java 我想读取一个文本文件，拆分它，并将结果存储在一个数组中
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I want to read a text file, split it, and store the results in an array
提问by Pratik
I have a text file which has 10 fields(columns)each separated by a tab.And i have several such rows.I wish to read the text file, split it for every column, using a "tab" delimiter and then storing it in an array of 10 columns and unlimited rows.Can that be done?
我有一个文本文件，它有 10 个字段（列），每个字段（列）由一个制表符分隔。我有几个这样的行。我希望读取文本文件，将其拆分为每一列，使用“制表符”分隔符，然后将其存储在一个包含 10 列和无限行的数组。可以这样做吗？
回答by Jon Skeet
An array can't have "unlimited rows" - you have to specify the number of elements on construction. You might want to use a Listof some description instead, e.g. an ArrayList.
数组不能有“无限行” - 您必须在构造时指定元素数。您可能希望使用List某种描述的 a 代替，例如 a ArrayList。
As for the reading and parsing, I'd suggest using Guava, particularly:
至于阅读和解析，我建议使用Guava，特别是：
(That lets you split the lines as you go... alternatively you could use Files.readLinesto get a List<String>, and then process that list separately, again using Splitter.)
（这使您可以在进行时拆分行……或者，您可以使用Files.readLines获取List<String>，然后单独处理该列表，再次使用Splitter。）
回答by les2
BufferedReader buf = new BufferedReader(new FileReader(fileName));
String line = null;
List<String[]> rows = new ArrayList<String[]>();
while((line=buf.readLine())!=null) {
String[] row = line.split("\t");
rows.add(row);
}
System.out.println(rows.toString()); // rows is a List
// use rows.toArray(...) to convert to array if necessary
回答by fftk4323
Here is a simple way to load a .txt file and store it into a array for a set amount of lines.
这是加载 .txt 文件并将其存储到一组行数的数组中的简单方法。
import java.io.*;
public class TestPrograms {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
String conent = new String("da");
String[] daf = new String[5];//the intiger is the number of lines +1 to
// account for the empty line.
try{
String fileName = "Filepath you have to the file";
File file2 = new File(fileName);
FileInputStream fstream = new FileInputStream(file2);
BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
int i = 1;
while((conent = br.readLine()) != null) {
daf[i] = conent;
i++;
}br.close();
System.out.println(daf[1]);
System.out.println(daf[2]);
System.out.println(daf[3]);
System.out.println(daf[4]);
}catch(IOException ioe){
System.out.print(ioe);
}
}
}
