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&nbsp; 銆婅璁℃ā寮忋�嬩腑瀵筍ingleton妯″紡鐨勫畾涔変負錛氫繚璇佷竴涓被浠呮湁涓�涓疄渚嬶紝騫舵彁渚涗竴涓彲浠ヨ闂畠鐨勫叏灞�璁塊棶鐐廣�?br /><br />&nbsp; &nbsp; Singleton妯″紡鐨勫伐浣滃師鐞嗗涓嬶細<br /><ol><li>鐢ㄤ竴涓柟娉曟潵瀹炰緥鍖栨墍闇�瀵硅薄銆備負浜嗕繚璇佽鏂規硶鏄敮涓�鑳藉疄渚嬪寲姝ょ被鍨嬪璞＄殑鏂規硶錛屾垜浠皢榪欎釜綾葷殑鏋勯�犲嚱鏁板畾涔変負淇濇姢鐨勬垨鑰呯鏈夌殑銆?/li><li>璋冪敤榪欎釜鏂規硶鏃訛紝鍏堣媯�鏌ュ璞℃槸鍚﹀凡緇忓疄渚嬪寲浜嗐�傚鏋滃凡琚疄渚嬪寲錛岄偅涔堣鏂規硶浠呰繑鍥炲璇ュ璞＄殑寮曠敤錛涘鏋滃皻鏈疄渚嬪寲錛岃鏂規硶灝嗗疄渚嬪寲瀵硅薄騫惰繑鍥炲姝ゆ柊瀹炰緥鐨勪竴涓紩鐢ㄣ�?/li></ol>&nbsp; &nbsp;鏍規嵁涓婅堪鍘熺悊錛屾垜浠彲浠ュ緱鍒癝ingleton妯″紡鐨勬湰璐ㄥ湪浜庢墍鏈変嬌鐢ㄦ墍闇�瀵硅薄鐨勫叾浠栧璞￠兘浣跨敤鍚屼竴涓疄渚嬨�係ingleton妯″紡鐨勬剰鍥句嬌鎴戜滑鍙鎵�闇�瀵硅薄瀹炰緥鍖栦竴嬈★紝鏃犻渶鐢ㄦ埛鍐嶅叧蹇冩墍闇�瀵硅薄鏄惁瀛樺湪錛屽嵆璁╂墍闇�瀵硅薄鑷繁璐熻矗鍙疄渚嬪寲涓�嬈°�?br />&nbsp; &nbsp;鍗曚緥妯″紡涓�鑸唬鐮佸涓嬶細<br /><br /><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">&nbsp;1</span>&nbsp;<span style="color: #0000FF; ">public</span>&nbsp;<span style="color: #0000FF; ">class</span>&nbsp;Singleton&nbsp;{<br /><span style="color: #008080; ">&nbsp;2</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">static</span>&nbsp;<span style="color: #0000FF; ">private</span>&nbsp;Singleton&nbsp;instance&nbsp;=&nbsp;<span style="color: #0000FF; ">new</span>&nbsp;Singleton();<br /><span style="color: #008080; ">&nbsp;3</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br /><span style="color: #008080; ">&nbsp;4</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">private</span>&nbsp;Singleton(){}<br /><span style="color: #008080; ">&nbsp;5</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br /><span style="color: #008080; ">&nbsp;6</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">public</span>&nbsp;<span style="color: #0000FF; ">static</span>&nbsp;Singleton&nbsp;getInstance(){<br /><span style="color: #008080; ">&nbsp;7</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">return</span>&nbsp;instance;<br /><span style="color: #008080; ">&nbsp;8</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br /><span style="color: #008080; ">&nbsp;9</span>&nbsp;}<font color="#008080"><br /></font></div>&nbsp; &nbsp; 褰揅lassLoader鍔犺澆綾誨悗Singleton鐨勫疄渚嬩細鍦ㄧ涓�鏃墮棿鍐呭垱寤猴紝鍥犳瀵逛簬寮�閿�姣旇緝澶х殑鍗曚綋鏇撮�氬父鐨勫仛娉曟槸灝嗗疄渚嬪寲鎺ㄨ繜鍒頒嬌鐢ㄥ畠鐨勬椂鍊欙紝鍗蟲儼鎬у姞杞斤紝浠ｇ爜濡備笅錛?br /><div style="background-color:#eeeeee;font-size:13px;border:1px solid #CCCCCC;padding-right: 5px;padding-bottom: 4px;padding-left: 4px;padding-top: 4px;width: 98%;word-break:break-all"><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">&nbsp;1</span>&nbsp;<span style="color: #0000FF; ">public</span>&nbsp;<span style="color: #0000FF; ">class</span>&nbsp;Singleton&nbsp;{<br /><span style="color: #008080; ">&nbsp;2</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">static</span>&nbsp;<span style="color: #0000FF; ">private</span>&nbsp;Singleton&nbsp;instance&nbsp;=&nbsp;<span style="color: #0000FF; ">null</span>;<br /><span style="color: #008080; ">&nbsp;3</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br /><span style="color: #008080; ">&nbsp;4</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">private</span>&nbsp;Singleton(){}<br /><span