java随机读取文件

package split;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.io.RandomAccessFile;

public class Split {

	public static String file_path = "D:\\学习\\实验室项目\\ImageNet图片爬取\\fall11_urls.txt";

	public static String file_path_1 = "D:\\学习\\实验室项目\\ImageNet图片爬取\\split\\1.txt";

	static long originFileSize = 1024 * 1024 * 100;// 100M

    static int blockFileSize = 1024 * 1024 * 1;// 15M

	public static void main(String[] args) {

		// TODO Auto-generated method stub

		split();

	}

	public static void split(){

		RandomAccessFile rFile;

        OutputStream os;

        try {

            rFile = new RandomAccessFile(file_path, "r");

            int count = (int) Math.ceil(rFile.length() / (double) blockFileSize);

            byte[] b = new byte[1000];

            rFile.seek(count);// 移动指针到每“段”开头

            int s = rFile.read(b);

            os = new FileOutputStream(file_path_1);

            os.write(b, 0, s);

            os.flush();

            os.close();

        } catch (IOException e) {

            e.printStackTrace();

        }

	}

}
巴特西

java随机读取文件

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