java - 如何使这个正则表达式为负？

Question

我想得到这个模式的负片

Pattern pt = Pattern.compile("FOR,FGS-(AX|AX2|AXMM|EMP|LV1|MLE)," + "(.*?)" + "FOR,");

我尝试了这个，但没有成功

Pattern pt = Pattern.compile("[^FOR,FGS-(AX|AX2|AXMM|EMP|LV1|MLE)," + "(.*?)" + "FOR,]");

我遇到了这个错误:

Exception in thread "main" java.util.regex.PatternSyntaxException: Illegal character range near index 10 [^FOR,FGS-(AX|AX2|AXMM|EMP|LV1|MLE),(.*?)FOR,] ^ at java.util.regex.Pattern.error(Unknown Source) at java.util.regex.Pattern.range(Unknown Source) at java.util.regex.Pattern.clazz(Unknown Source) at java.util.regex.Pattern.sequence(Unknown Source) at java.util.regex.Pattern.expr(Unknown Source) at java.util.regex.Pattern.compile(Unknown Source) at java.util.regex.Pattern.(Unknown Source) at java.util.regex.Pattern.compile(Unknown Source)

Answer 1

我猜您可能希望设计一个表达式来排除列出的字符串，也许是一个类似于以下内容的表达式:

^(?!.*(FOR,FGS-(AX|AX2|AXMM|EMP|LV1|MLE))).*$

该表达式在 regex101.com 的右上角面板中进行了解释，如果您想探索/简化/修改它，请在this link中，如果您愿意，您可以观察它如何与一些示例输入匹配。

测试

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

final String regex = "^(?!.*(FOR,FGS-(AX|AX2|AXMM|EMP|LV1|MLE))).*$";
final String string = "Anything before, FOR,FGS-AX, some other things FOR, anything you wish after\n"
     + "Anything before, FOR,FGS-AX2, some other things FOR, anything you wish after \n"
     + "Anything before, FOR,FGS-EMP, some other things FOR,  anything you wish after\n"
     + "Anything before, FOR,FGS-AX2, some other things FOR, anything you wish after \n"
     + "Anything before, FOR,FGS-AX2, some other things FOR, anything you wish after \n"
     + "Anything before, FOR,FGS-AXMM, some other things FOR, anything you wish after \n"
     + "Anything before, FOR,FGS-NOTAXMM, some other things FOR, anything you wish after ";

final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
final Matcher matcher = pattern.matcher(string);

while (matcher.find()) {
    System.out.println("Full match: " + matcher.group(0));
    for (int i = 1; i <= matcher.groupCount(); i++) {
        System.out.println("Group " + i + ": " + matcher.group(i));
    }
}

正则表达式电路

jex.im可视化正则表达式:

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编辑

使用正则表达式执行此任务相当复杂，如果可能的话，也许您会尝试将其拆分为一个数组，然后使用简单的表达式进行检查，排除不需要的表达式，最后加入其他表达式。

如果可能的话，字符串替换也可能是另一种选择。

<小时/>

这些表达式也可以查看:

DEMO 1

DEMO 2