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();
        }
	}
}