使用BufferedReader读取文件

import java.io.BufferedReader;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException;import java.io.InputStreamReader;/** * Read a file and print, using BufferedReader and System.out */public class CatFile { public static void main(String[] av) { CatFile c = new CatFile(); if (av.length == 0) c.process(new BufferedReader(new InputStreamReader(System.in))); else for (int i = 0; i < av.length; i++) try { c.process(new BufferedReader(new FileReader(av[i]))); } catch (FileNotFoundException e) { System.err.println(e); } } /** print one file, given an open BufferedReader */ public void process(BufferedReader is) { try { String inputLine; while ((inputLine = is.readLine()) != null) { System.out.println(inputLine); } is.close(); } catch (IOException e) { System.out.println("IOException: " + e); } }}