Java读取Txt文件

java读取txt文件的内容 类

 

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];
    }
}