字符串正则表达式无法拆分右括号中的单词

Question

我正在使用字符串正则表达式来拆分以下字符串

String input = "( Customer.browse == \"Car Loan\" ) AND ( Campaign.period BETWEEN 2400 AND 600 ) "
            + "AND ( Customer.eligibity == TRUE ) AND ( Campaign.campaign_name == \"Browse To Start\") "
            + "AND ( Customer.application_started == \"Car Loan\" ) AND ( Time.currenttime BETWEEN 800 AND 2000 ) "
            + "THEN ( Notification.message == SUPPRESS)";

我的字符串分词器 class 如下

import java.util.ArrayList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

    public class StringRegexClass {

        public ArrayList<String> stringTokenizer(String str) {

            ArrayList<String> tokenList = new ArrayList<String>();
            Pattern pattern = Pattern.compile("[(\")]|\w+.\w+.\w+|\w+.\w+|==");
            Matcher matcher = pattern.matcher(str);
            while (matcher.find()) {
                tokenList.add(matcher.group());
            }
            return (tokenList);
        }
    }

当我将字符串传递给上面的 class

时，我得到如下输出

我想拆分括号 ( Time.currenttime BETWEEN 800 AND 2000 ) and ( Campaign.period BETWEEN 2400 AND 600 ) 中的字符串，如下所示

我尝试了不同的方法 none 它起作用了你能建议我需要对我的正则表达式进行哪些更改才能使其起作用吗

Answer 1

我建议您完整捕获引用的字符串。

您需要转义 .

您可以使用以下正则表达式，但请注意它会自动跳过任何它无法识别的内容：

[()]|"[^"]*"|\w+(?:\.\w+)?|==

在Java 4+:

public static List<String> stringTokenizer2(String str) {
    List<String> tokenList = new ArrayList<>();
    Pattern pattern = Pattern.compile("[()]|\"[^\"]*\"|\w+(?:\.\w+)?|==");
    for (Matcher matcher = pattern.matcher(str); matcher.find(); )
        tokenList.add(matcher.group());
    return tokenList;
}

在Java 9+:

public static List<String> stringTokenizer(String str) {
    return Pattern.compile("[()]|\"[^\"]*\"|\w+(?:\.\w+)?|==").matcher(str)
            .results().map(MatchResult::group).collect(Collectors.toList());
}

测试 (Java 8)

String input = "( Customer.browse == \"Car Loan\" ) AND ( Campaign.period BETWEEN 2400 AND 600 ) AND ( Customer.eligibity == TRUE ) AND ( Campaign.campaign_name == \"Browse To Start\") AND ( Customer.application_started == \"Car Loan\" ) AND ( Time.currenttime BETWEEN 800 AND 2000 ) THEN ( Notification.message == SUPPRESS)";
for (String token : stringTokenizer(input))
    System.out.println(token);

输出

(
Customer.browse
==
"Car Loan"
)
AND
(
Campaign.period
BETWEEN
2400
AND
600
)
AND
(
Customer.eligibity
==
TRUE
)
AND
(
Campaign.campaign_name
==
"Browse To Start"
)
AND
(
Customer.application_started
==
"Car Loan"
)
AND
(
Time.currenttime
BETWEEN
800
AND
2000
)
THEN
(
Notification.message
==
SUPPRESS
)

字符串正则表达式无法拆分右括号中的单词

String regex is not working to split words in closed parenthesis

java

regex

string

split

tokenize