java读取txt文件的方法有哪些

1. 使用FileReader和BufferedReader类：

try { File file = new File("filename.txt"); FileReader fr = new FileReader(file); BufferedReader br = new BufferedReader(fr); String line; while ((line = br.readLine()) != null) { System.out.println(line); } br.close(); fr.close(); } catch (IOException e) { e.printStackTrace(); } 

2. 使用Scanner类：

try { File file = new File("filename.txt"); Scanner scanner = new Scanner(file); while (scanner.hasNextLine()) { String line = scanner.nextLine(); System.out.println(line); } scanner.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } 

3. 使用Files类：

try { Path path = Paths.get("filename.txt"); List<String> lines = Files.readAllLines(path); for (String line : lines) { System.out.println(line); } } catch (IOException e) { e.printStackTrace(); }