无法从 START_OBJECT 个令牌中反序列化 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 json 和错误消息。 PaymentResponse java pojo 是通用代码，我无权添加任何注释。对添加反序列化配置有帮助吗？

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 token

com.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

理想情况是您可以将响应更改为：

[{
        "uid": "111",
        "name": "kiran"
    }, {
        "uid": "112",
        "name": "kumar"
    }
]

如果你不能改变它，那么请试试这个：

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));

无法从 START_OBJECT 个令牌中反序列化 PaymentResponse[] 的实例

Can not deserialize instance of PaymentResponse[] out of START_OBJECT token

java

json

jackson

jackson-databind