apollo-demo/src/main/java/com/ctrip/framework/apollo/demo/api/ApolloConfigDemo.java/ApolloConfigDemo/printEnvInfo
class ApolloConfigDemo:  private void printEnvInfo() {
    String message = String.format("AppId: %s, Env: %s, DC: %s, IP: %s", Foundation.app()
        .getAppId(), Foundation.server().getEnvType(), Foundation.server().getDataCenter(),
        Foundation.net().getHostAddress());
    System.out.println(message);
  }