\u533a\u522b\u5728\u4e8e\uff0cBeanFactory \u662f Spring \u6846\u67b6\u7684\u6838\u5fc3\u63a5\u53e3\uff0c\u7528\u4e8e\u7ba1\u7406\u548c\u63d0\u4f9b Bean \u5b9e\u4f8b\uff0c\u800c FactoryBean \u662f\u4e00\u4e2a\u7279\u6b8a\u7684 Bean\uff0c\u7528\u4e8e\u521b\u5efa\u548c\u7ba1\u7406\u5176\u4ed6 Bean \u7684\u5b9e\u4f8b\u3002FactoryBean \u5728 Bean \u7684\u521b\u5efa\u8fc7\u7a0b\u4e2d\u63d0\u4f9b\u66f4\u591a\u7684\u81ea\u5b9a\u4e49\u80fd\u529b\uff0c\u5141\u8bb8\u8fdb\u884c\u989d\u5916\u7684\u903b\u8f91\u5904\u7406\u3002<\/p>\n
\u53ef\u80fd\u6709\u7684\u5c0f\u4f19\u4f34\u770b\u7684\u8fd8\u4e0d\u662f\u5f88\u6e05\u695a\uff0c\u6211\u4eec\u518d\u6765\u8be6\u7ec6\u770b\u4e0b\u3002<\/p>\n
1. BeanFactory<\/h2>\n
BeanFactory \u770b\u540d\u5b57\u5c31\u77e5\u9053\u8fd9\u662f\u4e00\u4e2a Bean \u5de5\u5382\uff0c\u5c0f\u4f19\u4f34\u4eec\u77e5\u9053\uff0cSpring IoC \u5bb9\u5668\u5e2e\u6211\u4eec\u5b8c\u6210\u4e86 Bean \u7684\u521b\u5efa\u3001\u7ba1\u7406\u7b49\u64cd\u4f5c\uff0c\u90a3\u4e48\u8fd9\u4e9b\u64cd\u4f5c\u90fd\u79bb\u4e0d\u5f00 BeanFactory\u3002<\/p>\n
\u6211\u4eec\u6765\u7b80\u5355\u770b\u4e0b BeanFactory \u7684\u4ee3\u7801\uff1a<\/p>\n
public interface BeanFactory {\n String FACTORY_BEAN_PREFIX = "&";\n Object getBean(String name) throws BeansException;\n <T> T getBean(String name, Class<T> requiredType) throws BeansException;\n Object getBean(String name, Object... args) throws BeansException;\n <T> T getBean(Class<T> requiredType) throws BeansException;\n <T> T getBean(Class<T> requiredType, Object... args) throws BeansException;\n <T> ObjectProvider<T> getBeanProvider(Class<T> requiredType);\n <T> ObjectProvider<T> getBeanProvider(ResolvableType requiredType);\n boolean containsBean(String name);\n boolean isSingleton(String name) throws NoSuchBeanDefinitionException;\n boolean isPrototype(String name) throws NoSuchBeanDefinitionException;\n boolean isTypeMatch(String name, ResolvableType typeToMatch) throws NoSuchBeanDefinitionException;\n boolean isTypeMatch(String name, Class<?> typeToMatch) throws NoSuchBeanDefinitionException;\n @Nullable\n Class<?> getType(String name) throws NoSuchBeanDefinitionException;\n @Nullable\n Class<?> getType(String name, boolean allowFactoryBeanInit) throws NoSuchBeanDefinitionException;\n String[] getAliases(String name);\n\n}<\/code><\/pre>\n\u8fd9\u4e9b\u65b9\u6cd5\u57fa\u672c\u4e0a\u90fd\u89c1\u540d\u77e5\u4e49\uff1a<\/p>\n
\n- FACTORY\/_BEAN\/_PREFIX\uff1a\u8fd9\u4e2a\u53d8\u91cf\u5176\u5b9e\u662f\u8bf4\uff0c\u5982\u679c\u5f53\u524d Bean \u4e0d\u662f\u50cf User\u3001Book \u8fd9\u79cd\u666e\u901a Bean\uff0c\u800c\u662f\u4e00\u4e2a FactoryBean\uff0c\u5c31\u7ed9\u8fd9\u4e2a Bean \u540d\u5b57\u52a0\u4e00\u4e2a
