tomcat session cookie 值设置，tomcat jsessionid设置

##调用request.getSession()

@Controller
@RequestMapping("/cookie")
public class CookieController {

    @RequestMapping("/tomcatRequest")
    @ResponseBody
    public String tomcatRequest(HttpServletRequest request) {
        String yym = request.getParameter("yym");
        request.getSession().setAttribute("key", yym);
        return yym;
    }

}

##源码

##请求中没有获取到jsessionid，新建值

##设置到response header

##reponse header写回客户端