{"id":1989,"date":"2025-06-14T18:59:27","date_gmt":"2025-06-14T10:59:27","guid":{"rendered":"https:\/\/note.ui11.cc\/?p=1989"},"modified":"2025-06-14T18:59:28","modified_gmt":"2025-06-14T10:59:28","slug":"bean-%e7%9a%84%e7%94%9f%e5%91%bd%e5%91%a8%e6%9c%9f","status":"publish","type":"post","link":"https:\/\/note.ui11.cc\/index.php\/2025\/06\/14\/bean-%e7%9a%84%e7%94%9f%e5%91%bd%e5%91%a8%e6%9c%9f\/","title":{"rendered":"bean \u7684\u751f\u547d\u5468\u671f"},"content":{"rendered":"\n

Bean \u7684\u751f\u547d\u5468\u671f\u8be6\u89e3<\/h3>\n\n\n\n

\u5728 Spring \u6846\u67b6\u4e2d\uff0cBean \u7684\u751f\u547d\u5468\u671f\u662f\u4e00\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u6982\u5ff5\u3002\u7406\u89e3 Bean \u7684\u751f\u547d\u5468\u671f\u6709\u52a9\u4e8e\u6211\u4eec\u66f4\u597d\u5730\u4f7f\u7528 Spring\uff0c\u5305\u62ec\u5982\u4f55\u521d\u59cb\u5316\u8d44\u6e90\u3001\u5982\u4f55\u6e05\u7406\u8d44\u6e90\u4ee5\u53ca\u5982\u4f55\u81ea\u5b9a\u4e49 Bean \u7684\u521b\u5efa\u8fc7\u7a0b\u3002<\/p>\n\n\n\n

\u4e00\u3001Bean \u751f\u547d\u5468\u671f\u7684\u6838\u5fc3\u9636\u6bb5<\/h3>\n\n\n\n

Spring \u5bb9\u5668\u4e2d Bean \u7684\u751f\u547d\u5468\u671f\u53ef\u4ee5\u6982\u62ec\u4e3a\u4ee5\u4e0b\u51e0\u4e2a\u4e3b\u8981\u9636\u6bb5\uff1a<\/p>\n\n\n\n

    \n
  1. \u5b9e\u4f8b\u5316<\/strong>\uff1a\u521b\u5efa Bean \u7684\u5b9e\u4f8b\uff08\u901a\u8fc7\u6784\u9020\u5668\u6216\u5de5\u5382\u65b9\u6cd5\uff09<\/li>\n\n\n\n
  2. \u5c5e\u6027\u8d4b\u503c<\/strong>\uff1a\u8bbe\u7f6e Bean \u7684\u5c5e\u6027\u503c\uff08\u4f9d\u8d56\u6ce8\u5165\uff09<\/li>\n\n\n\n
  3. \u521d\u59cb\u5316<\/strong>\uff1a\u6267\u884c\u521d\u59cb\u5316\u65b9\u6cd5<\/li>\n\n\n\n
  4. \u4f7f\u7528<\/strong>\uff1aBean \u53ef\u4ee5\u88ab\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528<\/li>\n\n\n\n
  5. \u9500\u6bc1<\/strong>\uff1a\u5bb9\u5668\u5173\u95ed\u65f6\u6267\u884c\u9500\u6bc1\u65b9\u6cd5<\/li>\n<\/ol>\n\n\n\n

    \u4e8c\u3001\u751f\u547d\u5468\u671f\u7684\u8be6\u7ec6\u8fc7\u7a0b<\/h3>\n\n\n\n

    \u4e0b\u9762\u662f\u4e00\u4e2a\u66f4\u8be6\u7ec6\u7684\u6d41\u7a0b\u56fe\uff0c\u5c55\u793a\u4e86 Bean \u4ece\u521b\u5efa\u5230\u9500\u6bc1\u7684\u5b8c\u6574\u8fc7\u7a0b\uff1a<\/p>\n\n\n\n