&<\/code> \u524d\u7f00\uff0c\u8fd9\u4e2a\u6211\u5728\u7b2c\u4e8c\u5c0f\u8282\u548c\u5c0f\u4f19\u4f34\u4eec\u6f14\u793a\u3002<\/li>\n- getBean\uff1a\u8fd9\u4e2a\u65b9\u6cd5\u5c31\u662f\u6839\u636e Bean \u7684\u540d\u5b57\u3001\u7c7b\u578b\u7b49\u53bb\u67e5\u8be2 Bean\u3002<\/li>\n
- getBeanProvider\uff1a\u8fd9\u4e2a\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u4e00\u4e2a ObjectProvider\uff0cObjectProvider \u662f Spring \u6846\u67b6\u4e2d\u7684\u4e00\u4e2a\u63a5\u53e3\uff0c\u7528\u4e8e\u83b7\u53d6 Bean \u5bf9\u8c61\u7684\u5b9e\u4f8b\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u5ef6\u8fdf\u52a0\u8f7d Bean \u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u5728\u9700\u8981\u65f6\u52a8\u6001\u5730\u83b7\u53d6 Bean \u5b9e\u4f8b\uff08\u61d2\u52a0\u8f7d\uff09\u3002<\/li>\n
- containsBean\uff1a\u5224\u65ad\u662f\u5426\u5305\u542b\u67d0\u4e2a Bean\u3002<\/li>\n
- isSingleton\uff1a\u5224\u65ad\u67d0\u4e2a Bean \u662f\u5426\u662f\u5355\u4f8b\u7684\u3002<\/li>\n
- isPrototype\uff1a\u5224\u65ad\u67d0\u4e2a Bean \u662f\u5426\u662f\u591a\u4f8b\u7684\u3002<\/li>\n
- isTypeMatch\uff1a\u5224\u65ad\u67d0\u4e00\u4e2a Bean \u7684\u7c7b\u578b\u662f\u5426\u662f\u7ed9\u5b9a\u7c7b\u578b\u3002<\/li>\n
- getType\uff1a\u83b7\u53d6 Bean \u7684\u7c7b\u578b\u3002<\/li>\n
- getAliases\uff1a\u83b7\u53d6 Bean \u7684\u522b\u540d\u3002<\/li>\n<\/ul>\n
\u53ef\u4ee5\u770b\u5230\uff0c\u5f88\u591a\u90fd\u662f\u5927\u5bb6\u65e5\u5e38\u5f00\u53d1\u4e2d\u5e38\u89c1\u5e38\u7528\u7684\u65b9\u6cd5\u3002<\/p>\n
\u5f88\u591a\u5c0f\u4f19\u4f34\u521a\u5f00\u59cb\u63a5\u89e6 Spring \u7684\u65f6\u5019\uff0c\u90fd\u4f1a\u7528\u5230\u4e00\u4e2a\u5bf9\u8c61 ClassPathXmlApplicationContext<\/code>\uff0c\u8fd9\u5176\u5b9e\u5c31\u662f BeanFactory \u7684\u4e00\u4e2a\u5b50\u7c7b\u3002\u6211\u4eec\u6765\u770b\u4e0b BeanFactory \u7684\u7ee7\u627f\u56fe\uff1a<\/p>\n![\"\"](\"https:\/\/segmentfault.com\/img\/remote\/1460000043977755\" "\\"\\"")
<\/p>\n
\u7ee7\u627f\u7c7b\u6bd4\u8f83\u591a\uff0c\u6211\u8bf4\u51e0\u4e2a\u5927\u5bb6\u53ef\u80fd\u6bd4\u8f83\u719f\u6089\u7684\uff1a<\/p>\n
\n- ClassPathXmlApplicationContext\uff1a\u8fd9\u4e2a\u662f Spring \u5bb9\u5668\u542f\u52a8\u65f6\uff0c\u4ece\u5f53\u524d\u7c7b\u8def\u5f84\u4e0b\u53bb\u52a0\u8f7d XML \u914d\u7f6e\u6587\u4ef6\uff0c\u53c2\u6570\u5c31\u662f classpath \u4e0b XML \u7684\u6587\u4ef6\u8def\u5f84\u3002<\/li>\n
- FileSystemXmlApplicationContext\uff1a\u8fd9\u4e2a\u662f Spring \u5bb9\u5668\u542f\u52a8\u65f6\uff0c\u4ece\u6587\u4ef6\u7cfb\u7edf\u4e2d\u53bb\u52a0\u8f7d XML \u914d\u7f6e\u6587\u4ef6\uff0c\u53c2\u6570\u4e00\u4e2a\u7edd\u5bf9\u8def\u5f84\u3002<\/li>\n
