英文:
Java Regex match exact SSN pattern
问题
我想从输入字符串中捕获精确的SSN模式DDD-DD-DDDD，而不是其他模式DDD-DD-DDDD-DDD
String line = " Hello my SSN : 111-22-3333-444 and another SSN: 333-56-3789" ;
Pattern p = Pattern.compile("\\b\\d{3}-\\d{2}-\\d{4}\\b");
Matcher m = p.matcher(line);
while(m.find()) {
System.out.println(m.group() );
}
我的输出结果是：
333-56-3789
期望的输出结果：333-56-3789
我尝试添加了\b边界，但仍然没有成功。
英文:
I want to capture exact SSN pattern DDD-DD-DDDD from the input string not the other pattern DDD-DD-DDDD-DDD
String line = " Hello my SSN : 111-22-3333-444 and another SSN: 333-56-3789" ;
Pattern p = Pattern.compile("\\d{3}-\\d{2}-\\d{4}");
Matcher m = p.matcher(line);
while(m.find()) {
System.out.println(m.group() );
}
I'm getting output as
111-22-3333
333-56-3789
Expected Output: 333-56-3789
I tried adding \b boundaries still no luck
答案1
得分: 1
你可以使用以下正则表达式：
(?<!\d|\d[.-])\d{3}(?=([.-]))\d{2}\d{4}(?![.-]?\d)
查看 正则表达式演示。详细信息：
(?<!\d|\d[.-])- 左侧不允许紧邻数字或数字+-/.。\d{3}- 三位数字。(?=([.-]))- 正向先行断言，捕获下一个字符，必须是.或-。\1- 与前瞻中的捕获组捕获的相同值。\d{2}- 两位数字。\1- 与前瞻中的捕获组捕获的相同值。\d{4}- 四位数字。(?![.-]?\d)- 右侧不允许紧邻-/.+ 数字或仅数字。
查看 Java 演示：
String line = "Hello my 1st SSN : 11.333.56.3788 , 2nd SSN: 333-56-3789 , 3rd SSN 333.56.3780";
Pattern p = Pattern.compile("(?<!\\d|\\d[.-])\\d{3}(?=([.-]))\\\d{2}\\\d{4}(?![.-]?\\d)");
Matcher m = p.matcher(line);
while(m.find()) {
System.out.println(m.group());
}
// => 333-56-3789 and 333.56.3780
英文:
You can use
(?<!\d|\d[.-])\d{3}(?=([.-]))\d{2}\d{4}(?![.-]?\d)
See the regex demo. Details:
(?<!\d|\d[.-])- no digit nor digit +-/.immediately to the left is allowed\d{3}- three digits(?=([.-]))- a positive lookahead that captures the next char that must be.or-\1- same value as captured with the capturing group in the lookahead\d{2}- two diigits\1- same value as captured with the capturing group in the lookahead\d{4}- four digits(?![.-]?\d)- no-/.+ digit or just digit is allowed immediately to the right of the current location.
See the Java demo:
String line = "Hello my 1st SSN : 11.333.56.3788 , 2nd SSN: 333-56-3789 , 3rd SSN 333.56.3780" ;
Pattern p = Pattern.compile("(?<!\\d|\\d[.-])\\d{3}(?=([.-]))\\\d{2}\\\d{4}(?![.-]?\\d)");
Matcher m = p.matcher(line);
while(m.find()) {
System.out.println(m.group() );
}
// => 333-56-3789 and 333.56.3780
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