{"id":94272,"date":"2026-08-14T06:48:56","date_gmt":"2026-08-13T22:48:56","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/94272.html"},"modified":"2026-08-14T06:48:56","modified_gmt":"2026-08-13T22:48:56","slug":"%e3%80%8ajava-100-%e5%a4%a9%e8%bf%9b%e9%98%b6%e4%b9%8b%e8%b7%af%e3%80%8b%e7%ac%ac73%e7%af%87%ef%bc%9aspring-ioc%e5%ae%b9%e5%99%a8%ef%bc%882026%e7%89%88%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/94272.html","title":{"rendered":"\u300aJava 100 \u5929\u8fdb\u9636\u4e4b\u8def\u300b\u7b2c73\u7bc7\uff1aSpring IoC\u5bb9\u5668\uff082026\u7248\uff09"},"content":{"rendered":"

\u7b2c73\u7bc7：Spring IoC\u5bb9\u5668（2026\u7248）<\/h3>\n

📌 \u7cfb\u5217\u5bfc\u822a：\u300aJava 100 \u5929\u8fdb\u9636\u4e4b\u8def\u300b\u5b8c\u6574\u76ee\u5f55 | \u2b05\ufe0f \u4e0a\u4e00\u7bc7：\u7b2c72\u7bc7：JavaWeb\u9762\u8bd5\u9ad8\u9891\u9898 | \u27a1\ufe0f \u4e0b\u4e00\u7bc7：\u7b2c74\u7bc7：Bean\u751f\u547d\u5468\u671f（\u5f85\u53d1\u5e03）<\/p>\n

🗺\ufe0f \u672c\u6587\u9605\u8bfb\u5730\u56fe（3 \u5206\u949f\u901f\u89c8）<\/h4>\n

\u7b2c72\u7bc7\u5b8c\u6210\u4e86JavaWeb\u4e13\u9898\u7684\u6536\u5b98，\u672c\u7bc7\u6b63\u5f0f\u5f00\u542f Spring\u5168\u5bb6\u6876\u4e13\u9898\u3002Spring\u662fJava\u540e\u7aef\u5f00\u53d1\u7684\u4e8b\u5b9e\u6807\u51c6，\u800cIoC\u5bb9\u5668\u662fSpring\u6700\u6838\u5fc3\u7684\u57fa\u77f3\u2014\u2014\u7406\u89e3\u4e86IoC\u5bb9\u5668，\u5c31\u7406\u89e3\u4e86Spring\u7684"\u5fc3\u810f"：<\/p>\n\n\u6a21\u5757\u6838\u5fc3\u95ee\u9898\u4e00\u53e5\u8bdd\u56de\u7b54<\/tr>\n\n\n\n\n\n\n\n\n
IoC\u662f\u4ec0\u4e48<\/td>\n\u63a7\u5236\u53cd\u8f6c\u5230\u5e95\u53cd\u8f6c\u4e86\u4ec0\u4e48？<\/td>\n\u5bf9\u8c61\u7684\u521b\u5efa\u6743\u4ece"\u81ea\u5df1new"\u53cd\u8f6c\u7ed9"\u5bb9\u5668\u7ba1\u7406"<\/td>\n<\/tr>\n
DI\u662f\u4ec0\u4e48<\/td>\n\u4f9d\u8d56\u6ce8\u5165\u548cIoC\u4ec0\u4e48\u5173\u7cfb？<\/td>\nDI\u662fIoC\u7684\u5177\u4f53\u5b9e\u73b0\u65b9\u5f0f\u2014\u2014\u5bb9\u5668\u628a\u4f9d\u8d56"\u6ce8\u5165"\u7ed9\u5bf9\u8c61<\/td>\n<\/tr>\n
BeanFactory vs ApplicationContext<\/td>\n\u4e24\u4e2a\u5bb9\u5668\u6709\u4ec0\u4e48\u533a\u522b？<\/td>\nBeanFactory\u662f"\u57fa\u7840\u6b3e"（\u61d2\u52a0\u8f7d），ApplicationContext\u662f"\u65d7\u8230\u6b3e"（\u9884\u52a0\u8f7d+\u4f01\u4e1a\u7ea7\u529f\u80fd）<\/td>\n<\/tr>\n
Bean\u662f\u4ec0\u4e48<\/td>\nSpring\u91cc\u7684Bean\u5230\u5e95\u662f\u4ec0\u4e48？<\/td>\n\u88abSpring IoC\u5bb9\u5668\u7ba1\u7406\u7684Java\u5bf9\u8c61<\/td>\n<\/tr>\n
Bean\u751f\u547d\u5468\u671f<\/td>\nBean\u4ece\u751f\u5230\u6b7b\u7ecf\u5386\u4ec0\u4e48？<\/td>\n\u5b9e\u4f8b\u5316\u2192\u5c5e\u6027\u586b\u5145\u2192\u521d\u59cb\u5316\u2192\u4f7f\u7528\u2192\u9500\u6bc1<\/td>\n<\/tr>\n
\u4e09\u79cd\u914d\u7f6e\u65b9\u5f0f<\/td>\n\u600e\u4e48\u544a\u8bc9Spring\u8981\u7ba1\u7406\u54ea\u4e9b\u5bf9\u8c61？<\/td>\nXML\u914d\u7f6e\u3001\u6ce8\u89e3\u914d\u7f6e\u3001Java\u914d\u7f6e（@Configuration + @Bean）<\/td>\n<\/tr>\n
\u9762\u8bd5\u6700\u7231\u95ee<\/td>\n\u9ad8\u9891\u8003\u70b9\u6709\u54ea\u4e9b？<\/td>\n\u89c1\u6587\u672b 🎤 \u5c0f\u8282<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

