Question

我很难让我的程序读取文本文件并找到num与wrkID的匹配项，因此它可以打印出相关信息。

文本文件如下所示。数字455和367是wrkID，我正在尝试获取我输入的数字以匹配：

Corner street^3^455^Collin^Sydney
David street^2^367^Spence^Sydney

public class Work
{
   public static void main(String[] args) throws IOException
   {
      Scanner Keyboard = new Scanner(System.in);
      System.out.print("Enter filename >> ");
      String response = Keyboard.nextLine();
      File inFile = new File(response);
      Scanner wrk = new Scanner(inFile);
      System.out.print("Enter job ID >> ");
      int num = Keyboard.nextInt();

      while (route.hasNextLine())
      {
          String Street = wrk.nextLine();
          int stopNum = wrk.nextInt();
          int wrkID = wrk.nextInt();
          String road = wrk.nextLine();
          String town = wrk.nextLine();
          if(wrkID == num)
          {
            System.out.println("work id and street:  " + trkID + Street);
          }
       }
    }
}

Answer 1

问题在这里：

      String Street = wrk.nextLine();
      int stopNum = wrk.nextInt();
      int wrkID = wrk.nextInt();
      String road = wrk.nextLine();
      String town = wrk.nextLine();

当你调用wrk.nextLine（）时，它将整个第一行文本分配到String street ... 如果你只需要整数，那么只需使用nextInt（）;

就可以丢弃其他输入

Answer 2

如果给定的输入匹配，则应打印整行。

  public static void main(String[] args) throws IOException
  {

   Scanner Keyboard = new Scanner(System.in);
      System.out.print("Enter filename >> ");
      String response = Keyboard.nextLine();
   File file = new File(response);
   try {
     BufferedReader br = new BufferedReader(new FileReader(file));
      System.out.print("Enter job ID >> ");
      String num = Keyboard.nextLine();
     String line;
     while ((line = br.readLine()) != null) {
         String[] splitData = line.split("\\^");
         for(String data:splitData){
         if (data.equalsIgnoreCase(num))  {
            System.out.println(line);
         }
         }
     }

   } catch (FileNotFoundException e) {
       e.printStackTrace();
   } catch (IOException e) {
       e.printStackTrace();
   }
 }

搜索文本文件以匹配整数

2 个答案: