文件的写入及读取及删除

写入：writeToFile

读取：getContent

删除文件：delFile

删除文件夹：delFolder

删除文件夹及其内容：delAllFile

/**
	 * 将内容字段存到文本文件中去
	 * 
	 * @param fileList
	 */
	private void writeToFile(List<Map<String, String>> fileList) {
		BufferedWriter demoWriter;
		// 存入文档
		for (int i = 0; i < fileList.size(); i++) {
			String key = fileList.get(i).get("id") + "_" + fileList.get(i).get("content");
			// 得到文件路径
			String filePath = fileList.get(i).get("filePath");
			try {
				File file = new File(filePath);
				File fileParent = file.getParentFile();
				if (!fileParent.exists()) {
					fileParent.mkdirs();
				}
				if (!file.exists()) {
					file.createNewFile();
				}
				// 写数据
				demoWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(filePath, true), "utf-8"));
				demoWriter.write(key + "\n");
				demoWriter.close();
			} catch (IOException e) {
				LOG.error(String.format("内容文件保存异常， 异常信息为：%s", e.getMessage()));
			}

		}
	}
    /**
	 * 得到文章内容
	 * 
	 * @param id
	 * @param historyKeysPath
	 * @return
	 * @throws IOException
	 */
	private String getContent(Long id, String historyKeysPath) throws IOException {
		String content = null;

		// 得到文件路径
		// String historyKeysPath="D:\\"+year+File.separator+month+File.separator+day+"\\weibo.txt";
		// 根据id读取文件内容
		// String historyKeysPath="test_weibo.txt";
		File historyFile = new File(historyKeysPath);
		if (historyFile.exists()) {
			FileInputStream fis = new FileInputStream(historyKeysPath);
			BufferedReader reader = new BufferedReader(new InputStreamReader(fis, "utf-8"));
			String line;
			while ((line = reader.readLine()) != null) {
				// System.out.println("line:"+line);
				if (line.split("_")[0].equalsIgnoreCase(String.valueOf(id))) {
					content = line.split("_")[1];
				}
			}
			reader.close();
		}
		return content;
	}
/**
	 * 删除文件
	 * 
	 * @param fileName
	 *            文件名称
	 * @return
	 */
	public static boolean delFile(String filePath) {
		Boolean bool = false;
		// filenameTemp = path+fileName+".txt";
		File file = new File(filePath);
		try {
			if (file.exists()) {
				file.delete();
				bool = true;
			}
		} catch (Exception e) {
		}
		return bool;
	}

	

/**
	 * 删除文件夹
	 * 
	 * @param folderPath
	 */
	private static void delFolder(String folderPath) {
		try {
			delAllFile(folderPath); // 删除完里面所有内容
			String filePath = folderPath;
			filePath = filePath.toString();
			java.io.File myFilePath = new java.io.File(filePath);
			myFilePath.delete(); // 删除空文件夹
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 删除指定文件夹下的所有文件
	 * 
	 * @param path
	 * @return
	 */
	private static boolean delAllFile(String path) {
		boolean flag = false;
		File file = new File(path);
		if (!file.exists()) {
			return flag;
		}
		if (!file.isDirectory()) {
			return flag;
		}
		String[] tempList = file.list();
		File temp = null;
		for (int i = 0; i < tempList.length; i++) {
			if (path.endsWith(File.separator)) {
				temp = new File(path + tempList[i]);
			} else {
				temp = new File(path + File.separator + tempList[i]);
			}
			if (temp.isFile()) {
				temp.delete();
			}
			if (temp.isDirectory()) {
				delAllFile(path + "/" + tempList[i]);// 先删除文件夹里面的文件
				delFolder(path + "/" + tempList[i]);// 再删除空文件夹
				flag = true;
			}
		}
		return flag;
	}