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手动获取spring的ApplicationContext和bean对象

WEB项目:

方法1:

ApplicationContext ac1 = WebApplicationContextUtils.getRequiredWebApplicationContext(ServletContext sc)

 方法2:

ApplicationContext ac2 = WebApplicationContextUtils.getWebApplicationContext(ServletContext sc)

 方法3:

写一个工具类类继承ApplicationObjectSupport

 方法4:

写一个工具类类继承WebApplicationObjectSupport

 方法5:(推荐)

写一个工具类实现ApplicationContextAware接口

 示例:

import java.util.Map;import org.springframework.beans.BeansException;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;/** * 获取ApplicationContext和Object的工具类 * @author yzl * */@SuppressWarnings({ "rawtypes", "unchecked" })public class SpringContextUtils implements ApplicationContextAware {	private static ApplicationContext applicationContext;	public void setApplicationContext(ApplicationContext arg0)			throws BeansException {		applicationContext = arg0;	}	/**	 * 获取applicationContext对象	 * @return	 */	public static ApplicationContext getApplicationContext(){		return applicationContext;	}		/**	 * 根据bean的id来查找对象	 * @param id	 * @return	 */	public static Object getBeanById(String id){		return applicationContext.getBean(id);	}		/**	 * 根据bean的class来查找对象	 * @param c	 * @return	 */	public static Object getBeanByClass(Class c){		return applicationContext.getBean(c);	}		/**	 * 根据bean的class来查找所有的对象(包括子类)	 * @param c	 * @return	 */	public static Map getBeansByClass(Class c){		return applicationContext.getBeansOfType(c);	}}

 

 

非WEB项目

ApplicationContext ac = new FileSystemXmlApplicationContext("applicationContext.xml")

可选的操作方法有:

一:String[]   path={"WebRoot/WEB-INF/applicationContext.xml","WebRoot/WEB-INF/applicationContext_task.xml"};ApplicationContext context = new FileSystemXmlApplicationContext(path);二:String path="WebRoot/WEB-INF/applicationContext*.xml";ApplicationContext context = new FileSystemXmlApplicationContext(path);三:ApplicationContext ctx = new FileSystemXmlApplicationContext("classpath:地址");没有classpath的话就是从当前的工作目录

 

手动获取spring的ApplicationContext和bean对象