文件读写&文件夹遍历

标签：文件读写   文件夹遍历   

文件读写

读文件(行)

	private void readFile(File file) throws IOException {
		FileInputStream stream = null;
		stream = new FileInputStream(file);

		DataInputStream sysin = new DataInputStream(stream);
		String line = null;

		while ((line = sysin.readLine()) != null) {
			if (line.trim().equals("")) {
				continue;
			}
			System.out.println(line);
		}
	}

写文件

public void write(String filePath) throws IOException {
		File file = new File(filePath);
		if (!file.exists())
			file.createNewFile();
		FileOutputStream out = new FileOutputStream(file, false);
		String data = "aa\nbb";
		out.write(data.toString().getBytes("utf-8"));
		ParsePclntResult obj = new ParsePclntResult();
	}

递归删除指定文件夹下的文件（遍历文件）

private void cleanupRecursive(File file) {
		try {
			if (file.isDirectory()) {

				for (File child : file.listFiles()) {
					cleanupRecursive(child);
				}
				if (file.listFiles().length == 0) {
					file.delete();
				}
			} else {

				if (file.getName().endsWith(".xls")) {
					file.delete();
				}
			}
		} catch (Exception e) {
			System.out.println(e.getMessage() + "\nFile:" + file.getAbsolutePath());
		}

	}

文件读写&文件夹遍历

标签：文件读写   文件夹遍历   

原文地址：http://blog.csdn.net/tiankefeng19850520/article/details/45274139