Java读取Txt文件
程序员文章站
2022-06-09 22:34:43
...
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]; } }