\u4e00\u3001\u6838\u5fc3\u77e5\u8bc6\u70b9<\/h4>\n

1. IoC\u662f\u4ec0\u4e48？<\/p>\n

IoC（Inversion of Control，\u63a7\u5236\u53cd\u8f6c）\u662f\u4e00\u79cd\u8bbe\u8ba1\u539f\u5219，\u7528\u4e8e\u51cf\u5c11\u4ee3\u7801\u95f4\u7684\u76f4\u63a5\u4f9d\u8d56\u5173\u7cfb\u3002\u5176\u6838\u5fc3\u601d\u60f3\u662f：\u5c06\u5bf9\u8c61\u7684\u521b\u5efa\u3001\u4f9d\u8d56\u7ba1\u7406\u7b49\u63a7\u5236\u6743\u4ece\u4e1a\u52a1\u4ee3\u7801\u8f6c\u79fb\u5230\u5916\u90e8\u5bb9\u5668\u3002<\/p>\n

💡 \u901a\u4fd7\u7406\u89e3：\u4f20\u7edf\u7f16\u7a0b\u4e2d，\u8c03\u7528\u8005\u4e3b\u52a8\u521b\u5efa\u548c\u7ba1\u7406\u88ab\u8c03\u7528\u8005\u7684\u751f\u547d\u5468\u671f\u2014\u2014\u4f60\u9700\u8981\u4ec0\u4e48，\u81ea\u5df1new\u4e00\u4e2a\u3002IoC\u6a21\u5f0f\u4e0b，\u4f60\u53ea\u9700\u8981\u58f0\u660e"\u6211\u9700\u8981\u4ec0\u4e48"，\u5bb9\u5668\u4f1a\u5e2e\u4f60\u521b\u5efa\u597d\u5e76"\u6ce8\u5165"\u8fdb\u6765\u3002<\/p>\n

2. DI\u662f\u4ec0\u4e48？<\/p>\n

DI（Dependency Injection，\u4f9d\u8d56\u6ce8\u5165）\u662fIoC\u7684\u5177\u4f53\u5b9e\u73b0\u65b9\u5f0f\u3002\u5bf9\u8c61\u53ea\u901a\u8fc7\u6784\u9020\u51fd\u6570\u53c2\u6570\u3001\u5de5\u5382\u65b9\u6cd5\u53c2\u6570\u6216\u5c5e\u6027\u6765\u5b9a\u4e49\u5b83\u4eec\u7684\u4f9d\u8d56\u9879，\u5bb9\u5668\u5728\u521b\u5efaBean\u65f6\u6ce8\u5165\u8fd9\u4e9b\u4f9d\u8d56\u3002<\/p>\n

💡 \u6838\u5fc3\u5173\u7cfb：IoC\u662f\u4e00\u79cd\u601d\u60f3，DI\u662f\u5b9e\u73b0\u8fd9\u79cd\u601d\u60f3\u7684\u6280\u672f\u624b\u6bb5\u3002<\/p>\n

3. IoC\u89e3\u51b3\u4e86\u4ec0\u4e48\u95ee\u9898？<\/p>\n\n\u95ee\u9898\u4f20\u7edf\u65b9\u5f0fIoC\u65b9\u5f0f<\/tr>\n\n\n\n\n
\u8026\u5408\u5ea6\u9ad8<\/td>\n\u7c7b\u5185\u90e8\u76f4\u63a5new\u4f9d\u8d56\u5bf9\u8c61，\u6362\u5b9e\u73b0\u8981\u6539\u4ee3\u7801<\/td>\n\u4f9d\u8d56\u901a\u8fc7\u6784\u9020\u51fd\u6570\/Setter\u4f20\u5165，\u6362\u5b9e\u73b0\u4e0d\u6539\u4ee3\u7801<\/td>\n<\/tr>\n
\u96be\u4ee5\u6d4b\u8bd5<\/td>\n\u4f9d\u8d56\u786c\u7f16\u7801，\u65e0\u6cd5Mock<\/td>\n\u4f9d\u8d56\u53ef\u66ff\u6362，\u5355\u5143\u6d4b\u8bd5\u5bb9\u6613<\/td>\n<\/tr>\n
\u96be\u4ee5\u6269\u5c55<\/td>\n\u65b0\u589e\u529f\u80fd\u8981\u6539\u5df2\u6709\u4ee3\u7801<\/td>\n\u901a\u8fc7\u914d\u7f6e\/\u6ce8\u89e3\u6269\u5c55，\u7b26\u5408\u5f00\u95ed\u539f\u5219<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

4. IoC\u7684\u4e09\u5927\u4f18\u52bf<\/p>\n\n\u4f18\u52bf\u8bf4\u660e<\/tr>\n\n\n\n\n
\u89e3\u8026\u6027<\/td>\n\u5bf9\u8c61\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb\u901a\u8fc7\u5bb9\u5668\u914d\u7f6e\u800c\u975e\u786c\u7f16\u7801\u5b9e\u73b0<\/td>\n<\/tr>\n
\u53ef\u6d4b\u8bd5\u6027<\/td>\n\u4f9d\u8d56\u6ce8\u5165\u4f7f\u5f97\u5355\u5143\u6d4b\u8bd5\u53ef\u4ee5\u901a\u8fc7Mock\u5bf9\u8c61\u8f7b\u677e\u5b8c\u6210<\/td>\n<\/tr>\n
\u53ef\u914d\u7f6e\u6027<\/td>\nBean\u7684\u521b\u5efa\u548c\u88c5\u914d\u8fc7\u7a0b\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e\u6587\u4ef6\u6216\u6ce8\u89e3\u7075\u6d3b\u8c03\u6574<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e8c\u3001\u901a\u4fd7\u8bb2\u89e3（1\u5206\u949f\u5f00\u5fc3\u5b66）<\/h4>\n

