{"id":12162,"date":"2023-11-28T22:45:34","date_gmt":"2023-11-28T14:45:34","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=12162"},"modified":"2023-12-11T15:37:45","modified_gmt":"2023-12-11T07:37:45","slug":"spring-zhong-na-xie-shi-zhong-yao-debean-sheng-min-2","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/spring-zhong-na-xie-shi-zhong-yao-debean-sheng-min-2\/","title":{"rendered":"Spring\u4e2d\u54ea\u4e9b\u662f\u91cd\u8981\u7684bean\u751f\u547d\u5468\u671f\u65b9\u6cd5\uff1f\u4f60\u80fd\u91cd\u8f7d\u5b83\u4eec\u5417\uff1f"},"content":{"rendered":"

\u5728Spring\u6846\u67b6\u4e2d\uff0cBean\u7684\u751f\u547d\u5468\u671f\u4e3b\u8981\u6d89\u53ca\u4ee5\u4e0b\u51e0\u4e2a\u91cd\u8981\u7684\u65b9\u6cd5\uff1a<\/p>\n

    \n
  1. \n\u5b9e\u4f8b\u5316Bean\uff08Instantiation\uff09\uff1a<\/strong><\/p>\n
      \n
    • \u5728\u5b9e\u4f8b\u5316Bean\u65f6\uff0c\u4f1a\u8c03\u7528\u6784\u9020\u51fd\u6570\u521b\u5efaBean\u7684\u5b9e\u4f8b\u3002\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0InstantiationAwareBeanPostProcessor<\/code>\u63a5\u53e3\u4e2d\u7684postProcessBeforeInstantiation<\/code>\u548cpostProcessAfterInstantiation<\/code>\u65b9\u6cd5\u6765\u5728\u5b9e\u4f8b\u5316\u8fc7\u7a0b\u4e2d\u4ecb\u5165\uff0c\u8fdb\u884c\u4e00\u4e9b\u5b9a\u5236\u5316\u7684\u5904\u7406\u3002<\/li>\n<\/ul>\n
      public class MyInstantiationAwareBeanPostProcessor implements InstantiationAwareBeanPostProcessor {\n\n    @Override\n    public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException {\n        \/\/ \u5728\u5b9e\u4f8b\u5316\u4e4b\u524d\u7684\u5b9a\u5236\u903b\u8f91\n        return null; \/\/ \u8fd4\u56denull\u8868\u793a\u4f7f\u7528\u9ed8\u8ba4\u7684\u5b9e\u4f8b\u5316\u903b\u8f91\n    }\n\n    @Override\n    public boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException {\n        \/\/ \u5728\u5b9e\u4f8b\u5316\u4e4b\u540e\u7684\u5b9a\u5236\u903b\u8f91\n        return true; \/\/ \u8fd4\u56detrue\u8868\u793a\u4f7f\u7528\u9ed8\u8ba4\u7684\u5c5e\u6027\u6ce8\u5165\u903b\u8f91\n    }\n}\n<\/code><\/pre>\n<\/li>\n
    • \n\u5c5e\u6027\u6ce8\u5165\uff08Populate Properties\uff09\uff1a<\/strong><\/p>\n
        \n
      • \u5728\u5b9e\u4f8b\u5316\u540e\uff0cSpring\u4f1a\u901a\u8fc7Bean\u7684setter\u65b9\u6cd5\u6216\u76f4\u63a5\u8bbf\u95ee\u5b57\u6bb5\uff08\u5982\u679c\u5b58\u5728\uff09\u6765\u8fdb\u884c\u5c5e\u6027\u6ce8\u5165\u3002\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0BeanPostProcessor<\/code>\u63a5\u53e3\u4e2d\u7684postProcessPropertyValues<\/code>\u65b9\u6cd5\u6765\u5728\u5c5e\u6027\u6ce8\u5165\u8fc7\u7a0b\u4e2d\u4ecb\u5165\uff0c\u8fdb\u884c\u4e00\u4e9b\u5b9a\u5236\u5316\u7684\u5904\u7406\u3002<\/li>\n<\/ul>\n
        public class MyBeanPostProcessor implements BeanPostProcessor {\n\n    @Override\n    public PropertyValues postProcessPropertyValues(PropertyValues pvs, PropertyDescriptor[] pds, Object bean, String beanName) throws BeansException {\n        \/\/ \u5728\u5c5e\u6027\u6ce8\u5165\u4e4b\u540e\u7684\u5b9a\u5236\u903b\u8f91\n        return pvs; \/\/ \u8fd4\u56de\u539f\u59cb\u7684PropertyValues\u8868\u793a\u4f7f\u7528\u9ed8\u8ba4\u7684\u5c5e\u6027\u6ce8\u5165\u903b\u8f91\n    }\n}\n<\/code><\/pre>\n<\/li>\n
