求助，mybatis 连接阿里云服务器的 mysql 数据库出现连接超时错误

java萌新一枚，之前一直是使用本地的 mysql 数据库，由于今天在服务器上搭建 nacos 集群，所以索性使用服务器上的 mysql 数据库，mysql 的版本是 5.7 的，使用的驱动是 8.0 的，数据源配置如下：

在使用查询操作时出现了如下错误：

2022-06-12 16:41:22.394  INFO 17452 --- [nio-8201-exec-3] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2022-06-12 16:41:44.463 ERROR 17452 --- [nio-8201-exec-3] 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.
    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.<init>(ConnectionImpl.java:448) ~[mysql-connector-java-8.0.29.jar:8.0.29]
    。。。
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: 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 sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_291]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_291]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_291]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_291]
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.29.jar:8.0.29]
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.29.jar:8.0.29]
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.29.jar:8.0.29]    
    。。。

Caused by: java.net.ConnectException: Connection timed out: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_291]
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:81) ~[na:1.8.0_291]
    。。。

2022-06-12 16:41:44.465 ERROR 17452 --- [nio-8201-exec-3] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: 
### Error querying database.  Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is 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.
### The error may exist in com/test/mapper/BorrowMapper.java (best guess)
### The error may involve com.test.mapper.BorrowMapper.getBorrowByUid
### The error occurred while executing a query
### Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection; nested exception is 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.] with root cause

java.net.ConnectException: Connection timed out: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method) ~[na:1.8.0_291]
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:81) ~[na:1.8.0_291]
    。。。

下面是 service 代码和 mapper 代码：

@Service
public class BorrowServiceImpl implements BorrowService {

    @Resource
    private BorrowMapper borrowMapper;

    @Resource
    private UserClient userClient;

    @Resource
    private BookClient bookClient;

    @Override
    public UserBorrowDetail getUserBorrowDetailByUid(int uid) {
        // 查询借阅信息
        List<Borrow> borrowList = borrowMapper.getBorrowByUid(uid);    // 报错信息定位到该位置
        // 通过 Feign 来进行远程调用
        User user = userClient.getUserById(uid);
        List<Book> bookList = borrowList
                .stream()
                .map(b -> bookClient.getBookById(b.getBid()))
                .collect(Collectors.toList());
        return new UserBorrowDetail(user, bookList);
    }
}

@Mapper
public interface BorrowMapper {

    @Select("select * from db_borrow where uid = #{uid}")
    List<Borrow> getBorrowByUid(int uid);

    @Select("select * from db_borrow where bid = #{bid}")
    List<Borrow> getBorrowByBid(int bid);

    @Select("select * from db_borrow where uid = #{uid} and bid = #{bid}")
    Borrow getBorrow(int uid, int bid);
}

希望有大佬能帮帮忙，不胜感激！！