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);
    }
}