    plaintext<\/p>\n\n\n\n

    Bean\u5b9a\u4e49\u6ce8\u518c\u5230\u5bb9\u5668 \u2192 \u5b9e\u4f8b\u5316Bean \u2192 \u586b\u5145\u5c5e\u6027 \u2192 \n\u5b9e\u73b0Aware\u63a5\u53e3\u7684\u65b9\u6cd5\u8c03\u7528 \u2192 BeanPostProcessor\u524d\u7f6e\u5904\u7406 \u2192 \n\u521d\u59cb\u5316\u65b9\u6cd5\u8c03\u7528 \u2192 BeanPostProcessor\u540e\u7f6e\u5904\u7406 \u2192 \nBean\u5c31\u7eea\u53ef\u4ee5\u4f7f\u7528 \u2192 \u5bb9\u5668\u5173\u95ed \u2192 \u9500\u6bc1\u65b9\u6cd5\u8c03\u7528\n<\/code><\/pre>\n\n\n\n
    \u4e09\u3001\u5173\u952e\u63a5\u53e3\u548c\u65b9\u6cd5<\/h3>\n\n\n\n
    1. \u5b9e\u4f8b\u5316\u76f8\u5173<\/h4>\n\n\n\n
      \n
    • InstantiationAwareBeanPostProcessor<\/strong>\uff1a\n
        \n
      • \u53ef\u4ee5\u5728\u5b9e\u4f8b\u5316\u524d\u548c\u5b9e\u4f8b\u5316\u540e\u8fdb\u884c\u5e72\u9884<\/li>\n\n\n\n
      • \u65b9\u6cd5\uff1apostProcessBeforeInstantiation<\/code>\u00a0\u548c\u00a0postProcessAfterInstantiation<\/code><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
        2. \u5c5e\u6027\u8d4b\u503c\u76f8\u5173<\/h4>\n\n\n\n
          \n
        • AutowiredAnnotationBeanPostProcessor<\/strong>\uff1a\n
            \n
          • \u5904\u7406 @Autowired\u3001@Resource \u7b49\u6ce8\u89e3<\/li>\n<\/ul>\n<\/li>\n\n\n\n
          • CommonAnnotationBeanPostProcessor<\/strong>\uff1a\n
              \n
            • \u5904\u7406 JSR-250 \u6ce8\u89e3\u5982 @PostConstruct\u3001@PreDestroy<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
              3. Aware \u63a5\u53e3<\/h4>\n\n\n\n
              Spring \u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217 Aware \u63a5\u53e3\uff0c\u5141\u8bb8 Bean \u83b7\u53d6\u5bb9\u5668\u7684\u76f8\u5173\u4fe1\u606f\uff1a<\/p>\n\n\n\n
                \n
              • BeanNameAware<\/strong>\uff1a\u83b7\u53d6 Bean \u5728\u5bb9\u5668\u4e2d\u7684\u540d\u79f0<\/li>\n\n\n\n
              • BeanFactoryAware<\/strong>\uff1a\u83b7\u53d6 BeanFactory<\/li>\n\n\n\n
              • ApplicationContextAware<\/strong>\uff1a\u83b7\u53d6 ApplicationContext<\/li>\n\n\n\n
              • ResourceLoaderAware<\/strong>\uff1a\u83b7\u53d6\u8d44\u6e90\u52a0\u8f7d\u5668<\/li>\n\n\n\n
              • ServletContextAware<\/strong>\uff08\u4ec5 Web \u5e94\u7528\uff09\uff1a\u83b7\u53d6 ServletContext<\/li>\n<\/ul>\n\n\n\n
                4. \u521d\u59cb\u5316\u76f8\u5173<\/h4>\n\n\n\n
                \u521d\u59cb\u5316\u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e09\u79cd\u65b9\u5f0f\u6307\u5b9a\uff1a<\/p>\n\n\n\n
                  \n
                1. \u5b9e\u73b0 InitializingBean \u63a5\u53e3<\/strong>\uff1ajavapublic class MyBean implements InitializingBean { @Override public void afterPropertiesSet() throws Exception { \/\/ \u521d\u59cb\u5316\u903b\u8f91 } }<\/code><\/li>\n\n\n\n
                2. \u4f7f\u7528 @PostConstruct \u6ce8\u89e3<\/strong>\uff1ajavapublic class MyBean { @PostConstruct public void init() { \/\/ \u521d\u59cb\u5316\u903b\u8f91 } }<\/code><\/li>\n\n\n\n
                3. \u5728 XML \u914d\u7f6e\u6216 @Bean \u6ce8\u89e3\u4e2d\u6307\u5b9a init-method<\/strong>\uff1ajava@Bean(initMethod = \"init\") public MyBean myBean() { return new MyBean(); }<\/code><\/li>\n<\/ol>\n\n\n\n
