{"id":1013,"date":"2010-10-02T00:35:08","date_gmt":"2010-10-02T00:35:08","guid":{"rendered":"http:\/\/enjoyasp.net\/?p=1013"},"modified":"2010-10-02T00:35:08","modified_gmt":"2010-10-02T00:35:08","slug":"spring%e4%b8%adbean%e7%9a%84%e4%bd%9c%e7%94%a8%e5%9f%9f","status":"publish","type":"post","link":"https:\/\/enjoyasp.net\/index.php\/2010\/10\/02\/spring%e4%b8%adbean%e7%9a%84%e4%bd%9c%e7%94%a8%e5%9f%9f\/","title":{"rendered":"Spring\u4e2dbean\u7684\u4f5c\u7528\u57df"},"content":{"rendered":"<pre lang=\"java\">\r\nSpring\u4e2dbean\u7684\u4f5c\u7528\u57df\r\n\r\n\r\n\u5728spring2.0\u4e4b\u524dbean\u53ea\u67092\u79cd\u4f5c\u7528\u57df\u5373\uff1asingleton(\u5355\u4f8b)\u3001non-singleton\uff08\u4e5f\u79f0 prototype\uff09, Spring2.0\u4ee5\u540e\uff0c\u589e\u52a0\u4e86session\u3001request\u3001global session\u4e09\u79cd\u4e13\u7528\u4e8eWeb\u5e94\u7528\u7a0b\u5e8f\u4e0a\u4e0b\u6587\u7684Bean\u3002\u56e0\u6b64\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0bSpring2.0\u73b0\u5728\u6709\u4e94\u79cd\u7c7b\u578b\u7684Bean\u3002\u5f53\u7136\uff0cSpring2.0\u5bf9 Bean\u7684\u7c7b\u578b\u7684\u8bbe\u8ba1\u8fdb\u884c\u4e86\u91cd\u6784\uff0c\u5e76\u8bbe\u8ba1\u51fa\u7075\u6d3b\u7684Bean\u7c7b\u578b\u652f\u6301\uff0c\u7406\u8bba\u4e0a\u53ef\u4ee5\u6709\u65e0\u6570\u591a\u79cd\u7c7b\u578b\u7684Bean\uff0c\u7528\u6237\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u9700\u8981\uff0c\u589e\u52a0\u65b0\u7684Bean\u7c7b\u578b\uff0c\u6ee1\u8db3\u5b9e\u9645\u5e94\u7528\u9700\u6c42\u3002\r\n\r\n1\u3001singleton\u4f5c\u7528\u57df\uff08\u7f3a\u7701\uff09\r\n\u5f53\u4e00\u4e2abean\u7684\u4f5c\u7528\u57df\u8bbe\u7f6e\u4e3asingleton, \u90a3\u4e48Spring IOC\u5bb9\u5668\u4e2d\u53ea\u4f1a\u5b58\u5728\u4e00\u4e2a\u5171\u4eab\u7684bean\u5b9e\u4f8b\uff0c\u5e76\u4e14\u6240\u6709\u5bf9bean\u7684\u8bf7\u6c42\uff0c\u53ea\u8981id\u4e0e\u8be5bean\u5b9a\u4e49\u76f8\u5339\u914d\uff0c\u5219\u53ea\u4f1a\u8fd4\u56debean\u7684\u540c\u4e00\u5b9e\u4f8b\u3002\u6362\u8a00\u4e4b\uff0c\u5f53\u628a\u4e00\u4e2abean\u5b9a\u4e49\u8bbe\u7f6e\u4e3asingleton\u4f5c\u7528\u57df\u65f6\uff0cSpring IOC\u5bb9\u5668\u53ea\u4f1a\u521b\u5efa\u8be5bean\u5b9a\u4e49\u7684\u552f\u4e00\u5b9e\u4f8b\u3002\u8fd9\u4e2a\u5355\u4e00\u5b9e\u4f8b\u4f1a\u88ab\u5b58\u50a8\u5230\u5355\u4f8b\u7f13\u5b58\uff08singleton cache\uff09\u4e2d\uff0c\u5e76\u4e14\u6240\u6709\u9488\u5bf9\u8be5bean\u7684\u540e\u7eed\u8bf7\u6c42\u548c\u5f15\u7528\u90fd\u5c06\u8fd4\u56de\u88ab\u7f13\u5b58\u7684\u5bf9\u8c61\u5b9e\u4f8b\uff0c\u8fd9\u91cc\u8981\u6ce8\u610f\u7684\u662fsingleton\u4f5c\u7528\u57df\u548cGOF\u8bbe\u8ba1\u6a21\u5f0f\u4e2d\u7684\u5355\u4f8b\u662f\u5b8c\u5168\u4e0d\u540c\u7684\uff0c\u5355\u4f8b\u8bbe\u8ba1\u6a21\u5f0f\u8868\u793a\u4e00\u4e2aClassLoader\u4e2d\u53ea\u6709\u4e00\u4e2aclass\u5b58\u5728\uff0c\u800c\u8fd9\u91cc\u7684singleton\u5219\u8868\u793a\u4e00\u4e2a\u5bb9\u5668\u5bf9\u5e94\u4e00\u4e2abean\uff0c\u4e5f\u5c31\u662f\u8bf4\u5f53\u4e00\u4e2abean\u88ab\u6807\u8bc6\u4e3asingleton\u65f6\u5019\uff0cspring\u7684IOC\u5bb9\u5668\u4e2d\u53ea\u4f1a\u5b58\u5728\u4e00\u4e2a\u8be5bean\u3002\r\n\u914d\u7f6e\u5b9e\u4f8b\uff1a\r\n<bean