{"id":1140,"date":"2024-09-04T10:17:53","date_gmt":"2024-09-04T02:17:53","guid":{"rendered":"http:\/\/ericw.top\/?p=1140"},"modified":"2024-09-04T10:17:53","modified_gmt":"2024-09-04T02:17:53","slug":"bean","status":"publish","type":"post","link":"http:\/\/ericw.top\/?p=1140","title":{"rendered":"bean"},"content":{"rendered":"\n

bean\u914d\u7f6e<\/h2>\n\n\n\n

bean\u57fa\u672c\u914d\u7f6e<\/h3>\n\n\n\n
<bean id="" class=""\/><\/code><\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
bean\u6807\u7b7e\u7684id\u548cclass\u5c5e\u6027\u7684\u4f7f\u7528<\/strong><\/p>\n\n\n\n
bean\u522b\u540d\u914d\u7f6e<\/h3>\n\n\n\n
bean\u914d\u7f6e\u522b\u540d\u64cd\u4f5c\u6b65\u9aa4\uff1a<\/strong><\/p>\n\n\n\n
1\u3001\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\uff0c\u914d\u7f6e\u522b\u540d<\/p>\n\n\n\n
<?xml version="1.0" encoding="UTF-8"?>\n<beans xmlns="http:\/\/www.springframework.org\/schema\/beans"\n       xmlns:xsi="http:\/\/www.w3.org\/2001\/XMLSchema-instance"\n       xsi:schemaLocation="http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans.xsd">\n\n    <!--name:\u4e3abean\u6307\u5b9a\u522b\u540d\uff0c\u522b\u540d\u53ef\u4ee5\u6709\u591a\u4e2a\uff0c\u4f7f\u7528\u9017\u53f7\uff0c\u5206\u53f7\uff0c\u7a7a\u683c\u8fdb\u884c\u5206\u9694-->\n    <bean id="bookService" name="service service4 bookEbi" class="com.itheima.service.impl.BookServiceImpl">\n        <property name="bookDao" ref="bookDao"\/>\n    <\/bean>\n\n    <!--scope\uff1a\u4e3abean\u8bbe\u7f6e\u4f5c\u7528\u8303\u56f4\uff0c\u53ef\u9009\u503c\u4e3a\u5355\u4f8bsingloton\uff0c\u975e\u5355\u4f8bprototype-->\n    <bean id="bookDao" name="dao" class="com.itheima.dao.impl.BookDaoImpl"\/>\n<\/beans><\/code><\/pre>\n\n\n\n
2\u3001\u6839\u636e\u540d\u79f0\u5bb9\u5668\u4e2d\u83b7\u53d6bean\u5bf9\u8c61<\/p>\n\n\n\n
public class AppForName {\n    public static void main(String[] args) {\n        ApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");\n        \/\/\u6b64\u5904\u6839\u636ebean\u6807\u7b7e\u7684id\u5c5e\u6027\u548cname\u5c5e\u6027\u7684\u4efb\u610f\u4e00\u4e2a\u503c\u6765\u83b7\u53d6bean\u5bf9\u8c61\n        BookService bookService = (BookService) ctx.getBean("service4");\n        bookService.save();\n    }\n}<\/code><\/pre>\n\n\n\n
3\u3001\u8fd0\u884c\u7a0b\u5e8f<\/p>\n\n\n\n
\u6d4b\u8bd5\u7ed3\u679c\u6b63\u5e38\uff0c\u5219\u914d\u7f6e\u6210\u529f<\/p>\n\n\n\n
\u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n\n\n\n
    \n
  • bean\u4f9d\u8d56\u6ce8\u5165\u7684ref\u5c5e\u6027\u6307\u5b9abean\uff0c\u5fc5\u987b\u5728\u5bb9\u5668\u4e2d\u662f\u5b58\u5728\u7684<\/li>\n\n\n\n
  • \u83b7\u53d6bean\u65e0\u8bba\u662f\u901a\u8fc7id\u8fd8\u662fname\u83b7\u53d6\uff0c\u5982\u679c\u65e0\u6cd5\u83b7\u53d6\u5230\uff0c\u5c06\u629b\u51fa\u5f02\u5e38NoSuchBeanDefinitionException<\/code><\/li>\n<\/ul>\n\n\n\n
