{"id":356,"date":"2025-09-03T18:27:45","date_gmt":"2025-09-03T10:27:45","guid":{"rendered":"https:\/\/heyingnian.com\/?p=356"},"modified":"2025-09-03T18:34:24","modified_gmt":"2025-09-03T10:34:24","slug":"spring-bean","status":"publish","type":"post","link":"https:\/\/heyingnian.com\/index.php\/2025\/09\/03\/spring-bean\/","title":{"rendered":"Spring Bean\u751f\u547d\u5468\u671f"},"content":{"rendered":"\n

\ud83c\udf73 Spring Bean \u751f\u547d\u5468\u671f\u5168\u89e3\u6790\uff1a\u7528\u201c\u505a\u7ea2\u70e7\u8089\u201d\u8bb2\u900f\u6bcf\u4e00\u4e2a\u9636\u6bb5<\/h1>\n\n\n\n
\n

\u4f5c\u8005<\/strong>\uff1a\u8d6b\u82f1\u5e74
\u5173\u952e\u8bcd<\/strong>\uff1aSpring Bean \u751f\u547d\u5468\u671f\u3001\u4f9d\u8d56\u6ce8\u5165\u3001BeanPostProcessor\u3001@PostConstruct\u3001AOP \u539f\u7406<\/p>\n<\/blockquote>\n\n\n\n

\n\n\n\n

\ud83d\udd25 \u5f15\u8a00\uff1a\u505a\u4e00\u9053\u201c\u7ea2\u70e7\u8089\u201d\uff0c\u7406\u89e3\u4e00\u4e2a Spring Bean<\/h2>\n\n\n\n

\u5728 Spring \u6846\u67b6\u4e2d\uff0cBean \u7684\u751f\u547d\u5468\u671f\u662f\u6838\u5fc3\u673a\u5236\u4e4b\u4e00\u3002
\u4eca\u5929\u6211\u4eec\u7528\u4e00\u9053\u201c\u5bb6\u5e38\u7ea2\u70e7\u8089\u201d\u6765\u7c7b\u6bd4\u6574\u4e2a\u6d41\u7a0b\uff0c\u4ece\u4e70\u8089\u5230\u6d17\u7897\uff0c\u5b8c\u6574\u8fd8\u539f Spring \u5bb9\u5668\u662f\u5982\u4f55\u7ba1\u7406\u4e00\u4e2a Bean \u7684\u3002<\/p>\n\n\n\n

\n\n\n\n

\ud83e\udde9 \u6574\u4f53\u6bd4\u55bb\u56de\u987e\uff1a\u505a\u4e00\u9053\u201c\u7ea2\u70e7\u8089\u201d = \u521b\u5efa\u4e00\u4e2a Spring Bean<\/h2>\n\n\n\n
\u751f\u6d3b\u9636\u6bb5<\/th>Spring \u9636\u6bb5<\/th>\u4ee3\u7801\u6f14\u793a<\/th><\/tr><\/thead>
1. \u4e70\u8089<\/td>\u5b9e\u4f8b\u5316\uff08Instantiation\uff09<\/td>new BraisedPork()<\/code><\/td><\/tr>
2. \u814c\u8089<\/td>\u5c5e\u6027\u8d4b\u503c\uff08Dependency Injection\uff09<\/td>@Autowired<\/code> \u9171\u6cb9\u3001\u6599\u9152<\/td><\/tr>
3. \u5207\u8089\u524d\u770b\u770b<\/td>\u521d\u59cb\u5316\u524d\uff08postProcessBeforeInitialization\uff09<\/td>\u68c0\u67e5\/\u66ff\u6362\u5bf9\u8c61<\/td><\/tr>
4. \u6b63\u5f0f\u5f00\u706b<\/td>\u521d\u59cb\u5316\uff08@PostConstruct<\/code> \/ init-method<\/code>\uff09<\/td>\u712f\u6c34\u3001\u7092\u7cd6\u8272<\/td><\/tr>
5. \u4e0a\u9505\u524d\u518d\u68c0\u67e5<\/td>\u521d\u59cb\u5316\u540e\uff08postProcessAfterInitialization\uff09<\/td>\u52a0\u201c\u4ee3\u7406\u201d\uff08\u5982\u4e8b\u52a1\uff09<\/td><\/tr>
6. \u4e0a\u83dc<\/td>\u4f7f\u7528 Bean<\/td>service.cook()<\/code><\/td><\/tr>
7. \u6d17\u7897<\/td>\u9500\u6bc1\uff08@PreDestroy<\/code> \/ destroy-method<\/code>\uff09<\/td>\u5173\u706b\u3001\u6d17\u9505<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n\n\n\n

