我正在创建一个程序,它读取 .txt 文件的内容,它会验证该文件的内容,然后将其输出到一个格式良好的表格中。我的程序当前读取文件,然后输出内容,我正在尝试实现对所述文件内容的验证。
我现在将解释我的程序读取文件的方式:
.txt 内容:
firstname lastname
Gameone : 120 : 1428
Gametwo : 20 : 10
Gamethree : 90 : 800
Gamefour : 190 : 2001
Gamefive : 25 : 80
Gamesix : 55 : 862
txt 文件包含以下格式的数据:
{gamename} : {gamescore} : {minutesplayed}
要阅读我使用的.txt:
System.out.println("*FILE HAS BEEN LOCATED*");
System.out.println("*File contains: \n");
while(scan.hasNext())
{
a = scan.nextLine();
b = scan.nextLine();
c = scan.nextLine();
d = scan.nextLine();
e = scan.nextLine();
f = scan.nextLine();
g = scan.nextLine();
}
为了分割数据,我对从 a 到 g 的每个字母使用这个 for 循环,如下所示:
//~~~~a-line-split~~~~//
String[] aline;
aline = a.split(":");
for (int i=0; i<aline.length; i++)
{
aline[i] = aline[i].trim();
//System.out.println(aline[i]);
}
为了通过验证进行澄清,我需要通知用户一行中是否缺少数据,例如,如果第一行有:
gameone : {missing} : 1428
目前我对每一行都有这个简单的 if 语句:
if (bline.length < 3)
{
System.out.println("There is an error in row one!");
}
但是我需要程序准确地知道每行数据丢失的位置。不仅仅是一般性的回应:
System.out.println("There is an error in row one!");
而是类似以下内容:
System.out.println("There is data missing, row: 1 column: 2");
按要求提供完整代码:
package readfile;
import java.io.*;
import java.util.*;
public class readfile
{
public static void main(String[] args)
{
Scanner scan = new Scanner (System.in);
String FileN = " ";
String a = " ";
String b = " ";
String c = " ";
String d = " ";
String e = " ";
String f = " ";
String g = " ";
boolean fileExists = false;
File newFile = null;
while(!fileExists)
{
System.out.println("Enter the name of the file you want to open: ");
FileN = scan.nextLine();
newFile = new File(FileN);
fileExists = newFile.exists();
if (!fileExists)
{
System.out.println(FileN + " not found...");
}
}
try {
Scanner scan2;
scan = new Scanner(newFile);
}
catch(FileNotFoundException fnfe) {
System.out.println("sorry but the file doesn't seem to exist");
}
//++++++++++++++=FILE READ=++++++++++++++++++++
System.out.println("*FILE HAS BEEN LOCATED*");
System.out.println("*File contains: \n");
while(scan.hasNext())
{
a = scan.nextLine();
b = scan.nextLine();
c = scan.nextLine();
d = scan.nextLine();
e = scan.nextLine();
f = scan.nextLine();
g = scan.nextLine();
}
//+++++++++++++++ARRAYS FOR THE LINES+++++++++++++++++++
//~~~~A-LINE~~~~//
String[] aline;
aline = a.split(":");
for (int i=0; i<aline.length; i++)
{
aline[i] = aline[i].trim();
//System.out.println(aline[i]);
}
//~~~~B-LINE~~~~//
String[] bline;
bline = b.split(":");
for (int i=0; i<bline.length; i++)
{
bline[i] = bline[i].trim();
//System.out.println(bline[i]);
}
//~~~~C-LINE~~~~//
String[] cline;
cline = c.split(":");
for (int i=0; i<cline.length; i++)
{
cline[i] = cline[i].trim();
//System.out.println(cline[i]);
}
//~~~~D-LINE~~~~//
String[] dline;
dline = d.split(":");
for (int i=0; i<dline.length; i++)
{
dline[i] = dline[i].trim();
//System.out.println(dline[i]);
}
//~~~~e-LINE~~~~//
String[] eline;
eline = e.split(":");
for (int i=0; i<eline.length; i++)
{
eline[i] = eline[i].trim();
//System.out.println(eline[i]);
}
//~~~~f-LINE~~~~//
String[] fline;
fline = f.split(":");
