如何从java中的文件中读取字符串和数字？

1 回答

• 0

  您可以编写一个将读取文件并删除空格的类 .

  package com.example.removespaces
  
  import java.io.BufferedReader;
  import java.io.FileNotFoundException;
  import java.io.FileReader;
  import java.io.FileWriter;
  import java.io.IOException;
  
  
  public class RemoveSpacesInFileEx {
  
      public static void main(String[] args) throws FileNotFoundException, IOException {
  
          FileReader fr = new FileReader("input.txt"); 
          BufferedReader br = new BufferedReader(fr); 
          FileWriter fw = new FileWriter("outfile.txt"); 
          String line;
  
          while((line = br.readLine()) != null)
          { 
              line = line.trim();
              line=line.replaceAll("\\s+", " ");
              fw.write(line);
  
  
          }
          fr.close();
          fw.close();
      }
  
  }
  

  回复于 2024-05-03T03:24:18+08:00