xuesenlin http://www.jdon.com Oct 27, 2004 11:05 PM 
鍥炲
鏈榪戣繖涓鏃墮棿閮芥槸蹇欎簬瀛︿範 SpringFramework錛岄偅涓滀笢濂芥牱鐨勶紝鍙槸鍒氬垰瀛﹀畬Struts錛孒ibernate錛屾湁鏉ヤ簡榪欎釜錛屽懙鍛碉紝錛屾劅瑙夋尯绱殑銆?BR>鈥滀綘鎬庝箞鎶婅繖涓や釜涓嶇浉騫茬殑涓滆タ鎾ゅ埌涓璧鳳紵鈥?錛岀‘瀹炴槸榪欐牱錛?鏃犺浠庝粬浠殑璁捐錛?BR>瀹炵幇錛屼嬌鐢ㄧ瓑鏂歸潰浠栦滑鏄椹墰涓嶇浉鍙婏紝 浣嗘湰浜鴻涓轟粠鐞嗚В鐨勬柟闈㈢湅浠栦滑鏈夌偣綾諱技銆傚喌涓斿涔犺浠庡姣斾腑瀛﹀憖錛佽繖瀵瑰垵瀛﹁呬細鏈夊府鍔╀簬鐞嗚В銆?BR>閲嶈澹版槑錛氭湰浜洪兘鏄敤鑷繁鐨勮璦鍐欑殑錛屾湁涓撲笟鏈涓嶅榪樿澶у鎸囧嚭銆? - ) ZT鑷?
灝辮璁捐妯″紡 [b]Decorator[/b],涔熷氨鏄楗版ā寮忥紝榪欒繕涓嶅ソ鐞嗚В錛?鍦ㄥ師鏈夌殑涓滆タ涓婅繘琛岃楗頒竴涓嬩究鏄楗頒簡銆傛棦鐒舵槸瑁呴グ錛屼綘瑕佹湁涓諱綋鍛錛堣淇グ鐨勪笢瑗匡級錛岃繕瑕佹湁瑁呴グ鍝併備絾鏄笉綆′綘瑁呴グ鏉ヨ楗板幓錛屼粬鐨勬湰璐ㄦ槸涓嶅彉鐨勩?灝辮薄浜哄甫涓婁簡闈㈠叿錛屼絾浠栬繕鏄漢銆傚涓婃墦涓婁簡娌規紗錛屼絾瀹冭繕鏄鍛銆備綘涔熻瑙夊緱榪欐槸搴熻瘽銆?浣嗙悊瑙ｈ繖鐐瑰緢閲嶈(榪欐槸璺熺瓥鐣ユā寮廠trategy鐨勫尯鍒?錛屾湰浜鴻寰楄繖涓槸鐞嗚В濂?Decorator 妯″紡寰堥噸瑕佺殑涓鐐廣傚湪寮鍙戜腑浣犵粡甯歌澧炲己涓涓被鐨勫姛鑳斤紝鎴栬呮槸鎾ら攢涓涓被鐨勬煇浜涘姛鑳斤紝浣嗘槸涓涓被緇欎紬澶氱殑鍔熻兘榪涜瑁呴グ浜嗕互鍚庯紝涔熻鍘熸潵鐨勭被宸茬粡闈㈢洰鍏ㄩ潪浜嗭紝浣犲線寰浼氭劅鍒拌尗鐒訛紝鍏跺疄錛屼綘涓昏鎶撲綇浠栫殑涓諱綋錛岃剳瀛愰噷闈㈡椂鍒昏鐭ラ亾浣犵幇鍦ㄦ墍浣滅殑宸ヤ綔灝辨槸涓鴻繖涓富浣撹繘琛屾墦鎵殑宸ヤ綔銆?BR>鐮旂┒榪嘕ive鐨勯兘鐭ラ亾錛?閲岄潰鐨?Filter 灝辨槸鐢ㄤ簡Decorator 璁捐妯″紡錛岄偅涔堝湪榪欎釜璁捐閲岄潰錛屽畠鐨勪富浣撴槸浠涔堬紵 ForumMessage 錛屾棤鐤戞槸 ForumMessage 銆傝楗板搧褰撶劧鏄疐ilter 浜嗭紝鎵浠ユ垜浠湪浣滆繖浠朵簨鎯呯殑鏃跺欏緇堟槸浠orumMessage涓烘牳蹇冪殑錛孎ilter 榪涜瑁呴グ鐨勬椂鍊欙紝浣犲崈涓囦笉瑕佸繕璁頒綘鐜板湪鏄負ForumMessage鑰屽伐浣滐紒鏈夊叧浜巎ive鐮旂┒鐨勬枃绔狅紝緗戜笂涓澶у爢錛岀幇鍦ㄧ湅鐪嬩竴涓瘮杈冪畝鍗曠殑 Decorator:
//姣斿鏈変竴涓娊璞℃瀯浠訛細
public interface Component {
void operation();
}
//涓涓叿浣撴瀯浠訛細
public class ConcreteComponent implements Component {
public void operation() {
//Write your code here
}
}
//涓涓娊璞¤楗幫細
public class Decorator implements Component {
private Component component; //寮曠敤
鈥?鈥? 鈥? 鈥?BR>//鍟嗕笟鏂規硶錛屽媧劇粰鏋勪歡
public void operation() {
component.operation();
}
}
//涓涓叿浣撹楗幫細
public class ConcreteDecorator extends Decorator {
/**
* 鍟嗕笟鏂規硶
*/
public void operation(){
//涓浜涘叿浣撶殑瑁呴グ鐨勪唬鐮?/FONT>
......
