how to connect oracle database 18cXE to spring boot

HEY SENPAI i'm new to spring-boot and i'm completely lost on this one,

i'm trying to connect to oracle database 18C Express Edition with this configuration :

app.properties:

spring.datasource.url=jbdc:oracle:thin:@localhost:1521:XEPDB1
spring.datasource.data-username=hr;
spring.datasource.data-password=hr;
spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver

pom files :

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.3.3.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.example</groupId>
	<artifactId>dbtest</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>demo-1</name>
	<description>Demo project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-jpa</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
			<exclusions>
				<exclusion>
					<groupId>org.junit.vintage</groupId>
					<artifactId>junit-vintage-engine</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
		</dependency>
		<dependency>
			<groupId>com.oracle.database.jdbc</groupId>
			<artifactId>ojdbc8</artifactId>
			<scope>runtime</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

</project>

the entry point app code:

package com.example.demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.jdbc.core.JdbcTemplate;

@SpringBootApplication
public class Demo1Application{
	@Autowired
	static JdbcTemplate jdbctemplate;
	public static void main(String[] args) {
		SpringApplication.run(Demo1Application.class, args);
		jdbctemplate.query("SELECT * FROM EMPLOYEES", (rse)->{
			System.out.println(rse.getString("FIRST NAME") + " " + rse.getString("LAST_NAME"));
		});
		
	}

		
}

i didn't know what is happening due to my lack of experience i've tried several and still stuck

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.RuntimeException: Driver oracle.jdbc.driver.OracleDriver claims to not accept jdbcUrl, jbdc:oracle:thin:@localhost:1521:XEPDB1
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:655) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:635) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1336) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1176) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:556) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:516) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:324) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:322) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1109) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:869) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at com.example.demo.Demo1Application.main(Demo1Application.java:14) [classes/:na]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.RuntimeException: Driver oracle.jdbc.driver.OracleDriver claims to not accept jdbcUrl, jbdc:oracle:thin:@localhost:1521:XEPDB1
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:650) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
... 20 common frames omitted
Caused by: java.lang.RuntimeException: Driver oracle.jdbc.driver.OracleDriver claims to not accept jdbcUrl, jbdc:oracle:thin:@localhost:1521:XEPDB1
at com.zaxxer.hikari.util.DriverDataSource.<init>(DriverDataSource.java:110) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.pool.PoolBase.initializeDataSource(PoolBase.java:325) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.pool.PoolBase.<init>(PoolBase.java:114) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:108) ~[HikariCP-3.4.5.jar:na]
at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-3.4.5.jar:na]
at org.springframework.jdbc.datasource.DataSourceUtils.fetchConnection(DataSourceUtils.java:158) ~[spring-jdbc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:116) ~[spring-jdbc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:79) ~[spring-jdbc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:324) ~[spring-jdbc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.boot.jdbc.EmbeddedDatabaseConnection.isEmbedded(EmbeddedDatabaseConnection.java:120) ~[spring-boot-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.autoconfigure.orm.jpa.HibernateDefaultDdlAutoProvider.getDefaultDdlAuto(HibernateDefaultDdlAutoProvider.java:42) ~[spring-boot-autoconfigure-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration.lambda$getVendorProperties$1(HibernateJpaConfiguration.java:130) ~[spring-boot-autoconfigure-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.autoconfigure.orm.jpa.HibernateSettings.getDdlAuto(HibernateSettings.java:41) ~[spring-boot-autoconfigure-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties.determineDdlAuto(HibernateProperties.java:136) ~[spring-boot-autoconfigure-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties.getAdditionalProperties(HibernateProperties.java:102) ~[spring-boot-autoconfigure-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.autoconfigure.orm.jpa.HibernateProperties.determineHibernateProperties(HibernateProperties.java:94) ~[spring-boot-autoconfigure-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaConfiguration.getVendorProperties(HibernateJpaConfiguration.java:132) ~[spring-boot-autoconfigure-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at org.springframework.boot.autoconfigure.orm.jpa.JpaBaseConfiguration.entityManagerFactory(JpaBaseConfiguration.java:133) ~[spring-boot-autoconfigure-2.3.3.RELEASE.jar:2.3.3.RELEASE]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_261]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_261]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.0_261]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_261]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.8.RELEASE.jar:5.2.8.RELEASE]
... 21 common frames omitted

please i need help this is my firstimer with spring boot? COME ON STACK OVERFLOW! and sorry for my englis

Based on Oracle docs (https://docs.oracle.com/cd/B28359_01/java.111/b31224/urls.htm#BEIDHCBA), I would possibly try different connection string:

spring.datasource.url=jbdc:oracle:thin:@//localhost:1521/XEPDB1

When I read this claims to not accept jdbcUrl, jbdc:oracle:thin:@localhost:1521:XEPDB1 I realized what is happening.

1. There is a typo in there jbdc <> jdbc
2. 18cXE is a container database. You are connecting to pluggable database XEPDB1. You can no longer connect to the cdb-instance (SID) itself XE (like you could in 11gXE), instead is the pluggable database exposed through the listener by service_name XEPDB1 and service_name means forslash /XEPDB1.

Your connect-string will be:

spring.datasource.url=jdbc:oracle:thin:@//localhost:1521/XEPDB1

Best of luck!

first of all i just noticed that there's a typo in my spring.datasource.url thanks to @Bjarte Brandt and after that naming convention is take a role in my problem if you don't specify it as @Alexander Makarov mentioned the exception throwm, and thanks for the responses all hail stack overflow