Question

我有一个String，其中包含一些单词。单词用花括号括起来。我想过滤掉所有单词并将其存储在数组中。 String在下面。

String messages="Dear {GUEST_TITLE} {GUEST_FIRST_NAME} {GUEST_LAST_NAME}, Your reservation no {RESERVATION_NUMBER};

Answer 1

使用正则表达式来完成；

Pattern CURLY_DELIMITER_REGEX = Pattern.compile("\\{(\\w+)\\}");
String messages = "Dear {GUEST_TITLE} {GUEST_FIRST_NAME} {GUEST_LAST_NAME}, Your reservation no {RESERVATION_NUMBER}";
Matcher matcher = CURLY_DELIMITER_REGEX.matcher(messages);
while (matcher.find()) {
    String value = matcher.group(1);
    System.out.println(value);
}

Answer 2

您可以尝试以下操作：

首先用空""替换所有花括号和逗号，然后用空格" "分隔

String messages="Dear {GUEST_TITLE} {GUEST_FIRST_NAME} {GUEST_LAST_NAME}, Your reservation no {RESERVATION_NUMBER}";
char[] charr  = messages.replaceAll("[}{,]","").split(" "); 
System.out.println(Arrays.toString(charr));

输出

[Dear, GUEST_TITLE, GUEST_FIRST_NAME, GUEST_LAST_NAME, Your, reservation, no, RESERVATION_NUMBER]

Answer 3

import java.util.*;

public class Main
{
    public static void main(String[] args) {
        String messages="Dear {GUEST_TITLE} {GUEST_FIRST_NAME} {GUEST_LAST_NAME}, Your reservation no {RESERVATION_NUMBER}";
        int len = messages.length();
        List<String> list = new ArrayList<>();
        for(int i=0; i< len; i++){
            if(messages.charAt(i) == '{'){
                int indexOfClosingBracket = messages.indexOf('}', i+1);
                list.add(messages.substring(i+1, indexOfClosingBracket));
                i = indexOfClosingBracket;
            }
        }

        for(String s : list){
            System.out.println(s);
        }
    }
}

你在这里...

Answer 4

您可以将RegEx与ArrayList一起使用：

List<String> result_array = new ArrayList<String>();
    int i = 0;
    Pattern CURLY_DELIMITER_REGEX = Pattern.compile("\\{(\\w+)\\}");
    String messages = "Dear {GUEST_TITLE} {GUEST_FIRST_NAME} {GUEST_LAST_NAME}, Your reservation no {RESERVATION_NUMBER}";
    Matcher matcher = CURLY_DELIMITER_REGEX.matcher(messages);
    while (matcher.find()) {
        result_array.add(matcher.group(1));
        i = i + 1;
    }
    System.out.print("Now the Result Array is :\n");
    for (String item : result_array) {
        System.out.println(item.toString());
    }

如何从字符串中过滤掉特殊词

4 个答案: