[spring 3 mvc] 如何在controller类中获取到 request , session 对象？

p=415 在controller类中，获得request 或是 session 对象，在网上查了下，没看到比较清晰的示例，贴段代码在下面： package net.ly.controllers; import java.util.HashMap; import java.util.Map; import javax.servlet.http.HttpServletRequest; import org.springframework.ui.Model; import org.springframework.web.servlet.ModelAndView; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.context.ContextLoaderListener; @Controller public class HelloWorldController { @RequestMapping("/helloworld") public ModelAndView helloWord(){ String message = "Hello World, Spring 3.0! 你好！"; return new ModelAndView("helloworld", "message",message); } @RequestMapping(value="/hello",method=RequestMethod.GET) public ModelAndView hello(HttpServletRequest request){ String s = request.getParameter("oo"); System.out.println("-----------------------:"+s); String message = "Hello, Spring 3.0! 你好！"; Map mymap = new HashMap(); mymap.put("a1", "ab11"); mymap.put("a2", "ab22"); //return new ModelAndView("hello", "message", message); return new ModelAndView("hello",mymap); } @ModelAttribute void beforeInvokingHandlerMethod(HttpServletRequest request) { request.setAttribute("foo", "bar"); } @RequestMapping("/hello2") public @ResponseBody String home() { return "hello liuy"; //页面上显示 hello liuy } /** * 测试好的示例 （着重看那这个哈） * */ @ModelAttribute() //加上才能将request的内容带过来 @RequestMapping("/hello3") public ModelAndView hello3(HttpServletRequest request) { //request String s = request.getParameter("oo"); //session request.getSession().setAttribute("cc","testsession"); request.setAttribute("liuy", s); return new ModelAndView("hello3"); } } 加上@ModelAttribute()才可以将内容传输过来。当放置在方法参数中,@ModelAttribute将模型映射到具体属性; 也可以用他在方法级别上提供参考模型的数据.