\ud83e\uddf1 1. \u9636\u6bb5\u4e00\uff1a\u4e70\u8089 \u2014\u2014 \u5b9e\u4f8b\u5316\uff08Instantiation\uff09<\/h2>\n\n\n\n

\u6bd4\u55bb<\/strong>\uff1a\u53bb\u5e02\u573a\u4e70\u4e00\u5757\u4e94\u82b1\u8089 \u2192 \u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/p>\n\n\n\n

\/\/ BraisedPork.java\npublic class BraisedPork {\n\n    private String name;\n    private SoySauce soySauce;  \/\/ \u9171\u6cb9\uff08\u4f9d\u8d56\uff09\n    private CookingOil oil;     \/\/ \u98df\u7528\u6cb9\uff08\u4f9d\u8d56\uff09\n\n    \/\/ \u65e0\u53c2\u6784\u9020\uff1a\u76f8\u5f53\u4e8e\u201c\u4e70\u8089\u201d\n    public BraisedPork() {\n        System.out.println(\"\ud83e\udd69 1. \u4e70\u8089\uff1aBraisedPork \u5b9e\u4f8b\u5316\u4e86\uff01new \u51fa\u6765\u4e86\uff01\");\n    }\n\n    \/\/ setter \u7528\u4e8e\u6ce8\u5165\u4f9d\u8d56\uff08\u814c\u8089\uff09\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public void setSoySauce(SoySauce soySauce) {\n        this.soySauce = soySauce;\n    }\n\n    public void setOil(CookingOil oil) {\n        this.oil = oil;\n    }\n\n    public void cook() {\n        System.out.println(\"\ud83c\udf73 \u6b63\u5728\u70f9\u996a\uff1a\" + name + \"\uff0c\u7528\u7684\u9171\u6cb9\u662f\uff1a\" + soySauce.getType());\n    }\n}<\/code><\/pre>\n\n\n\n
\u2705 \u5b9e\u4f8b\u5316\u5c31\u662f new BraisedPork()<\/code>\uff0cSpring \u5bb9\u5668\u8d1f\u8d23\u8c03\u7528\u6784\u9020\u51fd\u6570\u3002<\/p>\n\n\n\n
\n\n\n\n
\ud83e\uddc2 2. \u9636\u6bb5\u4e8c\uff1a\u814c\u8089 \u2014\u2014 \u5c5e\u6027\u8d4b\u503c\uff08Populate Properties\uff09<\/h2>\n\n\n\n
\u6bd4\u55bb<\/strong>\uff1a\u7528\u9171\u6cb9\u3001\u6599\u9152\u814c\u8089 \u2192 \u6ce8\u5165\u4f9d\u8d56\u3002<\/p>\n\n\n\n
\/\/ SoySauce.java\npublic class SoySauce {\n    private String type;\n\n    public SoySauce(String type) {\n        this.type = type;\n    }\n\n    public String getType() {\n        return type;\n    }\n}\n\n\/\/ CookingOil.java\npublic class CookingOil {\n    private String brand;\n\n    public CookingOil(String brand) {\n        this.brand = brand;\n    }\n}<\/code><\/pre>\n\n\n\n
\/\/ AppConfig.java\nimport org.springframework.context.annotation.*;\n\n@Configuration\npublic class AppConfig {\n\n    @Bean\n    public SoySauce soySauce() {\n        return new SoySauce(\"\u8001\u62bd\");\n    }\n\n    @Bean\n    public CookingOil cookingOil() {\n        return new CookingOil(\"\u91d1\u9f99\u9c7c\");\n    }\n\n    @Bean\n    public BraisedPork braisedPork() {\n        BraisedPork pork = new BraisedPork();\n        pork.setName(\"\u5bb6\u5e38\u7ea2\u70e7\u8089\");  \/\/ \u8fd9\u4e00\u6b65\u5c31\u662f\u201c\u814c\u8089\u201d\n        return pork;\n    }\n}<\/code><\/pre>\n\n\n\n
