Servlet鐨勫熀紜姒傚康
1.聽 Servlet鏄粈涔?
絳旓細1) 妯″潡鍖栫殑紼嬪簭錛岃繍琛屽湪鏈嶅姟鍣ㄧ錛屽寮轟簡璇鋒眰/鍝嶅簲瀵煎悜鏈嶅姟;
聽聽聽 2) 搴旂敤紺轟緥錛?br />聽聽聽聽聽聽 a. 璁塊棶榪滅瀵硅薄;
聽聽聽聽聽聽 b. 璺熻釜澶ч噺淇℃伅;
聽聽聽聽聽聽 c. 澶氱敤鎴峰崗浣?/p>
2.聽 HTTP鍜孲ervlets
絳旓細1) Servlet鏄疕TTP鍗忚涓綔涓篊GI鐨勪竴涓浛浠ｅ搧;
聽聽聽 2) HttpServlet綾葷敤浜庡紑鍙慔TTP涓哄熀紜鐨凷ervlet
3.聽 HttpServlet
絳旓細1) 緇ф壙鎶借薄綾籮avax.servlet.GenericServlet錛屽疄鐜版帴鍙ava.io.Serializable;
聽聽聽 2) 鐢ㄤ互寮鍙慔ttp鍗忚涓哄熀紜鐨凷ervlet
4.聽 鏈嶅姟鏂規硶
絳旓細1) 姣忓綋鏈嶅姟鎺ユ敹鍒板Servlet鐨勮姹傛椂錛屾湇鍔″櫒灝變細浜х敓涓涓柊綰跨▼錛屽茍璋冪敤Service銆俿ervice鏂規硶媯鏌TTP璇鋒眰綾誨瀷(GET銆丳OST銆丳UT銆丏ELETE絳?,騫剁浉搴斿湴璋冪敤doGet銆乨oPost銆乨oPut銆乨oDelete絳夈?br />聽聽聽 2) doGet/doPost鏂規硶鎺ユ敹HttpServletRequest鍜孒ttpServletResponse瀵硅薄銆?br />聽聽聽 3) 99%鐨勬椂闂撮噷錛屽彧闇娉ㄦ剰GET鍜?鎴朠OST璇鋒眰;
聽聽聽 4) 娌℃湁浠諱綍doHead鏂規硶銆?/p>
5.聽 榪斿洖鍝嶅簲
絳旓細1) PrintWriter out = response.getWriter聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 // 鐢ㄤ簬榪斿洖鏂囨湰鏁版嵁緇欏鎴風
聽聽聽 2) ServletOutputStream out = response.getOutputStream聽聽 // 鐢ㄤ簬榪斿洖浜岃繘鍒舵暟鎹粰瀹㈡埛绔?/p>
6.聽 鏀寔Servlet鐨刉eb鏈嶅姟鍣?br />絳旓細1) J2EE搴旂敤鏈嶅姟鍣ㄥ寘鎷細Web Container鍜孍JB Container;
聽聽聽 2) Web Container鐨凷ervlet Engine鎻愪緵瀵筍ervlet鐨勮繍琛屾敮鎸?
聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽
2004-9-17聽聽聽聽聽 鏄熸湡浜斅犅犅犅犅?鏅?
