Thanks for your quick reply.
Sorry, but I need to program with my own business logic (which is complex, interacting with other business modules in my system) in step 2.
I would like to to read and process huge CSV files with millions of records, which we collected from the communications carriers' network.Here is my logic as a simplified procedure:
1) Read the CSV file with FTP protocol
2) Parse the CSV file with my own logic, such as combination, duplicates...
I would like to provide the following code in calculating average rainfall, maximum or minimum temperatures.
public static void readCSV() throws FileNotFoundException {
// 1st, config the CSV reader, such as line separator, column separator and so on
CsvParserSettings settings =...