                  5. BeanPostProcessor<\/h4>\n\n\n\n
                  BeanPostProcessor \u5141\u8bb8\u5728 Bean \u521d\u59cb\u5316\u524d\u540e\u8fdb\u884c\u989d\u5916\u5904\u7406\uff1a<\/p>\n\n\n\n
                  java<\/p>\n\n\n\n
                  @Component\npublic class MyBeanPostProcessor implements BeanPostProcessor {\n    \n    @Override\n    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {\n        \/\/ \u5728\u521d\u59cb\u5316\u65b9\u6cd5\u8c03\u7528\u524d\u6267\u884c\n        return bean;\n    }\n    \n    @Override\n    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {\n        \/\/ \u5728\u521d\u59cb\u5316\u65b9\u6cd5\u8c03\u7528\u540e\u6267\u884c\n        return bean;\n    }\n}\n<\/code><\/pre>\n\n\n\n
                  6. \u9500\u6bc1\u76f8\u5173<\/h4>\n\n\n\n
                  \u9500\u6bc1\u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u4e09\u79cd\u65b9\u5f0f\u6307\u5b9a\uff1a<\/p>\n\n\n\n
                    \n
                  1. \u5b9e\u73b0 DisposableBean \u63a5\u53e3<\/strong>\uff1ajavapublic class MyBean implements DisposableBean { @Override public void destroy() throws Exception { \/\/ \u8d44\u6e90\u91ca\u653e\u903b\u8f91 } }<\/code><\/li>\n\n\n\n
                  2. \u4f7f\u7528 @PreDestroy \u6ce8\u89e3<\/strong>\uff1ajavapublic class MyBean { @PreDestroy public void cleanup() { \/\/ \u8d44\u6e90\u91ca\u653e\u903b\u8f91 } }<\/code><\/li>\n\n\n\n
                  3. \u5728 XML \u914d\u7f6e\u6216 @Bean \u6ce8\u89e3\u4e2d\u6307\u5b9a destroy-method<\/strong>\uff1ajava@Bean(destroyMethod = \"cleanup\") public MyBean myBean() { return new MyBean(); }<\/code><\/li>\n<\/ol>\n\n\n\n
                    \u56db\u3001\u81ea\u5b9a\u4e49\u751f\u547d\u5468\u671f\u5904\u7406\u5668<\/h3>\n\n\n\n
                    \u9664\u4e86\u4e0a\u8ff0\u6807\u51c6\u65b9\u6cd5\u5916\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u81ea\u5b9a\u4e49 Bean \u7684\u751f\u547d\u5468\u671f\uff1a<\/p>\n\n\n\n
                    1. BeanFactoryPostProcessor<\/h4>\n\n\n\n
                    \u5141\u8bb8\u5728 Bean \u5b9a\u4e49\u52a0\u8f7d\u540e\u4f46\u5b9e\u4f8b\u5316\u524d\u4fee\u6539 Bean \u5b9a\u4e49\uff1a<\/p>\n\n\n\n
                    java<\/p>\n\n\n\n
                    @Component\npublic class MyBeanFactoryPostProcessor implements BeanFactoryPostProcessor {\n    @Override\n    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {\n        \/\/ \u4fee\u6539Bean\u5b9a\u4e49\n        BeanDefinition beanDefinition = beanFactory.getBeanDefinition(\"myBean\");\n        beanDefinition.setScope(BeanDefinition.SCOPE_PROTOTYPE);\n    }\n}\n<\/code><\/pre>\n\n\n\n
                    2. DestructionAwareBeanPostProcessor<\/h4>\n\n\n\n
                    \u53ef\u4ee5\u5728 Bean \u9500\u6bc1\u524d\u8fdb\u884c\u989d\u5916\u5904\u7406\uff1a<\/p>\n\n\n\n
                    java<\/p>\n\n\n\n
                    @Component\npublic class MyDestructionAwareBeanPostProcessor implements DestructionAwareBeanPostProcessor {\n    @Override\n    public void postProcessBeforeDestruction(Object bean, String beanName) throws BeansException {\n        \/\/ \u5728\u9500\u6bc1\u524d\u6267\u884c\n    }\n    \n    @Override\n    public boolean requiresDestruction(Object bean) {\n        return true;\n    }\n}\n<\/code><\/pre>\n\n\n\n
