无法从 START_OBJECT 令牌反序列化 PaymentResponse[] 的实例

Question

无法使用 jackson objectmapper 读取响应。退出 START_OBJECT 令牌。这是输入的 json 和错误消息。PaymentResponse java pojo 是通用代码，我无权添加任何注释。添加反序列化配置有什么帮助吗？ObjectMapper objectMapper = new ObjectMapper();PaymentResponse[] paymentResponse  = objectMapper.readValue(serverResponseStr, PaymentResponse[].class);{    "PaymentResponse[]": [        {            "uid": "111",            "name": "kiran"        },        {            "uid": "112",            "name": "kumar"        }    ]}Can not deserialize instance of PaymentResponse[] out of START_OBJECT tokencom.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of PaymentResponse[] out of START_OBJECT token at [Source: {"PaymentResponse[]": [{"uid": "111","name": "kiran"},{"uid": "112","name": "kumar"}]}

Answer 1

理想的情况是，如果您可以将响应更改为以下内容：

[{

        "uid": "111",

        "name": "kiran"

    }, {

        "uid": "112",

        "name": "kumar"

    }

]

如果您无法更改它，请尝试以下操作：

ObjectMapper objectMapper = new ObjectMapper();

TypeFactory typeFactory = objectMapper.getTypeFactory();

JsonNode array = objectMapper.readValue(anotherResponseStr, JsonNode.class);

JsonNode paymentResponse = array.get("PaymentResponse[]");

List<PaymentResponse> p = objectMapper.readValue(paymentResponse.toString(), 

typeFactory.constructCollectionType(List.class, PaymentResponse.class));