{"id":31705,"date":"2023-04-26T22:35:05","date_gmt":"2024-03-06T05:05:33","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8java%e4%b8%ad%e4%bd%bf%e7%94%a8%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/"},"modified":"2024-04-30T01:27:24","modified_gmt":"2024-04-29T17:27:24","slug":"%e5%9c%a8java%e4%b8%ad%e4%bd%bf%e7%94%a8%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%9c%a8java%e4%b8%ad%e4%bd%bf%e7%94%a8%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/","title":{"rendered":"\u5728Java\u4e2d\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f"},"content":{"rendered":"<h1>\u9996\u5148<\/h1>\n<p>\u6211\u5c06\u603b\u7ed3\u6211\u5b66\u5230\u7684\u5185\u5bb9\uff0c\u8fd9\u662f\u901a\u8fc7\u9605\u8bfb\u4ecb\u7ecdGoF\u8bbe\u8ba1\u6a21\u5f0f\u7684\u300a\u589e\u8865\u6539\u8ba2\u7248Java\u8bed\u8a00\u5b66\u4e60\u8bbe\u8ba1\u6a21\u5f0f\u5165\u95e8\u300b\u5f97\u6765\u7684\u3002<\/p>\n<h1>\u5355\u4f8b\u6a21\u5f0f<\/h1>\n<h2>\u72ec\u8eab\u4e3b\u4e49\u662f\u6307<\/h2>\n<p>\u5728\u4e2d\u6587\u4e2d\uff0c\u5c06\u5176\u7ffb\u8bd1\u6210\u300c\u5355\u4f8b\u6a21\u5f0f\u300d\uff0c\u8868\u793a\u53ea\u5b58\u5728\u4e8e\u4e00\u4e2a\u6574\u4f53\u96c6\u5408\u4e2d\u7684\u4e00\u5f20\u7279\u5b9a\u7684\u7eb8\u724c\uff0c\u4ece\u800c\u4fdd\u8bc1\u6574\u4e2a\u7cfb\u7edf\u4e2d\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\u5b58\u5728\u3002<\/p>\n<h2>\u89d2\u8272\u51fa\u573a<\/h2>\n<div><img decoding=\"async\" class=\"post-images\" title=\"\" src=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0dce37434c4406bebaf9\/6-0.png\" alt=\"image.png\" \/><\/div>\n<h2>\u5177\u4f53\u7684\u4f8b\u5b50<\/h2>\n<p>\u8bf7\u4ee5singleton\u7c7b\u548c\u6267\u884c\u7c7b\u4e3a\u4f8b\u8fdb\u884c\u5177\u4f53\u8bf4\u660e\u3002<\/p>\n<h3>\u5b9e\u73b0\u7c7b<\/h3>\n<p>Singleton\u30af\u30e9\u30b9<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">package<\/span> <span class=\"nn\">singleton<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Singleton<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/ 1.static\u30d5\u30a3\u30fc\u30eb\u30c9(\u30af\u30e9\u30b9\u5909\u6570)\u3068\u3057\u3066singleton\u3092\u5b9a\u7fa9<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"kd\">static<\/span> <span class=\"nc\">Singleton<\/span> <span class=\"n\">singleton<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Singleton<\/span><span class=\"o\">();<\/span>\r\n\r\n    <span class=\"c1\">\/\/ 2.private\u306a\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/span>\r\n    <span class=\"kd\">private<\/span> <span class=\"nf\">Singleton<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u751f\u6210\u306b\u6210\u529f\u3057\u307e\u3057\u305f\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n\r\n    <span class=\"c1\">\/\/ 3.singleton\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u8fd4\u5374<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"nc\">Singleton<\/span> <span class=\"nf\">getInstance<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"n\">singleton<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u662f\u4e09\u4e2a\u8981\u70b9\uff1a<br \/>\n1.