java _io_ file output

1, to create the source
2, select stream
3, operation (write)
4, flush the cache, the data to avoid the presence of memory
5, the release of resources

File f = new File ( "D : /d/t.txt"); // file does not exist automatically creates a flow stream
OutputStream os = new FileOutputStream (f, true) // add Boolean true, will open an additional mode,
The default is false.
byte [] data = s.getBytes () // encoding
os.write (byte [] data) // write the contents of the byte array
os.write (byte [] data, 0 , length) // write the index 0 content length position offset length

public class test{

public static void main(String[]args) 
{
    //创建源
    File f =new File("D:/d/t.txt");  //文件不存在stream流会自动创建
    //选择流
    OutputStream os =null;
    try {
        os =new FileOutputStream(f,true);
        //os =new FileOutputStream(f,true);  //添加布尔类型true ,将会开启追加模式
        //操作(写出),通过字节数组写出
        String s="hello world";

        byte[] data=s.getBytes();
        try {
            //os.write(data);
            os.write(data,0,data.length);
            //刷新数据，避免数据驻留在内存中
            os.flush();
        } catch (IOException e) 
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
    catch(FileNotFoundException e)
    {
        e.printStackTrace();
    }
    finally {
        //释放资源
        try {
            if(null!=os)
            {
                os.close();
            }
        }catch(IOException e)
        {
            e.printStackTrace();
        }

    }

} 

}