super.operation(); // 涓諱綋
//涓浜涘叿浣撶殑瑁呴グ鐨勪唬鐮?/FONT>
.......
}
}
......
鎴戜滑涓昏鐪嬬湅錛屽湪ConcreteDecorator 涓殑operation() 鏂規硶錛屼粬鐨勭埗綾繪槸濮旀墭鍒癱omponent緇勫緩鏉ュ畬鎴愮殑錛屽叾瀹炲畠灝辨槸涓諱綋錛?涓浜涜楗頒唬鐮侀兘浼氬湪榪欎釜鏂規硶錛堜富浣擄級鎵ц鍓嶈繘琛屸滈澶勭悊鈥濇垨鏄墽琛屽悗榪涜鈥滄敹灝鋸濄?BR>鍙笉鏄紝浠庝笂闈㈠緢瀹規槗灝辯湅鍑轟簡錛屾娊璞¤楗頒腑鐨刼peration() 鏂規硶娌℃湁鍦ㄥ叿浣撶殑瑁呴グ綾諱腑榪涜鈥滃叏鐩樷濊鐩栵紝鍥犱負浠栫敤浜唖uper.operation(); 榪欐牱鐨勮鍙ャ傚彲瑙佽楗版ā寮忎腑涓嶇鎬庝箞鏍鳳紝 浣犻兘瑕佹壘鍒扮被浼艱繖涓殑鏂規硶銆傝鏄庝粬鐨勪富浣撹繕鍦ㄣ?榪欐槸璺熺瓥鐣ユā寮廠trategy鐨勫尯鍒?
璇翠簡鎬庝箞澶氾紝涓嶇煡閬撳ぇ瀹舵湁娌℃湁鎰熻鍒癈oncreteDecorator綾諱腑鐨刼peration()鏂規硶璺烻pring AOP 涓殑 InvocationHandler 鎺ュ彛鐨刬nvoke()鏂規硶鏈夌偣鐩哥被鏄憿錛?BR>鎴戜滑鏉ョ湅鐪嬭瀹炵幇 InvocationHandler 鏃跺欒閲嶅啓鐨刬nvoke()鏂規硶錛?BR>
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
鈥︹︹︹︹︹︹︹?
result = method.invoke(originalObject, args);
鈥︹︹︹︹︹︹︹︹︹︹?.
