How does MyBatis handle database connection exceptions?

There are several ways in which MyBatis deals with database connection exceptions.

1. Using an exception handler: In MyBatis, database connection exceptions can be handled by implementing the org.apache.ibatis.exceptions.ExceptionHandler interface. By implementing this interface, you can customize the exception handling logic, such as logging exception information and retrying the connection.
2. Set the connection timeout in the data source configuration: By setting the connection timeout in the data source configuration, you can prevent exceptions caused by database connection timeouts. By adjusting relevant parameters in the configuration file, you can control the connection timeout and ensure that connections are completed within a reasonable timeframe.
3. Using a connection pool: By utilizing a connection pool to manage database connections, you can effectively handle the lifecycle of connections and create new ones as needed. This helps manage connection resources efficiently and prevents connection issues caused by delays in releasing connections.
4. Configure reconnection mechanism: in MyBatis data source configuration, you can set up a mechanism for automatic reconnection in case of connection issues. By adjusting certain parameters, you can control the number of reconnection attempts and the time intervals between them to ensure timely reconnection in case of connection problems.

In summary, the key to handling database connection exceptions in MyBatis is to promptly catch and deal with them. This can be effectively done by using exception handlers, setting connection timeout, utilizing connection pools, and configuring reconnection mechanisms.