杰克逊反序列化“”为空列表

几个选择；首先，您要启用`ACCEPT_EMPTY_STRING_AS_NULL_OBJECT’：

mapper.enable(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT);

so that empty String becomes null. And if you want it to get converted to
actual empty List, override setter:

public void setChildren(List<Child> c) {    if (c == null) {       children = Collections.emptyList();    } else {       chidlren = c;    }}