鐢⊿ervlet澶勭悊琛ㄥ崟鏁版嵁
1. Form鍏冪礌鐨勫睘鎬?br />絳旓細1) ACTION: 鐢ㄦ潵鎸囧畾瑕佸鐞咶ORM鏁版嵁鐨凷ervlet鐨刄RL錛屼篃鍙互鎸囧畾FORM鏁版嵁灝嗚鍙戦佸埌鐨勭數瀛愰偖浠?
聽聽聽 2) METHOD: 鎸囧畾鏁版嵁浼犻佺粰HTTP鏈嶅姟鍣ㄧ殑鏂規硶;
聽聽聽 3) ENCTYPE: 鎸囧畾鏁版嵁鍦ㄤ紶杈撲箣鍓嶈繘琛岀紪鐮佺殑鏂瑰紡, 渚媘ultipart/form-data 緙栫爜灝嗘瘡涓瓧孌典綔涓篗IME鍙吋瀹圭殑鏂囨。鐨勫崟鐙儴鍒嗕紶杈撱?/p>
2. 瑙ｆ瀽璇鋒眰
絳旓細1) 瀵逛簬鎵鏈夌殑璇鋒眰錛?br />聽聽聽聽聽聽 a. getParameterNames: 浠numeration褰㈠紡鑾峰彇琛ㄥ崟涓竻鍗? 姣忎竴欏歸兘鍙互杞崲鎴怱tring;
聽聽聽聽聽聽 b. getParameter: 榪斿洖琛ㄥ崟涓弬鏁板悕(鍖哄垎澶у皬鍐?瀵瑰簲鐨勫?娌℃湁榪欐牱鐨勫弬鏁幫紝榪斿洖null;娌℃湁浠諱綍鍊鹼紝榪斿洖絀篠tring);
聽聽聽聽聽聽 c. getParameterValues: 榪斿洖琛ㄥ崟涓弬鏁板悕(鍖哄垎澶у皬鍐?瀵瑰簲鐨勫瓧絎︿覆鏁扮粍(娌℃湁榪欐牱鐨勫弬鏁幫紝榪斿洖null;鍙湁涓涓鹼紝榪斿洖鍊間負鍗曚竴鍏冪礌緇?;
Servlet鐨勭敓鍛藉懆鏈?/p>
1.聽 Servlet鐨勭敓鍛藉懆鏈?br />絳旓細1) 閫氳繃web Container瑁呰澆(J2EE鐨勭粍浠墮兘鏄鍔ㄥ湴瑁呰澆鍏ontainer)騫跺疄渚嬪寲Servlet瀵硅薄;
聽聽聽 2) 璋冪敤init()鏂規硶(鍦ㄦ暣涓敓鍛藉懆鏈熶腑鍙璋冪敤涓嬈?;
聽聽聽 3) 璋冪敤service()鏂規硶(鍦ㄦ暣涓敓鍛藉懆鏈熶腑鍙璋冪敤澶氭);
聽聽聽 4) 璋冪敤destroy()鏂規硶(鍦ㄦ暣涓敓鍛藉懆鏈熶腑鍙璋冪敤涓嬈?;
2.聽 init鏂規硶
絳旓細1) 褰撻嬈″垱寤篠ervlet鏃跺氨浼氳皟鐢╥nit鏂規硶, 鑰屼笉鏄瘡涓敤鎴瘋姹傞兘浼氳皟鐢ㄨ鏂規硶銆?br />聽聽聽 2) 闄ら潪琚玠estroy鏂規硶縐婚櫎錛屽惁鍒欎笉鑳借閲嶈澆;
聽聽聽 3) init鏂規硶涓緇撴潫錛宻ervlet鍗沖彲鎺ュ彈瀹㈡埛绔姹?
聽聽聽
3.聽 init鏂規硶瀹炰緥
絳旓細1) 鍦ㄧ紪鍐欐帴鍙桽ervletConfig浣滀負鍙傛暟鐨刬nit鏂規硶鏃訛紝搴旇鎬繪槸鍦ㄩ琛岃皟鐢╯uper.init;
聽聽聽 2) init鏂規硶鎺ュ彈ServletConfig浣滀負鍙傛暟, 鐢ㄤ互涓嬫柟娉曡幏寰楀弬鏁板鹼細
聽聽聽聽聽聽 a. getInitParameter: 榪斿洖鎸囧畾鍙傛暟鍚嶇О瀵瑰簲鐨勫鹼紝濡傛灉鍙傛暟涓嶅瓨鍦紝榪斿洖null;