\u5c06singleton\u5b9a\u4e49\u4e3a\u79c1\u6709\u7684\u7c7b\u53d8\u91cf\u3002<br \/>\n2.\u6784\u9020\u51fd\u6570\u88ab\u8bbe\u7f6e\u4e3a\u79c1\u6709\u7684\uff0c\u65e0\u6cd5\u4ece\u5176\u4ed6\u7c7b\u4e2d\u8c03\u7528\uff08\u65e0\u6cd5\u4f7f\u7528new\u5173\u952e\u5b57\uff09\u3002<br \/>\n3.\u5b9a\u4e49\u4e86\u8fd4\u56desingleton\u5b9e\u4f8b\u7684getInstance()\u65b9\u6cd5\u3002<\/p>\n<p>\u9996\u5148\uff0c\u4f1a\u4ece\u5916\u90e8\u7c7b\u8c03\u7528public\u7684getInstance\uff08\uff09\u65b9\u6cd5\u3002<br \/>\n\u5982\u679c\u662f\u7b2c\u4e00\u6b21\u8c03\u7528\uff0c\u5c06\u521d\u59cb\u5316Singleton\u7c7b\uff0c\u5e76\u5728\u6b64\u65f6\u751f\u6210Singleton\u7c7b\u7684\u552f\u4e00\u5b9e\u4f8b\u3002<br \/>\n\u4e4b\u540e\uff0c\u5982\u679c\u518d\u6b21\u8c03\u7528getInstance\uff08\uff09\u65b9\u6cd5\uff0c\u5c06\u8fd4\u56de\u5df2\u7ecf\u751f\u6210\u7684Singleton\u7c7b\u7684\u5b9e\u4f8b\u3002<br \/>\n\u5728\u6784\u9020\u51fd\u6570\u4e2d\uff0c\u4f1a\u8f93\u51fa\u5b9e\u4f8b\u751f\u6210\u6210\u529f\u7684\u4fe1\u606f\uff0c\u4f46\u901a\u5e38\u662f\u4e0d\u5fc5\u8981\u7684\u3002<\/p>\n<h3>\u6267\u884c\u7c7b<\/h3>\n<p>Main\u30af\u30e9\u30b9<br \/>\ngetInstance()\u30e1\u30bd\u30c3\u30c9\u30922\u56de\u547c\u3073\u51fa\u3057\u3001\u540c\u3058\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u53d6\u5f97\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kn\">package<\/span> <span class=\"nn\">singleton<\/span><span class=\"o\">;<\/span>\r\n\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Main<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"***\u5b9f\u884c\u30af\u30e9\u30b9\u958b\u59cb***\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"nc\">Singleton<\/span> <span class=\"n\">obj1<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Singleton<\/span><span class=\"o\">.<\/span><span class=\"na\">getInstance<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"nc\">Singleton<\/span> <span class=\"n\">obj2<\/span> <span class=\"o\">=<\/span> <span class=\"nc\">Singleton<\/span><span class=\"o\">.<\/span><span class=\"na\">getInstance<\/span><span class=\"o\">();<\/span>\r\n        <span class=\"k\">if<\/span> <span class=\"o\">(<\/span><span class=\"n\">obj1<\/span> <span class=\"o\">==<\/span> <span class=\"n\">obj2<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"obj1 is obj2\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"o\">}<\/span> <span class=\"k\">else<\/span> <span class=\"o\">{<\/span>\r\n            <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"obj1 is not obj2\"<\/span><span class=\"o\">);<\/span>\r\n        <span class=\"o\">}<\/span>\r\n        <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"***\u5b9f\u884c\u30af\u30e9\u30b9\u7d42\u4e86***\"<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u6267\u884c\u7ed3\u679c<\/h3>\n<p>\u8fd0\u884cMain.java\u7684\u7ed3\u679c\u5982\u4e0b\uff1a<br \/>\n\u8f93\u51fa\u4e86obj1 is