id=\"role\" class=\"spring.chapter2.maryGame.Role\" scope=\"singleton\"\/>\r\n\u6216\u8005\r\n<bean id=\"role\" class=\"spring.chapter2.maryGame.Role\" singleton=\"true\"\/>\r\n\r\n\r\n2\u3001prototype\r\nprototype\u4f5c\u7528\u57df\u90e8\u7f72\u7684bean\uff0c\u6bcf\u4e00\u6b21\u8bf7\u6c42\uff08\u5c06\u5176\u6ce8\u5165\u5230\u53e6\u4e00\u4e2abean\u4e2d\uff0c\u6216\u8005\u4ee5\u7a0b\u5e8f\u7684\u65b9\u5f0f\u8c03\u7528\u5bb9\u5668\u7684getBean()\u65b9\u6cd5\uff09\u90fd\u4f1a\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684bean\u5b9e\u4f8b\uff0c\u76f8\u5f53\u4e00\u4e2anew\u7684\u64cd\u4f5c\uff0c\u5bf9\u4e8eprototype\u4f5c\u7528\u57df\u7684bean\uff0c\u6709\u4e00\u70b9\u975e\u5e38\u91cd\u8981\uff0c\u90a3\u5c31\u662fSpring\u4e0d\u80fd\u5bf9\u4e00\u4e2aprototype bean\u7684\u6574\u4e2a\u751f\u547d\u5468\u671f\u8d1f\u8d23\uff0c\u5bb9\u5668\u5728\u521d\u59cb\u5316\u3001\u914d\u7f6e\u3001\u88c5\u9970\u6216\u8005\u662f\u88c5\u914d\u5b8c\u4e00\u4e2aprototype\u5b9e\u4f8b\u540e\uff0c\u5c06\u5b83\u4ea4\u7ed9\u5ba2\u6237\u7aef\uff0c\u968f\u540e\u5c31\u5bf9\u8be5prototype\u5b9e\u4f8b\u4e0d\u95fb\u4e0d\u95ee\u4e86\u3002\u4e0d\u7ba1\u4f55\u79cd\u4f5c\u7528\u57df\uff0c\u5bb9\u5668\u90fd\u4f1a\u8c03\u7528\u6240\u6709\u5bf9\u8c61\u7684\u521d\u59cb\u5316\u751f\u547d\u5468\u671f\u56de\u8c03\u65b9\u6cd5\uff0c\u800c\u5bf9prototype\u800c\u8a00\uff0c\u4efb\u4f55\u914d\u7f6e\u597d\u7684\u6790\u6784\u751f\u547d\u5468\u671f\u56de\u8c03\u65b9\u6cd5\u90fd\u5c06\u4e0d\u4f1a\u88ab\u8c03\u7528\u3002\u6e05\u9664prototype\u4f5c\u7528\u57df\u7684\u5bf9\u8c61\u5e76\u91ca\u653e\u4efb\u4f55prototype bean\u6240\u6301\u6709\u7684\u6602\u8d35\u8d44\u6e90\uff0c\u90fd\u662f\u5ba2\u6237\u7aef\u4ee3\u7801\u7684\u804c\u8d23\u3002\uff08\u8ba9Spring\u5bb9\u5668\u91ca\u653e\u88absingleton\u4f5c\u7528\u57dfbean\u5360\u7528\u8d44\u6e90\u7684\u4e00\u79cd\u53ef\u884c\u65b9\u5f0f\u662f\uff0c\u901a\u8fc7\u4f7f\u7528 bean\u7684\u540e\u7f6e\u5904\u7406\u5668\uff0c\u8be5\u5904\u7406\u5668\u6301\u6709\u8981\u88ab\u6e05\u9664\u7684bean\u7684\u5f15\u7528\u3002\uff09\r\n\u914d\u7f6e\u5b9e\u4f8b\uff1a\r\n<bean id=\"role\" class=\"spring.chapter2.maryGame.Role\" scope=\"prototype\"\/>\r\n\u6216\u8005\r\n<beanid=\"role\" class=\"spring.chapter2.maryGame.Role\" singleton=\"false\"\/>\r\n\r\n3\u3001request\r\nrequest\u8868\u793a\u8be5\u9488\u5bf9\u6bcf\u4e00\u6b21HTTP\u8bf7\u6c42\u90fd\u4f1a\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684bean\uff0c\u540c\u65f6\u8be5bean\u4ec5\u5728\u5f53\u524dHTTP