\u628aIoC\u5bb9\u5668\u60f3\u8c61\u6210"\u667a\u80fd\u5de5\u5382 + \u914d\u9001\u4e2d\u5fc3"<\/p>\n

\u672c\u7cfb\u5217\u7b2c68\u7bc7\u8bb2\u8fc7，Servlet\u5bb9\u5668（Tomcat）\u662f"\u540e\u53a8"\u3002Spring IoC\u5bb9\u5668\u6bd4\u5b83\u66f4\u8fdb\u4e86\u4e00\u6b65\u2014\u2014\u5b83\u4e0d\u53ea\u662f"\u540e\u53a8"，\u800c\u662f\u6574\u6761\u4f9b\u5e94\u94fe\u7684\u667a\u80fd\u7ba1\u7406\u4e2d\u5fc3\u3002<\/p>\n

    \n
  • \u4f20\u7edf\u65b9\u5f0f（\u81ea\u5df1new） ：\u4f60\u60f3\u505a\u4e00\u9053\u83dc，\u5f97\u81ea\u5df1\u79cd\u83dc\u3001\u81ea\u5df1\u517b\u732a\u3001\u81ea\u5df1\u78e8\u8c03\u6599\u2014\u2014\u6240\u6709\u4f9d\u8d56\u90fd\u5f97\u81ea\u5df1\u641e\u5b9a\u3002<\/li>\n
  • IoC\u65b9\u5f0f（\u5bb9\u5668\u7ba1\u7406） ：\u4f60\u53ea\u9700\u8981\u544a\u8bc9\u5de5\u5382"\u6211\u8981\u505a\u5bab\u4fdd\u9e21\u4e01"，\u5de5\u5382\u81ea\u52a8\u628a\u9e21\u8089\u3001\u82b1\u751f\u3001\u5e72\u8fa3\u6912\u914d\u9f50\u9001\u5230\u4f60\u624b\u4e0a\u2014\u2014\u4f60\u53ea\u7ba1\u7092\u83dc\u3002<\/li>\n<\/ul>\n

    \u4e24\u4e2a\u5bb9\u5668\u7684\u6bd4\u55bb：<\/p>\n

      \n
    • BeanFactory：\u5c0f\u533a\u697c\u4e0b\u7684\u81ea\u52a8\u552e\u8d27\u673a\u2014\u2014\u4f60\u8981\u4ec0\u4e48，\u6295\u5e01\u624d\u51fa\u8d27（\u61d2\u52a0\u8f7d），\u529f\u80fd\u5355\u4e00\u3002<\/li>\n
    • ApplicationContext：\u5927\u578b\u4ed3\u50a8\u8d85\u5e02\u2014\u2014\u4e00\u5f00\u95e8\u5c31\u628a\u6240\u6709\u8d27\u54c1\u90fd\u6446\u597d（\u9884\u52a0\u8f7d），\u8fd8\u63d0\u4f9b\u63a8\u8f66\u3001\u5bfc\u8d2d\u3001\u9000\u6362\u8d27\u7b49\u5168\u5957\u670d\u52a1（\u4e8b\u4ef6\u3001\u56fd\u9645\u5316\u3001AOP\u7b49）\u3002<\/li>\n<\/ul>\n

      \u4e09\u3001Spring IoC\u5bb9\u5668\u4f53\u7cfb<\/h4>\n

      3.1 \u5bb9\u5668\u5c42\u7ea7\u5173\u7cfb<\/h5>\n

      Spring\u7684IoC\u5bb9\u5668\u4ee5 BeanFactory \u4e3a\u9876\u5c42\u63a5\u53e3，ApplicationContext \u662f\u5176\u5b50\u63a5\u53e3：<\/p>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      org.springframework.beans \u548c org.springframework.context \u5305\u662fSpring Framework IoC\u5bb9\u5668\u7684\u57fa\u7840\u3002<\/p>\n