\u2705 Spring \u4f1a\u81ea\u52a8\u628a soySauce()<\/code> \u548c cookingOil()<\/code> \u6ce8\u5165\u5230 BraisedPork<\/code> \u4e2d\uff08\u901a\u8fc7 setter \u6216\u5b57\u6bb5\u6ce8\u5165\uff09\u3002<\/p>\n\n\n\n
\n\n\n\n
\ud83d\udd0d \u4e3a\u4ec0\u4e48\u80fd\u81ea\u52a8\u6ce8\u5165 soySauce()<\/code> \u548c cookingOil()<\/code>\uff1f\u2014\u2014 Spring \u5bb9\u5668\u7684\u201c\u81ea\u52a8\u88c5\u914d\u201d\u673a\u5236<\/h3>\n\n\n\n
\u8fd9\u6bb5\u4ee3\u7801\uff1a<\/p>\n\n\n\n
@Bean\npublic BraisedPork braisedPork() {\n    BraisedPork pork = new BraisedPork();\n    pork.setName(\"\u5bb6\u5e38\u7ea2\u70e7\u8089\");\n    return pork;\n}<\/code><\/pre>\n\n\n\n
\u770b\u8d77\u6765\u786e\u5b9e\u6ca1\u6709\u6ce8\u5165 SoySauce<\/code> \u548c CookingOil<\/code>\uff0c\u4f46 Spring \u4f1a\u5728\u4f60\u8fd4\u56de\u8fd9\u4e2a\u5bf9\u8c61\u4e4b\u540e\uff0c\u81ea\u52a8\u5b8c\u6210\u4f9d\u8d56\u6ce8\u5165\uff01<\/strong><\/p>\n\n\n\n
\ud83d\udd27 \u5173\u952e\u673a\u5236\uff1a\u5c5e\u6027\u6ce8\u5165\u53d1\u751f\u5728 @Bean<\/code> \u65b9\u6cd5\u8fd4\u56de\u4e4b\u540e<\/h4>\n\n\n\n
Spring \u7684\u6d41\u7a0b\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n
    \n
  1. \u8c03\u7528\u4f60\u7684\u00a0braisedPork()<\/code>\u00a0\u65b9\u6cd5\uff0c\u5f97\u5230\u4e00\u4e2a\u00a0BraisedPork<\/code>\u00a0\u5b9e\u4f8b\uff08\u6b64\u65f6\u53ea\u6709\u00a0name<\/code>\u00a0\u88ab\u8bbe\u7f6e\uff09\u3002<\/li>\n\n\n\n
  2. Spring \u62ff\u5230\u8fd9\u4e2a\u5b9e\u4f8b\u540e\uff0c\u626b\u63cf\u5b83\u7684\u5b57\u6bb5\u6216 setter \u65b9\u6cd5<\/strong>\u3002<\/li>\n\n\n\n
  3. \u53d1\u73b0\u5b83\u6709\u00a0setSoySauce(SoySauce)<\/code>\u00a0\u548c\u00a0setOil(CookingOil)<\/code>\u00a0\u65b9\u6cd5\uff08\u6216\u00a0@Autowired<\/code>\u00a0\u5b57\u6bb5\uff09\u3002<\/li>\n\n\n\n
  4. Spring \u53bb\u5bb9\u5668\u91cc\u627e\u7c7b\u578b\u5339\u914d\u7684 Bean\uff08SoySauce<\/code>\u00a0\u548c\u00a0CookingOil<\/code>\uff09\u3002<\/li>\n\n\n\n
  5. \u627e\u5230\u540e\uff0c\u81ea\u52a8\u8c03\u7528\u00a0pork.setSoySauce(...)<\/code>\u00a0\u548c\u00a0pork.setOil(...)<\/code><\/strong>\u3002<\/li>\n\n\n\n
  6. \u6700\u7ec8\u653e\u5165\u5bb9\u5668\u7684\u00a0BraisedPork<\/code>\u00a0\u662f\u5df2\u7ecf\u88ab\u6ce8\u5165\u597d\u4f9d\u8d56\u7684\u5b8c\u6574\u5bf9\u8c61<\/strong>\u3002<\/li>\n<\/ol>\n\n\n\n
    \u2705 \u4e3e\u4e2a\u66f4\u76f4\u767d\u7684\u4f8b\u5b50<\/h4>\n\n\n\n
    \u5047\u8bbe Spring \u5185\u90e8\u662f\u8fd9\u6837\u5de5\u4f5c\u7684\uff08\u7b80\u5316\u7248\uff09\uff1a<\/p>\n\n\n\n
