OAF_开发系列19_实现OAF对话框提示dialogPage

if ("APPROVED".equals(status)){
            OAException mainMessage = new OAException("对已审批状态的采购方案进行更新，将导致版本升级，并需要重新审批，请确认是否进行更新？");
        
            OADialogPage dialogPage = new OADialogPage(OAException.WARNING,
            mainMessage, null, "", "");
            
            dialogPage.setOkButtonItemName("UpdateYesButton");
            dialogPage.setOkButtonToPost(true);
            dialogPage.setNoButtonToPost(true);
            dialogPage.setPostToCallingPage(true);
            dialogPage.setOkButtonLabel("更新");
            dialogPage.setNoButtonLabel("取消");
            pageContext.redirectToDialogPage(dialogPage);
        }