      • \n\u521d\u59cb\u5316\uff08Initialization\uff09\uff1a<\/strong><\/p>\n
          \n
        • \u5728\u5c5e\u6027\u6ce8\u5165\u540e\uff0cSpring\u4f1a\u8c03\u7528Bean\u7684\u521d\u59cb\u5316\u65b9\u6cd5\u3002\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0InitializingBean<\/code>\u63a5\u53e3\u4e2d\u7684afterPropertiesSet<\/code>\u65b9\u6cd5\u6216\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u901a\u8fc7init-method<\/code>\u5c5e\u6027\u6765\u5b9a\u4e49\u521d\u59cb\u5316\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n
          public class MyBean implements InitializingBean {\n\n    @Override\n    public void afterPropertiesSet() throws Exception {\n        \/\/ \u521d\u59cb\u5316\u903b\u8f91\n    }\n}\n<\/code><\/pre>\n<\/li>\n
        • \n\u9500\u6bc1\uff08Destruction\uff09\uff1a<\/strong><\/p>\n
            \n
          • \u5728\u5bb9\u5668\u5173\u95ed\u6216\u8005\u5355\u4f8bBean\u88ab\u79fb\u9664\u65f6\uff0cSpring\u4f1a\u8c03\u7528Bean\u7684\u9500\u6bc1\u65b9\u6cd5\u3002\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0DisposableBean<\/code>\u63a5\u53e3\u4e2d\u7684destroy<\/code>\u65b9\u6cd5\u6216\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u901a\u8fc7destroy-method<\/code>\u5c5e\u6027\u6765\u5b9a\u4e49\u9500\u6bc1\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n
            public class MyBean implements DisposableBean {\n\n    @Override\n    public void destroy() throws Exception {\n        \/\/ \u9500\u6bc1\u903b\u8f91\n    }\n}\n<\/code><\/pre>\n<\/li>\n<\/ol>\n
            \u4e0a\u8ff0\u65b9\u6cd5\u90fd\u662fSpring Bean\u7684\u751f\u547d\u5468\u671f\u4e2d\u7684\u5173\u952e\u70b9\uff0c\u53ef\u4ee5\u901a\u8fc7\u5b9e\u73b0\u76f8\u5e94\u7684\u63a5\u53e3\u6216\u8005\u914d\u7f6e\u6765\u5b9a\u5236Bean\u7684\u751f\u547d\u5468\u671f\u3002\u6ce8\u610f\uff0c\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u901a\u5e38\u66f4\u63a8\u8350\u4f7f\u7528\u6ce8\u89e3\u65b9\u5f0f\uff08@PostConstruct<\/code>\u548c@PreDestroy<\/code>\uff09\u6216\u8005\u914d\u7f6e\u65b9\u5f0f\u6765\u5b9a\u4e49\u521d\u59cb\u5316\u548c\u9500\u6bc1\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u4eec\u66f4\u7075\u6d3b\u4e14\u4e0d\u4f9d\u8d56\u4e8eSpring\u7279\u5b9a\u7684\u63a5\u53e3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
            \u5728Spring\u6846\u67b6\u4e2d\uff0cBean\u7684\u751f\u547d\u5468\u671f\u4e3b\u8981\u6d89\u53ca\u4ee5\u4e0b\u51e0\u4e2a\u91cd\u8981\u7684\u65b9\u6cd5\uff1a \u5b9e\u4f8b\u5316Bean\uff08Instantiatio […]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[],"class_list":["post-12162","post","type-post","status-publish","format-standard","hentry","category-spring"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12162","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=12162"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12162\/revisions"}],"predecessor-version":[{"id":47862,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12162\/revisions\/47862"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=12162"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=12162"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=12162"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}