Java使用FileOutputStream输出数据到文件

import java.io.FileOutputStream;
import java.io.IOException;

public class FileOutputStreamCls01 {
    public static void main(String[] args) {
        writeFile();
    }

    //使用FIleOutputStream将数据写到文件中
    //如果文件不存在则创建文件
    public static void writeFile(){
        //创建FIleOutputStream对象
        String filePath = "d:\a.txt";
        FileOutputStream fileOutputStream = null;

        try {
            fileOutputStream = new FileOutputStream(filePath);
            //fileOutputStream = new FileOutputStream(filePath，true);追加
            fileOutputStream.write(H);
            //写入字符串
            String str = "hello,world!";
            fileOutputStream.write(str.getBytes());
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                fileOutputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}