FeignClient调用失败

问题一：报文解析失败

报文：{"code":200,"msg":"成功","total":0,"data":{"no":"07295537366"},"success":true}

调用：

@PostMapping("/confirm")
ApiResponse confirm(@RequestParam String request);

public class ApiResponse {
    private boolean success;
    private Integer code;
    private String msg;
    private T data;
}

报错：

feign.codec.DecodeException: Error while extracting response for type [com.model.ApiResponse] and content type [application/json;charset=UTF-8]; nested exception is org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize instance of `java.lang.String` out of START_OBJECT token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `java.lang.String` out of START_OBJECT token
 at [Source: (ByteArrayInputStream); line: 1, column: 74] (through reference chain: com.model.ApiResponse["data"])
	at feign.SynchronousMethodHandler.decode(SynchronousMethodHandler.java:180)
	at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:140)
	at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:78)
	at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:103)
	at com.sun.proxy.$Proxy262.confirm(Unknown Source)

原因：使用feign调用接口，接收的数据结构必须和报文返回的结构一样。返回报文中data是对象，用string接收会报错。

扩充：jackson进行反序列化时，如果类型参数是JavaType，则使用泛型接收时，泛型需要和报文对应，不能使用string进行统一接收，再做处理。

源码：