{"id":735,"date":"2023-05-28T02:11:04","date_gmt":"2023-05-27T18:11:04","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/?p=735"},"modified":"2023-05-28T02:11:04","modified_gmt":"2023-05-27T18:11:04","slug":"spring-bean%e7%9a%84%e4%bd%9c%e7%94%a8%e5%9f%9f%e7%9b%b8%e5%85%b3%e7%9f%a5%e8%af%86%e7%82%b9","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/spring-boot\/spring-bean%e7%9a%84%e4%bd%9c%e7%94%a8%e5%9f%9f%e7%9b%b8%e5%85%b3%e7%9f%a5%e8%af%86%e7%82%b9\/","title":{"rendered":"Spring Bean\u7684\u4f5c\u7528\u57df\u76f8\u5173\u77e5\u8bc6\u70b9"},"content":{"rendered":"
\n
<\/mp-common-profile><\/section>\n
\n

<\/span>\u524d\u8a00<\/span><\/span><\/h3>\n

\u4eca\u5929\u5206\u4eab\u4e00\u4e0bspring bean\u7684\u4f5c\u7528\u57df\uff0c\u7406\u89e3bean\u7684\u4f5c\u7528\u57df\u80fd\u591f\u5728\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u907f\u514d\u4e00\u4e9b\u95ee\u9898\uff0cbean\u7684\u4f5c\u7528\u57df\u4e5f\u662fspring bean\u521b\u5efa\u8fc7\u7a0b\u4e2d\u4e00\u4e2a\u91cd\u8981\u7684\u70b9\u3002<\/p>\n

<\/span>Spring bean\u7684\u4f5c\u7528\u57df\u7c7b\u578b<\/span><\/span><\/h3>\n
    \n
  • \n
    \n

    singleton\uff08\u5355\u4f8b\u6a21\u5f0f\uff09\uff1a\u5728\u6574\u4e2a\u5e94\u7528\u7a0b\u5e8f\u7684\u751f\u547d\u5468\u671f\u4e2d\uff0c\u53ea\u521b\u5efa\u4e00\u4e2aBean\u5b9e\u4f8b\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6240\u6709\u7684Bean\u90fd\u662f\u5355\u4f8b\u6a21\u5f0f\u3002<\/p>\n<\/section>\n<\/li>\n

  • \n
    \n

    prototype\uff08\u539f\u578b\u6a21\u5f0f\uff09\uff1a\u6bcf\u6b21\u8bf7\u6c42Bean\u65f6\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b\u3002<\/p>\n<\/section>\n<\/li>\n

  • \n
    \n

    request\uff08\u8bf7\u6c42\u6a21\u5f0f\uff09\uff1a\u6bcf\u6b21HTTP\u8bf7\u6c42\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b\uff0c\u8be5\u4f5c\u7528\u57df\u4ec5\u9002\u7528\u4e8eWeb\u5e94\u7528\u7a0b\u5e8f\u7684Spring MVC\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<\/section>\n<\/li>\n

  • \n
    \n

    session\uff08\u4f1a\u8bdd\u6a21\u5f0f\uff09\uff1a\u6bcf\u4e2a\u7528\u6237\u4f1a\u8bdd\u90fd\u6709\u4e00\u4e2aBean\u5b9e\u4f8b\uff0c\u8be5\u4f5c\u7528\u57df\u4ec5\u9002\u7528\u4e8eWeb\u5e94\u7528\u7a0b\u5e8f\u7684Spring MVC\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<\/section>\n<\/li>\n

  • \n
    \n

    globalSession\uff08\u5168\u5c40\u4f1a\u8bdd\u6a21\u5f0f\uff09\uff1a\u7528\u4e8ePortlet\u5e94\u7528\u7a0b\u5e8f\uff0c\u4e00\u4e2a\u5168\u5c40\u4f1a\u8bdd\u6709\u4e00\u4e2aBean\u5b9e\u4f8b\u3002<\/p>\n<\/section>\n<\/li>\n

  • \n
    \n

    application\uff08\u5e94\u7528\u7a0b\u5e8f\u6a21\u5f0f\uff09\uff1a\u5728Web\u5e94\u7528\u7a0b\u5e8f\u4e0a\u4e0b\u6587\u4e2d\uff0c\u53ea\u521b\u5efa\u4e00\u4e2aBean\u5b9e\u4f8b\u3002<\/p>\n<\/section>\n<\/li>\n<\/ul>\n

