Bean? ???? ???? ???? Bean? ??? ?? ??? ?????. setBeanName() ?? ? ?? ??? ??? ?????.

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   setBeanName() Bean? ?? ?? : ??? ??? ?? ?? ?????? ???? ? ??????. Bean? ?? ? ?? ??? Bean? ????? (?? ??? ????? ???? ??). @PostConstruct ?? InitializingBean.afterPropertiesSet() : ??? ?? ?? Spring? Bean? ? ????? ?????. ???? Spring? ???? ???? ?????.

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   : ? ?? ? ?? ??? ??? ????. ??? ??? ?? ( ?? ).

   ???? ?? ?? ? ?? ?? (? : ??? ??, ? ?? ?? ??? : ?? ). setBeanName()

   ??? ? ?? ???? <the> ??? ?? ?????? ???? ???? ?????.<pre class='brush:php;toolbar:false;'>// Spring容器初始化（偽代碼） public class BeanFactory { public Object createBean(Class&lt;?&gt; beanClass, String beanName) { // 步驟1：實(shí)例化bean Object bean = instantiateBean(beanClass); // 步驟2：檢查bean是否實(shí)現(xiàn)了BeanNameAware if (bean instanceof BeanNameAware) { // 步驟3：調(diào)用setBeanName()并傳遞bean的名稱 ((BeanNameAware) bean).setBeanName(beanName); } // 步驟4：繼續(xù)進(jìn)行依賴注入和其他生命周期回調(diào) injectDependencies(bean); initializeBean(bean); return bean; } }</pre> <hr /> <h3> ?? ? <?? ??> </h3> bean ?? <?? ??> <h4> <<> Bean ?? <?? ??> </h4> <主 主> ?? ?? ???? <主 主> <pre class='brush:php;toolbar:false;'>@Configuration public class AppConfig { @Bean(name = &quot;tenantA-dataSource&quot;) public TenantDataSource tenantADataSource() { return new TenantDataSource(); } }</pre> <輸> ?? <輸 輸> <h4> </h4> <用 用> <<> ?? ?? <?? ??> <pre class='brush:php;toolbar:false;'>import org.springframework.beans.factory.BeanNameAware; public class TenantDataSource implements BeanNameAware { private String tenantName; private String databaseUrl; @Override public void setBeanName(String beanName) { // 從bean名稱中提取租戶名稱 if (beanName.contains(&quot;-&quot;)) { this.tenantName = beanName.split(&quot;-&quot;)[0]; } else { throw new IllegalArgumentException(&quot;無效的bean命名約定。預(yù)期格式：&lt;tenantname&gt;-dataSource&quot;); } // 根據(jù)租戶名稱動(dòng)態(tài)分配數(shù)據(jù)庫URL this.databaseUrl = &quot;jdbc:mysql://localhost:3306/&quot; + tenantName + &quot;_db&quot;; System.out.println(&quot;setBeanName() called for: &quot; + beanName + &quot;, resolved tenant: &quot; + tenantName); } public void connect() { System.out.println(&quot;Connecting to database: &quot; + databaseUrl); } }</pre> <h4> <態(tài)> <<> ?? ?? </h4> : <?? ??> <of> ?? ??? ???? ??? (? : ???? ??? ??)? ??????. <pre class='brush:php;toolbar:false;'>import org.springframework.context.ApplicationContext; import org.springframework.context.annotation.AnnotationConfigApplicationContext; public class Main { public static void main(String[] args) { // 初始化Spring上下文 ApplicationContext context = new AnnotationConfigApplicationContext(AppConfig.class); // 獲取bean TenantDataSource tenantA = (TenantDataSource) context.getBean(&quot;tenantA-dataSource&quot;); // 使用bean tenantA.connect(); } }</pre> <h4> </h4> <試 試> <<> ??? <pre class="brush:php;toolbar:false">&lt;code&gt;setBeanName() called for: tenantA-dataSource, resolved tenant: tenantA Connecting to database: jdbc:mysql://localhost:3306/tenantA_db&lt;/code&gt;</pre> : <ging> ? ??? ?? ??? ?? ?? ???? ??????. <hr> <h3> <code>setBeanName() ????? ??? : ? ??? ?? Bean ??? ???? ??????.

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