server:
  port: ${port:9080}
spring:
  datasource:
    data: schema-setup.sql
    driver-class-name: org.h2.Driver
#    name: datasource
    initialize: true
    sql-script-encoding: UTF-8
    url: jdbc:h2:mem:JavaSpringBootBatch;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE;MODE=MySQL;
    username: sa
    password:
#    schema: schema-setup.sql
  profiles: # default, development, production
    active: default, development
---
spring:
  h2:
    console:
      enabled: true
      path: /h2-console
  profiles: development
---
server:
  port: ${port:80}
spring:
  datasource:
    # ...datasource config here
  profiles: production

@Configuration
public class PlayerBatchConfig {
  ...

  @Bean
  public ItemWriter<Player> writer(final DataSource dataSource) {
    final JdbcBatchItemWriter<Player> jdbcItemWriter = new JdbcBatchItemWriter<>();
    ...
    jdbcItemWriter.setDataSource(dataSource);
    jdbcItemWriter.setSql(sql.toString());
    return jdbcItemWriter;
  }
}

@Configuration
public class PlayerBatchConfig {
  @Bean
  @ConfigurationProperties(prefix = "datasource")
  public DataSource dataSource() {
    return DataSourceBuilder.create().build();
  }

  ...
}