使用MariaDB的SpringBoot：驱动程序尚未从服务器收到任何数据包

Question

我有一个MariaDB，当与续集Pro连接时，我使用此凭据，我可以连接

与我使用的SpringBoot一起使用

spring.datasource.url=jdbc:mysql://172.105.50.55:3306/pradera_db
spring.datasource.username=pradera_usr
spring.datasource.password=Mddejh847h$#@

但是我有这个错误：

Caused by: java.net.ConnectException: Connection refused (Connection refused)
    at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:400)
    at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:243)
    at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:225)
    at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:402)
    at java.base/java.net.Socket.connect(Socket.java:591)
    at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155)
    at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65)
    ... 81 common frames omitted
2020-05-31 12:30  [restartedMain] INFO  com.zaxxer.hikari.HikariDataSource - HikariPool-1 - Starting...
2020-05-31 12:30  [restartedMain] ERROR com.zaxxer.hikari.pool.HikariPool - HikariPool-1 - 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.

这是pom.xml中的依赖项：

<dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

Answer 1

尝试作为连接字符串：

spring.datasource.url=jdbc:mysql://172.105.50.55:3306/pradera_db?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC

pom.xml：

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>