{"id":527,"date":"2016-05-17T19:32:11","date_gmt":"2016-05-17T11:32:11","guid":{"rendered":"http:\/\/www.xttblog.com\/?p=527"},"modified":"2017-10-09T17:37:00","modified_gmt":"2017-10-09T09:37:00","slug":"%e8%af%a6%e8%a7%a3%e8%8e%b7%e5%8f%96spring%e4%b8%adbean%e7%9a%84%e5%b7%a5%e5%85%b7%e7%b1%bb%e5%b0%81%e8%a3%85%e5%92%8cbean%e7%ae%a1%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.xttblog.com\/?p=527","title":{"rendered":"\u8be6\u89e3\u83b7\u53d6Spring\u4e2dbean\u7684\u5de5\u5177\u7c7b\u5c01\u88c5\u548cbean\u7ba1\u7406"},"content":{"rendered":"

\n\t\u6700\u8fd1\u6709\u540c\u5b66\u5728\u4f7f\u7528Spring\u7684bean\u7ba1\u7406\u65f6\uff0c\u51fa\u73b0\u4e86\u5f88\u4e25\u91cd\u7684\u95ee\u9898\uff0c\u9879\u76ee\u5728\u6bcf\u6b21\u91cd\u542f\u65f6\uff0c\u90fd\u4f1a\u629b\u51fa\u627e\u4e0d\u5230applicationContext.xml\u7684\u5f02\u5e38\u3002\u7a76\u5176\u539f\u56e0\u662f\u5bf9web.xml\u7684\u52a0\u8f7d\u987a\u5e8f\u4e0d\u7406\u89e3\u548c\u5bf9src\u7684\u9519\u8bef\u7406\u89e3\u5bfc\u81f4\u7684\uff0c\u73b0\u5c06\u7ecf\u9a8c\u5206\u4eab\u7ed9\u5927\u5bb6\uff01<\/u>
\n\tjava\u9879\u76ee\u7684\u76ee\u5f55\u7ed3\u6784<\/strong>
\n\tjava\u9879\u76ee\u4e2d\u4e00\u822c\u6709\u4e24\u4e2a\u91cd\u8981\u7684\u76ee\u5f55\uff0c\u4e00\u4e2a\u662fsrc\uff0c\u4e00\u4e2a\u662fbin\u3002
\n\tsrc\uff1a<\/span>\u662f\u6e90\u6587\u4ef6source\u7684\u610f\u601d\uff0c\u5b58\u653e\u7a0b\u5e8f\u5458\u7684\u4ee3\u7801\u7684\u5730\u65b9(.java\u6587\u4ef6),\u9879\u76ee\u53d1\u5e03\u6216\u6253\u5305\u540e\u4e0d\u4f1a\u5b58\u5728\u8be5\u76ee\u5f55.
\n\tbin\uff1a<\/span>\u5b58\u653e\u751f\u6210\u7684\u5b57\u8282\u7801.class\u6587\u4ef6\u7684\u5730\u65b9,\u9879\u76ee\u7f16\u8bd1\uff0c\u6253\u5305\u540e\u5b58\u5728.
\n\t\u73b0\u5728\u6211\u4eec\u5e94\u8be5\u77e5\u9053\u4e86\u5728\u9879\u76ee\u53d1\u5e03\u540e\u662f\u4e0d\u4f1a\u5b58\u5728src\u76ee\u5f55\u7684\uff0c\u56e0\u6b64\u4e0d\u8981\u5199System.getProperty("user.dir")+"\\\\src\\\\applicationContext.xml";<\/strong><\/span>\u7c7b\u4f3c\u7684\u4ee3\u7801\uff0c\u4ee5\u514d\u88ab\u5927\u5bb6\u5632\u7b11!
