Custom encoders and decoders
The Feign Builder API allows us to create custom encoders for a request, and decoders for a response, to the Feign client.
Custom encoder
Let's create a custom encoder for a request body.
The request body data has been sent to the server by a POST method using either the String or byte[] parameter. You can add a Content-Type header:
interface AccountService {
@PostMapping("/account/")
@Headers("Content-Type: application/json")
Account create(@RequestBody Account account);
} Let's configure your own custom encoder; now it will be the type-safe request body. Let's see the following example using the feign-gson extension:
class Account {
Integer accountId;
Double balance;
Integer customerId;
String accountType;
String branchCode;
String bank;
public Account(Integer accountId, Double balance, Integer customerId, String accountType, String branchCode,
String bank) {
super();
this.accountId = accountId...