request\u5185\u6709\u6548\u3002\r\nrequest\u3001session\u3001global session\u4f7f\u7528\u7684\u65f6\u5019\u9996\u5148\u8981\u5728web.xml\u4e2d\u505a\u5982\u4e0b\u914d\u7f6e\uff1a\r\n\r\n\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662fServlet 2.4\u53ca\u4ee5\u4e0a\u7684web\u5bb9\u5668\uff0c\u90a3\u4e48\u4f60\u4ec5\u9700\u8981\u5728web\u5e94\u7528\u7684XML\u58f0\u660e\u6587\u4ef6web.xml\u4e2d\u589e\u52a0\u4e0b\u8ff0ContextListener\u5373\u53ef\uff1a\r\n<web-app>\r\n...\r\n<listener>\r\n<listener-class>org.springframework.web.context.request.RequestContextListener<\/listener-class>\r\n<\/listener>\r\n...\r\n<\/web-app>\r\n\r\n\uff0c\u5982\u679c\u662fServlet2.4\u4ee5\u524d\u7684web\u5bb9\u5668,\u90a3\u4e48\u4f60\u8981\u4f7f\u7528\u4e00\u4e2ajavax.servlet.Filter\u7684\u5b9e\u73b0\uff1a\r\n<web-app>\r\n..\r\n<filter>\r\n<filter-name>requestContextFilter<\/filter-name>\r\n<filter-class>org.springframework.web.filter.RequestContextFilter<\/filter-class>\r\n<\/filter>\r\n<filter-mapping>\r\n<filter-name>requestContextFilter<\/filter-name>\r\n<url-pattern>\/*<\/url-pattern>\r\n<\/filter-mapping>\r\n...\r\n<\/web-app>\r\n\r\n\u63a5\u7740\u65e2\u53ef\u4ee5\u914d\u7f6ebean\u7684\u4f5c\u7528\u57df\u4e86\uff1a\r\n<bean id=\"role\" class=\"spring.chapter2.maryGame.Role\" scope=\"request\"\/>\r\n\r\n\r\n4\u3001session\r\nsession\u4f5c\u7528\u57df\u8868\u793a\u8be5\u9488\u5bf9\u6bcf\u4e00\u6b21HTTP\u8bf7\u6c42\u90fd\u4f1a\u4ea7\u751f\u4e00\u4e2a\u65b0\u7684bean\uff0c\u540c\u65f6\u8be5bean\u4ec5\u5728\u5f53\u524dHTTP session\u5185\u6709\u6548\uff0c\u914d\u7f6e\u5b9e\u4f8b\uff1a\r\n\u914d\u7f6e\u5b9e\u4f8b\uff1a\r\n\u548crequest\u914d\u7f6e\u5b9e\u4f8b\u7684\u524d\u63d0\u4e00\u6837\uff0c\u914d\u7f6e\u597dweb\u542f\u52a8\u6587\u4ef6\u5c31\u53ef\u4ee5\u5982\u4e0b\u914d\u7f6e\uff1a\r\n<bean id=\"role\" class=\"spring.chapter2.maryGame.Role\" scope=\"session\"\/>\r\n\r\n\r\n5\u3001global session\r\nglobal session\u4f5c\u7528\u57df\u7c7b\u4f3c\u4e8e\u6807\u51c6\u7684HTTP Session\u4f5c\u7528\u57df\uff0c\u4e0d\u8fc7\u5b83\u4ec5\u4ec5\u5728\u57fa\u4e8eportlet\u7684web\u5e94\u7528\u4e2d\u624d\u6709\u610f\u4e49\u3002Portlet\u89c4\u8303\u5b9a\u4e49\u4e86\u5168\u5c40Session\u7684\u6982\u5ff5\uff0c\u5b83\u88ab\u6240\u6709\u6784\u6210\u67d0\u4e2a portlet web\u5e94\u7528\u7684\u5404\u79cd\u4e0d\u540c\u7684portlet\u6240\u5171\u4eab\u3002\u5728global session\u4f5c\u7528\u57df\u4e2d\u5b9a\u4e49\u7684bean\u88ab\u9650\u5b9a\u4e8e\u5168\u5c40portlet Session\u7684\u751f\u547d\u5468\u671f\u8303\u56f4\u5185\u3002\u5982\u679c\u4f60\u5728web\u4e2d\u4f7f\u7528global