聽聽聽聽聽聽 b. getInitParameterNames: 榪斿洖鎸囧畾鍙傛暟鍚嶇О瀵瑰簲鐨勫兼灇涓撅紝濡傛灉鍙傛暟涓嶅瓨鍦紝榪斿洖鐨勭┖鏋氫婦;
2004-9-20聽聽聽聽聽 鏄熸湡涓聽聽聽聽聽 闃?/p>
3.聽 service鏂規硶
絳旓細1) 姣忓綋鏈嶅姟鍣ㄦ帴鏀跺埌瀵筍ervlet鐨勮姹傛椂錛屾湇鍔″櫒灝變細浜х敓涓涓柊綰跨▼, 騫惰皟鐢╯ervice銆俿ervice鏂規硶媯鏌TTP璇鋒眰綾誨瀷錛岃鐩稿簲鍦拌皟鐢╠oGet銆乨oPost銆乨oPut銆乨oDelete銆?br />聽聽聽 2) 琚玞ontainer璋冪敤鍘誨搷搴?ServletResponse)鏉ヨ嚜瀹㈡埛绔殑璇鋒眰(ServletRequest);
4.聽 Servlets鐨勫綰跨▼瀹夊叏
絳旓細1) 澶氱嚎紼嬪崰鐢ㄨ祫婧愬皯錛屽鐞嗛熷害蹇紝鎻愰珮浜嗘晥鐜囥?br />聽聽聽 2) 涓浜涚紪鐮佸緩璁細
聽聽聽聽聽聽 a. 瀵瑰彉閲忓拰鏂規硶瀹氫箟閫傚綋鐨勮闂柟寮? 渚嬪鍗曠函鍙栧兼搷浣滀笉浼氭湁澶氱嚎紼嬪畨鍏ㄩ棶棰?
聽聽聽聽聽聽 b. 鍚屾鍖栨墍鏈夎闂噸瑕佹暟鎹殑瀹炰緥鍙橀噺;
聽聽聽聽聽聽 c. 鍒涘緩璁塊棶綾誨彉閲忕殑璁塊棶鏂規硶銆?/p>
5.聽 SingleThreadModel鎺ュ彛
絳旓細1) 濡傛灉甯屾湜紱佹澶氱嚎紼嬭闂紝鍙互璁㏒ervlet浣跨敤SingleThreadModel鎺ュ彛:
聽聽聽聽聽聽 public class YourServlet extends HttpServlet implements SingleThreadModel{
聽聽聽聽聽聽 ...
聽聽聽聽聽聽 }
聽聽聽 2) 浣跨敤姝ゆ帴鍙ｏ紝緋葷粺灝嗕繚璇佷笉浼氬瓨鍦ㄥ涓姹傜嚎紼嬪悓鏃惰闂甋ervlet鐨勫崟涓疄渚嬨備絾鏄粛鐒墮渶瑕佸悓姝ュ瀛樺偍鍦⊿ervlet澶栭儴鐨勭被鍙橀噺鎴栧叡浜瓧孌電殑璁塊棶銆?br />聽聽聽 3) 濡係ervlet棰戠箒琚闂紝鍒橲ervlet璁塊棶鐨勫悓姝ュ皢涓ラ噸褰卞搷鎬ц兘(寤舵椂)銆?/p>
6.聽 destroy鏂規硶
絳旓細1) 鏈嶅姟鍣ㄥ喅瀹氬垹闄ゅ凡緇忓姞杞界殑Servlet瀹炰緥涔嬪墠灝嗚皟鐢⊿ervlet鐨刣estroy鏂規硶;
聽聽聽 2) 璇ユ柟娉曞厑璁窼ervlet:
聽聽聽聽聽聽 a. 鍏抽棴鏁版嵁搴撹繛鎺?
聽聽聽聽聽聽 b. 涓鍚庡彴綰跨▼;
聽聽聽聽聽聽 c. 灝咰ookie紼嬪簭娓呭崟鎴栬闂鏁板啓鍒扮鐩樹互鍙婃墽琛屽叾浠栫被浼肩殑鏀跺熬宸ヤ綔銆?/p>
7. 鍦⊿ervlet緇堟鏃跺鐞哠ervice綰跨▼
絳旓細1) 鍦╠estroy()鏂規硶涓細濡傛湁鏈嶅姟(閫氳繃涓涓悓姝ュ寲鐨勫疄渚嬫柟娉曞彇寰楀綋鍓嶇嚎紼嬫暟澶т簬0)錛屽垯緗叧闂姸鎬佷負true(閫氳繃涓涓悓姝ュ寲鐨勫疄渚嬫柟娉曞疄鐜?銆傜劧鍚庡驚鐜瓑寰呮湇鍔＄嚎紼嬫暟涓?.
聽聽聽 2) 鍦⊿ervice()鏂規硶涓? 濡傝鍏抽棴鐘舵佷負true錛屼究涓嶆墽琛屽叿浣撻昏緫鏂規硶錛岀洿鎺ラ鍑恒?/p>
2004-9-21聽聽聽聽聽 鏄熸湡浜屄犅犅犅犅?鏅?/p>
璧勬簮璁塊棶
1. 鍒嗗竷寮廕AVA鎶鏈?br />絳旓細1) JDBC;
聽聽聽聽聽聽 a. 瀹炵幇浜咲ata鍜孋lient鐨勫垎寮;
聽聽聽聽聽聽 b. 閫氳繃綆鍗曠殑閰嶇疆鍙互閫傜敤涓嶅悓縐嶇被鐨勬暟鎹簱銆?br />聽聽聽 2) RMI(RMI浣跨敤鐨勫崗璁負Internet Inter ORB Protocol);
聽聽聽 3) CORBA(鏍稿績鎶鏈負ORB錛氱浉搴旂殑浣犵殑璇鋒眰杞負鍙︿竴涓墿鐞嗗湴鍧鍙︿竴涓笉鍚岃璦瀵硅薄鐨勮姹傘傜函Java鐨勬儏鍐典笅鏍規湰涓嶇敤CORBA);
2.聽 杞彂緇撴灉鑷沖彲瑙嗛〉闈?br />絳旓細1) 鐢↗avaBean(鐢ㄦ潵瑁呰澆涓緇勫鹼紝閬典粠涓瀹氬崗璁殑class)灝佽緇撴灉;
聽聽聽 2) 姣忎釜JVM涓殑姣忎竴涓簲鐢ㄧ▼搴忛噷閮藉瓨鍦ㄤ竴涓笂涓嬫枃;
聽聽聽 3) servletContext鍦╯ervletConfig鐨勫璞′腑;
聽聽聽 4) ServletContext.getRequestDispatcher(String path)錛氳繑鍥炰竴涓猂equestDispatcher
聽聽聽 5) 閫氳繃RequestDispatcher鐨刦orward()鎴杋nclude()鏂規硶浼犻佽姹傘?/p>
3. 杞彂璇鋒眰鑷蟲柊鐨勮祫婧?br />絳旓細1) request dispatcher鐨勪簩縐嶄紶閫佽姹傛柟寮?br />聽聽聽聽聽聽 a. Forward: 灝嗚姹備粠涓涓猻ervlet浼犲埌鏈嶅姟鍣ㄤ笂鐨勫叾浠栬祫婧?servlet銆丣SP銆丠TML);
聽聽聽聽聽聽 b. Include: 鍖呮嫭闈欐佹垨鍔ㄦ佸唴瀹?
聽聽聽 2) 鑾峰緱request dispatcher鐨勪簩縐嶆柟寮忥細
聽聽聽聽聽聽 a. ServletRequest.getRequestDispatcher()聽聽聽聽聽聽 // 鐩稿璺緞
聽聽聽聽聽聽 b. ServletContext.getRequestDispatcher()聽聽聽聽聽聽 // 緇濆璺緞
聽聽聽 3) 鍥涚璧勬簮鑼冨洿
聽聽聽聽聽聽 a. javax.servlet.ServletContext: 鏁翠釜搴旂敤紼嬪簭鑼冨洿鍐?
聽聽聽聽聽聽 b. javax.servlet.http.HttpSession: 浼氳瘽鏈熼棿;
聽聽聽聽聽聽 c. javax.servlet.ServletRequest: 涓涓姹傛湡闂?
聽聽聽聽聽聽 d. javax.servlet.jsp.PageContext: 涓涓狫SP欏甸潰;
2004-9-22聽聽聽聽聽 鏄熸湡涓壜犅犅犅犅?鏅?/p>
Servlets涓殑鎸佷箙鐘舵?/p>
1. HTTP鍗忚涓棤鐘舵佺殑浼樼己鐐癸細
絳旓細浼樼偣錛氬彲浠ユ湇鍔″緢澶氬鎴風;
聽聽聽 緙虹偣錛氫笉鑳藉湪澶氫釜璇鋒眰涔嬮棿鍏變韓淇℃伅(閫氳繃Cookie鍜孲ession瑙ｅ喅);
2. Cookies
絳旓細1) Cookies鏄疻eb鏈嶅姟鍣ㄥ彂閫佸埌嫻忚鍣ㄧ殑綆鐭枃鏈俊鎭紝浠ュ悗鍦ㄨ闂悓涓涓猈eb绔欑偣鎴栧煙鏃舵祻瑙堝櫒灝變細姣棤鏇存敼鍦拌繑鍥炶鏂囨湰淇℃伅銆?br />聽聽聽 2) 鐢ㄦ埛鍙互鍐沖畾鏄惁鎺ュ彈Cookie銆?br />聽聽聽 3) 涓涓狢ookie鐢變互涓嬪唴瀹圭粍鎴愶細
聽聽聽聽聽聽 a. 鍚嶇О;
聽聽聽聽聽聽 b. 鍗曚釜鍊?
聽聽聽聽聽聽 c. 涓浜涙搷浣滃睘鎬э細璺緞鎴栨墍鍦ㄥ煙銆佹湁鏁堟湡浠ュ強鐗堟湰鍙楓?br />聽聽聽 4) 姣忎釜绔欑偣錛屾祻瑙堝櫒閫氬父鍙帴鍙?0鏉ookie,鎬誨叡鎺ュ彈300鏉★紝浠ュ強姣忔潯Cookie闄愬埗涓?KB銆?/p>
3.聽 璁劇疆Cookie
絳旓細1) 鍒涘緩Cookie:
聽聽聽聽聽聽 Cookie c = new Cookie("CookieName", "CookieValue");
聽聽聽 2) 璁劇疆鏈夋晥鏈燂細
聽聽聽聽聽聽 c.setMaxAge(int lifetime); 榛欒涓鴻礋鍊鹼紝鍙綔鐢ㄤ簬褰撳墠浼氳瘽錛屼笉鑳藉瓨鍌ㄥ湪紓佺洏涓?濡備負0鍊艱〃紺哄垹闄ookie錛涙湁鏁堝間負縐掍負鍗曚綅銆?br />聽聽聽 3) 鍦ㄥ搷搴斿ご涓斁緗瓹ookie:
聽聽聽聽聽聽 response.addCookie(c);
聽聽聽 4) 浠庡鎴風璇誨彇Cookie:
聽聽聽聽聽聽 Cookie[] cookies = request.getCookies();
聽聽聽聽聽聽 Cookie cookie;
聽聽聽聽聽聽 for(int i=0; i<cookies.length; i++)
聽聽聽聽聽聽 {
聽聽聽聽聽聽聽聽聽 cookie = cookies[i];
聽聽聽聽聽聽聽聽聽 out.println("<tr><td>" + cookie.getName() + "</td><td>" + cookie.getValue());
聽聽聽聽聽聽 }
4. Sessions
絳旓細1) 涓涓鎴風鍜屼竴涓湇鍔″櫒绔竴嬈¤繛鎺ヤ俊鎭殑鎵鏈夐泦鍚堬紝閫氳繃brower鍙戝嚭錛岀敱鏈嶅姟鍣ㄧ鐨剆ervlet璋冪敤;
聽聽聽 2) 鎻愪緵涓縐嶆柟寮忓湪澶氫釜欏甸潰璇鋒眰闂寸‘璁ょ敤鎴鋒垨鑰呭偍瀛樺叧浜庣敤鎴風殑淇℃伅;
聽聽聽 3) 瀹炵幇浼氳瘽璺熻釜鐨勪笁縐嶆柟寮忥細a. cookie; b. URL閲嶅啓; c. 闅愯棌鐨勮〃鍗曟
5. 璁劇疆Sessions