    <\/p>\n\n\n\n
    bean\u4f5c\u7528\u8303\u56f4\u914d\u7f6e<\/h3>\n\n\n\n
    Spring\u9ed8\u8ba4\u521b\u9020\u7684\u7684bean\u662f\u5355\u4f8b\u7684<\/p>\n\n\n\n
    \u6211\u4eec\u53ef\u4ee5\u7ed9\u4ed6\u8bbe\u7f6e\u5c5e\u6027 scope <\/p>\n\n\n\n
    \u8fd9\u4e2a\u5c5e\u6027\u7684\u4f5c\u7528\u662f\u4fee\u6539bean\u7684\u4f5c\u7528\u8303\u56f4
    \u6709\u4e24\u4e2a\u5c5e\u6027<\/p>\n\n\n\n
      \n
    • scope="prototype"<\/code>  \u975e\u5355\u4f8b\u6a21\u5f0f<\/li>\n\n\n\n
    • scope="singleton"<\/code>  \u5355\u4f8b\u6a21\u5f0f\uff08\u9ed8\u8ba4\u6a21\u5f0f\uff09<\/li>\n<\/ul>\n\n\n\n
      \"\"<\/figure>\n\n\n\n
      bean\u4f5c\u7528\u8303\u56f4\u8bf4\u660e<\/strong><\/p>\n\n\n\n
        \n
      • \u4e3a\u4ec0\u4e48bean\u9ed8\u8ba4\u4e3a\u5355\u4f8b\u7684\uff1f
        spring\u7ba1\u7406\u7684\u5c31\u662f\u590d\u7528\u7684\u5bf9\u8c61\uff0c\u6548\u7387\u66f4\u9ad8<\/li>\n\n\n\n
      • \u9002\u5408\u4ea4\u7ed9\u5bb9\u5668\u7ba1\u7406\u7684bean\uff1f\n
          \n
        • \u8868\u73b0\u5c42\u5bf9\u8c61<\/li>\n\n\n\n
        • \u4e1a\u52a1\u5c42\u5bf9\u8c61<\/li>\n\n\n\n
        • \u6570\u636e\u5c42\u5bf9\u8c61<\/li>\n\n\n\n
        • \u5de5\u5177\u5bf9\u8c61<\/li>\n<\/ul>\n<\/li>\n\n\n\n
        • \u4e0d\u9002\u5408\u4ea4\u7ed9\u5bb9\u5668\u7ba1\u7406\u7684bean\uff1f\n
            \n
          • \u5c01\u88c5\u5b9e\u4f53\u7684\u57df\u5bf9\u8c61<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n
            <\/p>\n\n\n\n
            Bean\u7684\u5b9e\u4f8b\u5316\u2014\u2014\u6784\u9020\u65b9\u6cd5<\/h2>\n\n\n\n
            bean\u672c\u8d28\u4e0a\u5c31\u662f\u5bf9\u8c61<\/strong>\uff0c\u521b\u5efabean\u4f7f\u7528\u6784\u9020\u65b9\u6cd5<\/strong>\u5b8c\u6210<\/p>\n\n\n\n
            \u5b9e\u4f8b\u5316bean\u7684\u4e09\u79cd\u65b9\u5f0f\uff0c\u6784\u9020\u65b9\u6cd5<\/strong>,\u9759\u6001\u5de5\u5382<\/strong>\u548c\u5b9e\u4f8b\u5de5\u5382<\/strong><\/p>\n\n\n\n
            \u6784\u9020\u65b9\u6cd5\u5b9e\u4f8b\u5316<\/h3>\n\n\n\n
            1\u3001\u9996\u5148\u5728XML\u6587\u4ef6\u4e2d\u5c06\u7c7b\u914d\u7f6e\u5230Spring\u5bb9\u5668\u4e2d<\/p>\n\n\n\n
            2\u3001\u7f16\u5199\u8fd0\u884c\u7a0b\u5e8f<\/p>\n\n\n\n
            3\u3001\u5728\u7c7b\u4e2d\u63d0\u4f9b\u6784\u9020\u51fd\u6570\u6d4b\u8bd5\uff08\u65e0\u53c2\u6784\u9020\u51fd\u6570\uff09<\/p>\n\n\n\n
            public class BookDaoImpl implements BookDao {\n\n\/\/    \u6784\u5efa\u4e00\u4e2a \u65e0\u53c2\u6784\u9020\u51fd\u6570\n    public BookDaoImpl() {\n        System.out.println("book dao constructor is running ....");\n    }\n\n    public void save() {\n        System.out.println("book dao save ...");\n    }\n\n}<\/code><\/pre>\n\n\n\n
