解决方案

spring.jackson.deserialization.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT=true

异常信息

feign.codec.DecodeException: Error while extracting response for type [com.test.BizResult<com.test.InviteOrderResp>] and content type [application/json]; nested exception is org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot construct instance of com.test.InviteOrderResp (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value (''); nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of com.test.InviteOrderResp (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value ('')
at [Source: (ByteArrayInputStream); line: 1, column: 168] (through reference chain: com.test.BizResult["data"])
at feign.AsyncResponseHandler.decode(AsyncResponseHandler.java:119)
at feign.AsyncResponseHandler.handleResponse(AsyncResponseHandler.java:87)
at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:138)
at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:89)
at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:100)

http接口返回值

{"code":102,"errorCode":null,"error_code":null,"error_message":null,"status":null,"message":"","data":"","errNo":null}

feign接口

    @GetMapping(value = "/api/test")
    BizResult<InviteOrderResp> test(@RequestParam("code") String code);

BizResult

@Data
public class BizResult<T> implements Serializable {
    private Integer code;
    private String message;
    private List<IBizCode> errorList;
    private BizFlowOperator flowOperator;

    private T data;
    private long total;
    private long current;
    private long pageSize;
}

InviteOrderResp

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.io.Serializable;
import java.util.Date;

@Data
@NoArgsConstructor
@AllArgsConstructor
public class InviteOrderResp implements Serializable {
    private static final long serialVersionUID = -1L;
    private String mobile;
    private String name;
}