java - 反向列表

Question

List listDataClient;

My class DataCLient:

Client client;
List<String> phoneNumber;

i have a second list

List<DataPhoneNumber> listPhoneNumber;

My class DataPhoneNumber:

String phoneNumber;
List<Client> client;

In my code i put data in my first list but now i want to reverse my list in the second. In the first list i have a Client wiht x NumberPhone now i want to have NumberPhone for x Client

score 1 · Accepted Answer

听起来您正在尝试建立多对多关系的模型。

一种方法是创建一个类来明确表示这种关系PhoneNumberAssociation：例如

public class PhoneNumberAssociation {
  private final Set<Client> clients;
  private final Set<String> phoneNumbers;

  public void addClient(Client client) {
    this.clients.add(client);
  }

  public void addPhoneNumber(String phoneNumber) {
    this.phoneNumbers.add(phoneNumber);
  }
}

当他们在关系中没有明显的父母或孩子角色时，我倾向于使用这种方法。它也比在多个对象中嵌入列表并且必须根据电话号码是否被添加到客户端/从客户端中删除（或者相反，如果客户端正在添加到电话号码中/从电话号码中删除）链接调用来添加/删除更简单）。

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