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());}}