      3.2 BeanFactory vs ApplicationContext<\/h5>\n

      \u8fd9\u662fSpring\u9762\u8bd5100%\u4f1a\u95ee\u7684\u5bf9\u6bd4\u9898\u3002<\/p>\n\n\u5bf9\u6bd4\u7ef4\u5ea6BeanFactoryApplicationContext<\/tr>\n\n\n\n\n\n\n
      \u5b98\u65b9\u5b9a\u4f4d<\/td>\n\u6700\u57fa\u7840\u7684IoC\u5bb9\u5668\u63a5\u53e3，\u5b9a\u4e49Bean\u7ba1\u7406\u7684\u6838\u5fc3\u89c4\u8303<\/td>\nBeanFactory\u7684\u5b50\u63a5\u53e3，\u589e\u52a0\u4e86\u4f01\u4e1a\u7ea7\u529f\u80fd<\/td>\n<\/tr>\n
      \u52a0\u8f7d\u7b56\u7565<\/td>\n\u61d2\u52a0\u8f7d\u2014\u2014\u8c03\u7528getBean()\u65f6\u624d\u521b\u5efa\u5b9e\u4f8b<\/td>\n\u9884\u52a0\u8f7d\u2014\u2014\u542f\u52a8\u65f6\u4e00\u6b21\u6027\u521b\u5efa\u6240\u6709\u5355\u4f8bBean<\/td>\n<\/tr>\n
      \u6838\u5fc3\u529f\u80fd<\/td>\n\u53ea\u63d0\u4f9bgetBean()\u7b49\u57fa\u7840\u529f\u80fd<\/td>\n\u7ee7\u627fBeanFactory\u5168\u90e8\u529f\u80fd + 10\u5927\u6269\u5c55\u529f\u80fd<\/td>\n<\/tr>\n
      \u5b9e\u9645\u4f7f\u7528<\/td>\n\u51e0\u4e4e\u89c1\u4e0d\u5230<\/td>\n\u6bcf\u5929\u90fd\u7528\u2014\u2014SpringApplication.run(…)\u8fd4\u56de\u7684\u5c31\u662f\u5b83<\/td>\n<\/tr>\n
      \u5e38\u7528\u5b9e\u73b0<\/td>\nDefaultListableBeanFactory<\/td>\nAnnotationConfigApplicationContext\u3001ClassPathXmlApplicationContext<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      ApplicationContext\u6bd4BeanFactory\u591a\u51fa\u7684\u6838\u5fc3\u529f\u80fd：<\/p>\n\n\u529f\u80fd\u8bf4\u660e<\/tr>\n\n\n\n\n\n\n\n
      \u4e8b\u4ef6\u53d1\u5e03\u4e0e\u76d1\u542c<\/td>\nApplicationEvent + @EventListener<\/td>\n<\/tr>\n
      \u56fd\u9645\u5316（i18n）<\/td>\nMessageSource\u652f\u6301\u591a\u8bed\u8a00<\/td>\n<\/tr>\n
      \u8d44\u6e90\u52a0\u8f7d<\/td>\nResourceLoader\u652f\u6301classpath:\u3001file:\u7b49<\/td>\n<\/tr>\n
      \u73af\u5883\u62bd\u8c61<\/td>\nEnvironment + @Profile\u652f\u6301\u591a\u73af\u5883\u914d\u7f6e<\/td>\n<\/tr>\n
      AOP\u81ea\u52a8\u4ee3\u7406<\/td>\n\u81ea\u52a8\u8bc6\u522b@Aspect\u5e76\u7ec7\u5165，@Transactional\u76f4\u63a5\u751f\u6548<\/td>\n<\/tr>\n
      Web\u5e94\u7528\u652f\u6301<\/td>\nWebApplicationContext<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      💡 \u8bb0\u5fc6\u53e3\u8bc0：BeanFactory\u662f"\u57fa\u7840\u6b3e"（\u591f\u7528\u4f46\u7b80\u964b），ApplicationContext\u662f"\u65d7\u8230\u6b3e"（\u529f\u80fd\u5168\u3001\u4f53\u9a8c\u597d） \u3002\u5b9e\u9645\u9879\u76ee100%\u7528ApplicationContext\u3002<\/p>\n

      3.3 Bean\u662f\u4ec0\u4e48？<\/h5>\n

      \u5728Spring\u4e2d，\u6784\u6210\u5e94\u7528\u7a0b\u5e8f\u9aa8\u67b6\u5e76\u7531Spring IoC\u5bb9\u5668\u7ba1\u7406\u7684\u5bf9\u8c61\u79f0\u4e3aBean\u3002Bean\u662f\u7531Spring IoC\u5bb9\u5668\u5b9e\u4f8b\u5316\u3001\u7ec4\u88c5\u548c\u7ba1\u7406\u7684\u5bf9\u8c61\u3002<\/p>\n

      💡 \u672c\u8d28：Bean\u5c31\u662f\u4e00\u4e2a\u666e\u901a\u7684Java\u5bf9\u8c61，\u552f\u4e00\u7279\u6b8a\u4e4b\u5904\u5728\u4e8e\u2014\u2014\u5b83\u7531Spring\u5bb9\u5668\u7ba1\u7406，\u800c\u4e0d\u662f\u4f60\u81ea\u5df1new\u51fa\u6765\u7684\u3002<\/p>\n

      \u56db\u3001Bean\u751f\u547d\u5468\u671f（5\u9636\u6bb5）<\/h4>\n

      Bean\u7684\u751f\u547d\u5468\u671f\u662fSpring\u9762\u8bd5\u7684\u5fc5\u8003\u9879，\u9700\u8981\u638c\u63e1\u4ee5\u4e0b\u6838\u5fc3\u9636\u6bb5：<\/p>\n

      \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

      \u521d\u59cb\u5316\u9636\u6bb5\u8be6\u89e3（\u8fd9\u662f\u751f\u547d\u5468\u671f\u4e2d\u6700\u590d\u6742\u7684\u9636\u6bb5）：<\/p>\n\n\u6b65\u9aa4\u8bf4\u660e<\/tr>\n\n\n\n\n\n\n
      \u2460 Aware\u63a5\u53e3\u56de\u8c03<\/td>\nBeanNameAware\u3001BeanFactoryAware\u7b49<\/td>\n<\/tr>\n
      \u2461 BeanPostProcessor\u524d\u7f6e\u5904\u7406<\/td>\n\u521d\u59cb\u5316\u524d\u7684\u62e6\u622a<\/td>\n<\/tr>\n
      \u2462 InitializingBean.afterPropertiesSet()<\/td>\n\u63a5\u53e3\u65b9\u5f0f\u521d\u59cb\u5316<\/td>\n<\/tr>\n
      \u2463 \u81ea\u5b9a\u4e49init-method<\/td>\nXML\u6216\u6ce8\u89e3\u6307\u5b9a\u7684\u521d\u59cb\u5316\u65b9\u6cd5<\/td>\n<\/tr>\n
      \u2464 BeanPostProcessor\u540e\u7f6e\u5904\u7406<\/td>\n\u521d\u59cb\u5316\u540e\u7684\u62e6\u622a，AOP\u4ee3\u7406\u5728\u6b64\u5b8c\u6210<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u4e94\u3001\u4e09\u79cdBean\u914d\u7f6e\u65b9\u5f0f<\/h4>\n

