如何使用 Java 在正则表达式中检查多个 [args]? [英] How do I check for multiple [args] in a regex with Java?

问题描述

我正在制作一个控制台游戏.. 我希望能够同时检查 2 个人的信息.就我而言，我想制作一个kill checker"命令.命令是

I am making a console game.. and I want to be able to check for 2 people's information at the same time. In my case, I want to make a "kill checker" command. The command is

~killc [username]

使用此命令，我将能够检查 1 人的杀戮次数.如果我想检查 2 个人怎么办?我将如何使用我的 .matches(regex) 来计算 2 个字符串?我试过打字:

With this command, I would be able to check 1 person's kills. What if I want to check 2 people? How would I use my .matches(regex) to figure 2 Strings? I have tried typing:

"^~killc [^ ] [^ ]+$", and "^~killc [^ ] + [a-zA-Z]+$"

但它们不起作用.阅读下面的代码以了解更多信息.

but they don't work. Read my code below for more information.

import java.util.Scanner;
class StackOverflowExample {
  static int kills = 10;
  public static void main(String[] args) {
    
    System.out.println("Kill count command: ~killc [username]");
    Scanner userInt = new Scanner(System.in);
    String userInput = userInt.nextLine();
    if (userInput.matches("^~killc [^ ]+$"/**How would I input more than one username?**/)){
      String[] parts = userInput.split(" ");
      String username = parts[1];
      System.out.printf("%s has " + kills + " kills.",username);
      
    }
    
  }
}

推荐答案

您可以将模式与捕获组一起使用，并将捕获组的值拆分为一个空间.

You could use a pattern with a capture group, and split the value of the capture group on a space.

^~killc (\S+(?: \S+)*)$

• ^ 字符串开始
• ~killc\h+ 匹配 ~killc 和 1+ 个空格
• ( 捕获组1
  • \S+(?:\h+\S+)* 匹配 1+ 个非空白字符，并可选择重复 1+ 个空格和 1+ 个非空白字符
  • ^ Start of string
  • ~killc\h+ Match ~killc and 1+ spaces
  • ( Capture group 1
    • \S+(?:\h+\S+)* Match 1+ non whitspace chars, and optionally repeat 1+ spaces and 1+ non whitspace chars

    正则表达式演示

    System.out.println("Kill count command: ~killc [username]");
    Scanner userInt = new Scanner(System.in);
    String regex = "^~killc\\h+(\\S+(?:\\h+\\S+)*)$";
    String userInput = userInt.nextLine();
    
    Pattern pattern = Pattern.compile(regex);
    Matcher matcher = pattern.matcher(userInput);
    
    if (matcher.find()) {
        for (String username : matcher.group(1).split(" "))
            System.out.printf("%s has " + kills + " kills.\n",username);
    }
    

    如果输入的是~killc test1 test2

    输出将是

    Kill count command: ~killc [username]
    test1 has 10 kills.
    test2 has 10 kills.
    

    Java 演示

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