我有一个对象,例如 Response.java,如下所示:
class Response
{
private User user; // has firstName, lastName, age etc.
private Address address; // has city, state, country etc.
private OrderInfo orderInfo; // has orderNumber, orderDate etc.
// constuctors, getters/setters follow
}
我需要将这些对象的列表转换为 csv,所以我的最终目标是这样的:
firstName, lastName, age, city, state, country, latitude, orderNumber, orderDate
john, doe, 25, dallas, tx, usa, somelat, 101, 08/17/2015
jane, doe, 21, atlant, ga, usa, somelat, 102, 08/15/2015
我尝试使用两个库 - jackson(csv 数据格式)、org.json(JsonArray),但我无法获得所需的结果。
这是我的杰克逊 csv 代码:
Response response = getResponse();
final CsvMapper mapper = new CsvMapper();
final CsvSchema schema = mapper.schemaFor(Response.class);
final String csv = mapper.writer(schema).writeValueAsString(response);
和杰克逊在一起,我得到了
com.fasterxml.jackson.core.JsonGenerationException: CSV generator does not support Object values for properties
有没有办法按照我需要的方式将复合对象转换为 csv(只是没有 json 分组的字段)?