Question

我有一个类似“portal100common2055”的字符串。

我想把它分成两部分，第二部分应该只包含数字。

“portal200511sbet104”将变为《portal200511sbet》，



你能帮我实现这一点吗？

Answer 1

像这样：

    Matcher m = Pattern.compile("^(.*?)(\d+)$").matcher(args[0]);
    if( m.find() ) {
        String prefix = m.group(1);
        String digits = m.group(2);
        System.out.println("Prefix is ""+prefix+""");
        System.out.println("Trailing digits are ""+digits+""");
    } else {
        System.out.println("Does not match");
    }

Answer 2

String[] parts = input.split("(?<=\D)(?=\d+$)");
if (parts.length < 2) throw new IllegalArgumentException("Input does not end with numbers: " + input);
String head = parts[0];
String numericTail = parts[1];

这个更优雅的解决方案使用regex的向后看和向前看

说明：

(?<=\D) means at the current point, ensure the preceding characters ends with a non-digit (a non-digit is expressed as D)

(?=\d+$) means t the current point, ensure that only digits are found to the end of the input (a digit is expressed as d)

这将只在您想要划分输入的所需点处为true

友情链接