上下文可以替代注解， 但是注解更方便

package com.tgb.web.controller;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;import org.springframework.web.servlet.support.RequestContextUtils;@Controllerpublic class SpringController {//	@Resource(name="springService")//	private ISpring springService;		@RequestMapping("/spring/get")	public String get(HttpServletRequest request){		//spring的上下文		WebApplicationContext ac1 = WebApplicationContextUtils.getWebApplicationContext(request.getSession().getServletContext());		//springMVC的上下文		WebApplicationContext ac2 = RequestContextUtils.getWebApplicationContext(request);				//通过spring上下文拿到bean		//ISpring springService = (ISpring)ac1.getBean("springService");				//通过springMVC上下文拿到bean		ISpring springService = (ISpring)ac2.getBean("springService");		System.out.println(springService.get());		return "/success";	}}