      \u5bb9\u5668\u901a\u8fc7\u8bfb\u53d6\u914d\u7f6e\u5143\u6570\u636e\u6765\u83b7\u53d6\u6307\u4ee4\u2014\u2014\u544a\u8bc9\u5b83\u8981\u5b9e\u4f8b\u5316\u54ea\u4e9b\u5bf9\u8c61\u3001\u5982\u4f55\u88c5\u914d\u5b83\u4eec\u3002\u914d\u7f6e\u5143\u6570\u636e\u53ef\u4ee5\u7528\u4e09\u79cd\u65b9\u5f0f\u8868\u8fbe：<\/p>\n

      5.1 XML\u914d\u7f6e（\u4f20\u7edf\u65b9\u5f0f）<\/h5>\n

      <!– applicationContext.xml –><\/span>
      \n<<\/span>beans<\/span>><\/span><\/span>
      \n <<\/span>bean<\/span> id<\/span>=<\/span>"<\/span>userService"<\/span><\/span> class<\/span>=<\/span>"<\/span>com.example.UserServiceImpl"<\/span><\/span>><\/span><\/span>
      \n <<\/span>property<\/span> name<\/span>=<\/span>"<\/span>userDao"<\/span><\/span> ref<\/span>=<\/span>"<\/span>userDao"<\/span><\/span>\/><\/span><\/span>
      \n <\/<\/span>bean<\/span>><\/span><\/span>
      \n <<\/span>bean<\/span> id<\/span>=<\/span>"<\/span>userDao"<\/span><\/span> class<\/span>=<\/span>"<\/span>com.example.UserDaoImpl"<\/span><\/span>\/><\/span><\/span>
      \n<\/<\/span>beans<\/span>><\/span><\/span><\/p>\n

      \/\/ \u52a0\u8f7dXML\u914d\u7f6e<\/span>
      \nApplicationContext<\/span> ctx =<\/span> new<\/span> ClassPathXmlApplicationContext<\/span>(<\/span>"applicationContext.xml"<\/span>)<\/span>;<\/span>
      \nUserService<\/span> service =<\/span> ctx.<\/span>getBean<\/span>(<\/span>"userService"<\/span>,<\/span> UserService<\/span>.<\/span>class<\/span>)<\/span>;<\/span><\/p>\n

      5.2 \u6ce8\u89e3\u914d\u7f6e（\u4e3b\u6d41\u65b9\u5f0f）<\/h5>\n

      @Service<\/span> \/\/ \u58f0\u660e\u4e3a\u4e1a\u52a1\u5c42Bean<\/span>
      \npublic<\/span> class<\/span> UserServiceImpl<\/span> implements<\/span> UserService<\/span> {<\/span>
      \n @Autowired<\/span> \/\/ \u81ea\u52a8\u6ce8\u5165\u4f9d\u8d56<\/span>
      \n private<\/span> UserDao<\/span> userDao;<\/span>
      \n}<\/span><\/p>\n

      @Repository<\/span> \/\/ \u58f0\u660e\u4e3a\u6570\u636e\u8bbf\u95ee\u5c42Bean<\/span>
      \npublic<\/span> class<\/span> UserDaoImpl<\/span> implements<\/span> UserDao<\/span> {<\/span>
      \n \/\/ \u6570\u636e\u8bbf\u95ee\u903b\u8f91<\/span>
      \n}<\/span><\/p>\n

      \/\/ \u542f\u52a8\u5bb9\u5668（Spring Boot\u81ea\u52a8\u5b8c\u6210）<\/span>
      \nApplicationContext<\/span> ctx =<\/span> new<\/span> AnnotationConfigApplicationContext<\/span>(<\/span>"com.example"<\/span>)<\/span>;<\/span><\/p>\n

      💡 \u6ce8\u89e3\u542b\u4e49：@Component \u662f\u901a\u7528\u6ce8\u89e3，@Service\u3001@Repository\u3001@Controller \u662f\u5176\u7279\u5316\u7248\u672c，\u5206\u522b\u7528\u4e8e\u4e1a\u52a1\u5c42\u3001\u6570\u636e\u5c42\u548c\u63a7\u5236\u5c42\u3002<\/p>\n

      5.3 Java\u914d\u7f6e（@Configuration + @Bean）<\/h5>\n

      @Configuration<\/span> \/\/ \u58f0\u660e\u8fd9\u662f\u4e00\u4e2a\u914d\u7f6e\u7c7b<\/span>
      \npublic<\/span> class<\/span> AppConfig<\/span> {<\/span><\/p>\n

