public <T> void exportToCsv(String fileName, Iterator<T> data) {
try {
Files.createDirectories(Paths.get(DIR));
StringBuilder content = new StringBuilder();
List<Method> getters = null;
while (data.hasNext()) {
T t = data.next();
if (getters == null) {
getters = ReflectionUtil.getAllGetters(t.getClass());
getters.sort((a, b) -> a.getName().length() - b.getName().length());
}
for (Method getter : getters) {
try {
String value = String.valueOf(getter.invoke(t));
content.append(value).append(',');
} catch (IllegalAccessException | InvocationTargetException e) {
e.printStackTrace();
}
}
content.append('\n');
}
Files.write(
Paths.get(DIR + fileName),
content.toString().getBytes("UTF-8"),
CREATE,
WRITE,
StandardOpenOption.TRUNCATE_EXISTING);
} catch (IOException e) {
e.printStackTrace();
}
}
