如何覆盖spring boot 2.0.x中的默认连接池限制

spring.datasource.hikari.maximum-pool-size=20
spring.datasource.hikari.minimum-idle=5
spring.datasource.hikari.idle-timeout=600000
spring.datasource.hikari.max-lifetime=1800000
spring.datasource.hikari.connection-timeout=30000

spring:
  datasource:
    hikari:
      maximum-pool-size: 20
      minimum-idle: 5
      idle-timeout: 600000
      max-lifetime: 1800000
      connection-timeout: 30000

import com.zaxxer.hikari.HikariDataSource;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;

@Configuration
public class DataSourceConfig {

    @Bean
    public DataSource dataSource() {
        HikariDataSource dataSource = DataSourceBuilder.create()
                .type(HikariDataSource.class)
                .url("jdbc:mysql://localhost:3306/mydb")
                .username("user")
                .password("password")
                .maximumPoolSize(20)
                .minimumIdle(5)
                .idleTimeout(600000)
                .maxLifetime(1800000)
                .connectionTimeout(30000)
                .build();
        return dataSource;
    }
}