Java读取本地文件指定行数示例：操作C:/testlog.txt

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