Io流FileOutputStream的使用

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
@SuppressWarnings("all")
public class FileOutputStream1 {
	public static void main(String[] args) {
		FileOutputStream fos = null;//字节流
		try {
			fos = new FileOutputStream("D://test//haha.txt");
			String s = "我好慌嘤嘤嘤！";
			byte[] b = s.getBytes();//字符串提取字节
			try {
				//从0开始写出，所有的字符
				fos.write(b,0,b.length);
				fos.flush();//把缓冲区的数据强行输出
				System.out.println("成功！");
			} catch (IOException e) {
				System.out.println("创建文件时出错：" + e.getMessage());
			}finally {
				try {
					if(fos != null) {
						fos.flush();
					    fos.close();//关闭流，释放资源
					}
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}

}