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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());		}	}

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