文件操作！

//读文件转成字符串！
	public static String fileToString(String fileName) throws IOException {

		String lineContent = null;// 
		StringBuffer str = new StringBuffer();
		FileReader fr;
		try {
			fr = new FileReader(fileName);
			BufferedReader br = new BufferedReader(fr);//
			lineContent = new String();
			lineContent = br.readLine().trim();
			do {
				str.append(lineContent.trim());
			} while ((lineContent = br.readLine()) != null);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return str.toString();
	}