    \/\/ \u7b2c\u4e00\u6b65\uff1a\u8c03\u7528\u4f60\u7684 @Bean \u65b9\u6cd5\nBraisedPork pork = appConfig.braisedPork(); \n\/\/ \u6b64\u65f6 pork.name = \"\u5bb6\u5e38\u7ea2\u70e7\u8089\"\uff0c\u4f46 soySauce = null, oil = null\n\n\/\/ \u7b2c\u4e8c\u6b65\uff1aSpring \u81ea\u52a8\u6ce8\u5165\u4f9d\u8d56\nSoySauce sauce = appConfig.soySauce();     \/\/ \u4ece\u5bb9\u5668\u83b7\u53d6\nCookingOil oil = appConfig.cookingOil();   \/\/ \u4ece\u5bb9\u5668\u83b7\u53d6\n\npork.setSoySauce(sauce);  \/\/ Spring \u81ea\u52a8\u8c03\u7528\npork.setOil(oil);         \/\/ Spring \u81ea\u52a8\u8c03\u7528\n\n\/\/ \u7b2c\u4e09\u6b65\uff1a\u8fd9\u4e2a pork \u624d\u771f\u6b63\u653e\u5165 Spring \u5bb9\u5668\ncontainer.put(\"braisedPork\", pork);<\/code><\/pre>\n\n\n\n
    \u6240\u4ee5\uff0c\u4f60\u4e0d\u9700\u8981\u624b\u52a8\u5199 setSoySauce()<\/code>\uff0cSpring \u4f1a\u5e2e\u4f60\u8865\u4e0a\uff01<\/strong><\/p>\n\n\n\n
    \n\n\n\n
    \ud83d\udd0d 3. \u9636\u6bb5\u4e09\uff1a\u5207\u8089\u524d\u770b\u770b \u2014\u2014 \u521d\u59cb\u5316\u524d\uff08postProcessBeforeInitialization<\/code>\uff09<\/h2>\n\n\n\n
    \u6bd4\u55bb<\/strong>\uff1a\u4f60\u6b63\u8981\u5207\u8089\uff0c\u53d1\u73b0\u8089\u592a\u80a5\uff0c\u51b3\u5b9a\u6362\u6210\u7626\u8089 \u2192 \u53ef\u68c0\u67e5\u6216\u66ff\u6362 Bean\u3002<\/p>\n\n\n\n
    \/\/ MyBeanPostProcessor.java\nimport org.springframework.beans.factory.config.BeanPostProcessor;\nimport org.springframework.stereotype.Component;\n\n@Component\npublic class MyBeanPostProcessor implements BeanPostProcessor {\n\n    @Override\n    public Object postProcessBeforeInitialization(Object bean, String beanName) {\n        System.out.println(\"\ud83d\udd2a 3. \u5207\u8089\u524d\u68c0\u67e5\uff1aBean '\" + beanName + \"' \u5373\u5c06\u521d\u59cb\u5316...\");\n\n        \/\/ \u68c0\u67e5\u662f\u4e0d\u662f\u7ea2\u70e7\u8089\n        if (bean instanceof BraisedPork) {\n            BraisedPork pork = (BraisedPork) bean;\n            System.out.println(\"\ud83d\udd0d \u53d1\u73b0\u7ea2\u70e7\u8089\uff0c\u5f53\u524d\u540d\u5b57\uff1a\" + pork.getClass().getSimpleName());\n\n            \/\/ \u53ef\u4ee5\u4fee\u6539\u5b83\n            \/\/ \u6ce8\u610f\uff1a\n            \/\/ 1. \u5982\u679c name \u662f\u5728 @Bean \u65b9\u6cd5\u4e2d\u901a\u8fc7 setName() \u624b\u52a8\u8bbe\u7f6e\u7684 \u2192 \u6b64\u65f6\u5df2\u8d4b\u503c\uff0c\u53ef\u5b89\u5168\u4fee\u6539\n            \/\/ 2. \u5982\u679c name \u662f\u901a\u8fc7 @Value(\"${...