import java.io.*;

public class UseFileOutputStream

{

public static void main(String[] args)

{

byte buf[] = new byte[255];

byte bufIn[] = new byte[255];

try

{

String str = "你好,这是已有的文本";

buf = str.getBytes();

// 创建文件输出对象

FileOutputStream fileOut = new FileOutputStream("Hello.txt");

// 写入文件

fileOut.write(buf, 0, buf.length);

fileOut.flush();

fileOut.close();

System.out.println("\n请输入一行文本: ");

// 从键盘接收文本

int bytes = System.in.read(bufIn, 0, 255);

// 追加文本

fileOut = new FileOutputStream("Hello.txt", true);

fileOut.write(bufIn, 0, bytes);

}

catch(IOException e)

{

System.out.println(e.getMessage());

}

}

}