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springboot 配置多源数据库出错？

springboot 配置多源数据库问题。 测试了一下springboot配置多源数据库，mysql和postgresql，yml配置如下： spring: datasource: dynamic: primary: mysql strict: false datasource: mysql: driver-class-name: com.mysql.cj.jdbc.Driver username: root password: root url: jdbc:mysql://*.*.*.*:3306/student?allowPublicKeyRetrieval=true&useSSL=false&useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT postgresql: url: jdbc:postgresql://localhost:5432/postgres username: postgres password: weixj5217 driverClassName: org.postgresql.Driver 运行程序，出现如下错误： …… 9:30:59:048] [INFO] -org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.prepareWebApplicationContext(ServletWebServerApplicationContext.java:292) - Root WebApplicationContext: initialization completed in 1080 ms [19:30:59:138] [INFO] -com.zaxxer.hikari.HikariDataSource.(HikariDataSource.java:80) - mysql -Starting... [19:31:21:237] [ERROR] -com.zaxxer.hikari.pool.HikariPool.throwPoolInitializationException(HikariPool.java:594) - mysql - Exception during pool initialization. com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.29.jar:8.0.29] at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.29.jar:8.0.29] at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:828) ~[mysql-connector-java-8.0.29.jar:8.0.29] at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:448) ~[mysql-connector-java-8.0.29.jar:8.0.29] …… 从错误中看，好像mysql启动错误。 说明一下： 单独连接mysql数据库（不是多源数据库），程序正常，不会出现上面的错误。 多次修改yml配置，还是不行。