}\") \u6ce8\u5165\u7684 \u2192 \u6b64\u65f6\u53ef\u80fd\u8fd8\u672a\u6ce8\u5165\uff08@Value \u5904\u7406\u65f6\u673a\u8f83\u665a\uff09\n            \/\/    \u5728 postProcessBeforeInitialization \u4e2d\u8bfb\u53d6\u6216\u4fee\u6539\uff0c\u53ef\u80fd\u62ff\u5230 null \u6216\u9ed8\u8ba4\u503c\n            \/\/    \u6539\u4e86\u4e5f\u767d\u6539\uff0c\u56e0\u4e3a\u540e\u7eed\u8fd8\u4f1a\u88ab @Value \u8986\u76d6        }\n\n        \/\/ \u751a\u81f3\u53ef\u4ee5\u66ff\u6362\u6574\u4e2a\u5bf9\u8c61\uff08\u9ad8\u7ea7\u73a9\u6cd5\uff09\n        \/*\n        if (\"braisedPork\".equals(beanName)) {\n            System.out.println(\"\u26a0\ufe0f  \u5f3a\u884c\u66ff\u6362\u4e86\u7ea2\u70e7\u8089\uff01\");\n            return new BraisedPork() {{\n                setName(\"\u88ab\u66ff\u6362\u7684\u7ea2\u70e7\u8089\");\n            }};\n        }\n        *\/\n\n        return bean; \/\/ \u7ee7\u7eed\u4f7f\u7528\u539f\u5bf9\u8c61\n    }\n}<\/code><\/pre>\n\n\n\n
    \u2705 \u8fd9\u4e2a\u65b9\u6cd5\u5728 @PostConstruct<\/code> \u4e4b\u524d\u8c03\u7528\uff0c\u4f60\u53ef\u4ee5\uff1a<\/p>\n\n\n\n
      \n
    • \u6253\u65e5\u5fd7<\/li>\n\n\n\n
    • \u505a\u5b89\u5168\u68c0\u67e5<\/li>\n\n\n\n
    • \u8fd4\u56de\u4e00\u4e2a\u5305\u88c5\u5bf9\u8c61\uff08\u5982\u4ee3\u7406\uff09<\/li>\n\n\n\n
    • \u6781\u7aef\u60c5\u51b5\u4e0b\u66ff\u6362\u6574\u4e2a Bean\uff08\u4e0d\u63a8\u8350\uff09<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n
      \ud83d\udd25 4. \u9636\u6bb5\u56db\uff1a\u6b63\u5f0f\u5f00\u706b \u2014\u2014 \u521d\u59cb\u5316\uff08Initialization\uff09<\/h2>\n\n\n\n
      \u6bd4\u55bb<\/strong>\uff1a\u712f\u6c34\u3001\u7092\u7cd6\u8272\u3001\u52a0\u9999\u6599 \u2192 \u51c6\u5907\u5de5\u4f5c\u3002<\/p>\n\n\n\n
      \/\/ \u5728 BraisedPork.java \u4e2d\u6dfb\u52a0\uff1a\n\nimport jakarta.annotation.PostConstruct;\nimport org.springframework.beans.factory.InitializingBean;\n\npublic class BraisedPork implements InitializingBean {\n    \/\/ ... \u5176\u4ed6\u4ee3\u7801\n\n    @PostConstruct\n    public void startFire() {\n        System.out.println(\"\ud83d\udd25 4.1 @PostConstruct\uff1a\u5f00\u706b\uff01\u5f00\u59cb\u7092\u7cd6\u8272...\");\n    }\n\n    @Override\n    public void afterPropertiesSet() throws Exception {\n        System.out.println(\"\ud83d\udd25 4.2 afterPropertiesSet\uff1a\u52a0\u516b\u89d2\u3001\u6842\u76ae\uff0c\u8c03\u6599\u4e0b\u9505\uff01\");\n    }\n\n    public void customInit() {\n        System.out.println(\"\ud83d\udd25 4.3 customInit\uff1a\u5927\u706b\u6536\u6c41\uff0c\u51c6\u5907\u51fa\u9505\uff01\");\n    }\n}<\/code><\/pre>\n\n\n\n