絳旓細1) 鍒涘緩Sessions:
聽聽聽聽聽聽 HttpSession session = request.getSession(true);聽聽聽聽聽 // true琛ㄧず濡備笉瀛樺湪鍒欏垱寤轟竴涓柊鐨剆ession
聽聽聽 2) 鐢ㄦ寚瀹氬悕縐板皢涓涓璞＄粦瀹氬埌session:
聽聽聽聽聽聽 public void setAttribute(String name, Object value);
聽聽聽 3) 鍒犻櫎涓庢寚瀹氬悕縐扮浉鍏崇殑鎵鏈夊鹼細
聽聽聽聽聽聽 public void removeAttribute(String name);
聽聽聽 4) 榪斿洖浼氳瘽涓墍鏈夊睘鎬у悕
聽聽聽聽聽聽 public Enumeration getAttributeNames();
聽聽聽 5) 榪斿洖鎸囧畾鍚嶇О瀵硅薄
聽聽聽聽聽聽 public Object getAttribute(String name);
6. Cookies鍜孲essions鐨勬瘮杈?br />絳旓細1) Cookies鍙敱鐢ㄦ埛鍐沖畾鏄惁闇瑕? Sessions涓嶈兘;聽
聽聽聽 2) Cookies鏄竴縐嶈杞絪essionID鐨勫彲鑳?
聽聽聽 3) Cookies瀛樺偍鍦ㄥ鎴風, Sessions瀛樺偍浜庢湇鍔″櫒绔?
聽聽聽 4) Cookies鍙互鏋勯狅紝鍙互鐢盧equest鍙栧嚭錛岀敱Response榪斿洖
2004-9-23聽聽聽聽聽 鏄熸湡鍥浡犅犅犅犅?鏅?/p>
榪囨護鍣?/p>
1.聽 浠涔堟槸榪囨護鍣?
絳旓細涓嶴ervlet鐩鎬技錛岃繃婊ゅ櫒鏄竴浜沇eb搴旂敤紼嬪簭緇勪歡錛屽彲浠ョ粦瀹氬埌涓涓猈eb搴旂敤紼嬪簭妗ｆ涓備絾鏄笌鍏朵粬Web搴旂敤紼嬪簭緇勪歡涓嶅悓鐨勬槸錛岃繃婊ゅ櫒鏄滈摼鈥濆湪瀹瑰櫒鐨勫鐞嗚繃紼嬩腑鐨勩傝繖灝辨剰鍛崇潃瀹冧滑浼氬湪servlet澶勭悊鍣ㄤ箣鍓嶈闂竴涓繘鍏ョ殑璇鋒眰錛屽茍涓斿湪澶栧彂鐨勫搷搴斾俊鎭繑鍥炲埌瀹㈡埛鍓嶈闂繖浜涘搷搴斾俊鎭傝繖縐嶈闂嬌寰楄繃婊ゅ櫒鍙互媯鏌ュ茍淇敼璇鋒眰鍜屽搷搴旂殑鍐呭銆?/p>
2.聽 榪囨護鍣ㄥ彲浠ョ敤浜庯細
絳旓細1) 涓轟竴涓猈eb搴旂敤紼嬪簭鐨勬柊鍔熻兘寤虹珛鍘熷瀷(鍙娣誨姞鍒癢eb搴旂敤紼嬪簭涓垨鑰呬粠Web搴旂敤紼嬪簭涓垹闄よ屼笉闇閲嶅啓鍩哄眰搴旂敤紼嬪簭浠ｇ爜);
聽聽聽 2) 鍚戣繃鍘葷殑浠ｇ爜涓坊鍔犳柊鍔熻兘銆?/p>
3.聽 榪囨護鍣ㄦ斁鍦ㄥ鍣ㄧ粨鏋勪粈涔堜綅緗紵
絳旓細榪囨護鍣ㄦ斁鍦╓eb璧勬簮涔嬪墠錛屽彲浠ュ湪璇鋒眰鎶佃揪瀹冩墍搴旂敤鐨刉eb璧勬簮(鍙互鏄竴涓猻ervlet銆佷竴涓狫SP欏甸潰錛岀敋鑷蟲槸涓涓狧TML欏甸潰榪欐牱鐨勯潤鎬佸唴瀹?涔嬪墠鎴幏榪涘叆鐨勮姹傦紝騫朵笖鍦ㄥ畠榪斿洖鍒板鎴蜂箣鍓嶆埅鑾瘋緭鍑鴻姹傘?/p>
4.聽 榪囨護鍣ㄧ殑瀛樻椿鍛ㄦ湡
絳旓細榪囨護鍣ㄦ湁鍥涗釜闃舵(涓巗ervlet綾諱技)錛?br />聽聽聽 1) 瀹炰緥鍖?
