Java扫描程序类从文本文件读取制表符分隔的字符串

Question

I am a student learning Java coding. I am trying to check a username and password within a text file. If the text file contains the username, then the 3 next fields are assigned to variables.

The text file has 4 tab-delimited fields and 5 unique lines.

If I enter the username and password from the first line of a text file, then I can get boolean values to return true. If I enter any other username or password the boolean values remain false. I use a print method and can tell that the while loop iterates thru the entire file.

I'm trying to figure out why the other lines of the text files aren't being compared to the username or password variables.

My code:

while (inFS.hasNext() && !userGood && !passGood) {
    credString = inFS.next();
    System.out.println(credString);

    if (userName.equals(credString)) {
        userGood = true;
        System.out.println("*****userGood TRUE");
        encryptedPass = inFS.next();
        unencryptedPass = inFS.next();
        userRole = inFS.next();
        if (sb.toString().equals(encryptedPass)){
            passGood = true;
            System.out.println("*****passGood TRUE");
            break;
      }                                                           
 }                       

}

Answer 1

问题在于next（）方法不会跳过一行，因此您应该在进行下一个while迭代之前进行nextLine（）调用。