style="color: #008080; ">&nbsp;5</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br /><span style="color: #008080; ">&nbsp;6</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">public</span>&nbsp;<span style="color: #0000FF; ">static</span>&nbsp;Singleton&nbsp;getInstance(){<br /><span style="color: #008080; ">&nbsp;7</span>&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span style="color: #0000FF; ">if</span>(instance&nbsp;==&nbsp;<span style="color: #0000FF; ">null</span>)&nbsp;instance&nbsp;=<span style="color: #0000FF; ">new</span>&nbsp;Singleton();<br /><span style="color: #008080; ">&nbsp;8</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">return</span>&nbsp;instance;<br /><span style="color: #008080; ">&nbsp;9</span>&nbsp;&nbsp; &nbsp; }<br /><span style="color: #008080; ">10</span>&nbsp;}</div><br />&nbsp; &nbsp; 榪欐槸鍦ㄥ崟綰跨▼涓殑鎯呭喌錛屽鏋滄垜浠殑浠ｇ爜瑕佸湪澶氱嚎紼嬩腑榪愯鍛紵<br />&nbsp; &nbsp; 鍜嬬湅璧鋒潵錛屽彧闇�鍚屾鍖栧Singleton瀵硅薄鏄惁宸插垱寤鴻繘琛屾鏌ユ搷浣滃嵆鍙�備絾鎬ц兘涓婃潵璇翠笉涓嶅垝綆楋紝鍥犱負鎵�鏈夌嚎紼嬮兘蹇呴』絳夊緟鍏充簬瀵硅薄鏄惁瀛樺湪鐨勬鏌ャ�傚洜姝ゅ彲鑳芥兂鍒扮殑鏄涓嬭В鍐蟲柟娉曪細<br /><div style="font-size: 13px; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: #cccccc; border-right-color: #cccccc; border-bottom-color: #cccccc; border-left-color: #cccccc; border-image: initial; padding-right: 5px; padding-bottom: 4px; padding-left: 4px; padding-top: 4px; width: 98%; word-break: break-all; background-color: #eeeeee; "><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">1</span>&nbsp;<span style="color: #0000FF; ">if</span>(instance&nbsp;==&nbsp;<span style="color: #0000FF; ">null</span>)&nbsp;{<br /><span style="color: #008080; ">2</span>&nbsp;&nbsp; &nbsp; <span style="color: #0000FF; ">synchronized</span>(Singleton.<span style="color: #0000FF; ">class</span>){<br /><span style="color: #008080; ">3</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;instance&nbsp;=&nbsp;<span style="color: #0000FF; ">new</span>&nbsp;Singleton();<br /><span style="color: #008080; ">4</span>&nbsp;&nbsp; &nbsp; &nbsp;}<br /><span style="color: #008080; ">5</span>&nbsp;}</div>&nbsp; &nbsp; &nbsp;浣嗕粛鏈夊彲鑳戒袱涓皟鐢ㄩ兘婊¤凍null鐨勬鏌ユ潯浠訛紝鐒跺悗鍐嶅皾璇曞悓姝ュ寲錛屾渶鍚庤繕鏄彲鑳戒細鍒涘緩涓や釜Singleton瀵硅薄銆傝В鍐沖姙娉曟槸鍦ㄥ悓姝ユ鏌ュ悗錛屽啀嬈℃鏌ュ疄渚嬫槸鍚﹀凡鍒涘緩銆?br /><div style="font-size: 13px; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: #cccccc; border-right-color: #cccccc; border-bottom-color: #cccccc; border-left-color: #cccccc; border-image: initial; padding-right: 5px; padding-bottom: 4px; padding-left: 4px; padding-top: 4px; width: 98%; word-break: break-all; background-color: #eeeeee; "><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">1</span>&nbsp;<span style="color: #0000FF; ">if</span>(instance&nbsp;==&nbsp;<span style="color: #0000FF; ">null</span>)&nbsp;{<br /><span style="color: #008080; ">2</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">synchronized</span>(Singleton.