<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 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><groupId>org.badtree</groupId><artifactId>badtree</artifactId><version>0.0.1-SNAPSHOT</version><packaging>jar</packaging><name>badtree</name><url>http://maven.apache.org</url><properties><java.version>1.8</java.version><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.0.2.RELEASE</version></parent><dependencies><!-- local library --><dependency><groupId>com.oracle</groupId><artifactId>ojdbc</artifactId><version>6</version><scope>system</scope><systemPath>${project.basedir}/lib/ojdbc-6.jar</systemPath></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jpa</artifactId></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId></dependency></dependencies>
</project>

package org.badtree.utils;import org.springframework.stereotype.Component;@Component
public class PasswordUtil {public String getPassowrd() {return "123456";}}

org.badtree.datasource.driver-class-name = oracle.jdbc.driver.OracleDriver
org.badtree.datasource.url = jdbc:oracle:thin:@localhost:1521:badtreedb
org.badtree.datasource.username = badtree

package org.badtree;import org.springframework.boot.Banner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.ImportResource;@SpringBootApplication
@ImportResource(locations={"classpath:applicationContext.xml"})
public class Application {public static void main(String[] args) {SpringApplication app = new SpringApplication(Application.class);app.setBannerMode(Banner.Mode.OFF);ConfigurableApplicationContext context = app.run(args);}}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"><bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource"><property name="driverClassName" value="${org.badtree.datasource.driver-class-name}"/><property name="jdbcUrl" value="${org.badtree.datasource.url}"/><property name="username" value="${org.badtree.datasource.username}"/><property name="password"  value="#{passwordUtil.getPassowrd()}"/></bean><bean id="passwordUtil" class="org.badtree.utils.PasswordUtil" />
</beans>

package org.badtree;import org.springframework.boot.Banner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;@SpringBootApplication
public class Application {public static void main(String[] args) {SpringApplication app = new SpringApplication(Application.class);app.setBannerMode(Banner.Mode.OFF);ConfigurableApplicationContext context = app.run(args);}}

package org.badtree.config;import javax.sql.DataSource;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;import org.badtree.utils.PasswordUtil;
import com.zaxxer.hikari.HikariDataSource;@Configuration
public class DataSourceConfig {@Value("${org.badtree.datasource.driver-class-name}")private String driverClassName;@Value("${org.badtree.datasource.url}")private String jdbcUrl;@Value("${org.badtree.datasource.username}")private String username;@Autowiredprivate PasswordUtil passwordUtil;@Beanpublic DataSource dataSource() {HikariDataSource dataSource = new HikariDataSource();dataSource.setDriverClassName(driverClassName);dataSource.setJdbcUrl(jdbcUrl);dataSource.setUsername(username);dataSource.setPassword(passwordUtil.getPassowrd());return dataSource;}
}