      @Bean<\/span> \/\/ \u65b9\u6cd5\u8fd4\u56de\u503c\u4f1a\u88ab\u6ce8\u518c\u4e3aSpring\u5bb9\u5668\u4e2d\u7684Bean<\/span>
      \n public<\/span> UserService<\/span> userService<\/span>(<\/span>UserDao<\/span> userDao)<\/span> {<\/span>
      \n return<\/span> new<\/span> UserServiceImpl<\/span>(<\/span>userDao)<\/span>;<\/span>
      \n }<\/span><\/p>\n

      @Bean<\/span>
      \n public<\/span> UserDao<\/span> userDao<\/span>(<\/span>)<\/span> {<\/span>
      \n return<\/span> new<\/span> UserDaoImpl<\/span>(<\/span>)<\/span>;<\/span>
      \n }<\/span>
      \n}<\/span><\/p>\n

      \/\/ \u52a0\u8f7dJava\u914d\u7f6e<\/span>
      \nApplicationContext<\/span> ctx =<\/span> new<\/span> AnnotationConfigApplicationContext<\/span>(<\/span>AppConfig<\/span>.<\/span>class<\/span>)<\/span>;<\/span><\/p>\n

      💡 @Configuration\u539f\u7406：\u914d\u7f6e\u7c7b\u4f1a\u7ecf\u8fc7ConfigurationClassPostProcessor（\u540e\u7f6e\u5904\u7406\u5668）\u5904\u7406，\u89e3\u6790\u6240\u6709@Bean\u65b9\u6cd5\u5e76\u8f6c\u6362\u4e3aBean\u5b9a\u4e49\u3002@Configuration\u7c7b\u672c\u8eab\u4e5f\u4f1a\u88ab\u6ce8\u518c\u4e3a\u5bb9\u5668\u4e2d\u7684\u4e00\u4e2aBean\u3002<\/p>\n

      \u516d\u3001\u907f\u5751\u8981\u70b9<\/h4>\n\n\u9519\u8bef\/\u8bef\u533a\u540e\u679c\u6b63\u786e\u505a\u6cd5<\/tr>\n\n\n\n\n\n\n
      \u6df7\u6dc6IoC\u548cDI\u7684\u6982\u5ff5<\/td>\n\u9762\u8bd5\u7b54\u975e\u6240\u95ee<\/td>\nIoC\u662f\u601d\u60f3，DI\u662f\u5b9e\u73b0\u65b9\u5f0f<\/td>\n<\/tr>\n
      \u8ba4\u4e3anew\u51fa\u6765\u7684\u5bf9\u8c61\u4e5f\u662fBean<\/td>\n\u5bb9\u5668\u65e0\u6cd5\u7ba1\u7406，\u4f9d\u8d56\u6ce8\u5165\u5931\u6548<\/td>\n\u53ea\u6709\u5bb9\u5668\u521b\u5efa\u548c\u7ba1\u7406\u7684\u5bf9\u8c61\u624d\u662fBean<\/td>\n<\/tr>\n
      \u8bef\u4ee5\u4e3a\u9879\u76ee\u7528\u7684\u662fBeanFactory<\/td>\n\u5bf9\u5bb9\u5668\u80fd\u529b\u7406\u89e3\u6709\u504f\u5dee<\/td>\n\u5b9e\u9645\u9879\u76ee100%\u7528ApplicationContext<\/td>\n<\/tr>\n
      \u4e0d\u77e5\u9053@Configuration\u548c@Component\u7684\u533a\u522b<\/td>\n\u914d\u7f6e\u7c7b\u88ab\u4ee3\u7406，\u884c\u4e3a\u5f02\u5e38<\/td>\n@Configuration\u662f\u914d\u7f6e\u7c7b（Full\u6a21\u5f0f），@Component\u662f\u666e\u901a\u7ec4\u4ef6<\/td>\n<\/tr>\n
      \u5728Bean\u7684\u6784\u9020\u51fd\u6570\u4e2d\u505a\u8017\u65f6\u64cd\u4f5c<\/td>\n\u5bb9\u5668\u542f\u52a8\u53d8\u6162<\/td>\n\u8017\u65f6\u64cd\u4f5c\u653e\u5230@PostConstruct\u6216afterPropertiesSet\u4e2d<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      \u4e03\u3001\u9762\u8bd5\u9ad8\u9891\u8003\u70b9<\/h4>\n

      Q1：IoC\u548cDI\u662f\u4ec0\u4e48\u5173\u7cfb？<\/p>\n

      IoC（\u63a7\u5236\u53cd\u8f6c）\u662f\u4e00\u79cd\u8bbe\u8ba1\u601d\u60f3\u2014\u2014\u5c06\u5bf9\u8c61\u7684\u521b\u5efa\u548c\u4f9d\u8d56\u7ba1\u7406\u7684\u63a7\u5236\u6743\u4ece\u4ee3\u7801\u8f6c\u79fb\u5230\u5bb9\u5668\u3002DI（\u4f9d\u8d56\u6ce8\u5165）\u662fIoC\u7684\u5177\u4f53\u5b9e\u73b0\u65b9\u5f0f\u2014\u2014\u5bf9\u8c61\u901a\u8fc7\u6784\u9020\u51fd\u6570\u53c2\u6570\u3001\u5de5\u5382\u65b9\u6cd5\u53c2\u6570\u6216\u5c5e\u6027\u6765\u5b9a\u4e49\u4f9d\u8d56，\u5bb9\u5668\u5728\u521b\u5efaBean\u65f6\u6ce8\u5165\u8fd9\u4e9b\u4f9d\u8d56\u3002IoC\u662f"\u7406\u5ff5"，DI\u662f"\u505a\u6cd5" \u3002<\/p>\n