聽聽聽 2) 鍒濆鍖?璋冪敤init()鏂規硶);
聽聽聽 3) 榪囨護(璋冪敤doFilter()鏂規硶);
聽聽聽 4) 閿姣?璋冪敤destroy()鏂規硶);
5. 榪囨護鍣ㄧ被鍜屾帴鍙?br />絳旓細鎵鏈夌殑榪囨護鍣ㄩ兘蹇呴』瀹炵幇javax.servlet.Filter鎺ュ彛:
聽聽聽 1) 瀹瑰櫒璋冪敤init()鏂規硶鍒濆鍖栬繃婊ゅ櫒瀹炰緥錛?br />聽聽聽聽聽聽 public void init(FilterConfig config) throws ServletException
聽聽聽 2) doFilter()鏂規硶鍖呭惈榪囨護鍣ㄩ昏緫錛?br />聽聽聽聽聽聽 public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException
聽聽聽 3) destroy()鏂規硶鐢卞鍣ㄥ湪閿姣佽繃婊ゅ櫒瀹炰緥涔嬪墠璋冪敤錛?br />聽聽聽聽聽聽 public void destroy();
聽聽聽 4) FilterChain鐨刣oFilter()鏂規硶涔嬪悗鐨勪唬鐮佹瀯鎴愪簡鍚庢湡澶勭悊榪囨護鍣ㄨ皟鐢ㄣ?/p>
6.聽 閰嶇疆榪囨護鍣?br />絳旓細浣跨敤<filter>鍜?lt;filter-mapping>鍏冪礌鏉ラ厤緗細
聽聽聽 <filter>
聽聽聽聽聽聽 <filter-name>XSLTFilter</filter-name>聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //榪囨護鍣ㄥ悕
聽聽聽聽聽聽 <filter-class>filters.SmartXSLFilter</filter-class>聽聽聽聽 //鍏蜂綋榪囨護鍣ㄧ被
聽聽聽聽聽聽 <init-param>聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //鍒濆鍖栧弬鏁?br />聽聽聽聽聽聽聽聽聽 <param-name>xsltfile</param-name>
聽聽聽聽聽聽聽聽聽 <param-value>/xsl/stockquotes.xsl</param-value>
聽聽聽聽聽聽 </init-param>
聽聽聽 </filter>
聽聽聽 <filter-mapping>聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽 //灝嗚繃婊ゅ櫒搴旂敤浜嶹eb搴旂敤紼嬪簭涓殑姣忎釜Web璧勬簮
聽聽聽聽聽聽 <filter-name>Logger</filter-name>
聽聽聽聽聽聽 <url-pattern>/*</url-pattern>
聽聽聽 </filter-mapping>
2004-9-24聽聽聽聽聽 鏄熸湡浜斅犅犅犅犅?鏅?/p>
Web搴旂敤紼嬪簭鐢熷懡鍛ㄦ湡浜嬩歡鍙婄洃鍚櫒(Servlet V2.3鐗堟湰浠ュ悗鏂板鍔熻兘)
1. 浠涔堟槸浜嬩歡鐩戝惉鍣?
