How to get Spring/Gradle to recognize JdbcTemplate initialization - spring-boot

Question

I have created a small SpringBoot/Gradle REST controller application, but I am
having problems initializing a connection to a Postgresql database. My application
includes the following class that's used to access the database:
#Component
public class UserSettingDAO {
#Autowired
private JdbcTemplate jdbcTemplate;
#Autowired
private DataSource dataSource;
...
}
In the first version of the program, I included the following in /src/main/resources/application.properties:
spring.datasource.driver-class-name=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://...
spring.datasource.username=...
spring.datasource.password=...
In this version, my REST service successfully connected with the database. However,
for consistency with other projects in my group, I changed the initialization of
dataSource and jdbcTemplate as follows:
First, I removed those property
definitions above from application.properties. Next, I created an XML initialization file resources/resources_deployment1/spring-resource1.xml that included the
following:
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations" value="classpath:pdao_connection.properties"/>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${driverClassName}" />
<property name="url" value="${url}" />
<property name="username" value="${db.username}" />
<property name="password" value="${db.password}"/>
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<constructor-arg ref="dataSource"/>
</bean>
where the referenced file resources/resources_deployment1/pdao_connection.properties
contains the following:
driverClassName=org.postgresql.Driver
db.username=...
db.password=...
url=jdbc:postgresql://...
After this, when I then deployed my application (to Websphere Liberty) and hit my REST
service from Chrome, it failed with the following message:
Failed to auto-configure a DataSource: 'spring.datasource.url' is not specified and no embedded datasource could be auto-configured.
It seems like there is a break in the long chain of references so that Spring does
not have access to the required connection parameters. How can I fix this, while
keeping the deployment-specific parameters in a subfolder of resources? In
particular, how do I convince the build and runtime operations to look in the
resources/resources_deployment1 folder?

Answer 1

it required artifacts spring-jdbc and postgresql java connector inside your web.xml or pom.xml

Answer 2

I stumbled upon an answer: Adding the following piece of code in the same package where I'm using jdbcTemplate
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.ImportResource;
#Configuration
#ImportResource("classpath:spring-resource1.xml")
public class DAOConfiguration {
}
appears to let Spring know that it should look in the referenced XML file that is, in fact, under the project's resources/ directory.