- AnnotationConfigApplicationContext\uff1a\u8fd9\u4e2a\u662f\u5982\u679c\u6211\u4eec\u4f7f\u7528 Java \u4ee3\u7801\u53bb\u505a Spring \u5bb9\u5668\u7684\u914d\u7f6e\u7684\u8bdd\uff0c\u901a\u8fc7\u8fd9\u4e2a\u914d\u7f6e\u7c7b\u53bb\u52a0\u8f7d Java \u914d\u7f6e\u7c7b\u3002<\/li>\n
- DefaultListableBeanFactory\uff1a\u8fd9\u4e2a\u9ed8\u8ba4\u5b9e\u73b0\u4e86 ListableBeanFactory \u548c BeanDefinitionRegistry \u63a5\u53e3\uff0c\u662f\u4e00\u4e2a\u6bd4\u8f83\u6210\u719f\u7684 BeanFactory\u3002<\/li>\n<\/ol>\n
\u597d\u5566\uff0c\u8fd9\u5c31\u662f BeanFactory \u7684\u7279\u70b9\uff0c\u5927\u5bb6\u660e\u767d\u4e86\u5427\uff5e<\/p>\n
2. FactoryBean<\/h2>\n2.1 \u5206\u6790<\/h3>\n
FactoryBean \u5176\u5b9e\u5f88\u591a\u5c0f\u4f19\u4f34\u53ef\u80fd\u90fd\u89c1\u8fc7\uff0c\u53ea\u662f\u53ef\u80fd\u6ca1\u53bb\u603b\u7ed3\u5f52\u7eb3\u3002\u6211\u7ed9\u5c0f\u4f19\u4f34\u4eec\u4e3e\u51e0\u4e2a\u4f8b\u5b50\u3002<\/p>\n
\u5728 SSM \u9879\u76ee\u4e2d\uff0c\u5982\u679c\u6211\u4eec\u8981\u914d\u7f6e MyBatis \u5230\u9879\u76ee\u4e2d\uff0c\u4e00\u822c\u9700\u8981\u914d\u7f6e\u4e0b\u9762\u8fd9\u4e2a Bean\uff1a<\/p>\n
<bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactoryBean">\n <property name="dataSource" ref="dataSource"\/>\n <property name="typeAliasesPackage" value="org.javaboy.shirodemo.model"\/>\n <property name="mapperLocations">\n <list>\n <value>classpath*:org\/javaboy\/shirodemo\/mapper\/*.xml<\/value>\n <\/list>\n <\/property>\n<\/bean><\/code><\/pre>\n\u6211\u4eec\u5728\u914d\u7f6e Shiro \u7684\u65f6\u5019\uff0c\u4e00\u822c\u90fd\u8981\u914d\u7f6e\u5982\u4e0b Bean\uff1a<\/p>\n
<bean class="org.apache.shiro.spring.web.ShiroFilterFactoryBean" id="shiroFilter">\n <property name="securityManager" ref="securityManager"\/>\n <property name="loginUrl" value="\/login"\/>\n <property name="successUrl" value="\/index"\/>\n <property name="unauthorizedUrl" value="\/unauthorizedUrl"\/>\n <property name="filterChainDefinitions">\n <value>\n \/index=anon\n \/doLogin=anon\n \/hello=user\n \/**=authc\n <\/value>\n <\/property>\n<\/bean><\/code><\/pre>\n\u5982\u679c\u6211\u4eec\u524d\u7aef\u4f20\u9012\u7684\u53c2\u6570\u662f key-value \u683c\u5f0f\uff0c\u5e76\u4e14\u6709\u4e00\u4e2a\u65e5\u671f\uff0c\u90a3\u4e48\u5c0f\u4f19\u4f34\u4eec\u77e5\u9053\uff0c\u670d\u52a1\u7aef SpringMVC \u9ed8\u8ba4\u65e0\u6cd5\u5904\u7406\u8fd9\u4e2a\u65e5\u671f\uff0c\u9700\u8981\u914d\u7f6e\u4e00\u4e2a\u65e5\u671f\u8f6c\u6362\u5668\uff0c\u4e00\u822c\u6211\u4eec\u5728 Spring \u5bb9\u5668\u4e2d\u6dfb\u52a0\u5982\u4e0b Bean\uff08\u5bf9\u8fd9\u4e2a\u4e0d\u719f\u6089\u7684\u5c0f\u4f19\u4f34\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u3010\u6c5f\u5357\u4e00\u70b9\u96e8\u3011\u540e\u53f0\u56de\u590d ssm\uff0c\u6709\u677e\u54e5\u5f55\u5236\u7684\u514d\u8d39\u5165\u95e8\u89c6\u9891\uff09\uff1a<\/p>\n
