javalangIllegalArgumentException dataSource or dataSourceClassName or jdbcUrl is required

The error message "java.lang.IllegalArgumentException: dataSource or dataSourceClassName or jdbcUrl is required" indicates that you are trying to establish a database connection in Java without providing the necessary information.

To fix this issue, you need to ensure that you provide either the dataSource, dataSourceClassName, or jdbcUrl parameter when creating a connection.

Here are some possible solutions:

1. If you are using a DataSource object to establish the connection, make sure you have initialized it correctly and passed it to the appropriate method. For example:

DataSource dataSource = new MyDataSource();
Connection connection = dataSource.getConnection();

2. If you are using the dataSourceClassName parameter, ensure that you have specified the correct class name for your database driver. For example:

String dataSourceClassName = "com.mysql.cj.jdbc.MysqlDataSource";

3. If you are using the jdbcUrl parameter, make sure you have provided the correct URL for your database connection. For example:

String jdbcUrl = "jdbc:mysql://localhost:3306/mydatabase";

4. Double-check that you have imported the necessary classes and packages for the database connection.

By providing the required information correctly, you should be able to establish a database connection without encountering the "dataSource or dataSourceClassName or jdbcUrl is required" error