java - Java 中以 *** 分隔符分割字符串

Question

public class TestStringSplit {
    public static void main(String[] args) {

        String bal = "IND|TEST|***|Cricket|***";
        String[] patterns = org.springframework.util.StringUtils.split(bal,
                "***");
        System.out.println("SPRING Framework String Split");
        for (String pt : patterns) {
            System.out.println("Pattern " + pt);
        }

        System.out.println("************************");

        patterns = org.apache.commons.lang.StringUtils.split(bal,
                "***");
        System.out.println("Apache Commons Lang String Split");
        for (String pt : patterns) {
            System.out.println("Pattern " + pt);
        }

        System.out.println("************************");

        patterns = bal.split("***");
        System.out.println("JDK String Split");
        for (String pt : patterns) {
            System.out.println("Pattern " + pt);
        }

    }
}

以上结果为

SPRING框架字符串分割

Pattern IND|TEST|

Pattern |Cricket|***

<小时/>

Apache Commons Lang 字符串拆分

Pattern IND|TEST|

Pattern |Cricket|

<小时/>

Exception in thread "main" java.util.regex.PatternSyntaxException: Dangling meta character '*' near index 0
***
^

为什么默认的 JDK 没有给我所需的结果，而是给我异常......以及获取值的模式应该是什么

问候

Answer 1

您需要转义“*”，因为它是正则表达式中的特殊字符:

patterns = bal.split("\\*\\*\\*");