java生成随机大数据文件

package iie.udps.test;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.util.Random;

public class test {
	public static void main(String[] args) throws IOException {
		
		File file = new File("/mnt/sdd1/data/test.txt");
		if (!file.exists()) {
			file.createNewFile();
		}
		FileOutputStream fos = new FileOutputStream(file);
		OutputStreamWriter osw = new OutputStreamWriter(fos, "utf-8");
		BufferedWriter out = new BufferedWriter(osw);
		Random r = new Random(); 
		
		long i = 0L;
		while(i<3000000000L){
			i++;
			out.write(Integer.toString(r.nextInt(1000)));
			out.write(",");
			out.write(Integer.toString(r.nextInt(1000)));
			out.write(",");
			out.write(Integer.toString(r.nextInt(1000)));
			out.newLine();
			if(i%100000 ==0){
				out.flush();
			}			
		}		
		out.close();
		System.out.println("数据生成到"+file);
	}
}