<dependency>
  <groupId>com.mchange</groupId>
  <artifactId>c3p0</artifactId>
  <version>0.9.5.5</version>
</dependency>

spring:
 application:
  name: nh-tst
 http:
  encoding:
   charset: UTF-8
   enabled: true
   force: true
 datasource:
  driver-class-name: oracle.jdbc.driver.OracleDriver
 jpa:
  hibernate:
   ddl-auto: none
  show-sql: true
c3p0:
 jdbcUrl: jdbc:oracle:thin:@xxxxx:1522/prodpdb1
 user: xxxxxx
 password: xxxxxx
 driverClass: oracle.jdbc.driver.OracleDriver
 minPoolSize: 3
 maxPoolSize: 30
 maxIdleTime: 1800000
 acquireIncrement: 120
 maxStatements: 100000
 initialPoolSize: 5
 idleConnectionTestPeriod: 60
 acquireRetryAttempts: 30
 acquireRetryDelay: 10000
 breakAfterAcquireFailure: false
 testConnectionOnCheckout: false

package com.nh.fk.tst.config;

import javax.sql.DataSource;

import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import com.mchange.v2.c3p0.ComboPooledDataSource;

@Configuration
public class DataSourceConfiguration {
 // c3p0 連接池
 @Bean(name = "dataSource")
 @Qualifier(value = "dataSource")
 @Primary
 @ConfigurationProperties(prefix = "c3p0")
 public DataSource dataSource() {
 return DataSourceBuilder.create().type(ComboPooledDataSource.class).build();
 }
}