<bean class="org.springframework.format.support.FormattingConversionServiceFactoryBean" id="conversionService">\n <property name="converters">\n <set>\n <ref bean="myDateConverter"\/>\n <\/set>\n <\/property>\n<\/bean>\n<mvc:annotation-driven conversion-service="conversionService"\/><\/code><\/pre>\n\u5c0f\u4f19\u4f34\u4eec\u89c2\u5bdf\u4e0a\u9762\u4e09\u4e2a Bean \u6709\u4e00\u4e2a\u5171\u540c\u7684\u7279\u70b9\uff0c\u90a3\u5c31\u662f Bean \u7684\u540d\u5b57\u90fd\u662f xxxFactoryBean\u3002<\/strong><\/p>\n\u4e3a\u4ec0\u4e48\u8981\u7528 xxxFactoryBean \u800c\u4e0d\u76f4\u63a5\u628a\u9700\u8981\u7684 Bean \u6ce8\u5165\u5230 Spring \u5bb9\u5668\u4e2d\u53bb\u5462\uff1f\u4ee5 MyBatis \u4e3a\u4f8b\uff1a<\/p>\n
\u624b\u52a8\u914d\u7f6e\u8fc7 MyBatis \u7684\u5c0f\u4f19\u4f34\u5e94\u8be5\u90fd\u77e5\u9053\uff0cMyBatis \u6709\u4e24\u4e2a\u91cd\u8981\u7684\u7c7b\uff0c\u4e00\u4e2a\u662f SqlSessionFactory\uff0c\u8fd8\u6709\u4e00\u4e2a\u662f SqlSession\uff0c\u901a\u8fc7 SqlSessionFactory \u53ef\u4ee5\u83b7\u53d6\u5230\u4e00\u4e2a SqlSession\u3002\u4f46\u662f\u4e0d\u77e5\u9053\u5c0f\u4f19\u4f34\u4eec\u662f\u5426\u8fd8\u8bb0\u5f97\u914d\u7f6e\u4ee3\u7801\uff0c\u624b\u52a8\u914d\u7f6e\u4ee3\u7801\u5982\u4e0b\uff08\u5bf9\u8fd9\u4e2a\u4e0d\u719f\u6089\u7684\u5c0f\u4f19\u4f34\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u3010\u6c5f\u5357\u4e00\u70b9\u96e8\u3011\u540e\u53f0\u56de\u590d ssm\uff0c\u6709\u677e\u54e5\u5f55\u5236\u7684\u514d\u8d39\u5165\u95e8\u89c6\u9891\uff09\uff1a<\/p>\n
public class SqlSessionFactoryUtils {\n private static SqlSessionFactory SQLSESSIONFACTORY = null;\n public static SqlSessionFactory getInstance() {\n if (SQLSESSIONFACTORY == null) {\n try {\n SQLSESSIONFACTORY = new SqlSessionFactoryBuilder().build(Resources.getResourceAsStream("mybatis-config.xml"));\n } catch (IOException e) {\n e.printStackTrace();\n }\n }\n return SQLSESSIONFACTORY;\n }\n}\npublic class Main {\n public static void main(String[] args) {\n SqlSessionFactory factory = SqlSessionFactoryUtils.getInstance();\n SqlSession sqlSession = factory.openSession();\n List<User> list = sqlSession.selectList("org.javaboy.mybatis01.mapper.UserMapper.getAllUser");\n for (User user : list) {\n System.out.println("user = " + user);\n }\n sqlSession.close();\n }\n}<\/code><\/pre>\n\u5c0f\u4f19\u4f34\u4eec\u770b\u5230\uff0c\u65e0\u8bba\u662f SqlSessionFactory \u8fd8\u662f SqlSession\uff0c\u90fd\u4e0d\u662f\u6b63\u7ecf new \u51fa\u6765\u7684\uff0c\u5176\u5b9e\u8fd9\u4e24\u4e2a\u90fd\u662f\u63a5\u53e3\uff0c\u663e\u7136\u4e0d\u53ef\u80fd new \u51fa\u6765\uff0c\u524d\u8005\u901a\u8fc7\u5efa\u9020\u8005\u6a21\u5f0f\u53bb\u914d\u7f6e\u5404\u79cd\u5c5e\u6027\uff0c\u6700\u540e\u751f\u6210\u4e00\u4e2a SqlSessionFactory \u7684\u5b9e\u4f8b\uff0c\u540e\u8005\u5219\u901a\u8fc7\u524d\u8005\u8fd9\u4e2a\u5de5\u5382\u53bb\u751f\u6210\uff0c\u6700\u7ec8\u62ff\u5230\u7684\u90fd\u662f\u8fd9\u4e24\u4e2a\u63a5\u53e3\u7684\u5b50\u7c7b\u7684\u5bf9\u8c61\u3002<\/p>\n
\u6240\u4ee5\uff0c\u5bf9\u4e8e SqlSessionFactory \u548c SqlSession \u5c31\u6ca1\u6cd5\u5728 Spring \u5bb9\u5668\u4e2d\u76f4\u63a5\u8fdb\u884c\u914d\u7f6e\uff0c\u90a3\u4e48\u5bf9\u4e8e\u8fd9\u6837\u7684 Bean\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7 xxxFactoryBean \u6765\u8fdb\u884c\u914d\u7f6e\u3002<\/p>\n
\u6211\u4eec\u6765\u770b\u4e0b SqlSessionFactoryBean \u7c7b\uff0c\u6e90\u7801\u5f88\u957f\uff0c\u6211\u6311\u4e86\u91cd\u8981\u7684\u51fa\u6765\uff1a<\/p>\n
public class SqlSessionFactoryBean implements FactoryBean<SqlSessionFactory>, InitializingBean, ApplicationListener<ApplicationEvent> {\n\n private SqlSessionFactory sqlSessionFactory;\n\n @Override\n public SqlSessionFactory getObject() throws Exception {\n if (this.sqlSessionFactory == null) {\n afterPropertiesSet();\n }\n\n return this.sqlSessionFactory;\n }\n @Override\n public Class<? extends SqlSessionFactory> getObjectType() {\n return this.sqlSessionFactory == null ? SqlSessionFactory.class : this.sqlSessionFactory.getClass();\n }\n @Override\n public boolean isSingleton() {\n return true;\n }\n}<\/code><\/pre>\n\u5927\u5bb6\u770b\u4e00\u4e0b\uff0cSqlSessionFactoryBean \u9700\u8981\u5b9e\u73b0 FactoryBean \u63a5\u53e3\uff0c\u5e76\u4e14\u5728\u5b9e\u73b0\u63a5\u53e3\u7684\u65f6\u5019\u6307\u5b9a\u6cdb\u578b\u662f SqlSessionFactory\uff0c\u4e5f\u5c31\u662f SqlSessionFactoryBean \u6700\u7ec8\u4ea7\u51fa\u7684 Bean \u662f SqlSessionFactory\u3002\u5b9e\u73b0\u4e86 FactoryBean \u63a5\u53e3\u4e4b\u540e\uff0c\u5c31\u9700\u8981\u5b9e\u73b0\u63a5\u53e3\u4e2d\u7684\u4e09\u4e2a\u65b9\u6cd5\uff1a<\/p>\n
\n- getObject\uff1a\u8fd9\u4e2a\u65b9\u6cd5\u8fd4\u56de\u7684\u5bf9\u8c61\uff0c\u5c31\u662f\u771f\u6b63\u8981\u6ce8\u518c\u5230 Spring \u5bb9\u5668\u4e2d\u7684\u5bf9\u8c61\uff0c\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u6309\u7167\u5404\u79cd\u65b9\u5f0f\u5bf9 Bean \u8fdb\u884c\u5404\u79cd\u914d\u7f6e\u4e86\u3002<\/li>\n
- getObjectType\uff1a\u8fd9\u4e2a\u65b9\u6cd5\u8fd4\u56de\u6ce8\u518c\u5230 Spring \u5bb9\u5668\u4e2d\u7684\u5bf9\u8c61\u7c7b\u578b\u3002<\/li>\n
