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鎴戝湪鏈€榪戠殑涓€涓?/span> web 欏圭洰涓負浜嗗疄鐜?/span> bookmark 鍔熻兘紕板埌浜?/span> javascript 璺ㄥ煙璁塊棶鐨勯棶棰樸€傝搗鍒濓紝鍦?/span> google 涓婃悳鐨勫緢澶氳В鍐蟲柟妗堝茍涓嶉€傜敤浜庢垜鐨勬儏褰紝鍙湪鏈変竴綃囨枃绔犱腑鎻愬埌鐨勮繙紼嬪姞杞?/span> javascript 鏂規硶浠庣悊璁轟笂鐪嬪埌浜嗚В鍐崇殑甯屾湜銆備絾鍙儨浣滆€呭彧鏄竴絎斿甫榪囷紝騫舵湭鐢ㄤ緥瀛愯緇嗚鏄庯紝鎵€浠ヤ笉寰椾笉鎽哥儲浜嗕竴闃墊墠鎶婅繖涓棶棰樻悶瀹氥€傚湪姝わ紝甯屾湜閫氳繃鏈枃涓哄悓鏍瘋榪欎釜闂鍥版壈鐨勬湅鍙嬩滑鎻愪緵涓€涓В鍐蟲柟娉曚綔涓哄弬鑰冦€傚鏈夐敊璇紝嬈㈣繋鎸囨錛?/span>

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Bookmark 鏄洰鍓嶈澶?/span> web2.0 緗戠珯 (http://del.icio.us/, www.diigo.com 絳夛級閮芥彁渚涚殑鐑棬 feature 銆傚畠鑳藉皢浜掕仈緗戜笂鑷繁鍠滄鐨勭綉欏墊敹钘忓埌 Bookmark 鏈嶅姟鍣ㄤ笂銆傛湰鏂囪瑙ｅ喅鐨勯棶棰樺氨鍙戠敓鍦ㄧ敤鎴鋒彁浜ょ綉欏?/span> URL 錛堣繕鍖呮嫭 Tag, Notes 絳夛級緇?/span> Bookmark 鏈嶅姟鍣ㄦ椂銆?/span>

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鍏充簬 URL 鐨勬彁浜よ嚦灝戝彲浠ユ湁涓夌鏂瑰紡錛?/span>

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1.聽聽聽聽聽聽 鐧婚檰 Bookmark 鏈嶅姟鍣ㄧ殑鎻愪氦欏甸潰錛屽皢瑕佹敹钘忕殑 URL 閫氳繃璇ラ〉闈㈡彁浜ょ粰鏈嶅姟鍣ㄣ€?/span>

2.聽聽聽聽聽聽 瀹夎嫻忚鍣ㄦ彃浠訛紝閫氳繃鎻掍歡灝?/span> URL 鎻愪氦緇欐湇鍔″櫒銆?/span>

3.聽聽聽聽聽聽 浠?/span> Bookmark 鏈嶅姟鍣ㄥ姩鎬佸姞杞?/span> javascript 灝忓伐鍏峰埌褰撳墠欏甸潰錛岄€氳繃瀹冩潵瀹屾垚鎻愪氦宸ヤ綔銆傦紙鍙傝€?/span> diigo 鐨勪緥瀛愶紝鏀惰棌涓€涓綉欏甸摼鎺ュ埌嫻忚鍣ㄦ敹钘忓す錛岄摼鎺ョ殑 URL 鏄竴孌?/span> javascript 浠ｇ爜錛屽畠浼氫粠鏈嶅姟鍣ㄥ姞杞戒竴孌?/span> javascript 娉ㄥ叆褰撳墠緗戦〉錛?/span>

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絎竴縐嶆柟寮忓紑鍙戣搗鏉ユ渶綆€鍗曪紝浣嗗鐢ㄦ埛鏉ヨ姣旇緝楹葷儲錛屾瘡嬈￠兘闇€瑕佸厛鐧婚檰 Bookmark 鏈嶅姟鍣ㄦ墠鑳藉畬鎴愭彁浜わ紱絎簩縐嶆柟寮忔垜騫朵笉鐔熸倝鎻掍歡寮€鍙戯紝鑰屼笖鐢ㄦ埛涔熶笉鍠滄澶鐨勬彃浠跺爢婊¤嚜宸辯殑嫻忚鍣紱絎笁縐嶆柟寮忓紑鍙戦毦搴﹀皬錛屽張閬垮厤浜嗘瘡嬈＄櫥闄嗘湇鍔″櫒鐨勯夯鐑︼紝鎵€浠ユ垜鏈€緇堥噰鐢ㄤ簡瀹冦€?/span>