            \u9759\u6001\u5de5\u5382\u5b9e\u4f8b\u5316<\/h3>\n\n\n\n
            1\u3001\u521b\u5efa\u5de5\u5382\u7c7b \u5e76\u63d0\u4f9b\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5<\/p>\n\n\n\n
            \/\/\u9759\u6001\u5de5\u5382\u521b\u5efa\u5bf9\u8c61\npublic class OrderDaoFactory {\n    public static OrderDao getOrderDao(){\n        return new OrderDaoImpl();\n    }\n}<\/code><\/pre>\n\n\n\n
            2\u3001\u7f16\u5199\u8fd0\u884c\u7c7b\uff0c\u5e76\u5728\u7c7b\u4e2d\u901a\u8fc7\u5de5\u5382\u83b7\u53d6\u5bf9\u8c61<\/p>\n\n\n\n
            public class AppForInstanceOrder {\n    public static void main(String[] args) {\n        \/\/\u901a\u8fc7\u9759\u6001\u5de5\u5382\u521b\u5efa\u5bf9\u8c61\n        OrderDao orderDao = OrderDaoFactory.getOrderDao();\n        orderDao.save();\n    }\n}<\/code><\/pre>\n\n\n\n
            3\u3001\u8fd0\u884c\uff0c\u67e5\u770b\u7ed3\u679c<\/p>\n\n\n\n
            \u9759\u6001\u5de5\u5382\u5b9e\u4f8b\u5316:<\/p>\n\n\n\n
            \u5728spring\u7684\u914d\u7f6e\u6587\u4ef6application.properties\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u5185\u5bb9:<\/p>\n\n\n\n
            <bean id="orderDao" class="com.itheima.factory.OrderDaoFactory" factory-method="getOrderDao"\/><\/code><\/pre>\n\n\n\n
            class:\u5de5\u5382\u7c7b\u7684\u7c7b\u5168\u540d<\/p>\n\n\n\n
            factory-mehod:\u5177\u4f53\u5de5\u5382\u7c7b\u4e2d\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u6cd5\u540d<\/p>\n\n\n\n
            \"\"<\/figure>\n\n\n\n
            \u7136\u540e\u5728\u8fd0\u884c\u7c7b\u91cc\u9762\uff0c\u4f7f\u7528IoC\u5bb9\u5668\u4e2d\u83b7\u53d6bean<\/p>\n\n\n\n
            \u7136\u540e\u8fd0\u884c<\/p>\n\n\n\n
            \u9759\u6001\u5de5\u5382\u5b9e\u4f8b\u5316  \u4e00\u822c\u662f\u7528\u6765\u517c\u5bb9\u65e9\u671f\u7684\u4e00\u4e9b\u8001\u7cfb\u7edf  \u4e86\u89e3\u5373\u53ef<\/p>\n\n\n\n
            \u5b9e\u4f8b\u5de5\u5382\u4e0eFactoryBean<\/h3>\n\n\n\n
            1\u3001\u521b\u5efa\u5de5\u5382\u7c7b\uff0c\u5e76\u63d0\u4f9b\u4e00\u4e2a\u666e\u901a\u65b9\u6cd5<\/strong><\/p>\n\n\n\n
            public class UserDaoFactory {\n    public UserDao getUserDao(){\n        return new UserDaoImpl();\n    }\n}<\/code><\/pre>\n\n\n\n
            2\u3001\u7f16\u5199\u8fd0\u884c\u7c7b\uff0c\u5728\u7c7b\u4e2d\u901a\u8fc7\u5de5\u5382\u83b7\u53d6\u5bf9\u8c61<\/p>\n\n\n\n
            public class AppForInstanceUser {\n    public static void main(String[] args) {\n        \/\/\u521b\u5efa\u5b9e\u4f8b\u5de5\u5382\u5bf9\u8c61\n        UserDaoFactory userDaoFactory = new UserDaoFactory();\n        \/\/\u901a\u8fc7\u5b9e\u4f8b\u5de5\u5382\u5bf9\u8c61\u521b\u5efa\u5bf9\u8c61\n        UserDao userDao = userDaoFactory.getUserDao();\n        userDao.save();\n}<\/code><\/pre>\n\n\n\n