- isSingleton\uff1a\u8fd9\u4e2a\u65b9\u6cd5\u7528\u6765\u8fd4\u56de\u6ce8\u518c\u5230 Spring \u5bb9\u5668\u4e2d\u7684 Bean \u662f\u5426\u662f\u5355\u4f8b\u7684\u3002<\/li>\n<\/ul>\n
\u8fd9\u5c31\u662f FactoryBean \u7684\u7279\u70b9\uff0c\u7531\u4e8e\u67d0\u4e00\u4e2a Bean \u7684\u521d\u59cb\u5316\u8fc7\u4e8e\u590d\u6742\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u901a\u8fc7 FactoryBean \u6765\u5e2e\u52a9\u6ce8\u518c\u5230 Spring \u5bb9\u5668\u4e2d\u53bb\u3002<\/p>\n
2.2 \u5b9e\u8df5<\/h3>\n
\u677e\u54e5\u518d\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u7ed9\u5c0f\u4f19\u4f34\u4eec\u4f53\u9a8c\u4e00\u628a FactoryBean\u3002<\/p>\n
\u5047\u8bbe\u6211\u6709\u5982\u4e0b\u7c7b\uff1a<\/p>\n
public class Author {\n\n private String name;\n private Integer age;\n\n private Author() {\n }\n\n public static Author init(String name, Integer age) {\n Author author = new Author();\n author.setAge(age);\n author.setName(name);\n return author;\n }\n \/\/\u7701\u7565 getter\/setter\/toString\n}<\/code><\/pre>\n\u8fd9\u4e2a\u7c7b\u7684\u7279\u70b9\u5c31\u662f\u6784\u9020\u65b9\u6cd5\u662f\u79c1\u6709\u7684\uff0c\u4f60\u6ca1\u6cd5\u4ece\u5916\u9762\u53bb new\uff0c\u73b0\u5728\u6211\u60f3\u5c06\u8fd9\u4e2a\u7c7b\u7684\u5bf9\u8c61\u6ce8\u518c\u5230 Spring \u5bb9\u5668\u4e2d\uff0c\u90a3\u4e48\u6211\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a AuthorFactoryBean\uff1a<\/p>\n
public class AuthorFactoryBean implements FactoryBean<Author> {\n @Override\n public Author getObject() throws Exception {\n return Author.init("javaboy", 99);\n }\n\n @Override\n public Class<?> getObjectType() {\n return Author.class;\n }\n\n @Override\n public boolean isSingleton() {\n return true;\n }\n}<\/code><\/pre>\n\u7136\u540e\u5728 Spring \u5bb9\u5668\u4e2d\u914d\u7f6e AuthorFactoryBean \u5373\u53ef\uff1a<\/p>\n
<bean class="org.javaboy.bean.AuthorFactoryBean" id="author"\/><\/code><\/pre>\n\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u53ef\u4ee5\u4ece\u5bb9\u5668\u4e2d\u53bb\u83b7\u53d6 Author \u5bf9\u8c61\u4e86\uff0c\u4f46\u662f\u8981\u6ce8\u610f\uff0c\u901a\u8fc7 author \u8fd9\u4e2a\u540d\u5b57\u62ff\u5230\u7684\u662f Author \u5bf9\u8c61\uff0c\u800c\u4e0d\u662f AuthorFactoryBean \u5bf9\u8c61\uff0c\u5982\u679c\u60f3\u8981\u83b7\u53d6\u5230 AuthorFactoryBean \u5bf9\u8c61\uff0c\u90a3\u4e48\u8981\u901a\u8fc7 &author<\/code> \u8fd9\u4e2a\u540d\u5b57\u53bb\u83b7\u53d6\uff08\u56de\u987e\u7b2c\u4e00\u5c0f\u8282\u6240\u8bb2\u5185\u5bb9\uff09\u3002<\/p>\npublic class Main {\n public static void main(String[] args) {\n ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("applicationContext.xml");\n Object author = ctx.getBean("author");\n Object authorFactoryBean = ctx.getBean("&author");\n System.out.println("author.getClass() = " + author.getClass());\n System.out.println("authorFactoryBean.getClass() = " + authorFactoryBean.getClass());\n }\n}<\/code><\/pre>\n\u6765\u770b\u4e0b\u6700\u7ec8\u8fd0\u884c\u7ed3\u679c\uff1a<\/p>\n