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涓婇潰璁茬殑絎笁縐嶆柟寮忎腑鍔ㄦ€佸姞杞界殑 javascript 灝忓伐鍏烽櫎浜嗛渶瑕佺敓鎴?/span> UI 渚涚敤鎴峰～鍐欎俊鎭紙 URL 錛?/span> tag 錛?/span> notes 絳夛級錛屽綋鐢ㄦ埛鐐瑰嚮鎻愪氦鐨勬椂鍊欙紝榪樿瀹屾垚涓庢湇鍔″櫒閫氫俊鐨勫姛鑳姐€傚湪娌℃湁璺ㄥ煙璁塊棶緇忛獙鐨勬儏鍐典笅錛屾渶鍏堟兂鍒扮殑褰撶劧鏄?/span> ajax 錛佷絾寰堝揩灝變細鍙戠幇鏍規湰琛屼笉閫氥€?/span>

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璺ㄥ煙璁塊棶錛岀畝鍗曟潵璇村氨鏄?/span> A 緗戠珯鐨?/span> javascript 浠ｇ爜璇曞浘璁塊棶 B 緗戠珯錛屽寘鎷彁浜ゅ唴瀹瑰拰鑾峰彇鍐呭銆傜敱浜庡畨鍏ㄥ師鍥狅紝璺ㄥ煙璁塊棶鏄鍚勫ぇ嫻忚鍣ㄦ墍榛樿紱佹鐨勩€傚啓榪囪法鍩熻闂?/span> ajax 鐨勬湅鍙嬬浉淇￠兘閬囧埌榪囪鍛婄煡鈥滄病鏈夋潈闄愨€濈殑鎯呭喌銆傞€氳繃 XMLHttp 鏉ュ彂閫佹暟鎹粰 Bookmark 鏈嶅姟鍣ㄧ殑灝濊瘯澶辮觸浜嗐€備簬鏄紝鐪嬪埌緗戜笂鐨勪竴浜涜祫鏂欙紝鎴戝張寮€濮嬪皾璇曠敤 javascript 灝忓伐鍏峰湪鐢ㄦ埛緗戦〉鍔ㄦ€佸垱寤轟竴涓殣钘忕殑 iframe, iframe 鐨?/span> src 鎸囧悜鏈嶅姟鍣ㄧ殑涓€涓?/span> servlet 錛岃瘯鍥鵑€氳繃璋冪敤 iframe 涓彁渚涚殑 javascript 鏉ュ畬鎴愪笌鏈嶅姟鍣ㄧ殑閫氫俊銆備絾涓嶅垢鐨勬槸錛岀敤鎴風綉欏典腑鐨?/span> javascript 浠ｇ爜璁塊棶 iframe 涔熻嫻忚鍣ㄥ綊涓鴻法鍩熻闂紙鐗規寚 iframe 鐨?/span> src 鎸囧悜鍏跺畠緗戠珯鐨勬儏褰級錛屽皾璇曞啀嬈″け璐ャ€?/span>

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鏈€緇堬紝鍦ㄤ竴綃囨枃绔犱腑鐪嬪埌錛屼笌 iframe 涓嶅悓錛屽鏋?/span> A 緗戠珯浠?/span> B 緗戠珯鍔犺澆 javascript 錛?/span> A 緗戠珯鍙互鑷敱鐨勮闂 javascript 鐨勫唴瀹癸紝騫朵笉浼氳嫻忚鍣ㄨ涓烘槸璺ㄥ煙璁塊棶銆傛ā浠垮垰鎵?/span> iframe 鐨勬€濊礬錛屽綋鐢ㄦ埛鐐瑰嚮鎻愪氦鏃訛紝鍙互鍔ㄦ€佸垱寤轟竴涓?/span> javascript 瀵硅薄錛岃瀵硅薄鐨?/span> src 鎸囧悜 Bookmark 鏈嶅姟鍣ㄧ殑涓€涓?/span> servlet 錛屾敞鎰忥細 URL 銆?/span> Tag 銆?/span> Notes 銆?/span> User 銆?/span> Password 絳変俊鎭浣滀負 src URL 鍙傛暟浼犵粰鏈嶅姟鍣ㄣ€傝鐪嬩笅闈㈢殑浠ｇ爜錛?/span>

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var url = "http://localhost:8080/Deeryard/BookmarkServlet?" +

聽聽聽聽聽聽聽聽聽聽 "url=" + url_source + "&" + "title=" + title + "&" +

"tag=" + tag + "&" + "notes=" + notes + "&" + "user=" + user + "&" + "password=" + password;

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url = encodeURI(url);

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//Submit to server with a trick

var js_obj = document.createElement( "script" );

js_obj.type = "text/javascript" ;

js_obj.setAttribute( "src" , url);