            3\u3001\u8fd0\u884c\u542f\u52a8\uff0c\u67e5\u770b\u7ed3\u679c<\/p>\n\n\n\n
            \u5b9e\u4f8b\u5de5\u7a0b\u5b9e\u4f8b\u5316<\/strong><\/h4>\n\n\n\n
            \u64cd\u4f5c\u6b65\u9aa4\uff1a<\/strong><\/p>\n\n\n\n
            1\u3001\u5728spring\u7684\u914d\u7f6e\u6587\u4ef6\u4e2d\u6dfb\u52a0\u5185\u5bb9<\/p>\n\n\n\n
            <bean id="userFactory" class="com.itheima.factory.UserDaoFactory"\/>\n<bean id="userDao" factory-method="getUserDao" factory-bean="userFactory"\/><\/code><\/pre>\n\n\n\n
            2\u3001\u5b9e\u4f8b\u5316\u5de5\u5382\u8fd0\u884c\u7684\u987a\u5e8f<\/strong>\u662f:
              1.\u521b\u5efa\u5b9e\u4f8b\u5316\u5de5\u5382<\/strong>\u5bf9\u8c61,\u5bf9\u5e94\u7684\u662f\u7b2c\u4e00\u884c\u914d\u7f6e<\/strong>
              2.\u8c03\u7528\u5bf9\u8c61\u4e2d\u7684\u65b9\u6cd5\u6765\u521b\u5efabean<\/strong>\uff0c\u5bf9\u5e94\u7684\u662f\u7b2c\u4e8c\u884c\u914d\u7f6e<\/strong>
                factory-bean<\/code>:\u5de5\u5382\u7684\u5b9e\u4f8b\u5bf9\u8c61<\/strong>
                factory-method<\/code>:\u5de5\u5382\u5bf9\u8c61\u4e2d\u7684\u5177\u4f53\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u6cd5\u540d<\/strong>
                factory-mehod<\/code>:\u5177\u4f53\u5de5\u5382\u7c7b\u4e2d\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u6cd5\u540d<\/strong>
            \u5bf9\u5e94\u5173\u7cfb\u5982\u4e0b:<\/p>\n\n\n\n
            \"\"<\/figure>\n\n\n\n
            3\u3001\u5728\u8fd0\u884c\u7c7b\u4e2d\u4f7f\u7528IoC\u5bb9\u5668\u83b7\u53d6bean\u7684\u65b9\u6cd5\u8fdb\u884c\u6d4b\u8bd5<\/p>\n\n\n\n
            public class AppForInstanceUser {\n    public static void main(String[] args) {\n        ApplicationContext ctx = new \n            ClassPathXmlApplicationContext("applicationContext.xml");\n\/\/    \u83b7\u53d6bean\u65b9\u6cd5\n        UserDao userDao = (UserDao) ctx.getBean("userDao");\n        userDao.save();\n    }\n}<\/code><\/pre>\n\n\n\n
            4\u3001\u8fd0\u884c\u67e5\u770b\u7ed3\u679c<\/p>\n\n\n\n
            FactoryBean<\/h4>\n\n\n\n
            \u4f7f\u7528\u6b65\u9aa4\uff1a<\/p>\n\n\n\n
            1\u3001\u521b\u5efa\u6309\u4e00\u4e2aFactoryBean\u7684\u7c7b\uff0c\u5b9e\u73b0FactoryBean\u63a5\u53e3\uff0c\u91cd\u5199\u63a5\u53e3\u65b9\u6cd5<\/p>\n\n\n\n
            public class UserDaoFactoryBean implements FactoryBean<UserDao> {\n    \/\/\u4ee3\u66ff\u539f\u59cb\u5b9e\u4f8b\u5de5\u5382\u4e2d\u521b\u5efa\u5bf9\u8c61\u7684\u65b9\u6cd5\n    public UserDao getObject() throws Exception {\n        return new UserDaoImpl();\n    }\n    \/\/\u8fd4\u56de\u6240\u521b\u5efa\u7c7b\u7684Class\u5bf9\u8c61\n    public Class<?> getObjectType() {\n        return UserDao.class;\n    }\n}<\/code><\/pre>\n\n\n\n
