OAF 返回供应商门户主页

        if (pageContext.getParameter("returnHomePage") != null) {
            pageContext.setForceForwardURL("POS_HOME", 
                                           OAWebBeanConstants.KEEP_MENU_CONTEXT, 
                                           null, null, false, 
                                           OAWebBeanConstants.ADD_BREAD_CRUMB_YES, 
                                           OAWebBeanConstants.IGNORE_MESSAGES);
        }