学步园

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：

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

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