      Q2：BeanFactory\u548cApplicationContext\u7684\u533a\u522b？<\/p>\n

      BeanFactory\u662fSpring\u6700\u57fa\u7840\u7684IoC\u5bb9\u5668\u63a5\u53e3，\u91c7\u7528\u61d2\u52a0\u8f7d\u7b56\u7565，\u53ea\u63d0\u4f9bgetBean()\u7b49\u57fa\u7840\u529f\u80fd\u3002ApplicationContext\u662fBeanFactory\u7684\u5b50\u63a5\u53e3，\u91c7\u7528\u9884\u52a0\u8f7d\u7b56\u7565\u2014\u2014\u542f\u52a8\u65f6\u4e00\u6b21\u6027\u521b\u5efa\u6240\u6709\u5355\u4f8bBean，\u8fd8\u989d\u5916\u63d0\u4f9b\u4e86\u4e8b\u4ef6\u53d1\u5e03\u3001\u56fd\u9645\u5316\u3001\u8d44\u6e90\u52a0\u8f7d\u3001AOP\u96c6\u6210\u7b49\u4f01\u4e1a\u7ea7\u529f\u80fd\u3002\u5b9e\u9645\u9879\u76ee100%\u7528ApplicationContext\u3002<\/p>\n

      Q3：Spring Bean\u7684\u751f\u547d\u5468\u671f\u6709\u54ea\u4e9b\u9636\u6bb5？<\/p>\n

      \u4e94\u4e2a\u9636\u6bb5：\u2460\u5b9e\u4f8b\u5316\u2014\u2014\u5bb9\u5668\u901a\u8fc7\u53cd\u5c04\u8c03\u7528\u6784\u9020\u51fd\u6570\u521b\u5efa\u5b9e\u4f8b；\u2461\u5c5e\u6027\u586b\u5145\u2014\u2014\u901a\u8fc7\u4f9d\u8d56\u6ce8\u5165\u8bbe\u7f6e\u5c5e\u6027\u503c；\u2462\u521d\u59cb\u5316\u2014\u2014\u6267\u884cAware\u56de\u8c03\u3001BeanPostProcessor\u524d\u7f6e\u5904\u7406\u3001afterPropertiesSet\u3001\u81ea\u5b9a\u4e49init-method\u3001BeanPostProcessor\u540e\u7f6e\u5904\u7406；\u2463\u4f7f\u7528\u2014\u2014Bean\u88ab\u5e94\u7528\u7a0b\u5e8f\u8c03\u7528；\u2464\u9500\u6bc1\u2014\u2014\u5bb9\u5668\u5173\u95ed\u65f6\u6309\u76f8\u53cd\u987a\u5e8f\u89e6\u53d1\u9500\u6bc1\u903b\u8f91\u3002<\/p>\n

      Q4：@Configuration\u548c@Bean\u7684\u4f5c\u7528\u662f\u4ec0\u4e48？<\/p>\n

      @Configuration\u6807\u8bb0\u5728\u7c7b\u4e0a，\u58f0\u660e\u8fd9\u662f\u4e00\u4e2a\u914d\u7f6e\u7c7b，\u76f8\u5f53\u4e8eXML\u914d\u7f6e\u6587\u4ef6\u3002@Bean\u6807\u8bb0\u5728\u914d\u7f6e\u7c7b\u7684\u65b9\u6cd5\u4e0a，\u6307\u793a\u8be5\u65b9\u6cd5\u8fd4\u56de\u7684\u5bf9\u8c61\u5e94\u8be5\u88ab\u6ce8\u518c\u4e3aSpring\u5bb9\u5668\u4e2d\u7684Bean\u3002\u914d\u7f6e\u7c7b\u4f1a\u7ecf\u8fc7ConfigurationClassPostProcessor\u5904\u7406，\u5c06@Bean\u65b9\u6cd5\u8f6c\u6362\u4e3aBean\u5b9a\u4e49\u3002<\/p>\n

      Q5：Spring\u652f\u6301\u54ea\u51e0\u79cdBean\u914d\u7f6e\u65b9\u5f0f？<\/p>\n

      \u4e09\u79cd：\u2460XML\u914d\u7f6e\u2014\u2014\u4f20\u7edf\u7684<bean>\u6807\u7b7e\u65b9\u5f0f；\u2461\u6ce8\u89e3\u914d\u7f6e\u2014\u2014\u901a\u8fc7@Component\u3001@Service\u3001@Autowired\u7b49\u6ce8\u89e3；\u2462Java\u914d\u7f6e\u2014\u2014\u901a\u8fc7@Configuration + @Bean\u3002\u73b0\u4ee3Spring Boot\u9879\u76ee\u4ee5\u6ce8\u89e3\u914d\u7f6e\u548cJava\u914d\u7f6e\u4e3a\u4e3b\u3002<\/p>\n

      🎤 \u9762\u8bd5\u5b98\u8ffd\u95ee\u9677\u9631（\u52a0\u5206\u9898）<\/h4>\n

      \u8ffd\u95ee1：\u201c@Configuration\u6807\u6ce8\u7684\u7c7b\u548c@Component\u6807\u6ce8\u7684\u7c7b\u6709\u4ec0\u4e48\u533a\u522b？\u201d<\/p>\n

