Parse json包含数组和对象

Question

我有来自payfort的JSON来读取交易，试图将其解析为POJO，但总是给我不匹配错误

[
[
{
"response_code": "04000",
"card_holder_name": null,
"acquirer_mid": "***",
"payment_link_id": null,
"order_description": "21882 - SAR"
}
],
{
"data_count": 70
}
]

这是我的根pojo，我用字符串

解析它

@Data
@JsonInclude(JsonInclude.Include.NON_NULL)
public class DownloadReportResponse {
private TransactionCount transactionCount;
private List<TransactionsResponse> transactions;
}

解析:

List<DownloadReportResponse> properties = new ObjectMapper().readValue(report, new TypeReference<>() {
});

Answer 1

扩展我的评论，你可以尝试这样做:

ObjectMapper om = new ObjectMapper();
//read the json into a generic structure    
JsonNode tree = om.readTree(json);

//check if the top level element is an array
if(tree.isArray()) {
//iterate over the elements
tree.forEach(element -> {
//distinguish between nested list and object
if(element.isArray()) {
List<TransactionsResponse> responses = om.convertValue(element, new TypeReference<List<TransactionsResponse>>(){});
//do whatever needed with the list
} else if(element.isObject()) {
TransactionCount txCount = om.convertValue(element, TransactionCount .class);  
//use the count as needed
}
});
}

这取决于您获得的数组包含TransactionsResponse元素或TransactionCount类型对象的内部数组，但没有其他内容。

然而，如果你有机会修改响应，我建议你拍摄这样的方式更容易解析和理解:

{
"transactions":[ ... ],
"transactionCount": {
"data_count": 70
}
}