for (int i=0; i<fline.length; i++)
{
fline[i] = fline[i].trim();
//System.out.println(fline[i]);
}
//~~~~g-LINE~~~~//
String[] gline;
gline = g.split(":");
for (int i=0; i<gline.length; i++)
{
gline[i] = gline[i].trim();
//System.out.println(gline[i]);
}
String user = aline [0];
//~~~~~~~~~GAME NAMES~~~~~~~~~~~~~//
//GTA
String gameone = bline [0];
//MINECRAFT
String gametwo = cline [0];
//ASSASSIN'S CREED IV
String gamethree = dline [0];
//PAYDAY2
String gamefour = eline [0];
//WOLFENSTEIN
String gamefive = fline [0];
//FARCRY 4
String gamesix = gline [0];
//~~~~~~~~~~Achievement Score~~~~~~~~~~~~//
//GTA SCORE
String scoreone = bline [1];
//MINECRAFT SCORE
String scoretwo = cline [1];
//ASSASSIN'S CREED IV SCORE
String scorethree = dline [1];
//PAYDAY2 SCORE
String scorefour = eline [1];
//WOLFENSTEIN SCORE
String scorefive = fline [1];
//FARCRY 4 SCORE
String scoresix = gline [1];
//+++++++++++++++++++++TOTAL~~CALC++++++++++++++++++++++//
double totalcount = 79.566; // change to the amount played.
int totalhours = (int)totalcount;
int totalmin = (int)(totalcount*60)%60;
int totalsec = (int)(totalcount*(60*60))%60;
System.out.println("TOTAL TIME PLAYED:");
System.out.println(String.format("%s(hours) %s(minutes) %s(seconds)",
totalhours, totalmin, totalsec));
//~~~~~~~~~~Minutes Played~~~~~~~~~~~~//
//GTA min
String minone = bline [2];
//MINECRAFT min
String mintwo = cline [2];
//ASSASSIN'S CREED IV min
String minthree = dline [2];
//PAYDAY2 min
String minfour = eline [2];
//WOLFENSTEIN min
String minfive = fline [2];
//FARCRY 4 min
String minsix = gline [2];
//~~~~~~~~~GAMES TEST~~~~~~~~~~~~//
System.out.println("\nUSER: "+user);
System.out.println("\nDATA: ");
System.out.println("1: "+gameone+" | score: "+scoreone+"
| minutes played: "+minone);
System.out.println("2: "+gametwo+" | score: "+scoretwo+"
| minutes played: "+mintwo);
System.out.println("3: "+gamethree+" | score: "+scorethree+"
| minutes played: "+minthree);
System.out.println("4: "+gamefour+" | score:
"+scorefour+" | minutes played: "+minfour);
System.out.println("5: "+gamefive+" | score: "+scorefive+"
| minutes played: "+minfive);
System.out.println("6: "+gamesix+" | score: "+scoresix+"
| minutes played: "+minsix);
if (bline.length < 3)
{
int column = 0;
for(int i = 0; i<bline.length; i++){
column = i;
if(bline[i] == null || bline[i].trim() == ""){
System.out.println("There is an error in row two
column "+(i+1));
}
}
}
}
}
最佳答案
if (bline.length < 3)
{
int column = 0;
for(int i = 0; i<bline.length; i++){
column = i;
if(bline[i] == null || bline[i].trim() == ""){
System.out.println("There is an error in row two column "+(i+1));
}
}
}
没有测试过,但应该可以
编辑:
查看完整代码 bline[2]、cline[2]...
等,如果第一个文件中缺少这些值,则会出现“索引越界”异常因此,在进行调用之前,您应该首先进行检查,您可以创建一个静态方法来进行检查
public static String getAtIndex(String[] array, int indexToCkeck){
if(indexToCkeck >=array.length){
return "";
}
else{
return array[indexToCkeck];
}
}
因此,不要使用 bline[2], cline[2] ...
使用 readfile.getAtIndex(bline, 2)
这样如果信息丢失它将返回一个空字符串
还没有测试过,不过应该没问题
关于java - 如何在 Java 中验证文本文件内容?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/47220687/