      \/\/ \u4fee\u6539 AppConfig.java \u4e2d\u7684 Bean \u5b9a\u4e49\uff1a\n@Bean(initMethod = \"customInit\")\npublic BraisedPork braisedPork() {\n    BraisedPork pork = new BraisedPork();\n    pork.setName(\"\u5bb6\u5e38\u7ea2\u70e7\u8089\");\n    return pork;\n}<\/code><\/pre>\n\n\n\n
      \u2705 \u6267\u884c\u987a\u5e8f\uff1a<\/p>\n\n\n\n
        \n
      1. @PostConstruct<\/code><\/li>\n\n\n\n
      2. afterPropertiesSet()<\/code><\/li>\n\n\n\n
      3. init-method<\/code><\/li>\n<\/ol>\n\n\n\n
        \n\n\n\n
        \ud83d\udc68\u200d\ud83c\udf73 5. \u9636\u6bb5\u4e94\uff1a\u4e0a\u9505\u524d\u518d\u68c0\u67e5 \u2014\u2014 \u521d\u59cb\u5316\u540e\uff08postProcessAfterInitialization<\/code>\uff09<\/h2>\n\n\n\n
        \u6bd4\u55bb<\/strong>\uff1a\u83dc\u5feb\u597d\u4e86\uff0c\u4f60\u7ed9\u5b83\u52a0\u4e2a\u201c\u9632\u4f2a\u6807\u7b7e\u201d\u6216\u201c\u62cd\u7167\u201d \u2192 AOP \u4ee3\u7406\u751f\u6210\u3002<\/p>\n\n\n\n
        \/\/ \u7ee7\u7eed\u5728 MyBeanPostProcessor.java \u4e2d\uff1a\n\n@Override\npublic Object postProcessAfterInitialization(Object bean, String beanName) {\n    System.out.println(\"\ud83d\udc68\u200d\ud83c\udf73 5. \u4e0a\u9505\u524d\u68c0\u67e5\uff1aBean '\" + beanName + \"' \u5df2\u521d\u59cb\u5316\u5b8c\u6210\uff01\");\n\n    if (bean instanceof BraisedPork) {\n        System.out.println(\"\ud83d\udcf8 \u7ed9\u7ea2\u70e7\u8089\u52a0\u4e2a\u2018\u7f8e\u98df\u6ee4\u955c\u2019\uff08AOP \u4ee3\u7406\uff09\uff01\");\n        \n        \/\/ \u771f\u5b9e\u573a\u666f\uff1aSpring AOP \u5c31\u5728\u8fd9\u91cc\u751f\u6210\u4ee3\u7406\u5bf9\u8c61\n        \/\/ \u6bd4\u5982 @Transactional\u3001@Cacheable \u90fd\u662f\u8fd9\u4e48\u52a0\u7684\n    }\n\n    return bean; \/\/ \u5b9e\u9645\u4e0a\u53ef\u4ee5\u8fd4\u56de\u4e00\u4e2a\u4ee3\u7406\u5bf9\u8c61\n}<\/code><\/pre>\n\n\n\n
        \u2705 \u8fd9\u662f AOP \u7684\u6838\u5fc3\u9636\u6bb5\uff01Spring \u5728\u8fd9\u91cc\u7ed9\u4f60\u7684 Bean \u201c\u5305\u4e00\u5c42\u201d\uff0c\u6bd4\u5982\u52a0\u4e8b\u52a1\u63a7\u5236\u3002<\/p>\n\n\n\n
        \n\n\n\n
        \ud83c\udf7d\ufe0f 6. \u9636\u6bb5\u516d\uff1a\u4e0a\u83dc \u2014\u2014 \u4f7f\u7528 Bean<\/h2>\n\n\n\n
        \/\/ App.java\nimport org.springframework.context.ApplicationContext;\nimport org.springframework.context.annotation.AnnotationConfigApplicationContext;\n\npublic class App {\n    public static void main(String[] args) {\n        ApplicationContext ctx = new AnnotationConfigApplicationContext(AppConfig.class);\n\n        \/\/ \u4e0a\u83dc\uff01\n        BraisedPork pork = ctx.getBean(BraisedPork.class);\n        System.out.println(\"\ud83c\udf7d\ufe0f  6. \u4e0a\u83dc\u5566\uff01\");\n        pork.cook();\n\n        \/\/ \u5173\u95ed\u5bb9\u5668\uff08\u89e6\u53d1\u9500\u6bc1\uff09\n        ((AnnotationConfigApplicationContext) ctx).close();\n    }\n}<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        \ud83e\uddfd 7. \u9636\u6bb5\u4e03\uff1a\u6d17\u7897 \u2014\u2014 \u9500\u6bc1\uff08Destruction\uff09<\/h2>\n\n\n\n
