我試圖插入沒有成功的電話列表。我的域客戶端類@Entity   public class Client {@Id @GeneratedValue(strategy = GenerationType.IDENTITY)private Integir id;private String name;@JsonManagedReference@ManyToMany(cascade = CascadeType.ALL)@JoinTable(****)private List<Phone> phones = new ArrayList<>();**gets and sets**   public Client (String name){   this.name = name;   }}我的域電話課程@Entitypublic class Phone {@Id @GeneratedValue(strategy = GenerationType.IDENTITY)private Integir id;private String number;@JsonBackReference@ManyToMany(mappedBy = "phones")private List<Client> clients = ArrayList<>();**gets and sets**    public Phone(String number) {    this.number = number;    }  }我有一個DTO客戶public class ClientDTO {private String name;private String number;private List<Phone> numbers = ArryList<>();**gets and sets** }我的服務ClientService具有此方法：public Client fromDTO (ClientDTO clientDTO) {  Client c = new Client(clientDTO.getName());  for(Phone p: clientDTO.getNumbers()) {  p.setNumber(x.getNumber);  p.getClients().addALL(Arrys.asList(c));  c.getPhones().addAll(Arrys.asList(p));  }}如果我在郵遞員中嘗試這樣做：{ "name" : "Teste", "numbers":   [   { "number" : "xxxxxx"},   { "number" : "yyyyyyy"}    ]}顯示錯誤415：不支持的媒體類型如果我將ClientDTO更改為：public class ClientDTO {private String name;private String number;**gets and sets** }而我在ClientService中的方法可以：public Client fromDTO (ClientDTO clientDTO) {Client c = new Client(clientDTO.getName());Phone p = new Phone(clientDTO.getPhone());p.getClients().addAll(Arrys.asList(c));c.getPhones().addAll(Arrays.asList(p));}然后在我的郵遞員中發(fā)送：{  "name" : "Teste",  "number": "xxxxx" }工作良好。我在做什么錯？