<span style="color: #0000FF; ">class</span>){<br /><span style="color: #008080; ">3</span>&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<span style="color: #0000FF; ">if</span>(instance&nbsp;==&nbsp;<span style="color: #0000FF; ">null</span>)&nbsp;instance&nbsp;=&nbsp;<span style="color: #0000FF; ">new</span>&nbsp;Singleton();<br /><span style="color: #008080; ">4</span>&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;}<br /><span style="color: #008080; ">5</span>&nbsp;}</div>&nbsp; &nbsp; &nbsp;榪欑鏂規硶琚О涓篋CL(Double-Checked Locking妯″紡)銆備絾鏄垜浠緢蹇彂鐜幫紝榪欑鏂規硶鍦–++涓�傜敤錛屼絾瀵笿ava涓嶉�傜敤錛屽師鍥犲湪浜嶫ava緙栬瘧鍣ㄦ湰韜殑浼樺寲宸ヤ綔浼氬湪鏋勯�犳柟娉曞疄渚嬪寲瀵硅薄涔嬪墠浠庢瀯閫犳柟娉曡繑鍥炴寚鍚戣瀵硅薄鐨勫紩鐢ㄣ�傚嵃鍦ㄥ湪Singleton瀵硅薄鐪熸瀹屽叏鏋勯�犱箣鍓嶏紝dosyn灝卞彲鑳藉畬鎴愪簡銆傞偅鎬庝箞鍔炲憿錛?br />&nbsp; &nbsp; &nbsp;鎴戜滑鍙互鍒╃敤綾昏杞界▼搴忔潵瑙ｅ喅榪欎釜闂銆?br /><div style="font-size: 13px; border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: #cccccc; border-right-color: #cccccc; border-bottom-color: #cccccc; border-left-color: #cccccc; border-image: initial; padding-right: 5px; padding-bottom: 4px; padding-left: 4px; padding-top: 4px; width: 98%; word-break: break-all; background-color: #eeeeee; "><!--<br /><br />Code highlighting produced by Actipro CodeHighlighter (freeware)<br />http://www.CodeHighlighter.com/<br /><br />--><span style="color: #008080; ">1</span>&nbsp;<span style="color: #0000FF; ">public</span>&nbsp;<span style="color: #0000FF; ">class</span>&nbsp;Singleton&nbsp;{<br /><span style="color: #008080; ">2</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">private</span>&nbsp;<span style="color: #0000FF; ">static</span>&nbsp;<span style="color: #0000FF; ">class</span>&nbsp;Instance{<br /><span style="color: #008080; ">3</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">static</span>&nbsp;<span style="color: #0000FF; ">final</span>&nbsp;Singleton&nbsp;instance&nbsp;=&nbsp;<span style="color: #0000FF; ">new</span>&nbsp;Singleton();<br /><span style="color: #008080; ">4</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">public</span>&nbsp;<span style="color: #0000FF; ">static</span>&nbsp;Singleton&nbsp;getInstance(){<br /><span style="color: #008080; ">5</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span style="color: #0000FF; ">return</span>&nbsp;&nbsp;Instance.instance;<br /><span style="color: #008080; ">6</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br /><span style="color: #008080; ">7</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}<br /><span style="color: #008080; ">8</span>&nbsp;}</div>&nbsp; &nbsp;榪欎釜鏂規涔嬫墍浠ュ鏁堬紝鏄洜涓哄唴閮ㄧ被錛圛nstance錛夊彧琚杞戒竴嬈★紝鎵�浠ュ彧浼氬垱寤轟竴涓猄ingleton瀵硅薄銆?br /><br /><br />鍙傝�冿細<br />1.銆婅璁℃ā寮忚В鏋愩�婼ingleton妯″紡鍜孌CL妯″紡<br />2.鎺㈢儲璁捐妯″紡涔嬪叚&#8212;&#8212;鍗曚緥妯″紡<img src ="http://www.tkk7.com/hqjma/aggbug/384116.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.tkk7.com/hqjma/" target="_blank">hqjma</a> 2012-07-27 01:04 <a href="http://www.tkk7.com/hqjma/articles/384116.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item></channel></rss>            <footer>
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