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&nbsp; 銆婅璁℃ā寮忋�嬩腑瀵筍ingleton妯″紡鐨勫畾涔変負(fù)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(xì)<br /><ol><li>鐢ㄤ竴涓柟娉曟潵瀹炰緥鍖栨墍闇�瀵硅薄銆備負(fù)浜嗕繚璇佽鏂規(guī)硶鏄敮涓�鑳藉疄渚嬪寲姝ょ被鍨嬪璞＄殑鏂規(guī)硶錛屾垜浠皢榪欎釜綾葷殑鏋勯�犲嚱鏁板畾涔変負(fù)淇濇姢鐨勬垨鑰呯鏈夌殑銆?/li><li>璋冪敤榪欎釜鏂規(guī)硶鏃訛紝鍏堣媯�(gè)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(guī)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(guī)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(guī)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(xì)<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(xì)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(fù)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(xì)<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(xì)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(guī)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(guī)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?xì)鍦ㄦ瀯閫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(guī)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?xì)鍒涘晦Z竴涓猄ingleton瀵硅薄銆?br /><br /><br />鍙傝�冿細(xì)<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(chǔ)璁捐妯″紡涔嬪叚&#8212;&#8212;鍗曚緥妯″紡<img src ="http://www.aygfsteel.com/hqjma/aggbug/384116.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.aygfsteel.com/hqjma/" target="_blank">hqjma</a> 2012-07-27 01:04 <a href="http://www.aygfsteel.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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