      👉 @Configuration\u7c7b\u4f1a\u88abSpring\u52a8\u6001\u4ee3\u7406，\u4fdd\u8bc1\u5176\u4e2d@Bean\u65b9\u6cd5\u8c03\u7528\u65f6\u8fd4\u56de\u7684\u662f\u5bb9\u5668\u4e2d\u5df2\u5b58\u5728\u7684Bean\u5b9e\u4f8b（\u4fdd\u8bc1\u5355\u4f8b）\u3002\u800c@Component\u6807\u6ce8\u7684\u666e\u901a\u7c7b\u4e0d\u4f1a\u88ab\u4ee3\u7406\u3002\u7b80\u5355\u8bf4：@Configuration\u662f"Full\u6a21\u5f0f"（Bean\u4e4b\u95f4\u8c03\u7528\u8d70\u4ee3\u7406），@Component\u662f"Lite\u6a21\u5f0f"（\u4e0d\u8d70\u4ee3\u7406） \u3002<\/p>\n

      \u8ffd\u95ee2：\u201cApplicationContext\u542f\u52a8\u65f6\u505a\u4e86\u4ec0\u4e48\u4e8b？\u80fd\u7b80\u5355\u8bf4\u4e0b\u6d41\u7a0b\u5417？\u201d<\/p>\n

      👉 \u6838\u5fc3\u662frefresh()\u65b9\u6cd5\u3002\u4e3b\u8981\u6b65\u9aa4：\u2460\u521b\u5efa\u5e76\u51c6\u5907BeanFactory；\u2461\u8bfb\u53d6\u914d\u7f6e\u5143\u6570\u636e（XML\/\u6ce8\u89e3\/Java\u914d\u7f6e），\u751f\u6210BeanDefinition；\u2462\u6ce8\u518cBeanPostProcessor；\u2463\u521d\u59cb\u5316\u6240\u6709\u975e\u61d2\u52a0\u8f7d\u7684\u5355\u4f8bBean；\u2464\u53d1\u5e03\u4e0a\u4e0b\u6587\u5c31\u7eea\u4e8b\u4ef6\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48ApplicationContext\u542f\u52a8\u6bd4BeanFactory\u6162\u2014\u2014\u5b83\u628a\u6d3b\u90fd\u63d0\u524d\u5e72\u5b8c\u4e86\u3002<\/p>\n

      \u516b\u3001\u7ec3\u4e60\u9898<\/h4>\n
    • \n

      \u7b80\u7b54\u9898：\u8bf7\u7528\u81ea\u5df1\u7684\u8bdd\u89e3\u91caIoC\u548cDI\u7684\u5173\u7cfb\u3002<\/p>\n<\/li>\n

    • \n

      \u4ee3\u7801\u9898：\u4f7f\u7528@Configuration + @Bean\u65b9\u5f0f，\u914d\u7f6e\u4e00\u4e2aDataSource Bean\u548c\u4e00\u4e2aUserDao Bean，UserDao\u4f9d\u8d56DataSource\u3002<\/p>\n<\/li>\n

    • \n

      \u5206\u6790\u9898：\u67d0Spring Boot\u9879\u76ee\u542f\u52a8\u975e\u5e38\u6162，\u7ecf\u6392\u67e5\u53d1\u73b0\u542f\u52a8\u65f6\u521b\u5efa\u4e86\u5927\u91cfBean\u3002\u8bf7\u5206\u6790\u53ef\u80fd\u7684\u539f\u56e0，\u5e76\u7ed9\u51fa\u4f18\u5316\u5efa\u8bae\u3002<\/p>\n<\/li>\n

      📊 \u4f60\u7684\u5b66\u4e60\u8fdb\u5ea6<\/h3>\n
        \n
      • \u5f53\u524d：\u7b2c73\u7bc7 \/ \u5171108\u7bc7 \u00b7 \u8fdb\u9636\u7bc7：Spring\u5168\u5bb6\u6876（\u7b2c73~82\u7bc7）<\/li>\n
      • \u2705 \u5df2\u5b8c\u6210：\u57fa\u7840\u7bc744\u7bc7 + \u7b2c45~73\u7bc7<\/li>\n
      • 📖 \u6b63\u5728\u5b66：\u7b2c73\u7bc7<\/li>\n
      • \u23f3 \u5f85\u5b66\u4e60：\u7b2c74~108\u7bc7<\/li>\n<\/ul>\n

        👉 📚 \u5b8c\u6574\u76ee\u5f55 & \u5b66\u4e60\u6307\u5357 | 🔥 \u8ba2\u9605\u672c\u4e13\u680f，\u4e0d\u9519\u8fc7\u6bcf\u4e00\u7bc7<\/p>\n

        👉 \u4e0b\u4e00\u7bc7\u6587\u7ae0\u9884\u544a<\/h3>\n

        🚀 \u4e0b\u4e00\u7bc7：\u300a\u7b2c74\u7bc7：Bean\u751f\u547d\u5468\u671f\u300b<\/p>\n

        \u5185\u5bb9\u7b80\u4ecb：Bean\u751f\u547d\u5468\u671f\u5b8c\u657415\u6b65\u8be6\u89e3\u3001BeanPostProcessor\u539f\u7406\u3001InitializingBean\u4e0e@PostConstruct\u6267\u884c\u987a\u5e8f\u3001\u9500\u6bc1\u6d41\u7a0b\u3001\u6269\u5c55\u70b9\u5b9e\u6218\u3002<\/p>\n

        👉 Spring\u5168\u5bb6\u6876\u4e13\u9898\u6301\u7eed\u63a8\u8fdb，\u6df1\u5165Bean\u751f\u547d\u5468\u671f！<\/p>\n

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