import java.io.*;
/*个人总结：这种方法的缺点是不能正常读取中文！～*/
publicclass DataStream {
publicstaticvoid main(String[] args) throws Exception{
if(args.length == 0){
   System.out.print("Argument of filename");
   System.exit(0);
}

  String filename = args[0];
/* 写 入 文 件 */
  FileOutputStream fos = new FileOutputStream(filename);
  DataOutputStream dos = new DataOutputStream(fos);
  String line = "文件写入中。。。";
  dos.write(line.getBytes());
  dos.close();

/* 读 出 文 件 内 容 */
  FileInputStream fis = new FileInputStream(filename);
  DataInputStream dis = new DataInputStream(fis);

int i;
while((i = dis.read()) != -1){
   System.out.print((char)i);
}
}
}