return result;
}
InvocationHandler.invoke 鏂規硶灝嗗湪琚唬鐞嗙被鐨勬柟娉曡璋冪敤涔嬪墠瑙﹀彂銆傞氳繃榪欎釜鏂規硶涓紝鎴戜滑鍙互鍦ㄨ浠ｇ悊綾繪柟娉曡皟鐢ㄧ殑鍓嶅悗榪涜涓浜涘鐞嗭紝濡備笂闈唬鐮佷腑鎵紺猴紝InvocationHandler.invoke鏂規硶鐨勫弬鏁頒腑浼犻掍簡褰撳墠琚皟鐢ㄧ殑鏂規硶錛圡ethod錛夛紝浠ュ強琚皟鐢ㄦ柟娉曠殑鍙傛暟銆傚悓鏃訛紝鎴戜滑鍙互閫氳繃Method.invoke鏂規硶璋冪敤琚唬鐞嗙被鐨勫師濮嬫柟娉曞疄鐜般傝繖鏍鳳紝鎴戜滑灝卞彲浠ュ湪琚唬鐞嗙被鐨勬柟娉曡皟鐢ㄥ墠鍚庡ぇ鍋氭枃绔犮傦紙璇存槑錛氬紩鐢ㄤ簡Spring 寮鍙戞寚鍗椾腑鐨勪竴孌碉級
鍦ㄥ洖鍒拌楗版ā寮忥紝鍏舵柟娉昽peration() 鍦ㄦ墽琛屽墠鍜屾墽琛屽悗錛屼篃鍙互瀵瑰畠澶у仛鏂囩珷銆傚姝ょ湅鏉ワ紝 Spring AOP 鍜?Decorator錛屼粠鐞嗚В灞傞潰涓婃潵鐪嬶紝紜疄鏈夌偣鐩歌薄錛屾敞鎰忥細鍙槸鐞嗚В灞傞潰錛?鑰屼粬浠殑瀹炵幇瀹屽叏涓ら┈浜嬶紒
鍏跺疄涓昏鏄ぇ瀹舵庝箞鐪嬪緟榪欎釜闂錛屾寜鐓ф湰浜虹殑鐞嗚В錛孲pring AOP 涔熷彲浠ヨ鏄竴縐嶅箍涔夌殑瑁呴グ錛屼絾瀹冨張涓嶆槸瑁呴グ妯″紡銆傚畠鍚屾牱涔熸槸瀵規煇涓柟娉曞姞涓婁簡闄愬埗錛屾瘮濡俰nsert() 鐨勬椂鍊欙紝浣犺瀵瑰畠鍋氭墽琛屽墠寮鍚簨鍔″拰鎵ц鍚庢彁浜ゆ垨鍥炴粴榪欐牱鐨勨滆楗扳濄?鍙堟瘮濡備綘涔熷彲浠ュ鏌愪釜浜烘搷浣滆祫婧愬悗鍋歭og榪欐牱鐨勮楗板伐浣溿傜瓑絳夛紝錛?BR>浠栦滑鐨勭浉鍚屼箣澶勫氨榪欎箞鐐廣?BR>AOP 涔熶笉鏄粈涔堟柊鐨勪笢瑗匡紝褰撶劧濡傛灉浣犵殑AOP鏄鍣?Jboss 4.0)瀹炵幇鐨勮瘽錛?閭ｄ箞鎸夌収涓婇潰璇寸殑錛屼綘鐨勪竴浜涙柟娉曞氨浼氳瀹瑰櫒鎵鈥滆楗扳濄?
濡傛鐪嬫潵錛屾洿澶氱殑鏃跺欏彲浠ョ悊瑙ｄ負 Spring AOP 鍜屼竴浜汚OP 瀹瑰櫒鏄湪緋葷粺綰х殑錛屽鍣ㄧ駭鐨勨滆楗扳濄?鑰岃楗版ā寮忓垯鏄笟鍔＄駭鐨勮楗般?榪欑偣鍏跺疄浠庡鎴風涔熷緢瀹規槗鐞嗚В銆?BR>濡傛灉鏄疉OP 錛岀▼搴忓憳鍙互鏀懼績鐨勫啓浣犵殑浠ｇ爜錛堝嵆浣挎湁鐐圭涔熶笉鎬曪紝鏈堿OP鎶ょ潃鍛級銆?鍥犱負緋葷粺灝嗗湪緋葷粺榪愯鏃跺欏榪欐浠ｇ爜榪涜鈥滆楗扳濄備篃灝辨槸璇達紝榪欎簺瑁呴グ涓嶄細鍑虹幇鍦ㄥ鎴風鐨勪唬鐮佷腑錛岋紝錛岃岋紝Decorator妯″紡鍛紵鍛靛懙錛岃繖涓椂鍊欑▼搴忓憳瑕佹湁鐐瑰ご鑴戜簡錛屼粬浠鑷繁緇勮涓浜涜楗扮被錛屾寜鐓ф煇涓縐嶆満鍒跺涓諱綋榪涜瑁呴グ銆備篃灝辨槸璇達紝榪欎簺淇グ綾昏鍑虹幇鍦ㄥ鎴風鐨勪唬鐮佷腑銆傜湅浠ｇ爜灝辯煡閬撲簡 :--)
InputStreamReader input = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(input)錛?BR>....//涓諱綋鏄疭ystem.in
鍝?錛?澶熺粡鍏哥殑渚嬪瓙錛?
http://www.jdon.com/jive/article.jsp?forum=91&thread=17341
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