obj2\uff0c\u5e76\u4e14\u53ef\u4ee5\u786e\u8ba4\u83b7\u53d6\u5230\u4e86\u76f8\u540c\u7684\u5b9e\u4f8b\u3002<\/p>\n<pre class=\"post-pre\"><code>***\u5b9f\u884c\u30af\u30e9\u30b9\u958b\u59cb***\r\n\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u751f\u6210\u306b\u6210\u529f\u3057\u307e\u3057\u305f\r\nobj1 is obj2\r\n***\u5b9f\u884c\u30af\u30e9\u30b9\u7d42\u4e86***\r\n<\/code><\/pre>\n<h2>\u4f18\u70b9<\/h2>\n<p>\u901a\u8fc7\u4f7f\u7528Singleton\u6a21\u5f0f\uff0c\u53ef\u4ee5\u4fdd\u8bc1\u6574\u4e2a\u7cfb\u7edf\u4e2d\u53ea\u5b58\u5728\u4e00\u4e2a\u5b9e\u4f8b\u3002<br \/>\n\u8fd9\u6837\u4e00\u6765\uff0c\u5c31\u53ef\u4ee5\u9632\u6b62\u591a\u4e2a\u5b9e\u4f8b\u76f8\u4e92\u5e72\u6270\uff0c\u907f\u514d\u610f\u5916\u7684\u9519\u8bef\u53d1\u751f\u3002<\/p>\n<h1>\u7efc\u4e0a\u6240\u8ff0<\/h1>\n<p>\u6211\u5b66\u5230\u4e86\u4fdd\u8bc1\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\u5b58\u5728\u7684Singleton\u6a21\u5f0f\u3002<br \/>\n\u5982\u679c\u60a8\u65b9\u4fbf\u7684\u8bdd\uff0c\u8bf7\u53c2\u8003\u4e0b\u9762\u7684\u793a\u4f8b\u4ee3\u7801\u3002<\/p>\n<ul class=\"post-ul\">Singleton\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/ul>\n<p>\u6b64\u5916\uff0c\u5173\u4e8e\u5176\u4ed6\u8bbe\u8ba1\u6a21\u5f0f\u7684\u8be6\u7ec6\u4fe1\u606f\u5df2\u5728\u4e0b\u9762\u6574\u7406\uff0c\u8bf7\u60a8\u4e5f\u53c2\u8003\u3002<\/p>\n<ul class=\"post-ul\">[\u968f\u6642\u66f4\u65b0]Java\u3067\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u307e\u3068\u3081<\/ul>\n<h1>\u8cc7\u6599\u4f86\u6e90<\/h1>\n<ul class=\"post-ul\">\u5897\u88dc\u6539\u8a02\u7248 Java\u8a00\u8a9e\u3067\u5b66\u3076\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u5165\u9580<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u9996\u5148 \u6211\u5c06\u603b\u7ed3\u6211\u5b66\u5230\u7684\u5185\u5bb9\uff0c\u8fd9\u662f\u901a\u8fc7\u9605\u8bfb\u4ecb\u7ecdGoF\u8bbe\u8ba1\u6a21\u5f0f\u7684\u300a\u589e\u8865\u6539\u8ba2\u7248Java\u8bed\u8a00\u5b66\u4e60\u8bbe\u8ba1\u6a21\u5f0f\u5165\u95e8\u300b\u5f97\u6765\u7684\u3002 [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31705","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5728Java\u4e2d\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728java\u4e2d\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5728Java\u4e2d\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148 \u6211\u5c06\u603b\u7ed3\u6211\u5b66\u5230\u7684\u5185\u5bb9\uff0c\u8fd9\u662f\u901a\u8fc7\u9605\u8bfb\u4ecb\u7ecdGoF\u8bbe\u8ba1\u6a21\u5f0f\u7684\u300a\u589e\u8865\u6539\u8ba2\u7248Java\u8bed\u8a00\u5b66\u4e60\u8bbe\u8ba1\u6a21\u5f0f\u5165\u95e8\u300b\u5f97\u6765\u7684\u3002 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5728java\u4e2d\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-06T05:05:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T17:27:24+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0dce37434c4406bebaf9\/6-0.png\" \/>\n<meta name=\"author\" content=\"\u6587, \u7fd4\" \/>\n<meta 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