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//Get response from server by appending it to document

document.body.appendChild(js_obj);

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涓婇潰渚嬪瓙涓紝 js_obj.setArrribute() 灝嗕俊鎭綔涓?/span> src 鐨?/span> URL 鍙傛暟鎻愪氦緇欎簡 Bookmark servlet 銆傞偅涔堢敤鎴峰張濡備綍鍙栧緱鏈嶅姟鍣ㄧ殑鍝嶅簲淇℃伅鍛紵絳旀灝辨槸鏈€鏈竴琛屼唬鐮侊紝 servlet 鐨勮緭鍑哄繀欏繪槸 javascript 浠ｇ爜錛屽畠鍙互璋冪敤鐢ㄦ埛緗戦〉涓婄殑鍏朵粬 javascript 鍑芥暟錛屼互鍙婃搷浣?/span> dom 瀵硅薄銆備笅闈㈢殑 servlet 浠ｇ爜鐢熸垚浜嗕竴涓?/span> javascript 鍑芥暟璋冪敤錛?/span>

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out.write("onServerResponse(INADEQUATE_INFORMATION);");

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document.body.appendChild(js_obj) 鎵ц鍚?/span> onServerResponse( INADEQUATE_INFORMATION) 灝變細寰楀埌鎵ц錛屼嬌瀹㈡埛緗戦〉鍝嶅簲鏈嶅姟鍣ㄧ粨鏋溿€傝繖鏍蜂竴涓畬鏁寸殑閫氫俊榪囩▼灝卞畬鎴愪簡銆?/span>

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鏉ユ€葷粨涓€涓嬭繖涓渚嬶紝棣栧厛涓庡緢澶氳法鍩熻闂殑鎯呭艦涓嶅悓錛屾湰鏂囨彁鍒扮殑璺ㄥ煙璁塊棶闇€瑕佸鏈嶅姟鍣ㄧ榪涜鎺у埗錛屽嵆璁╂湇鍔″櫒绔?/span> Servlet 鏉ラ€傚簲瀹㈡埛绔綉欏?/span> javascript 鐨勯渶姹傦紱鑰屽叾浠栦竴浜涘父瑙佺殑渚嬪瓙鍒欏鏈嶅姟鍣ㄧ娌℃湁鎺у埗鑳藉姏錛屾瘮濡備粠鍏朵粬緗戠珯鎶撳唴瀹圭殑灝忓伔紼嬪簭銆傚彟澶栵紝闇€瑕佹敞鎰忕殑鏄繖縐嶆柟娉曚腑瀹為檯鐢ㄥ埌浜?/span> get 鏂規硶鏉ユ彁浜や俊鎭紝浠庝竴浜涜祫鏂欎笂鐪嬪埌錛?/span> get 鏂規硶姣忔鎻愪氦鐨勪俊鎭笉鑳借秴榪?/span> 2k 銆?/span>

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2006-8-27

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Perl 浣滀負涓€縐嶈剼鏈璦€鍙互瀹炴椂鍦扮敓鎴愬拰鎵ц浠ｇ爜銆傝繖縐嶇壒鎬у彲浠ユ妸浠ｇ爜鐨勭紪璇戞帹榪熷埌榪愯鏃訛紝鎵€浠ュ張縐頒負鈥滃姩鎬佷唬鐮佲€濄€傚彟澶栵紝 Perl 涔熷 Java 銆?/span> C++ 涓€鏍鋒彁渚涗簡寮傚父澶勭悊鏈哄埗銆傛湰鏂囧皢鍒濇鎺㈣ Perl 涓疄鐜板姩鎬佷唬鐮佸拰寮傚父澶勭悊鏈哄埗鐨勫嚱鏁幫細 eval 銆傚鏈夐敊璇笉瓚籌紝嬈㈣繋璁ㄨ鍜屾壒璇勬寚姝ｃ€?/span>

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eval 鍑芥暟鍙互鐪嬩綔鏄?/span> Perl 铏氭嫙鏈猴紝瀹冪殑鍙傛暟灝辨槸涓€孌?/span> Perl 浠ｇ爜銆傚埄鐢?/span> 鈥檖erldoc 鈥揻 eval鈥?/font> 鍙互鑾峰彇 eval 鍑芥暟浣跨敤甯姪錛屽叾涓粙緇嶄簡瀹冪殑涓ょ浣跨敤鏂瑰紡錛?/span>

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l聽聽聽聽聽聽聽聽 eval EXPR

EXPR 鏄竴涓殑琛ㄨ揪寮忥紝渚嬪錛?/span>

eval "print $a" ;

eval 'print $a' . ', $b' ;

eval 1 + 3 ;

eval 'print ' . '$a + $b, "\n"' ;

eval $command;#$command = 鈥榩rint 鈥渉ello Perl鈥濃€?/span>

eval $ARGV[0];

