Question

我从哈希图开始，我想尝试包含来自csv文件的数据，而不是仅仅手动输入所有值。有帮助吗？

这是用于向体育场和城镇输入球队。它可以手动输入

import java.util.HashMap; 
import java.util.Scanner;
public class hashTutorial1 {
public static void main(String[] args) {
HashMap<String, String> teamLocations = new HashMap<String, String>();
HashMap<String, String> teamStadiums = new HashMap<String, String>();
String team;
String town;
String stadium;
int cont;
Scanner scan = new Scanner(System.in);
for(int i=0;i>=0;i++){
          if((i%2==0)&&(i!=0)  ){
              System.out.println(i+" "+"teams have been entered. Enter 0 to stop");
              cont = scan.nextInt();
              if(cont==0){
                  System.out.println("ending  input");
              break;
              }else{
                  System.out.println("input resuming");
              }
            }
          System.out.println("Enter a team");
          team=scan.nextLine();
          System.out.println("Enter its local town");
          town=scan.nextLine();
          System.out.println("Enter its stadium");
          stadium=scan.nextLine();
          teamLocations.put(team, town);
          teamStadiums.put(team, stadium);
    }
for (String i : teamLocations.keySet()) {
  System.out.println("TEAM: " + i + " TOWN: " + teamLocations.get(i) + " STADIUM: " + teamStadiums.get(i));

}

    }

}

我希望将输出球队名称，体育场和城镇。

Answer 1

具有类似csv的结构

team;town;stadium

您可以使用BufferedReader的{{1}}逐行读取文件，然后使用readLine()的{{1}}获得以下数组：String 。然后，您可以将结果存储在这样的HashMap中（假设该数组称为array）：

split(";")

带有哈希图的CSV

1 个答案: