Springboot REMOTE Oracle connect 오류 해결

datasource:
    mysql:
#      driver-class-name: com.mysql.cj.jdbc.Driver
#      jdbc-url: jdbc:log4jdbc:mysql://"IP":3306/bilab?&characterEncoding=UTF-8&serverTimezone=Asia/Seoul

      driver-class-name: net.sf.log4jdbc.sql.jdbcapi.DriverSpy
      jdbc-url: jdbc:log4jdbc:mysql://"IP":3306/bilab?&characterEncoding=UTF-8&serverTimezone=Asia/Seoul
      username: kang
      password: kang1234
    oracle:
#      driver-class-name: oracle.jdbc.driver.OracleDriver
#      jdbc-url: jdbc:oracle:thin:@localhost:1521/xe

      driver-class-name: net.sf.log4jdbc.sql.jdbcapi.DriverSpy
#      jdbc-url: jdbc:log4jdbc:oracle:thin:@localhost:1521/xe
      jdbc-url: jdbc:log4jdbc:oracle:thin:"IP":1521:xe
#      jdbc-url: jdbc:oracle:thin:@"IP":1521:xe
      username: kang
      password: 1234
#    hikari:
#      jdbc-url:

IO 오류: Connection refused (CONNECTION_ID=

뭐시기가 나오면, 아래 의존성을 추가.

<!-- 	아래 의존성이 없으면 원격 ORACLE 접속이 안 됨 -->
 		<dependency>
			<groupId>com.oracle.ojdbc</groupId>
			<artifactId>orai18n</artifactId>
			<version>19.3.0.0</version>
		</dependency>

<?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>2.5.3</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>
	<groupId>net.lunalabs</groupId>
	<artifactId>central</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>central</name>
	<description>Demo project for Spring Boot</description>
	<properties>
		<java.version>11</java.version>
	</properties>
	<dependencies>

		<!-- log4jdbc -->
		<dependency>
			<groupId>org.bgee.log4jdbc-log4j2</groupId>
			<artifactId>log4jdbc-log4j2-jdbc4.1</artifactId>
			<version>1.16</version>
		</dependency>

<!-- 	아래 의존성이 없으면 원격 ORACLE 접속이 안 됨 -->
 		<dependency>
			<groupId>com.oracle.ojdbc</groupId>
			<artifactId>orai18n</artifactId>
			<version>19.3.0.0</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jdbc</artifactId>
		</dependency>

		<!-- MariaDB는 다른 식으로 연결.. -->

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-validation</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
			<exclusions>
				<!-- 스프링 부트에서 Log4j2를 사용하기위해선 내부로깅에서 쓰이는 의존성을 제외해주어야 합니다. 기본적으로 Spring은 Slf4j라는 로깅 프레임워크를 사용합니다. 구현체를 손쉽게 교체할 수 있도록 도와주는 프레임 워크입니다. Slf4j는 인터페이스고 내부 구현체로 logback을 가지고 있는데, Log4j2를 사용하기 위해 exclude 해야 합니다. -->
				<exclusion>
					<groupId>org.springframework.boot</groupId>
					<artifactId>spring-boot-starter-logging</artifactId>
				</exclusion>
			</exclusions>
		</dependency>
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>2.2.0</version>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>com.oracle.database.jdbc</groupId>
			<artifactId>ojdbc8</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.mariadb.jdbc</groupId>
			<artifactId>mariadb-java-client</artifactId>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.restdocs</groupId>
			<artifactId>spring-restdocs-mockmvc</artifactId>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>
	</dependencies>

	<build>
		<finalName>bilabCs</finalName>
		<plugins>
			<plugin>
				<groupId>org.asciidoctor</groupId>
				<artifactId>asciidoctor-maven-plugin</artifactId>
				<version>1.5.8</version>
				<executions>
					<execution>
						<id>generate-docs</id>
						<phase>prepare-package</phase>
						<goals>
							<goal>process-asciidoc</goal>
						</goals>
						<configuration>
							<backend>html</backend>
							<doctype>book</doctype>
						</configuration>
					</execution>
				</executions>
				<dependencies>
					<dependency>
						<groupId>org.springframework.restdocs</groupId>
						<artifactId>spring-restdocs-asciidoctor</artifactId>
						<version>${spring-restdocs.version}</version>
					</dependency>
				</dependencies>
			</plugin>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
				<configuration>
					<excludes>
						<exclude>
							<groupId>org.projectlombok</groupId>
							<artifactId>lombok</artifactId>
						</exclude>
					</excludes>
				</configuration>
			</plugin>
		</plugins>
	</build>

</project>