絳旓細1) 鏀寔ServletContext銆丠ttpSession(since v2.3)鍙奡ervletRequest(since v2.4)涓姸鎬佹敼鍙樼殑浜嬩歡閫氱煡;
聽聽聽 2) 瀹炵幇浜嗕竴涓垨澶氫釜servlet浜嬩歡鐩戝惉鍣ㄦ帴鍙ｇ殑綾誨瀷;
聽聽聽 3) 鎺у埗ServletContext銆丠ttpSession(since v2.3)鍙奡ervletRequest(since v2.4)涓殑鐢熷懡鍛ㄦ湡;
2. Servlet Context浜嬩歡鐩戝惉鍣?br />絳旓細1) 瀵逛簬搴旂敤紼嬪簭鑰岃█鍦↗VM灞傚埆綆＄悊璧勬簮鎴栦繚瀛樼姸鎬?br />聽聽聽 2) 鏈変簩縐嶇被鍨嬬殑浜嬩歡鐩戝惉鍣細
聽聽聽聽聽聽 a. ServletContextListener(浠ヤ笅鏄鐩戝惉鍣ㄧ殑鏂規硶)
聽聽聽聽聽聽聽聽聽 contextDestroyed(ServletContextEvent sce)
聽聽聽聽聽聽聽聽聽 contextInitialized(ServletContextEvent sce)
聽聽聽聽聽聽 b. ServletContextAttributeListener(浠ヤ笅鏄鐩戝惉鍣ㄧ殑鏂規硶)
聽聽聽聽聽聽聽聽聽 attributeAdded(ServletContextAttributeEvent scab)
聽聽聽聽聽聽聽聽聽 attributeRemoved(ServletContextAttributeEvent scab)
聽聽聽聽聽聽聽聽聽 attributeReplaced(ServletContextAttributeEvent scab)
3. HTTP Session浜嬩歡鐩戝惉鍣?br />絳旓細1) 綆＄悊浠庡悓涓涓鎴風鎴栫敤鎴峰悜涓涓猈eb搴旂敤紼嬪簭鍙戝嚭鐨勪竴緋誨垪璇鋒眰鐩稿叧鐨勭姸鎬佹垨璧勬簮;
聽聽聽 2) 鏈変簩縐嶇被鍨嬬殑浜嬩歡鐩戝惉鍣?
聽聽聽聽聽聽 a. HttpSessionListener(浠ヤ笅鏄鐩戝惉鍣ㄧ殑鏂規硶)
聽聽聽聽聽聽聽聽聽 sessionCreated(HttpSessionEvent se)
聽聽聽聽聽聽聽聽聽 sessionDestroyed(HttpSessionEvent se)
聽聽聽聽聽聽 b. HttpSessionAttributeListener(浠ヤ笅鏄鐩戝惉鍣ㄧ殑鏂規硶)
聽聽聽聽聽聽聽聽聽 attributeAdded(HttpSessionBindingEvent se)
聽聽聽聽聽聽聽聽聽 attributeRemoved(HttpSessionBindingEvent se)
聽聽聽聽聽聽聽聽聽 attributeReplaced(HttpSessionBindingEvent se)
4. Servlet Requst浜嬩歡鐩戝惉鍣?br />絳旓細1) 綆＄悊鏁翠釜request鐢熷懡鍛ㄦ湡鐨勭姸鎬?br />聽聽聽 2) 鏈変簩縐嶇被鍨嬬殑浜嬩歡鐩戝惉鍣?br />聽聽聽聽聽聽 a. ServletRequestListener(浠ヤ笅鏄鐩戝惉鍣ㄧ殑鏂規硶)
聽聽聽聽聽聽聽聽聽 requestDestroyed(ServletRequestEvent sre)
聽聽聽聽聽聽聽聽聽 requestInitialized(ServletRequestEvent sre)
聽聽聽聽聽聽 b. ServletRequestAttributeListener(浠ヤ笅鏄鐩戝惉鍣ㄧ殑鏂規硶)
聽聽聽聽聽聽聽聽聽 attributeAdded(ServletRequestAttributeEvent srae)
聽聽聽聽聽聽聽聽聽 attributeRemoved(ServletRequestAttributeEvent srae)
聽聽聽聽聽聽聽聽聽 attributeReplaced(ServletRequestAttributeEvent srae)
5. 鐩戝惉鍣ㄧ被鐨勮瀹?br />絳旓細1) 蹇呴』鍦ㄩ儴緗叉弿榪扮涓厤緗疄鐜扮被;
聽
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