        \u6bd4\u55bb<\/strong>\uff1a\u5173\u706b\u3001\u6d17\u9505\u3001\u6536\u62fe\u53a8\u623f \u2192 \u91ca\u653e\u8d44\u6e90\u3002<\/p>\n\n\n\n
        \/\/ \u5728 BraisedPork.java \u4e2d\u6dfb\u52a0\uff1a\n\nimport jakarta.annotation.PreDestroy;\nimport org.springframework.beans.factory.DisposableBean;\n\npublic class BraisedPork implements InitializingBean, DisposableBean {\n    \/\/ ... \u5176\u4ed6\u4ee3\u7801\n\n    @PreDestroy\n    public void turnOffFire() {\n        System.out.println(\"\ud83e\uddfd 7.1 @PreDestroy\uff1a\u5173\u706b\uff01\");\n    }\n\n    @Override\n    public void destroy() throws Exception {\n        System.out.println(\"\ud83e\uddfd 7.2 DisposableBean.destroy\uff1a\u6d17\u9505\uff01\");\n    }\n\n    public void customDestroy() {\n        System.out.println(\"\ud83e\uddfd 7.3 customDestroy\uff1a\u64e6\u7076\u53f0\uff0c\u6253\u626b\u53a8\u623f\uff01\");\n    }\n}<\/code><\/pre>\n\n\n\n
        \/\/ \u4fee\u6539 AppConfig.java\n@Bean(initMethod = \"customInit\", destroyMethod = \"customDestroy\")\npublic BraisedPork braisedPork() {\n    \/\/ ...\n}<\/code><\/pre>\n\n\n\n
        \u2705 \u6267\u884c\u987a\u5e8f\uff1a<\/p>\n\n\n\n
          \n
        1. @PreDestroy<\/code><\/li>\n\n\n\n
        2. destroy()<\/code><\/li>\n\n\n\n
        3. destroy-method<\/code><\/li>\n<\/ol>\n\n\n\n
          \n\n\n\n
          \ud83c\udfc1 \u8fd0\u884c\u7ed3\u679c\uff08\u63a7\u5236\u53f0\u8f93\u51fa\uff09<\/h2>\n\n\n\n
          \u6df1\u8272\u7248\u672c\ud83e\udd69 1. \u4e70\u8089\uff1aBraisedPork \u5b9e\u4f8b\u5316\u4e86\uff01new \u51fa\u6765\u4e86\uff01\n\ud83d\udd2a 3. \u5207\u8089\u524d\u68c0\u67e5\uff1aBean 'braisedPork' \u5373\u5c06\u521d\u59cb\u5316...\n\ud83d\udd25 4.1 @PostConstruct\uff1a\u5f00\u706b\uff01\u5f00\u59cb\u7092\u7cd6\u8272...\n\ud83d\udd25 4.2 afterPropertiesSet\uff1a\u52a0\u516b\u89d2\u3001\u6842\u76ae\uff0c\u8c03\u6599\u4e0b\u9505\uff01\n\ud83d\udd25 4.3 customInit\uff1a\u5927\u706b\u6536\u6c41\uff0c\u51c6\u5907\u51fa\u9505\uff01\n\ud83d\udc68\u200d\ud83c\udf73 5. \u4e0a\u9505\u524d\u68c0\u67e5\uff1aBean 'braisedPork' \u5df2\u521d\u59cb\u5316\u5b8c\u6210\uff01\n\ud83d\udcf8 \u7ed9\u7ea2\u70e7\u8089\u52a0\u4e2a\u2018\u7f8e\u98df\u6ee4\u955c\u2019\uff08AOP \u4ee3\u7406\uff09\uff01\n\ud83c\udf7d\ufe0f  6. \u4e0a\u83dc\u5566\uff01\n\ud83c\udf73 \u6b63\u5728\u70f9\u996a\uff1a\u5bb6\u5e38\u7ea2\u70e7\u8089\uff0c\u7528\u7684\u9171\u6cb9\u662f\uff1a\u8001\u62bd\n\ud83e\uddfd 7.1 @PreDestroy\uff1a\u5173\u706b\uff01\n\ud83e\uddfd 7.2 DisposableBean.destroy\uff1a\u6d17\u9505\uff01\n\ud83e\uddfd 7.3 customDestroy\uff1a\u64e6\u7076\u53f0\uff0c\u6253\u626b\u53a8\u623f\uff01<\/code><\/pre>\n\n\n\n