                    \u4e94\u3001\u793a\u4f8b\u4ee3\u7801<\/h3>\n\n\n\n
                    \u4e0b\u9762\u662f\u4e00\u4e2a\u5b8c\u6574\u7684\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u4e00\u4e2a Bean \u7684\u751f\u547d\u5468\u671f\uff1a<\/p>\n\n\n\n
                    java<\/p>\n\n\n\n
                    import javax.annotation.PostConstruct;\nimport javax.annotation.PreDestroy;\nimport org.springframework.beans.BeansException;\nimport org.springframework.beans.factory.BeanNameAware;\nimport org.springframework.beans.factory.InitializingBean;\nimport org.springframework.context.ApplicationContext;\nimport org.springframework.context.ApplicationContextAware;\nimport org.springframework.stereotype.Component;\n\n@Component\npublic class MyBean implements BeanNameAware, ApplicationContextAware, InitializingBean {\n\n    private String name;\n    private ApplicationContext applicationContext;\n\n    \/\/ \u6784\u9020\u5668\n    public MyBean() {\n        System.out.println(\"MyBean: \u6784\u9020\u5668\u88ab\u8c03\u7528\");\n    }\n\n    \/\/ Setter\u65b9\u6cd5\uff08\u4f9d\u8d56\u6ce8\u5165\uff09\n    public void setName(String name) {\n        System.out.println(\"MyBean: \u8bbe\u7f6ename\u5c5e\u6027\");\n        this.name = name;\n    }\n\n    \/\/ BeanNameAware\u63a5\u53e3\u65b9\u6cd5\n    @Override\n    public void setBeanName(String beanName) {\n        System.out.println(\"MyBean: \u5b9e\u73b0BeanNameAware\uff0c\u83b7\u53d6bean\u540d\u79f0: \" + beanName);\n    }\n\n    \/\/ ApplicationContextAware\u63a5\u53e3\u65b9\u6cd5\n    @Override\n    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {\n        System.out.println(\"MyBean: \u5b9e\u73b0ApplicationContextAware\uff0c\u83b7\u53d6\u5e94\u7528\u4e0a\u4e0b\u6587\");\n        this.applicationContext = applicationContext;\n    }\n\n    \/\/ @PostConstruct\u6ce8\u89e3\u7684\u521d\u59cb\u5316\u65b9\u6cd5\n    @PostConstruct\n    public void postConstructInit() {\n        System.out.println(\"MyBean: @PostConstruct\u6ce8\u89e3\u7684\u521d\u59cb\u5316\u65b9\u6cd5\u88ab\u8c03\u7528\");\n    }\n\n    \/\/ InitializingBean\u63a5\u53e3\u65b9\u6cd5\n    @Override\n    public void afterPropertiesSet() throws Exception {\n        System.out.println(\"MyBean: \u5b9e\u73b0InitializingBean\uff0cafterPropertiesSet\u65b9\u6cd5\u88ab\u8c03\u7528\");\n    }\n\n    \/\/ \u81ea\u5b9a\u4e49\u521d\u59cb\u5316\u65b9\u6cd5\n    public void customInit() {\n        System.out.println(\"MyBean: \u81ea\u5b9a\u4e49init-method\u65b9\u6cd5\u88ab\u8c03\u7528\");\n    }\n\n    \/\/ @PreDestroy\u6ce8\u89e3\u7684\u9500\u6bc1\u65b9\u6cd5\n    @PreDestroy\n    public void preDestroy() {\n        System.out.println(\"MyBean: @PreDestroy\u6ce8\u89e3\u7684\u9500\u6bc1\u65b9\u6cd5\u88ab\u8c03\u7528\");\n    }\n\n    \/\/ DisposableBean\u63a5\u53e3\u65b9\u6cd5\n    public void destroy() throws Exception {\n        System.out.println(\"MyBean: \u5b9e\u73b0DisposableBean\uff0cdestroy\u65b9\u6cd5\u88ab\u8c03\u7528\");\n    }\n\n    \/\/ \u81ea\u5b9a\u4e49\u9500\u6bc1\u65b9\u6cd5\n    public void customDestroy() {\n        System.out.println(\"MyBean: \u81ea\u5b9a\u4e49destroy-method\u65b9\u6cd5\u88ab\u8c03\u7528\");\n    }\n\n    \/\/ \u4e1a\u52a1\u65b9\u6cd5\n    public void doSomething() {\n        System.out.println(\"MyBean: \u6267\u884cdoSomething\u65b9\u6cd5\");\n    }\n}\n<\/code><\/pre>\n\n\n\n
