Failing to start my spring boot application due to 'javax.sql.DataSource' that could not be found - mysql

Question

I am a beginner in spring boot and am trying to write a simple spring boot application.
My folder structure is as follows:
-> Project
-> build.gradle
-> settings.gradle
-> src/main/java
-> package
-> Main.java
-> UserController.java
-> UserRespository.java
-> dto
-> User.java
->src/main/resouces
-> application.properties
My build.gradle is as follows :
buildscript {
repositories {
jcenter()
}
dependencies {
classpath(
'org.springframework.boot:spring-boot-gradle- plugin:1.5.6.RELEASE'
)
classpath('mysql:mysql-connector-java:5.1.34')
}
}
apply plugin: 'java'
apply plugin: 'spring-boot'
sourceCompatibility = 1.8
targetCompatibility = 1.8
repositories {
mavenCentral()
}
dependencies {
compile(
'org.springframework.boot:spring-boot-starter-actuator',
'org.springframework.boot:spring-boot-starter-web',
'org.springframework.boot:spring-boot-starter-data-jpa'
)
compile('mysql:mysql-connector-java')
testCompile('org.springframework.boot:spring-boot-starter-test')
}
The application.properties is as follows:
spring.jpa.hibernate.ddl-auto=create
spring.datasource.url=jdbc:mysql://localhost:3306/user
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.database-platform=org.hibernate.dialect.MySQLDialect
spring.jpa.database=MYSQL
spring.jpa.show-sql = true
My Main.java is as follows:-
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
#SpringBootApplication
#EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
public class Main {
public static void main(String[] args) {
SpringApplication.run(Main.class, args);
};
}
I am able to successfully build the application. If I run the application , I get Unable to start application with the following stacktrace:
2017-08-14 20:43:02.976 WARN 27205 --- [ main] ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration': Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'javax.sql.DataSource' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
2017-08-14 20:43:02.978 INFO 27205 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2017-08-14 20:43:03.007 INFO 27205 --- [ main] utoConfigurationReportLoggingInitializer :
Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-08-14 20:43:03.198 ERROR 27205 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
Parameter 0 of constructor in org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration required a bean of type 'javax.sql.Data Source' that could not be found.
- Bean method 'dataSource' not loaded because #ConditionalOnProperty (spring.datasource.jndi-name) did not find property 'jndi-name'
- Bean method 'dataSource' not loaded because #ConditionalOnBean (types: org.springframework.boot.jta.XADataSourceWrapper; SearchStrategy: all) did not find any beans
Action:
Consider revisiting the conditions above or defining a bean of type 'javax.sql.DataSource' in your configuration.
I have checked the dependencies tree and can find both hibernate as well as mysql connector in it.
Have tried removing #EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class}) , in that case I get Cannot load driver class: com.mysql.jdbc.Driver

Answer 1

You should move the dto package inside into your Main.java class package, In your case it should be like src/main/java/package/dto
So when spring-boot scans, your entity will be visible to the scanner.
Make sure you have added the MySQL driver dependency
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>