鍦ㄦ墽琛屾椂錛?/span> Perl 瑙ｉ噴鍣ㄤ細棣栧厛瑙ｆ瀽琛ㄨ揪寮忕殑鍊鹼紝鐒跺悗灝嗚〃杈懼紡鍊間綔涓轟竴鏉?/span> Perl 璇彞鎻掑叆褰撳墠鎵ц涓婁笅鏂囥€傛墍浠ワ紝鏂扮敓鎴愮殑璇彞涓?/span> eval 璇彞鏈韓鍏鋒湁鐩稿悓鐨勪笂涓嬫枃鐜銆傝繖縐嶆柟寮忎腑錛屾瘡嬈℃墽琛?/span> eval 璇彞錛岃〃杈懼紡閮戒細琚В鏋愩€傛墍浠ワ紝濡傛灉 eval EXPR 濡傛灉鍑虹幇鍦ㄥ驚鐜腑錛岃〃杈懼紡鍙兘浼氳瑙ｆ瀽澶氭銆?/span> eval 鐨勮繖縐嶆柟寮忎嬌寰?/span> Perl 鑴氭湰紼嬪簭鑳藉疄鏃剁敓鎴愬拰鎵ц浠ｇ爜錛屼粠鑰屽疄鐜頒簡鈥滃姩鎬佷唬鐮佲€濄€?/span>

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l聽聽聽聽聽聽聽聽 eval BLOCK

BLOCK 鏄竴涓唬鐮佸潡錛屼緥濡傦細

eval {print $a};

eval {$a = 1, $b = 2, $c = $a + $b};

涓庣涓€縐嶆柟寮忎笉鍚岋紝 BLOCK 鍙細琚В鏋愪竴嬈★紝鐒跺悗鏁翠釜鎻掑叆褰撳墠 eval 鍑芥暟鎵€鍦ㄧ殑鎵ц涓婁笅鏂囥€傜敱浜庤В鏋愪笂鐨勬€ц兘鐨勪紭鍔匡紝浠ュ強鍙互鍦ㄧ紪璇戞椂榪涜浠ｇ爜璇硶媯€鏌ワ紝榪欑鏂瑰紡閫氬父琚綔涓?/span> Perl 鐢ㄦ潵涓轟竴孌典唬鐮佹彁渚涘紓甯告崟鎹夋満鍒訛紝铏界劧鍓嶄竴縐嶆柟寮忎篃鍙互銆?/span>

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鎸夊府鍔╃殑鍚嶇О錛岀О eval 鐨勫弬鏁扮▼搴忎負鈥滃皬紼嬪簭鈥?/span> (mini-program) 銆傚湪涓ょ鏂瑰紡涓紝 eval 鍑芥暟鐨勮繑鍥炲€奸兘鏄皬紼嬪簭鐨勬渶鍚庝竴鏉¤鍙ョ殑鍊鹼紝濡傛灉閬囧埌 return 璇彞錛屼笌瀛愪緥紼嬬浉鍚屻€?/span>

Script1: #!/usr/bin/perl -w 聽 push ( @program,'$i = 1;'); push ( @program,'$i = 3; $j = 2; $k = $i + $j'); push ( @program, '$i = 3; return 24; $k = $i + $j'); 聽 foreach $exp (@program) { 聽聽聽 $rtn =eval($exp); 聽聽聽 print $rtn,"\n"; } Output: 1 5 24

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濡傛灉灝忕▼搴忎腑鏈夎娉曢敊璇€佽繍琛屾椂閿欒閬囧埌 die 璇彞錛?/span> eval 灝嗚繑鍥?/span> undef 銆傞敊璇爜琚繚瀛樺湪 $@ 涓€?/span>

Script2: #!/usr/bin/perl -w 聽 push ( @program, '$i = 3; die "error message"; $k = $i + $j'); 聽 foreach $exp (@program) { 聽聽聽 $rtn =eval($exp); 聽聽聽 if ( ! defined ( $rtn)) 聽聽聽 { 聽聽聽聽聽聽 print "Exception: " , $@,"\n"; 聽聽聽 } 聽聽聽 else 聽聽聽 { 聽聽聽聽聽聽 print $rtn,"\n"; 聽聽聽 } } ; 聽 Output: Exception: error message at (eval 1) line 1. 聽

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Script3: #!/usr/bin/perl -w 聽 # a run-time error eval '$answer =' ;聽聽 # sets $@ warn $@ if$@; 聽 Output: syntax error at (eval 1) line 2, at EOF

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weidagang2046 2006-08-27 15:47 鍙戣〃璇勮

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