Java:大文件拆分工具

java大文件拆分工具（过滤掉表头）

import java.io.BufferedReader;

import java.io.BufferedWriter;

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

public class SplitTools {

    public static void main(String[] args) throws IOException {

        // "E:\\eutranrelation.csv";

        String bigFilePath = args[0];

        // "E:\\eutranrelation-%s.csv";

        String splitFileParttern = args[1];

        //

        int splitFileCount = Integer.valueOf(args[2]);

        BufferedReader reader = new BufferedReader(new FileReader(bigFilePath));

        String header = reader.readLine();

        int totalLine = 0;

        if (header != null) {

            String line = null;

            while ((line = reader.readLine()) != null) {

                totalLine++;

            }

        }

        reader.close();

        int splitFileTotalLines = totalLine / splitFileCount;

        int generateFileIdx = 0;

        BufferedWriter bufferedWriter = null;

        reader = new BufferedReader(new FileReader(bigFilePath));

        header = reader.readLine();

        int currentIdx = 0;

        if (header != null) {

            String line = null;

            while ((line = reader.readLine()) != null) {

                if (currentIdx == 0) {

                    String filePath = String.format(splitFileParttern,

                            String.valueOf(generateFileIdx));

                    bufferedWriter = new BufferedWriter(

                            new FileWriter(filePath));

                }

                bufferedWriter.write(line + "\r\n");

                currentIdx++;

                if (currentIdx == splitFileTotalLines) {

                    generateFileIdx++;

                    if (generateFileIdx != splitFileCount) {

                        currentIdx = 0;

                        bufferedWriter.flush();

                        bufferedWriter.close();

                    }

                }

            }

            if (bufferedWriter != null) {

                bufferedWriter.flush();

                bufferedWriter.close();

            }

        }

        reader.close();

        System.out.println("The total number of documents is:" + totalLine);

    }

}