            2\u3001\u5728spring\u914d\u7f6e\u6587\u4ef6\u4e2d\u8fdb\u884c\u914d\u7f6e<\/p>\n\n\n\n
            <bean id="userDao" class="com.itheima.factory.UserDaoFactoryBean"\/><\/code><\/pre>\n\n\n\n
            3\u3001\u8fd0\u884c\u7c7b\u4e00\u6837\uff0c\u76f4\u63a5\u8fd0\u884c\uff0c\u67e5\u770b\u7ed3\u679c<\/p>\n\n\n\n
            bean\u7684\u751f\u547d\u5468\u671f<\/h2>\n\n\n\n
            bean\u7684\u751f\u547d\u5468\u671f\u8be6\u89e3<\/strong><\/p>\n\n\n\n
            1\u3001\u4ec0\u4e48\u662f\u751f\u547d\u5468\u671f
            \u4ece\u521b\u5efa\u5230\u6d88\u4ea1\u7684\u5b8c\u6574\u8fc7\u7a0b<\/strong>,\u4f8b\u5982\u4eba\u4ece\u51fa\u751f\u5230\u6b7b\u4ea1\u7684\u6574\u4e2a\u8fc7\u7a0b\u5c31\u662f\u4e00\u4e2a\u751f\u547d\u5468\u671f<\/p>\n\n\n\n
            2\u3001bean\u751f\u547d\u5468\u671f\u662f\u4ec0\u4e48
            bean\u5bf9\u8c61\u4ece\u521b\u5efa\u5230\u9500\u6bc1\u7684\u6574\u4f53\u8fc7\u7a0b<\/strong><\/p>\n\n\n\n
            3\u3001bean\u7684\u751f\u547d\u5468\u671f\u63a7\u5236\u662f\u4ec0\u4e48
            \u5728bean\u521b\u5efa\u540e\u5230\u9500\u6bc1\u524d<\/strong>\u505a\u4e00\u4e9b\u4e8b\u60c5<\/p>\n\n\n\n
            bean\u751f\u547d\u5468\u671f\u8bbe\u7f6e<\/h3>\n\n\n\n
            bean\u521b\u5efa\u4e4b\u540e\uff0c\u60f3\u8981\u6dfb\u52a0\u5185\u5bb9\uff0c\u6bd4\u5982\u7528\u6765\u521d\u59cb\u5316\u9700\u8981\u7528\u5230\u8d44\u6e90<\/strong><\/p>\n\n\n\n
            bean\u9500\u6bc1\u4e4b\u524d\uff0c\u60f3\u8981\u6dfb\u52a0\u5185\u5bb9\uff0c\u6bd4\u5982\u7528\u6765\u91ca\u653e\u7528\u5230\u7684\u8d44\u6e90<\/strong><\/p>\n\n\n\n
            <\/p>\n\n\n\n
            <\/p>\n","protected":false},"excerpt":{"rendered":"
            bean\u914d\u7f6e bean\u57fa\u672c\u914d\u7f6e bean\u6807\u7b7e\u7684id\u548cclass\u5c5e\u6027\u7684\u4f7f\u7528 bean\u522b\u540d\u914d\u7f6e bean\u914d\u7f6e\u522b\u540d\u64cd […]<\/p>\n","protected":false},"author":1,"featured_media":1141,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21,5],"tags":[],"_links":{"self":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/1140"}],"collection":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1140"}],"version-history":[{"count":3,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/1140\/revisions"}],"predecessor-version":[{"id":1356,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/1140\/revisions\/1356"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/media\/1141"}],"wp:attachment":[{"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1140"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}