Property 'sqlSessionFactory' or 'sqlSessionTemplate' are required

This error message typically occurs in a Spring application that uses MyBatis for database access. It means that either the 'sqlSessionFactory' bean or the 'sqlSessionTemplate' bean is missing from the Spring configuration file.

To fix this error, you need to add the missing bean to your Spring configuration file. Here's an example of how to configure the 'sqlSessionFactory' bean:

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
  <property name="configLocation" value="classpath:mybatis-config.xml" />
</bean>

In this example, the 'dataSource' property is set to the data source bean defined elsewhere in the configuration file, and the 'configLocation' property is set to the location of the MyBatis configuration file.

If you prefer to use the 'sqlSessionTemplate' bean instead of the 'sqlSessionFactory' bean, here's an example of how to configure it:

<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
  <constructor-arg ref="sqlSessionFactory" />
</bean>

In this example, the 'sqlSessionTemplate' bean is constructed with a reference to the 'sqlSessionFactory' bean. This allows the template to create and manage SQL sessions based on the session factory configuration.