Java 正则表达式生成模式

Question

我尝试生成我的 Pattern，以便能够通过 UI 中的 JTextfield 设置/添加/编辑它对于 variant2，它工作正常，但如果我尝试添加不止一个模式 (variant1)，它就会停止工作。

你能告诉我我做错了什么吗？

这里是代码的相关部分:

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

public class TestSomeStaff {

String getPattern(String s) {
    String p = "";
    for (int i = 0; i < s.length(); i++) {
        if (Character.isLetter(s.charAt(i))) {
            p += "\\" + "w";
        } else if (Character.isDigit(s.charAt(i))) {
            p += "\\" + "d";
        } else {
            p += s.charAt(i);
        }
    }
    return p;
}

public static void main(String[] args) {
    String code1 = "11XXX08_XX000XX__XX11";
    String code2 = "11XXX08_XX000X__XX11";
    TestSomeStaff t = new TestSomeStaff();

    // String p="("+t.getPattern(code1) + ") | ("+t.getPattern(code2)+")";
    // //variant1
    String p = t.getPattern(code1); // variant 2
    System.out.println(t.getPattern(code1));
    Pattern pat = Pattern.compile(p);

    Matcher m = pat.matcher(code1);
    System.out.println("pattern:" + m.pattern());

    if (m.find()) {
        System.out.println(m.group());
    }
}
}

var1 输出:

\d\d\w\w\w\d\d_\w\w\d\d\d\w\w__\w\w\d\d
pattern:(\d\d\w\w\w\d\d_\w\w\d\d\d\w\w__\w\w\d\d) | (\d\d\w\w\w\d\d_\w\w\d\d\d\w__\w\w\d\d)

var2 输出:

\d\d\w\w\w\d\d_\w\w\d\d\d\w\w__\w\w\d\d
pattern:\d\d\w\w\w\d\d_\w\w\d\d\d\w\w__\w\w\d\d
11XXX08_XX000XX__XX11

Answer 1

variant1 模式中的空格很重要。如果您删除空格，则该变体将起作用。