技术问答jsp鐨剆ession.getAttribute()鎬庝箞浣跨敤 - 扬州沐宇科技

session.getAttribute()鏂规硶鐢ㄤ簬浠庝細璇濅腑鑾峰彇瀛樺偍鐨勫璞°€傚畠鐨勪娇鐢ㄦ柟娉曞涓嬶細

HttpSession session = request.getSession();

鐒跺悗锛屼娇鐢╯ession.getAttribute()鏂规硶鏉ヨ幏鍙栧瓨鍌ㄥ湪浼氳瘽涓殑瀵硅薄銆傝鏂规硶鎺ュ彈涓€涓弬鏁帮紝鍗宠鑾峰彇鐨勫璞＄殑鍚嶇О銆傚涓嬫墍绀猴細

Object obj = session.getAttribute("attributeName");

鍏朵腑锛?quot;attributeName"鏄瓨鍌ㄥ璞℃椂璁剧疆鐨勫悕绉般€?/p>

if (obj != null) {
// 瀵硅薄瀛樺湪锛岃繘琛岀被鍨嬭浆鎹?/span>
String attributeValue = (String) obj;
// 杩涜鍚庣画鐨勬搷浣?/span>
} else {
// 瀵硅薄涓嶅瓨鍦紝杩涜鐩稿簲鐨勫鐞?/span>
}

琛ュ厖璇存槑锛氳幏鍙栧埌鐨勫瓨鍌ㄥ璞＄被鍨嬪彲鑳芥槸浠绘剰绫诲瀷锛屽洜姝ゅ湪杩涜绫诲瀷杞崲鏃讹紝闇€瑕佹敞鎰忕被鍨嬬殑鍖归厤锛岄伩鍏嶅嚭鐜癈lassCastException寮傚父銆?/p>