IO操作

1、文件读取

	@Test
	public void testFileInputStream(){
		InputStream in = null;
		try {
			in = new FileInputStream("f:/a/hello.txt");
			int readCount = 0;
			byte[] buffer = new byte[1024];
			while((readCount = in.read(buffer, 0, 1024)) != -1){
				String str = new String(buffer,0,readCount);
				System.out.println(str);
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally{
			if(in != null){
				try {
					in.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}