tomcat 多项目session配置

1 修改tomcat的conf目录下的context.xml
<Context sessionCookiePath="/" sessionCookieName="cysessionid" crossContext="true">

2 获取session

ServletContext servletContext = request.getServletContext().getContext("/");//session对应的servlet path
try {
if (servletContext instanceof ApplicationContextFacade) {
// get ApplicationContextFacade context=>ApplicationContext
if (sApplicationContexField == null) {
sApplicationContexField = ApplicationContextFacade.class.getDeclaredField("context");
sApplicationContexField.setAccessible(true);
}
ApplicationContext applicationContext=(ApplicationContext) sApplicationContexField.get(servletContext);

            // get ApplicationContext context=>StandardContext
            if(sStandardContextField ==null){
                sStandardContextField = ApplicationContext.class.getDeclaredField("context");
                sStandardContextField.setAccessible(true);
            }
            StandardContext standardContext= (StandardContext) sStandardContextField.get(applicationContext);

            // get Session Manager
            Session session= standardContext.getManager().findSession(request.getSession().getId());
            if(session!=null&&session.isValid()){
                return (String) session.getSession().getAttribute(Resource.SESSION_ATTRIBUTE_USRNAME);
            }
        }
    } catch (Exception e) {
        logger.error("getAccountServerSessionUser: error!",e);
    }