;@b@import org.springframework.context.support.ClassPathXmlApplicationContext;@b@@b@ @b@public class SpringBean {@b@@b@	public static ClassPathXmlApplicationContext context;@b@	private static String  _paramString;@b@	private static Object  _paramObject;@b@	@b@	static{@b@		 context = new ClassPathXmlApplicationContext("classpath:test/applicationContext.xml");@b@	}@b@	@b@	public  static  void  registerSingleton(String paramString, Object paramObject){@b@		_paramString=paramString;@b@		_paramObject=paramObject;@b@		context.addBeanFactoryPostProcessor(new BeanFactoryPostProcessor(){@b@			@Override@b@			public void postProcessBeanFactory(@b@					ConfigurableListableBeanFactory beanFactory)@b@					throws BeansException {@b@				beanFactory.registerSingleton(_paramString,_paramObject);@b@			};@b@		@b@		});@b@	}@b@	@b@	public static Object getBean(String id){@b@		return (Object)context.getBean(id);@b@	}@b@	@b@}

3. FileSystemXmlApplicationContext方式

import org.springframework.context.ApplicationContext;@b@import org.springframework.context.support.FileSystemXmlApplicationContext;@b@ @b@public class SpringBean {@b@@b@	public static ApplicationContext context;@b@	@b@	static{@b@	 	  String path = SpringBean.class.getClassLoader().getResource("").getPath();@b@		  context= new FileSystemXmlApplicationContext(path+"/applicationContext.xml"); @b@	}@b@	@b@	public static Object getBean(String id){@b@		return (Object)context.getBean(id);@b@	}@b@	@b@}