session\u4f5c\u7528\u57df\u6765\u6807\u8bc6bean\uff0c\u90a3\u4e48web\u4f1a\u81ea\u52a8\u5f53\u6210session\u7c7b\u578b\u6765\u4f7f\u7528\u3002\r\n\u914d\u7f6e\u5b9e\u4f8b\uff1a\r\n\u548crequest\u914d\u7f6e\u5b9e\u4f8b\u7684\u524d\u63d0\u4e00\u6837\uff0c\u914d\u7f6e\u597dweb\u542f\u52a8\u6587\u4ef6\u5c31\u53ef\u4ee5\u5982\u4e0b\u914d\u7f6e\uff1a\r\n<bean id=\"role\" class=\"spring.chapter2.maryGame.Role\" scope=\"global session\"\/>\r\n\r\n\r\n6\u3001\u81ea\u5b9a\u4e49bean\u88c5\u914d\u4f5c\u7528\u57df\r\n\u5728spring2.0\u4e2d\u4f5c\u7528\u57df\u662f\u53ef\u4ee5\u4efb\u610f\u6269\u5c55\u7684\uff0c\u4f60\u53ef\u4ee5\u81ea\u5b9a\u4e49\u4f5c\u7528\u57df\uff0c\u751a\u81f3\u4f60\u4e5f\u53ef\u4ee5\u91cd\u65b0\u5b9a\u4e49\u5df2\u6709\u7684\u4f5c\u7528\u57df\uff08\u4f46\u662f\u4f60\u4e0d\u80fd\u8986\u76d6singleton\u548c prototype\uff09\uff0cspring\u7684\u4f5c\u7528\u57df\u7531\u63a5\u53e3org.springframework.beans.factory.config.Scope\u6765\u5b9a\u4e49\uff0c\u81ea\u5b9a\u4e49\u81ea\u5df1\u7684\u4f5c\u7528\u57df\u53ea\u8981\u5b9e\u73b0\u8be5\u63a5\u53e3\u5373\u53ef\uff0c\u4e0b\u9762\u7ed9\u4e2a\u5b9e\u4f8b\uff1a\r\n\u6211\u4eec\u5efa\u7acb\u4e00\u4e2a\u7ebf\u7a0b\u7684scope\uff0c\u8be5scope\u5728\u8868\u793a\u4e00\u4e2a\u7ebf\u7a0b\u4e2d\u6709\u6548\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a\r\npublicclass MyScope implements Scope {\r\nprivatefinal ThreadLocal threadScope = new ThreadLocal() {\r\n  protected Object initialValue(){\r\n     returnnew HashMap();\r\n   }\r\n};\r\npublic Object get(String name, ObjectFactory objectFactory) {\r\n Map scope = (Map) threadScope.get();\r\n Object object = scope.get(name);\r\nif(object==null){\r\n   object = objectFactory.getObject();\r\n   scope.put(name, object);\r\n }\r\nreturn object;\r\n}\r\npublic Object remove(String name){\r\n Map scope = (Map) threadScope.get();\r\nreturn scope.remove(name);\r\n}\r\npublicvoid registerDestructionCallback(String name, Runnable callback) {\r\n}\r\npublic String getConversationId() {\r\n\/\/ TODO Auto-generated method stub\r\nreturnnull;\r\n}\r\n   }\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Spring\u4e2dbean\u7684\u4f5c\u7528\u57df \u5728spring2.0\u4e4b\u524dbean\u53ea\u67092\u79cd\u4f5c\u7528\u57df\u5373\uff1asingleton(\u5355\u4f8b)\u3001 [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[],"class_list":["post-1013","post","type-post","status-publish","format-standard","hentry","category-spring"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/1013","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/comments?post=1013"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/1013\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=1013"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=1013"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=1013"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}