java - 使用多个字符串分隔符分割字符串

Question

如何将过滤器列表拆分为单个过滤器元素？split2String 结果为:线程“main”中的异常 java.util.regex.PatternSyntaxException:索引 10 附近的未封闭组或(|和(

public class TestIt {

    public static void main(String[] args) {
        // condition is Part of the Thunderbird Filter List
        String condition1 = "OR (subject,contains,Xxxx Yyyy) OR (subject,contains,Uuuu Cccc) AND (from,contains,Wwwww Zzzzz) OR (subject,contains,Uuuu Cccc)";
        String condition2 = "OR (subject,contains,Xxxx YyOR yy) OR (subject,contains,Uuuu CcAND cc) AND (from,contains,Wwwww Zzzzz) OR (subject,contains,Uuuu Cccc)";
        split1String(condition1);
        split1String(condition2);
        split2String(condition1);
        split2String(condition2);
        /*
         * Expected Result with condition2:
         * (subject,contains,Xxxx YyOR yy)
         * (subject,contains,Uuuu CcAND cc)
         * (from,contains,Wwwww Zzzzz)
         * (subject,contains,Uuuu Cccc)
         * 
         */
    }

    public static void split1String(String condition) {
        // Syntax=OK Result wrong
        String[] xsplitted = condition.split("OR |AND ");
        for (int i = 0; i < xsplitted.length; i++) {
            System.out.println(xsplitted[i]);
        }
    }

    public static void split2String(String condition) {
        // Syntax=NOT OK 
        String[] xsplitted = condition.split("OR (|AND (");
        for (int i = 0; i < xsplitted.length; i++) {
            System.out.println(xsplitted[i]);
        }
    }

Answer 1

"OR (|AND (" 此正则表达式的语法不正确。圆括号字符 ( 在正则表达式中具有特殊含义。它标记 capturing group 的乞求由于是特殊字符，所以加上\\就一定是escaped:

"OR (subject,contains,Xxxx Yyyy) OR (subject,contains,Uuuu Cccc) AND (from,contains,Wwwww Zzzzz) OR (subject,contains,Uuuu Cccc)".split("OR \\(|AND \\(")

这给出:

 String[5] { "", "subject,contains,Xxxx Yyyy) ", "subject,contains,Uuuu Cccc) ", "from,contains,Wwwww Zzzzz) ", "subject,contains,Uuuu Cccc)" }

所以正确的正则表达式如下所示:"OR\\(|AND\\("