Java 从外部响应获取未编码的消息

我有一个POST方法，成功时返回

JSON

响应，错误时返回

application/x-www-form-urlencoded

@PostMapping(path = SUBSCRIBE_PATH, consumes = APPLICATION_JSON_VALUE)
    MySubscribeRs subscribe(@RequestHeader("Api-Key") String apiKey,
                                @RequestBody String requestBody);

下面是一个错误示例：

400 Bad request
["The user already has a subscription"]

我捕获了FaignException，其中包含详细信息：

[400 Bad Request] during [POST] to [http://localhost:11619/api/cb/payments/subscribe/] [MyFeignRestClient#subscribe(String,String)]: [["The user already has a subscription"]]

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如何在不解析字符串的情况下获取

“用户已经有订阅”

消息？

如果REST调用没有返回JSON响应，而是返回异常消息，则需要解析异常消息。exception.getMessage（）返回什么？@SusanMustafa我在帖子中描述了它，您需要解析它