    \u4ece\u4e0a\u9762\u6211\u4eec\u80fd\u770b\u51faspring\u6709\u5f88\u591a\u79cd\u4f5c\u7528\u57df\uff0c\u4e0d\u8fc7\u5728\u5b9e\u9645\u4f7f\u7528\u4e2d\uff0c\u6211\u4eec\u57fa\u672c\u90fd\u4f7f\u7528\u5355\u4f8bbean\uff0c\u8fd9\u4e5f\u662fspring bean\u7684\u9ed8\u8ba4\u4f5c\u7528\u57df\uff0c\u5355\u4f8bbean\u80fd\u63d0\u9ad8\u6027\u80fd\uff0c\u56e0\u4e3a\u5168\u5c40\u53ea\u5b58\u5728\u4e00\u4e2abean\u5b9e\u4f8b\uff0c\u800c\u591a\u4f8bbean\u5219\u6bcf\u6b21\u8bf7\u6c42\u90fd\u9700\u8981\u521b\u5efabean\u5b9e\u4f8b\uff0c\u5f53\u5e76\u53d1\u6bd4\u8f83\u5927\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u6bd4\u8f83\u5f71\u54cd\u6027\u80fd\uff0c\u6240\u4ee5\u8fd9\u65f6\u5019\u5c31\u9700\u8981\u4f7f\u7528\u5355\u4f8bbean\uff0c\u4f46\u662f\u5355\u4f8bbean\u53ef\u80fd\u4f1a\u5b58\u5728\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\uff0c\u5f53bean\u4e2d\u5b58\u5728\u53ef\u53d8\u7684\u6210\u5458\u53d8\u91cf\u65f6\uff0c\u5c31\u4f1a\u5b58\u5728\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\uff0c\u800c\u591a\u4f8bbean\u56e0\u4e3a\u6bcf\u6b21\u90fd\u4f1a\u521b\u5efa\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u6240\u4ee5\u4e0d\u5b58\u5728bean\u5171\u4eab\uff0c\u5c31\u4e0d\u5b58\u5728\u7ebf\u7a0b\u5b89\u5168\u95ee\u9898\u3002<\/p>\n

    <\/span>\u4f7f\u7528\u4f5c\u7528\u57df<\/span><\/span><\/h3>\n

    \u73b0\u5728\u6211\u4eec\u57fa\u672c\u90fd\u662f\u4f7f\u7528SpringBoot\uff0c\u90fd\u662f\u57fa\u4e8e\u6ce8\u89e3\u5f00\u53d1\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u6ce8\u89e3@Scope\u8bbe\u7f6ebean\u7684\u4f5c\u7528\u57df\uff0c\u53ef\u4ee5\u6807\u6ce8\u5728\u7c7b\u4e0a\u548c\u65b9\u6cd5\u4e0a\u3002<\/p>\n

    <\/span>\u6807\u6ce8\u65b9\u6cd5<\/span><\/span><\/h4>\n

    \u5f53\u6211\u4eec\u4f7f\u7528@Bean\u5b9a\u4e49Bean\u7684\u65f6\u5019\uff0c\u8bbe\u7f6e\u4f5c\u7528\u57df\u53ef\u4ee5\u76f4\u63a5\u5728\u65b9\u6cd5\u4e0a\u9762\u4f7f\u7528@Scope\u3002<\/p>\n

    <\/span>@Component<\/span>
    @Scope<\/span>(\"prototype\"<\/span>)
    public<\/span> class<\/span> ScopeBean<\/span> <\/span>{