                    \u914d\u7f6e\u7c7b\uff1a<\/p>\n\n\n\n
                    java<\/p>\n\n\n\n
                    import org.springframework.context.annotation.Bean;\nimport org.springframework.context.annotation.Configuration;\n\n@Configuration\npublic class AppConfig {\n    \n    @Bean(initMethod = \"customInit\", destroyMethod = \"customDestroy\")\n    public MyBean myBean() {\n        MyBean bean = new MyBean();\n        bean.setName(\"TestBean\");\n        return bean;\n    }\n}\n<\/code><\/pre>\n\n\n\n
                    \u516d\u3001\u751f\u547d\u5468\u671f\u603b\u7ed3<\/h3>\n\n\n\n
                    Bean \u7684\u5b8c\u6574\u751f\u547d\u5468\u671f\u53ef\u4ee5\u6982\u62ec\u4e3a\uff1a<\/p>\n\n\n\n
                      \n
                    1. \u5b9e\u4f8b\u5316<\/strong>\uff1a\u901a\u8fc7\u6784\u9020\u5668\u521b\u5efa Bean \u5bf9\u8c61<\/li>\n\n\n\n
                    2. \u4f9d\u8d56\u6ce8\u5165<\/strong>\uff1a\u8bbe\u7f6e Bean \u7684\u5c5e\u6027\u503c<\/li>\n\n\n\n
                    3. Aware \u63a5\u53e3\u56de\u8c03<\/strong>\uff1a\u5982\u679c\u5b9e\u73b0\u4e86 Aware \u63a5\u53e3\uff0c\u8c03\u7528\u76f8\u5e94\u7684\u65b9\u6cd5<\/li>\n\n\n\n
                    4. BeanPostProcessor \u524d\u7f6e\u5904\u7406<\/strong>\uff1a\u8c03\u7528\u6240\u6709\u6ce8\u518c\u7684 BeanPostProcessor \u7684\u524d\u7f6e\u5904\u7406\u65b9\u6cd5<\/li>\n\n\n\n
                    5. \u521d\u59cb\u5316\u65b9\u6cd5\u8c03\u7528<\/strong>\uff1a\u6309\u987a\u5e8f\u8c03\u7528 @PostConstruct\u3001InitializingBean \u63a5\u53e3\u65b9\u6cd5\u3001\u81ea\u5b9a\u4e49\u521d\u59cb\u5316\u65b9\u6cd5<\/li>\n\n\n\n
                    6. BeanPostProcessor \u540e\u7f6e\u5904\u7406<\/strong>\uff1a\u8c03\u7528\u6240\u6709\u6ce8\u518c\u7684 BeanPostProcessor \u7684\u540e\u7f6e\u5904\u7406\u65b9\u6cd5<\/li>\n\n\n\n
                    7. Bean \u5c31\u7eea\u4f7f\u7528<\/strong>\uff1aBean \u53ef\u4ee5\u88ab\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528<\/li>\n\n\n\n
                    8. \u5bb9\u5668\u5173\u95ed<\/strong>\uff1a\u5f53\u5bb9\u5668\u5173\u95ed\u65f6\uff0c\u8c03\u7528\u9500\u6bc1\u65b9\u6cd5<\/li>\n\n\n\n
                    9. \u9500\u6bc1\u65b9\u6cd5\u8c03\u7528<\/strong>\uff1a\u6309\u987a\u5e8f\u8c03\u7528 @PreDestroy\u3001DisposableBean \u63a5\u53e3\u65b9\u6cd5\u3001\u81ea\u5b9a\u4e49\u9500\u6bc1\u65b9\u6cd5<\/li>\n<\/ol>\n\n\n\n
                      \u7406\u89e3 Bean \u7684\u751f\u547d\u5468\u671f\u6709\u52a9\u4e8e\u6211\u4eec\u66f4\u597d\u5730\u63a7\u5236 Spring Bean \u7684\u521b\u5efa\u548c\u9500\u6bc1\u8fc7\u7a0b\uff0c\u6b63\u786e\u5730\u521d\u59cb\u5316\u8d44\u6e90\u548c\u91ca\u653e\u8d44\u6e90<\/p>\n","protected":false},"excerpt":{"rendered":"
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