No qualifying bean of ‘javax.sql.Datasource’ available: expected at least 1 bean which

This error message indicates that Spring is unable to find a bean of type `javax.sql.DataSource` in the application context.

To resolve this issue, you need to make sure that you have configured a `DataSource` bean in your Spring configuration file or class. You can do this by adding the appropriate configuration for your data source, such as setting up a connection pool, defining the JDBC driver class and connection URL, and providing authentication details.

Here is an example of how you can define a simple `DataSource` bean in your Spring configuration file:

<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <property name="url" value="jdbc:mysql://localhost:3306/mydatabase" />
    <property name="username" value="myuser" />
    <property name="password" value="mypassword" />
</bean>

In this example, we are using the Apache Commons DBCP2 library to create a connection pool, and setting the driver class name, URL, username, and password properties for a MySQL database.

Make sure that you have added the appropriate dependencies to your project for the database driver and connection pool libraries that you are using.