java取出指定行数文本，包括从M行到N行

夜深了，写个程序提神。

测试txt路径：C：/testlog.txt，内容如下：

23:25:37 VirtualDisk - couldn't load BBArchive.dll - 126
23:29:37 VirtualDisk - couldn't load BBArchive.dll - 126
22:29:12 VirtualDisk - couldn't load BBArchive.dll - 126
22:35:17 VirtualDisk - couldn't load BBArchive.dll - 126
qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq
wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
lllllllllllllllllllllllllllllllllllllllll
iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn

测试代码：

/* * $RCSfile: Test.java,v $ * $Revision: 1.1 $ * $Date: 2009-2-20 $ * * Copyright (C) 2005 Bettem, Inc. All rights reserved. * * This software is the proprietary information of Bettem, Inc. * Use is subject to license terms. */ package servlet; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.util.ArrayList; import java.util.List; /** * <p> * Title: Test * </p> * <p> * Description: * </p> * <p> * Copyright: Copyright (c) 2006 * </p> * * @author 李晗 * @version 1.0 */ public class Test { /** * @param args */ /** * 读取txt内容到数组 */ public static String[] getTxtContent(String path) { File f = null; String[] a = null; try { a = new String[100000]; f=new File(path); InputStreamReader read = new InputStreamReader(new FileInputStream(f), "GBK"); BufferedReader reader = new BufferedReader(read); String line; int i; for (i = 0; i < 100000; i++) { if ((line = reader.readLine()) != null) { a[i] = line; } } } catch (UnsupportedEncodingException e) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return a; } /** * 读取指定一行内容 * @param path * @param row * @return */ public String listTxtByRow1(String path,Integer row) { String[] s = getTxtContent(path); return "第"+row+"行："+s[row-1]; } public List<String> listTxtByRow2(String path,Integer start,Integer end) { List<String> list =new ArrayList<String>(); String[] s = getTxtContent(path); for(int i = start;i <= end;i++) { list.add(s[i-1]); } return list; } public static void main(String[] args) { Test t = new Test(); System.out.println(t.listTxtByRow1("C:/testlog.txt",6));//取出第6行数据 System.out.println("==================取出指定行数====================="); List<String> list = t.listTxtByRow2("C:/testlog.txt", 2, 5);//取出2-5行数据 for(int i = 0;i<list.size();i++) { System.out.println(list.get(i)); } } }

运行情况：

第6行：wwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
==================取出指定行数=====================
23:29:37 VirtualDisk - couldn't load BBArchive.dll - 126
22:29:12 VirtualDisk - couldn't load BBArchive.dll - 126
22:35:17 VirtualDisk - couldn't load BBArchive.dll - 126
qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq