ObjectMapper mapper = new ObjectMapper();
XmlMapper xmlMapper = new XmlMapper();
ListPOJO list = new ListPOJO();
list.v.add(new POJO(1, 2));
list.v.add(new POJO(3, 4));
String xml = xmlMapper.writeValueAsString(list);
ObjectReader detecting = mapper.reader(ListPOJO.class);
ListPOJO resultList = detecting
.withFormatDetection(detecting, xmlMapper.reader(ListPOJO.class))
.readValue(utf8Bytes(xml));