<a target=_blank href=http://www.mamicode.com/"http://blog.csdn.net/is_zhoufeng/article/details/7559756" style="color: rgb(0, 0, 0); text-decoration: none; font-family: 'Microsoft YaHei'; font-size: 20px; line-height: 30px; ">springMVC中得到request对象，session对象>
RequestAttributes ra = RequestContextHolder.getRequestAttributes();  
		HttpServletRequest request = ((ServletRequestAttributes)ra).getRequest();  
		request.getSession().setAttribute(name, webuser);


(1)web.xml
 <session-config>
        <session-timeout>30</session-timeout>
 </session-config>
注：30指分钟

也可以让所有的Control继承一个BaseControl类 ，BaseControl类的定义为：
package com.jrgy.web.controller;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import com.jrgy.pojo.domain.FriendlyLink;
import com.jrgy.pojo.domain.ItemInfo;
import com.jrgy.pojo.domain.WebUser;
import com.jrgy.util.CacheManager;
import com.jrgy.util.Constants;
import com.jrgy.web.service.IAssociationManager;
import com.jrgy.web.service.IWebIndexManager;
import com.jrgy.web.service.IWebItemInfoManager;

public class BaseController implements Serializable{

	private static final long serialVersionUID = 8695834026800952113L;
	
	/**
	 * ????
	 * */

	
//
//	HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder
//			.getRequestAttributes()).getRequest();
	
	
	
	CacheManager cacheManager = CacheManager.getInstance();
	@Autowired
	IWebIndexManager webIndexManager;
	@Autowired
	IWebItemInfoManager webItemInfoManager;
	@Autowired
	IAssociationManager webAssociationManager;
	/**
	 * 导航栏
	 * */
	List<ItemInfo> listitemInfo = new ArrayList<ItemInfo>();
	
	/**
	 * 友情链接
	 * */
	List<FriendlyLink> friendLyLinkLs = new ArrayList<FriendlyLink>();
	
	
	List itmeCode = new ArrayList();
	Map map = new HashMap();
	
	/**
	 * ??????????
	 * @param Object ????????
	 * @param String KEY ?
	 * @return Object
	 * @throws Exception
	 */
	public Object getCache(Object object, String key) {
		Object cacheDate = cacheManager.get(key);
		if (cacheDate != null) {
			object = cacheDate;
		}
		return object;
	}

	/**
	 * 
	 * @param key
	 * @param Object
	 * @return void
	 * @throws Exception
	 */
	public void addCache(String key, Object object) {
		cacheManager.delCacheByKey(key);
		cacheManager.add(key, object);
	}
	
	public void addSessionWebUser(String name,WebUser webuser) {
		RequestAttributes ra = RequestContextHolder.getRequestAttributes();  
		HttpServletRequest request = ((ServletRequestAttributes)ra).getRequest();  
		request.getSession().setAttribute(name, webuser);
		
	}
	public Object getWebUserAttribute(String name) {
		// TODO Auto-generated method stub
		RequestAttributes ra = RequestContextHolder.getRequestAttributes();  
		HttpServletRequest request = ((ServletRequestAttributes)ra).getRequest();  
		Object obj=null;
		if (!name.trim().equals("")) {
			obj= request.getSession().getAttribute(name);
		}
		
		return obj;
	}
}
这样 ，每个Control就能够方便的得到Servlet API 中的对象了。

 登陆保存用户到session
@RequestMapping("/islogin.do")
	public void islogin(HttpServletRequest request, HttpServletResponse response){
		String sessionId = request.getSession().getId();
		response.setContentType("text/html;charset=utf-8");
		String userName = request.getParameter("userName");
		String passWord = request.getParameter("userPassWord");
		WebUser webuser=new WebUser();
		String Msg = null;
		try {
		if(!StrUtil.checkStr(userName)){
			Msg="2";
		}else if(!StrUtil.checkStr(passWord)){
			Msg="3";
		}
		else{
			
				webuser=mainWebUserManager.userLogin(userName,passWord);
				if (webuser!=null) {
					if(Constants.webUserStruts.equals(webuser.getWebUserType())){
						Msg = "5";
					}else{
						Msg = "1";	
						addSessionWebUser(Constants.LOGIN_WebUSER,webuser);
							log.debug(userName+"");
					}
				}
				else{
					Msg = "4";	
				}
		}			
		PrintWriter out = response.getWriter();
		String outMsg = "{Msg:"+Msg+"}";
		out.print(outMsg);
		out.flush();
		out.close();
		} catch (Exception e) {
		e.printStackTrace();
		}
		
	}

在需要使用session以下代码：
	                String name=Constants.LOGIN_WebUSER;
			WebUser web=(WebUser) getWebUserAttribute(name);
			if (web!=null) {
				currentUser=web.getWebUserName();
				
			}





springMVC 获取request 处理全局session业务