java流操作总结

java流操作总结

1.控制台读取，控制台输出

		
	/**
	 * 该类只操作文本文件,支持在文本后追加
	 */
	public static void saveFile2File01(String fileFromDir, String fileToDir) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(fileFromDir), System.getProperty("file.encoding")));
		BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(fileToDir, true), System.getProperty("file.encoding")));
		while (br.readLine() != null) {
			bw.write(br.readLine());
                           bw.newLine();
		}
		bw.close();
		br.close();
	}

2.读取文件，输出到另一个文件

	/**
	 * 该类可操作任何文件
	 */
	public static void saveFile2File02(String fileFromDir, String fileToDir) throws Exception {
		FileInputStream fi = new FileInputStream(fileFromDir);
		FileOutputStream fo = new FileOutputStream(fileToDir);
		byte[] bytes = new byte[1024];
		int len = 0;
		while ((len = fi.read(bytes)) != -1) {
			fo.write(bytes, 0, len);
		}
		fi.close();
		fo.close();
	}