\n\tweb.xml\u52a0\u8f7d\u987a\u5e8f<\/strong>
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\n\t\u771f\u6b63\u7684\u52a0\u8f7d\u987a\u5e8f\u4e3a\uff1acontext-param -> listener -> filter -> servlet\u3002\u5f53\u7136\u540c\u7c7b\u578b\u7684\uff0c\u4f1a\u6309\u7167\u914d\u7f6e\u987a\u5e8f\u52a0\u8f7d\uff0c\u53e6\u5916\u8fd8\u53ef\u4ee5\u914d\u7f6e<load-on-startup>5<\/load-on-startup>\u6765\u6307\u5b9a\u52a0\u8f7d\u7684\u987a\u5e8f\u3002<\/span><\/span>\n<\/p>\n

\n

\n\tSpring\u7684bean\u7ba1\u7406\u5de5\u5177\u7c7b<\/span><\/strong>
\n\t1.ApplicationContextAware<\/strong>
\n\t    \u901a\u8fc7ApplicationContextAware\u63a5\u53e3\uff0c\u6211\u4eec\u6765\u5b9e\u73b0bean\u7684\u7ba1\u7406\u5de5\u5177\u7c7b\u7684\u5c01\u88c5\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a\n<\/p>\n

\r\npublic class SpringContextUtil implements ApplicationContextAware {  \r\n    \/\/ Spring\u5e94\u7528\u4e0a\u4e0b\u6587\u73af\u5883  \r\n    private static ApplicationContext applicationContext;  \r\n    \/** \r\n     * \u5b9e\u73b0ApplicationContextAware\u63a5\u53e3\u7684\u56de\u8c03\u65b9\u6cd5\uff0c\u8bbe\u7f6e\u4e0a\u4e0b\u6587\u73af\u5883 \r\n     * @param applicationContext \r\n     *\/  \r\n    public void setApplicationContext(ApplicationContext applicationContext) {  \r\n        SpringContextUtil.applicationContext = applicationContext;  \r\n    }  \r\n    \/** \r\n     * @return ApplicationContext \r\n     *\/  \r\n    public static ApplicationContext getApplicationContext() {  \r\n        return applicationContext;  \r\n    }  \r\n    \/** \r\n     * \u83b7\u53d6\u5bf9\u8c61 \r\n     *  \r\n     * @param name \r\n     * @return Object\r\n     * @throws BeansException \r\n     *\/  \r\n    public static Object getBean(String name) throws BeansException {  \r\n        return applicationContext.getBean(name);  \r\n    }  \r\n}<\/pre>\n
\n\t   \u7136\u540e\u5728spring\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u914d\u7f6e\u5373\u53ef\n<\/p>\n
\r\n<bean class="com.xttblog.SpringContextUtil" lazy-init="false" \/><\/pre>\n
\n\t2.SpringBeanAutowiringSupport<\/strong>
\n\t    \u901a\u8fc7SpringBeanAutowiringSupport\u62bd\u8c61\u7c7b\u6765\u5b9e\u73b0\u3002\u4ee3\u7801\u5982\u4e0b\uff1a\n<\/p>\n
\r\npublic class SpringWiredBean extends SpringBeanAutowiringSupport {\r\n\t\/**\r\n\t * \u81ea\u52a8\u88c5\u914d\u6ce8\u89e3\u4f1a\u8ba9Spring\u901a\u8fc7\u7c7b\u578b\u5339\u914d\u4e3abeanFactory\u6ce8\u5165\u793a\u4f8b\r\n\t *\/\r\n\t@Autowired\r\n\tprivate BeanFactory beanFactory;\r\n\tprivate SpringWiredBean() {}\r\n\tprivate static SpringWiredBean instance;\r\n\tstatic {\r\n\t\t\/\/ \u9759\u6001\u5757\uff0c\u521d\u59cb\u5316\u5b9e\u4f8b\r\n\t\tinstance = new SpringWiredBean();\r\n\t}\r\n\t\/**\r\n\t * \u5b9e\u4f8b\u65b9\u6cd5\r\n\t * \u4f7f\u7528\u7684\u65f6\u5019\u5148\u901a\u8fc7getInstance\u65b9\u6cd5\u83b7\u53d6\u5b9e\u4f8b\r\n\t * @param beanId\r\n\t * @return\r\n\t *\/\r\n\tpublic Object getBeanById(String beanId) {\r\n\t\treturn beanFactory.getBean(beanId);\r\n\t}\r\n\tpublic static SpringWiredBean getInstance() {\r\n\t\treturn instance;\r\n\t}\r\n}<\/pre>\n
\n\t    \u9700\u8981\u6ce8\u610f\u8fd9\u91cc\u4f7f\u7528\u4e86\u81ea\u52a8\u88c5\u914d\uff0c\u6240\u4ee5spring\u914d\u7f6e\u6587\u4ef6\u4e2d\u4e0d\u80fd\u5c11\u4e86\u4e0b\u9762\u7684\u914d\u7f6e\n<\/p>\n
\r\n<context:component-scan base-package="com.xttblog"><\/context:component-scan><\/pre>\n
\n\t3.BeanFactoryAware<\/strong>
\n\t    \u901a\u8fc7BeanFactoryAware\u63a5\u53e3\u6765\u5b9e\u73b0\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a\n<\/p>\n
\r\n@Service\r\npublic class SpringBeanUtils implements BeanFactoryAware {\r\n\tprivate static BeanFactory beanFactory;\r\n\t\/**\r\n\t * \u6ce8\u5165BeanFactory\u5b9e\u4f8b\r\n\t *\/\r\n\t@Override\r\n\tpublic void setBeanFactory(BeanFactory beanFactory) throws BeansException {\r\n\t\tSpringBeanUtils.beanFactory = beanFactory;\r\n\t}\r\n\t\/**\r\n\t * \u6839\u636ebean\u7684\u540d\u79f0\u83b7\u53d6\u76f8\u5e94\u7c7b\u578b\u7684\u5bf9\u8c61\r\n\t *\r\n\t * @param beanName\r\n\t *            bean\u7684\u540d\u79f0\r\n\t * @return Object\u7c7b\u578b\u7684\u5bf9\u8c61\r\n\t *\/\r\n\tpublic static Object getBean(String beanName) {\r\n\t\treturn beanFactory.getBean(beanName);\r\n\t}\r\n}<\/pre>\n
\n\t    \u8fd9\u91cc\u4e5f\u9700\u8981\u5728spring\u914d\u7f6e\u6587\u4ef6\u4e2d\u88c5\u914d\uff0c\u548c2\u4e00\u6837\uff0c\u6211\u5c31\u4e0d\u5728\u5355\u72ec\u5199\u4e86\uff01
\n\t\u4ee5\u4e0a3\u4e2d\u90fd\u53ef\u4ee5\u901a\u8fc7XXDAO xxDao =(XXDAO)SpringBeanUtils.getContext().getBean("xxDAO");<\/strong><\/span>\u7684\u5f62\u5f0f\u83b7\u53d6\u5bf9\u8c61\u3002
\n\t\u83b7\u53d6bean\u5bf9\u8c61<\/strong>
\n\t\u65b9\u6cd5\u4e00\uff1a\u5728\u624b\u52a8\u52a0\u8f7dxml\u521d\u59cb\u5316\u65f6\u83b7\u53d6ApplicationContext<\/strong><\/span>
\n\t    \u901a\u8fc7ClassPathXmlApplicationContext\u3001FileSystemXmlApplicationContext\u3001PathmatchingResourceResolver\u3001FileSystemResource\u7b49\u65b9\u5f0f\u52a0\u8f7dspring\u914d\u7f6e\u6587\u4ef6\u7684\u65b9\u5f0f\u5b9e\u73b0\n<\/p>\n
\r\nApplicationContext ac = new FileSystemXmlApplicationContext("applicationContext.xml"); \r\nac.getBean("beanId");<\/pre>\n
\n\t\u65b9\u6cd5\u4e8c\uff1a\u901a\u8fc7Spring\u63d0\u4f9b\u7684\u5de5\u5177\u7c7b\u83b7\u53d6ApplicationContext\u5bf9\u8c61<\/strong><\/span>  \n<\/p>\n
