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                該注解的作用是,排除自動注入數據源的配置,用 exclude 屬性進行排除指定的類,在springBoot中使用多數據源時,加上`@SpringBootApplication(exclude={DataSourceAutoConfiguration.calss})` > 原因是因為:SpringBoot里面只能存在單數據源,所以只能啟動一個服務,如果想啟動多個服務,需要在啟動配置類下添加 `(exclude={DataSourceAutoConfiguration.class})`,將客戶端/消費者的服務排除掉數據源,禁止SpringBoot自動注入數據源。這樣就可以成功啟動多服務了 `DataSourceAutoConfiguration.class` 會自動查找 `application.yml` 或者 `properties` 文件里的` spring.datasource.*`相關屬性并自動配置單數據源 DataSourceAutoConfiguration.class默認會幫我們自動配置單數據源,所以,如果想在項目中使用多數據源就需要排除它,手動指定多數據源。 ### 單數據源中 `application.yml`為 ``` spring: datasource: name: test url: jdbc:mysql:/127.0.0.1:3306/test?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF8 username: root password: root ``` ### 多數據源中 `application.yml`為 即在springBoot 中要加上 `@SpringBootApplication(exclude={DataSourceAutoConfiguration.calss})` ``` spring: datasource: default: name: test url: jdbc:mysql:/127.0.0.1:3306/test?serverTimezone=GMT%2B8&useUnicode=true&characterEncoding=UTF8 username: root password: root ```
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