          \n\n\n\n
          \u2705 \u603b\u7ed3\uff1a\u4ee3\u7801 + \u6bd4\u55bb \u5bf9\u7167\u8868<\/h2>\n\n\n\n
          \u9636\u6bb5<\/th>\u6bd4\u55bb<\/th>\u4ee3\u7801\u5173\u952e\u70b9<\/th><\/tr><\/thead>
          1. \u5b9e\u4f8b\u5316<\/td>\u4e70\u8089<\/td>new BraisedPork()<\/code><\/td><\/tr>
          2. \u5c5e\u6027\u8d4b\u503c<\/td>\u814c\u8089<\/td>@Autowired<\/code>\u3001setter<\/td><\/tr>
          3. \u521d\u59cb\u5316\u524d<\/td>\u5207\u8089\u524d\u68c0\u67e5<\/td>BeanPostProcessor.postProcessBeforeInitialization<\/code><\/td><\/tr>
          4. \u521d\u59cb\u5316<\/td>\u5f00\u706b\u505a\u83dc<\/td>@PostConstruct<\/code>\u3001afterPropertiesSet<\/code>\u3001init-method<\/code><\/td><\/tr>
          5. \u521d\u59cb\u5316\u540e<\/td>\u52a0\u6ee4\u955c\/\u5305\u88c5<\/td>BeanPostProcessor.postProcessAfterInitialization<\/code>\uff08AOP\uff09<\/td><\/tr>
          6. \u4f7f\u7528<\/td>\u4e0a\u83dc<\/td>getBean().cook()<\/code><\/td><\/tr>
          7. \u9500\u6bc1<\/td>\u6d17\u7897<\/td>@PreDestroy<\/code>\u3001destroy<\/code>\u3001destroy-method<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"
          \ud83c\udf73 Spring Bean \u751f\u547d\u5468\u671f\u5168\u89e3\u6790\uff1a\u7528\u201c\u505a\u7ea2\u70e7\u8089\u201d\u8bb2\u900f\u6bcf\u4e00\u4e2a\u9636\u6bb5 \u4f5c\u8005\uff1a\u8d6b\u82f1\u5e74\u5173\u952e\u8bcd\uff1aSpring B […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[52,53],"class_list":["post-356","post","type-post","status-publish","format-standard","hentry","category-daily","tag-spring","tag-daily"],"_links":{"self":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts\/356","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/comments?post=356"}],"version-history":[{"count":2,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts\/356\/revisions"}],"predecessor-version":[{"id":359,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/posts\/356\/revisions\/359"}],"wp:attachment":[{"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/media?parent=356"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/categories?post=356"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/heyingnian.com\/index.php\/wp-json\/wp\/v2\/tags?post=356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}