java读取txt文件中的数据

原文链接：http://www.cnblogs.com/qingblog/archive/2012/07/06/2579404.html

 

1 . package txt;
2 .
3 . import java.io.BufferedReader;
4 . import java.io.File;
5 . import java.io.FileInputStream;
6 . import java.io.InputStreamReader;
7 .
8 . /**
9. * 读取TXE数据
10. */
11 . public class ReadTxtUtils {
12 .    public static void main(String arg[]) {
13 .        try {
14 .            String encoding = "GBK" ; // 字符编码(可解决中文乱码问题 )
15 .            File file = new File( "c:/aa.txt" );
16 .            if (file.isFile() && file.exists()) {
17 .                InputStreamReader read = new InputStreamReader(
18 .                        new FileInputStream(file), encoding);
19 .                BufferedReader bufferedReader = new BufferedReader(read);
20 .                String lineTXT = null ;
21 .                while ((lineTXT = bufferedReader.readLine()) != null ) {
22 .                     System.out.println(lineTXT.toString().trim());
23 .                }
24 .                read.close();
25 .            } else {
26 .                System.out.println( "找不到指定的文件！" );
27 .            }
28 .        } catch (Exception e) {
29 .            System.out.println( "读取文件内容操作出错" );
30 .            e.printStackTrace();
31 .        }
32 .    }
33 .}

 java读取TXT文件中的数据，每一行就是一个数，返回一个数组，代码？

List list= new ArrayList();
BufferedReader br= new BufferReader( new InputStreamReader( new FileInputStream( new File( "in.txt" ))));
String str= null ;
while ((str=br.readLine())!= null )
{
list.add( new Integer(str));

}
Integer[] i= new Integer[list.size()];
list.toArray(i);

 TXT文本中如据形如：
123
456
789

读入二维数组效果为：
temp[0][]={1,2,3};
temp[1][]={4,5,6};
temp[2][]={7,8,9};

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.*;


public class xx{
    public static void main(String[]args){
        String s;
        int[][]save=new int[3][3];
        try{
        BufferedReader in =new BufferedReader(new FileReader("C:\\txt.txt"));
        int i=0;
        while((s=in.readLine())!=null){
            save[i][0]=Integer.parseInt(s.substring(0,1));
            save[i][1]=Integer.parseInt(s.substring(1,2));
            save[i][2]=Integer.parseInt(s.substring(2,3));
            i++;
        }
        }
        catch(FileNotFoundException e){
            e.printStackTrace();
        }
        catch(IOException e){
            e.printStackTrace();
        }
        for(int i=0;i<3;i++)
        {
            for(int j=0;j<3;j++){
                System.out.print(save[i][j]);
            }
            System.out.println();
        }
    }
}

或

BufferedReader bf= new BufferedReader( new FileReader( "Your file" ));
String lineContent= null ;
int i = 0 ;
int [][] temp = new int [ 3 ][];
        while ((lineContent=bf.readLine())!= null ){
            String [] str = lineContent.split( "\\d" ); // 将 lineContent 按数字拆分
for ( int j = 0 ; j < str.length(); j++){
int [i][j] = Integer.parseInt(str[j]);
}
i++;
        }

 scp|cs|ff|201101
这是d:\\a.txt的数据，与“|”分割取数据出来，保存在变量a;b;c;d里

import java.io.*;

public class Test{ 
  public static void main(String[] args)throws Exception{
       String a, b, c, d;
    StringBuffer sb = new StringBuffer();
    BufferedReader br = new BufferedReader(new FileReader("d:\\a.txt"));
    String s = br.readLine();
    while(s != null){
            sb.append(s);
            s = br.readLine();
        }
        s = sb.toString();
        String[] str = s.split("|");
        a = str[0];
        b = str[0];
        c = str[0];
        d = str[0];
    }
}