從文本文件讀取數據並使用Java進行驗證

Question

從文本文件驗證數據時遇到問題。我只能驗證我的身份證號碼，只有其他字段無效。

下面是我的Java代碼：

public void readBorrowerData() { 
String fnm="", snm="", pcd=""; 
int num=0, id=1; 
try { 
    Scanner scnr = new Scanner(new File("borrowers.txt")); 
    scnr.useDelimiter("\\s*#\\s*"); 
    if(id < 0 || snm == null || fnm == null || num < 0){ 
     JOptionPane.showMessageDialog(this, "Try again", "Error", JOptionPane.ERROR_MESSAGE); 
    } else { 
     while (scnr.hasNextInt()) { 
      id = scnr.nextInt(); 
      snm = scnr.next(); 
      fnm = scnr.next(); 
      num = scnr.nextInt(); 
      pcd = scnr.next(); 
      borrowers.put(new Integer(id), new Borrower(id, snm, fnm, num, pcd)); 
     } 
    } 
    scnr.close(); 
} catch (NoSuchElementException e) { 
    System.out.printf("%d %s %s %d %s\n", id, snm, fnm, num, pcd); 
    JOptionPane.showMessageDialog(this, e.getMessage(), 
     "fetch of next token failed ", JOptionPane.ERROR_MESSAGE); 

Answer 1

不要scnr.next()混合scnr.nextInt()。改爲使用I'd = Integer.parseInt(scnr.next());。很抱歉，如果不是這種情況