我需要写这样的对象
class User {
UUID id;
String name;
Role role;
}
class Role {
String name;
LocalDate activeFrom;
Authority owner;
}
class Authority {
String name;
}
棘手的想法是,csv编写应该在对象树中递归地工作。还需要像2019-11-05 f.e.一样将LocalDate编写为字符串;
生成的csv文件应该是扁平的,看起来像:
user.id,user.name,user.role.name,user.role.activeFrom,user.role.owner.name
//示例值
我已经尝试过OpenCsv:
StatefulBeanToCsv<User> beanToCsv = new StatefulBeanToCsvBuilder<User>(printWriter).build();
try {
beanToCsv.write(users);
} catch (CsvDataTypeMismatchException | CsvRequiredFieldEmptyException e) {
e.printStackTrace();
}
printWriter.close();
和Univocity解析器:
CsvWriterSettings settings = new CsvWriterSettings();
ObjectRowWriterProcessor processor = new ObjectRowWriterProcessor();
settings.setRowWriterProcessor(processor);
processor.convertType(User.class,);
到目前为止没有运气。它们只能序列化为csv的顶级对象。同样在OpenCsv中,我还有序列化LocalDate的问题。 你能帮助我吗?咨询方法或图书馆?