    }
    <\/code><\/pre>\n
    <\/span>\u83b7\u53d6bean\u548c\u521b\u5efabean<\/span><\/span><\/h3>\n
    \u5982\u679c\u662f\u5355\u4f8bbean\uff0c\u5728spring\u5bb9\u5668\u542f\u52a8\u7684\u65f6\u5019\u4f1a\u5c06Bean\u6ce8\u518c\u8fdbIOC\u5bb9\u5668\u4e2d\uff0c\u5982\u679c\u662f\u591a\u4f8bbean\uff0c\u5219\u4e0d\u6ce8\u518c\u8fdbIOC\u5bb9\u5668\u4e2d\u3002<\/p>\n
    bean\u5728\u5b9e\u4f8b\u5316\u524d\u4f1a\u628abean\u7684\u57fa\u7840\u4fe1\u606f\u7ec4\u88c5\u6210BeanDefinition\uff0c\u7136\u540e\u4fdd\u5b58\u5230BeanFactory\u4e2d\uff0c\u5982\u679c\u662f\u5355\u4f8b\u7684bean\uff0c\u5219\u4f1a\u7ee7\u7eed\u5bf9bean\u5904\u7406\u540e\u5c06bean\u6ce8\u518c\u5230IOC\u5bb9\u5668\u4e2d\uff0c\u5982\u679c\u662f\u591a\u4f8bbean\uff0c\u5219\u4e0d\u6ce8\u518c\u8fdb\uff0c\u5f53\u4eceIOC\u5bb9\u5668\u4e2d\u83b7\u53d6bean\u65f6\uff0c\u5982\u679c\u662f\u5355\u4f8b\u5219\u4eceIOC\u5bb9\u5668\u4e2d\u83b7\u53d6\u5df2\u7ecf\u521b\u5efa\u597d\u7684bean\uff0c\u5982\u679c\u662f\u591a\u4f8b\uff0c\u5219\u4eceBeanFactory\u4e2d\u83b7\u53d6bean\u7684\u5b9a\u4e49\u4fe1\u606fBeanDefinition\uff0c\u7136\u540e\u91cd\u590d\u548c\u5355\u4f8bbean\u4e00\u6837\u7684\u6b65\u9aa4\u521b\u5efabean\uff0c\u53ea\u662f\u521b\u5efa\u540e\u5b83\u4e0d\u4f1a\u4fdd\u5b58\u8fdbIOC\u5bb9\u5668\uff0c\u800c\u662f\u76f4\u63a5\u8fd4\u56de\u3002<\/p>\n
    <\/span>\u4f5c\u7528\u57df\u548c\u61d2\u52a0\u8f7d<\/span><\/span><\/h3>\n
    \u5982\u679cbean\u8bbe\u7f6e\u4e3a\u61d2\u52a0\u8f7d(Lazy)\u548c\u5355\u4f8bbean\uff0c\u90a3\u4e48bean\u5728spring\u542f\u52a8\u65f6\u4e0d\u4f1a\u6ce8\u518c\u8fdb\u5bb9\u5668\u4e2d\uff0c\u800c\u662f\u7b49\u7b2c\u4e00\u6b21\u83b7\u53d6bean\u7684\u65f6\u5019\u5728\u521b\u5efabean\uff0c\u540e\u9762\u83b7\u53d6bean\u7684\u65f6\u5019\u518d\u4eceIOC\u5bb9\u5668\u4e2d\u83b7\u53d6\uff0c\u5982\u679c\u8bbe\u7f6e\u4e3a\u591a\u4f8bbean\uff0c\u90a3\u4e48\u61d2\u52a0\u8f7d\u5176\u5b9e\u662f\u6ca1\u7528\u7684\u3002<\/p>\n
    <\/span>\u6e90\u7801\u89e3\u6790<\/span><\/span><\/h3>\n
    \u6e90\u7801\u6bd4\u8f83\u7b80\u5355\uff0c\u5176\u5b9e\u5c31\u662f\u5224\u65adbean\u7684\u7c7b\u578b\uff0c\u7136\u540e\u518d\u8fdb\u5165\u4e0d\u540c\u7684\u903b\u8f91\u8fdb\u884c\u5904\u7406\uff0c\u5728AbstractBeanFactory\u4e2d\uff0c\u901a\u8fc7doGetBean()\u65b9\u6cd5\u83b7\u53d6bean\u3002<\/p>\n
    <\/span>\u5224\u65adbean\u662f\u5426\u5b58\u5728\u5bb9\u5668\u4e2d<\/span><\/span><\/h4>\n
    \u4e0b\u56fe\u901a\u8fc7getSingleton()\u65b9\u6cd5\u4ecesingletonObjects\u4e2d\u83b7\u53d6bean\uff0c\u5982\u679c\u83b7\u53d6\u5230\u76f4\u63a5\u8fd4\u56de\uff0c\u4ee3\u8868bean\u5df2\u7ecf\u521b\u5efa\u8fc7\u52d2\uff0c\u5df2\u7ecf\u5b58\u5728\u4e0eIOC\u5bb9\u5668\u4e2d\uff0csingletonObjects\u5c31\u662f\u6574\u4e2aspring\u4e2d\u88c5bean\u5b9e\u4f8b\u7684\u5bb9\u5668\uff0c\u4ed6\u5c31\u662f\u4e00\u4e2aMap\uff0cspring\u6574\u4e2abean\u7684\u521b\u5efa\u8fc7\u7a0b\u76ee\u7684\u5c31\u662f\u628abean\u653e\u8fdb\u5b83\u91cc\u9762\uff0c\u6240\u4ee5spring\u7b80\u5355\u5f97\u4e0d\u884c\uff0c\u4f46\u662f\u66f4\u590d\u6742\u5f97\u4e0d\u884c<\/code>\u3002<\/p>\n