无法从START_ARRAY标记中反序列化contactupload.User的实例

Posted 2021-04-20

我正在使用jackson api解析json响应，我遇到了这个例外，请帮助我，我是杰克逊解析的新手。

json回应：

[{"0":"96859","userid":"96859","1":"fshdh","phoneid":"fshdh","2":"","imageid":""},{"0":"67656656","userid":"67656656","1":"bdndjj","phoneid":"bdndjj","2":"","imageid":""},{"0":"6469895","userid":"6469895","1":"vzbdjn","phoneid":"vzbdjn","2":"","imageid":""},{"0":"6865665","userid":"6865665","1":"hdhdhh","phoneid":"hdhdhh","2":"","imageid":""}]

杰克逊解析：

private User user;
    ObjectMapper mapper=new ObjectMapper();
    user=mapper.readValue(response, User.class);

答案

您需要更改它以读取用户数组：

ObjectMapper mapper = new ObjectMapper();
User[] users = mapper.readValue(response, User[].class);