list去重
List<String> customerList = new ArrayList<String>();
Set<String> hashSet = new HashSet<String>();
for (int x = 0; x < sheetData.size(); x++) {
List<String> rowData = (List<String>)sheetData.get(x);
if (hashSet.add(rowData.get(0))) {
customerList.add(rowData.get(0));
}
}
待续