\r\nApplicationContext ac1 = WebApplicationContextUtils.getRequiredWebApplicationContext(ServletContext sc); \r\nApplicationContext ac2 = WebApplicationContextUtils.getWebApplicationContext(ServletContext sc); \r\nac1.getBean("beanId"); \r\nac2.getBean("beanId");<\/pre>\n
\n\t\u65b9\u6cd5\u4e09\uff1a\u7ee7\u627f\u81ea\u62bd\u8c61\u7c7bApplicationObjectSupport<\/span><\/strong>
\n\t    \u62bd\u8c61\u7c7bApplicationObjectSupport\u63d0\u4f9bgetApplicationContext()\u65b9\u6cd5\uff0c\u53ef\u4ee5\u65b9\u4fbf\u7684\u83b7\u53d6ApplicationContext
\n\t\u65b9\u6cd5\u56db\uff1a\u7ee7\u627f\u81ea\u62bd\u8c61\u7c7bWebApplicationObjectSupport<\/span><\/strong>
\n\t    \u8c03\u7528getWebApplicationContext()\u83b7\u53d6WebApplicationContext
\n\t\u65b9\u6cd5\u4e94\uff1a\u901a\u8fc7Spring\u63d0\u4f9b\u7684ContextLoader<\/span><\/strong>\n<\/p>\n
\r\nWebApplicationContext wac = ContextLoader.getCurrentWebApplicationContext();\r\nwac.getBean(beanID);<\/pre>\n
\n\t\u4e0b\u9762\u9644\u4e00\u5f20spring\u7684bean\u751f\u547d\u5468\u671f\u56fe\uff1a
\n\t\"bean\u751f\u547d\u5468\u671f\"
\n\t\"bean\u751f\u547d\u5468\u671f\"\n<\/p>\n
\n\t\u7248\u6743\u58f0\u660e\uff1a\u672c\u6587\u4e3a\u535a\u4e3b\u539f\u521b\u6587\u7ae0\uff0c\u672a\u7ecf\u535a\u4e3b\u5141\u8bb8\u4e0d\u5f97\u8f6c\u8f7d\u3002\u200b<\/strong><\/p>\n
\"\u4e1a\u4f59\u8349\u516c\u4f17\u53f7\"\/<\/p>
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\u672c\u6587\u539f\u6587\u51fa\u5904\uff1a\u4e1a\u4f59\u8349<\/a>\uff1a » \u8be6\u89e3\u83b7\u53d6Spring\u4e2dbean\u7684\u5de5\u5177\u7c7b\u5c01\u88c5\u548cbean\u7ba1\u7406<\/a><\/p>","protected":false},"excerpt":{"rendered":"
\u6700\u8fd1\u6709\u540c\u5b66\u5728\u4f7f\u7528Spring\u7684bean\u7ba1\u7406\u65f6\uff0c\u51fa\u73b0\u4e86\u5f88\u4e25\u91cd\u7684\u95ee\u9898\uff0c\u9879\u76ee\u5728\u6bcf\u6b21\u91cd\u542f\u65f6\uff0c\u90fd\u4f1a\u629b\u51fa\u627e\u4e0d\u5230applic […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[271,269,273,272,270],"class_list":["post-527","post","type-post","status-publish","format-standard","hentry","category-java","tag-applicationcontextaware","tag-bean","tag-getapplicationcontext","tag-springbeanautowiringsupport","tag-web-xml"],"_links":{"self":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/527","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=527"}],"version-history":[{"count":1,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/527\/revisions"}],"predecessor-version":[{"id":1997,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=\/wp\/v2\/posts\/527\/revisions\/1997"}],"wp:attachment":[{"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=527"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.xttblog.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}