![\"\"](\"https:\/\/segmentfault.com\/img\/remote\/1460000043977756\" "\\"\\"")
<\/p>\n
\u8ddf\u6211\u4eec\u6240\u60f3\u7684\u4e00\u81f4\u5427\uff5e<\/p>\n
3. \u5c0f\u7ed3<\/h2>\n
\u7ecf\u8fc7\u524d\u9762\u7684\u4ecb\u7ecd\uff0c\u76f8\u4fe1\u5c0f\u4f19\u4f34\u4eec\u5df2\u7ecf\u80fd\u591f\u533a\u5206 BeanFactory \u548c FactoryBean \u4e86\uff0c\u518d\u6765\u56de\u987e\u4e00\u4e0b\u672c\u6587\u5f00\u5934\u7684\u5185\u5bb9\uff1a<\/p>\n
\n- BeanFactory \u662f Spring \u6846\u67b6\u7684\u6838\u5fc3\u63a5\u53e3\u4e4b\u4e00\uff0c\u7528\u4e8e\u7ba1\u7406\u548c\u83b7\u53d6\u5e94\u7528\u7a0b\u5e8f\u4e2d\u7684 Bean \u5b9e\u4f8b\u3002\u5b83\u662f\u4e00\u4e2a\u5de5\u5382\u6a21\u5f0f\u7684\u5b9e\u73b0\uff0c\u8d1f\u8d23\u521b\u5efa\u3001\u914d\u7f6e\u548c\u7ba1\u7406 Bean \u5bf9\u8c61\u3002BeanFactory \u662f Spring IoC \u5bb9\u5668\u7684\u57fa\u7840\uff0c\u5b83\u53ef\u4ee5\u4ece\u914d\u7f6e\u5143\u6570\u636e\uff08\u5982 XML \u6587\u4ef6\uff09\u4e2d\u8bfb\u53d6 Bean \u7684\u5b9a\u4e49\uff0c\u5e76\u5728\u9700\u8981\u65f6\u5b9e\u4f8b\u5316\u548c\u63d0\u4f9b\u8fd9\u4e9b Bean\u3002<\/li>\n
- FactoryBean \u662f\u4e00\u4e2a\u7279\u6b8a\u7684 Bean\uff0c\u5b83\u662f\u4e00\u4e2a\u5de5\u5382\u5bf9\u8c61\uff0c\u7528\u4e8e\u521b\u5efa\u548c\u7ba1\u7406\u5176\u4ed6 Bean \u7684\u5b9e\u4f8b\u3002FactoryBean \u63a5\u53e3\u5b9a\u4e49\u4e86\u4e00\u79cd\u521b\u5efa Bean \u7684\u65b9\u5f0f\uff0c\u5b83\u5141\u8bb8\u5f00\u53d1\u4eba\u5458\u5728 Bean \u7684\u521b\u5efa\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u66f4\u591a\u7684\u81ea\u5b9a\u4e49\u64cd\u4f5c\u3002\u901a\u8fc7\u5b9e\u73b0 FactoryBean \u63a5\u53e3\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u521b\u5efa\u590d\u6742\u7684 Bean \u5b9e\u4f8b\uff0c\u6216\u8005\u5728 Bean \u5b9e\u4f8b\u5316\u4e4b\u524d\u8fdb\u884c\u4e00\u4e9b\u989d\u5916\u7684\u903b\u8f91\u5904\u7406\u3002<\/li>\n<\/ul>\n
\u533a\u522b\u5728\u4e8e\uff0cBeanFactory \u662f Spring \u6846\u67b6\u7684\u6838\u5fc3\u63a5\u53e3\uff0c\u7528\u4e8e\u7ba1\u7406\u548c\u63d0\u4f9b Bean \u5b9e\u4f8b\uff0c\u800c FactoryBean \u662f\u4e00\u4e2a\u7279\u6b8a\u7684 Bean\uff0c\u7528\u4e8e\u521b\u5efa\u548c\u7ba1\u7406\u5176\u4ed6 Bean \u7684\u5b9e\u4f8b\u3002FactoryBean \u5728 Bean \u7684\u521b\u5efa\u8fc7\u7a0b\u4e2d\u63d0\u4f9b\u66f4\u591a\u7684\u81ea\u5b9a\u4e49\u80fd\u529b\uff0c\u5141\u8bb8\u8fdb\u884c\u989d\u5916\u7684\u903b\u8f91\u5904\u7406\u3002<\/p>\n