需求：現要統計一個文字檔案中每一行字串出現次數

public static HashMap<String, Integer> analysizeFile(File file) {
	HashMap<String, Integer> res = new HashMap<String, Integer>();
	BufferedReader br = null;
	try {
		br = new BufferedReader(new FileReader(file));
		String readLine = null;
		while ((readLine = br.readLine()) != null) {
			Integer ret = new Integer(0);
			if (res.containsKey(readLine))
				ret = res.get(readLine);
			res.put(readLine, ret + 1);
		}
		return res;
	} catch (Exception e) {
		e.printStackTrace();
	} finally {
		try {
			br.close();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	return null;
}