{"id":30964,"date":"2023-09-24T10:15:17","date_gmt":"2022-11-10T06:58:23","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/"},"modified":"2025-08-12T21:37:06","modified_gmt":"2025-08-12T13:37:06","slug":"java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/","title":{"rendered":"Java\u7684\u5355\u4f8b\u6a21\u5f0f"},"content":{"rendered":"<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4e00\u3064\u306eJVM\u3001Java\u30b5\u30fc\u30d0\u30fc\u306e\u4e2d\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9)\u304c1\u3064\u3060\u3051\u751f\u6210\u3055\u308c\u3001\u5171\u6709\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3059\u308b\u30c7\u30b6\u30a4\u30f3\u30d1\u30bf\u30fc\u30f3\u3067\u3042\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u30922\u3064\u4ee5\u4e0a\u751f\u6210\u3067\u304d\u306a\u3044\u3088\u3046\u306bprivate\u751f\u6210\u8005\u3092\u4f7f\u7528\u3057\u3001\u5916\u90e8\u3067\u4efb\u610f\u306bnew\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3067\u304d\u306a\u3044\u3088\u3046\u306b\u9632\u3050\u3002<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u307b\u3068\u3093\u3069\u306eSpring\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306fWeb\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u3001\u901a\u5e38\u3001\u8907\u6570\u306e\u9867\u5ba2\u304c\u540c\u6642\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u884c\u3046\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u9867\u5ba2\u304c\u8981\u8acb\u3059\u308b\u305f\u3073\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u3089\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u304c\u3001\u305d\u3046\u3059\u308b\u3068\u30e1\u30e2\u30ea\u306e\u6d6a\u8cbb\u304c\u6fc0\u3057\u3044\u3002<\/ul>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5982\u679c\u4e0d\u662f\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u6bcf\u6b21\u8c03\u7528\u65f6\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u5bf9\u8c61\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>package hello.hellospring;<\/p>\n<p>import hello.hellospring.member.MemberService;<br \/>\nimport hello.hellospring.member.MemberServiceImpl;<br \/>\nimport org.assertj.core.api.Assertions;<br \/>\nimport org.junit.jupiter.api.Test;<\/p>\n<p>public class SingleToneTest {<\/p>\n<p>@Test<br \/>\nvoid notSingleTone() {<br \/>\nAppConfig appConfig = new AppConfig();<\/p>\n<p>\/\/ \u6bcf\u6b21\u8c03\u7528\u65f6\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u5bf9\u8c61\u3002<br \/>\nMemberService memberService1 = appConfig.memberService();<br \/>\nMemberService memberService2 = appConfig.memberService();<br \/>\nSystem.out.println(memberService1);<br \/>\nSystem.out.println(memberService2);<br \/>\nAssertions.assertThat(memberService1).isNotSameAs(memberService2);<br \/>\n}<br \/>\n}<\/p>\n<p>\u5982\u679c\u4f7f\u7528\u5355\u4f8b\u6a21\u5f0f<br \/>\n\u53ea\u4f1a\u751f\u6210\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5e76\u5171\u4eab\u5b83\u3002<\/p>\n<p>\u53ef\u4ee5\u8282\u7701\u5185\u5b58\u7a7a\u95f4\u3002<br \/>\n\u9664\u4e86\u4ee5\u4e0b\u793a\u4f8b\u4e4b\u5916\uff0c\u8fd8\u6709\u5f88\u591a\u5176\u4ed6\u5b9e\u73b0\u5355\u4f8b\u6a21\u5f0f\u7684\u65b9\u6cd5\u3002<br \/>\npackage hello.hellospring.singletone;<\/p>\n<p>public class SingletoneService {<\/p>\n<p>\/\/ 1.\u5728\u9759\u6001\u533a\u57df\u521b\u5efa\u4e00\u4e2a\u552f\u4e00\u7684\u5bf9\u8c61\u3002<br \/>\nprivate static final SingletoneService instance = new SingletoneService();<\/p>\n<p>\/\/ 2.\u901a\u8fc7\u516c\u5171\u65b9\u6cd5\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u53ea\u80fd\u901a\u8fc7\u8fd9\u4e2a\u9759\u6001\u65b9\u6cd5\u6765\u83b7\u53d6\u5bf9\u8c61\u5b9e\u4f8b\u3002<br \/>\npublic static SingletoneService getInstance() {<br \/>\nreturn instance;<br \/>\n}<\/p>\n<p>\/\/ 3.\u5c06\u6784\u9020\u51fd\u6570\u8bbe\u4e3a\u79c1\u6709\uff0c\u9632\u6b62\u4ece\u5916\u90e8\u4f7f\u7528 new \u5173\u952e\u5b57\u6765\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u3002<br \/>\nprivate SingletoneService() {<\/p>\n<p>}<br \/>\n}<\/p>\n<p>package hello.hellospring;<\/p>\n<p>import hello.hellospring.singletone.SingletoneService;<br \/>\nimport org.assertj.core.api.Assertions;<br \/>\nimport org.junit.jupiter.api.Test;<\/p>\n<p>public class SingleToneTest {<\/p>\n<p>@Test<br \/>\nvoid singleToneTest() {<br \/>\nSingletoneService singletoneService1 = SingletoneService.getInstance();<br \/>\nSystem.out.println(singletoneService1);<br \/>\nSingletoneService singletoneService2 = SingletoneService.getInstance();<br \/>\nSystem.out.println(singletoneService2);<br \/>\nAssertions.assertThat(singletoneService1).isSameAs(singletoneService2);<br \/>\n}<br \/>\n}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3064\u306eJVM\u3001Java\u30b5\u30fc\u30d0\u30fc\u306e\u4e2d\u3067\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9)\u304c1\u3064\u3060\u3051\u751f\u6210\u3055\u308c\u3001\u5171\u6709\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3059\u308b\u30c7\u30b6 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-30964","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"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>Java\u7684\u5355\u4f8b\u6a21\u5f0f - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8eJava\u7684\u5355\u4f8b\u6a21\u5f0f\u7684\u6280\u672f\u6587\u7ae0\" \/>\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\/java\u7684\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=\"Java\u7684\u5355\u4f8b\u6a21\u5f0f\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8eJava\u7684\u5355\u4f8b\u6a21\u5f0f\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/java\u7684\u5355\u4f8b\u6a21\u5f0f\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2022-11-10T06:58:23+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T13:37:06+00:00\" \/>\n<meta name=\"author\" content=\"\u6e05, \u626c\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6e05, \u626c\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/\",\"name\":\"Java\u7684\u5355\u4f8b\u6a21\u5f0f - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2022-11-10T06:58:23+00:00\",\"dateModified\":\"2025-08-12T13:37:06+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/cb5556d2501da73d864cac945e8d9461\"},\"description\":\"\u5173\u4e8eJava\u7684\u5355\u4f8b\u6a21\u5f0f\u7684\u6280\u672f\u6587\u7ae0\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/zh\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Java\u7684\u5355\u4f8b\u6a21\u5f0f\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/cb5556d2501da73d864cac945e8d9461\",\"name\":\"\u6e05, \u626c\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/32a4239de8ff29adace466261d309424a1e5fe9f7e3036bf89fe03f2e3dbe717?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/32a4239de8ff29adace466261d309424a1e5fe9f7e3036bf89fe03f2e3dbe717?s=96&d=mm&r=g\",\"caption\":\"\u6e05, \u626c\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/qingyang\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Java\u7684\u5355\u4f8b\u6a21\u5f0f - Blog - Silicon Cloud","description":"\u5173\u4e8eJava\u7684\u5355\u4f8b\u6a21\u5f0f\u7684\u6280\u672f\u6587\u7ae0","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/java\u7684\u5355\u4f8b\u6a21\u5f0f\/","og_locale":"zh_CN","og_type":"article","og_title":"Java\u7684\u5355\u4f8b\u6a21\u5f0f","og_description":"\u5173\u4e8eJava\u7684\u5355\u4f8b\u6a21\u5f0f\u7684\u6280\u672f\u6587\u7ae0","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/java\u7684\u5355\u4f8b\u6a21\u5f0f\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2022-11-10T06:58:23+00:00","article_modified_time":"2025-08-12T13:37:06+00:00","author":"\u6e05, \u626c","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u6e05, \u626c","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"1 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/","name":"Java\u7684\u5355\u4f8b\u6a21\u5f0f - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2022-11-10T06:58:23+00:00","dateModified":"2025-08-12T13:37:06+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/cb5556d2501da73d864cac945e8d9461"},"description":"\u5173\u4e8eJava\u7684\u5355\u4f8b\u6a21\u5f0f\u7684\u6280\u672f\u6587\u7ae0","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.silicloud.com\/zh\/blog\/"},{"@type":"ListItem","position":2,"name":"Java\u7684\u5355\u4f8b\u6a21\u5f0f"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website","url":"https:\/\/www.silicloud.com\/zh\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/cb5556d2501da73d864cac945e8d9461","name":"\u6e05, \u626c","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/32a4239de8ff29adace466261d309424a1e5fe9f7e3036bf89fe03f2e3dbe717?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/32a4239de8ff29adace466261d309424a1e5fe9f7e3036bf89fe03f2e3dbe717?s=96&d=mm&r=g","caption":"\u6e05, \u626c"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/qingyang\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%9a%84%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/30964","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=30964"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/30964\/revisions"}],"predecessor-version":[{"id":95245,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/30964\/revisions\/95245"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=30964"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=30964"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=30964"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}