取出指定行数文本包括从M行到N行代码,Java代码库,德仔网

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【Java】取出指定行数文本包括从M行到N行

作者:lihan6415151528 / 发布于2014/2/8/ 513

/*
* $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;

/**
* 
* Title: Test
* 
* 
* Description:
* 
* 
* Copyright: Copyright (c) 2006
* 
*
* @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));
  }
  
 }
}

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