customers:
  UniqueProductName1:
    SubscriptionPlan1:
      User1: {payment:150, limit: 200}
      User2: {payment:200, limit: 300}
      User3: {payment:60, limit: 100}
    SubscriptionPlan2:
      User1: {payment:150, limit: 200}
      User2: {payment:200, limit: 300}
      User5: {payment:150, limit: 200}
  UniqueProductName2:
    SubscriptionPlan1:
      User6: {payment:150, limit: 200}
      User7: {payment:200, limit: 300}
      User4: {payment:60, limit: 100}
    SubscriptionPlan2:
      User5: {payment:150, limit: 200}
      User8: {payment:200, limit: 300}
      User9: {payment:150, limit: 200}
    SubscriptionPlan3:
      User5: {payment:150, limit: 200}
      User8: {payment:200, limit: 300}
      User10: {payment:150, limit: 200}

<dependency>
        <groupId>com.fasterxml.jackson.dataformat</groupId>
        <artifactId>jackson-dataformat-yaml</artifactId>
        <version>2.8.3</version>
</dependency>

@Configuration
@EnableConfigurationProperties
@ConfigurationProperties("customers")
public class MainYaml {

    public List<CustomerProduct> customerProductList;

    //getter and setter

public class CustomerProduct{
    public String productName;
    public List<CustomerPlan> customerPlansList;

    //getter and setter

public class CustomerPlan{
    public String customerName;
    public List<CustomerDetail> customerDetailsList;

    //getter and setter

public class CustomerDetail {

@JsonProperty
public String payment;

@JsonProperty
public String limit;