Pattern例子

package com.test;import java.util.Scanner;import java.util.regex.Matcher;import java.util.regex.Pattern;public class RegexTest {public static void main(String[] args) {Scanner in = new Scanner(System.in);System.out.println("Enter pattern:");String patternStr = in.nextLine();Pattern pattern = null;try {pattern = Pattern.compile(patternStr);} catch (Exception e) {System.err.println("pattern syntax error");System.exit(1);}while(true){System.out.println("Enter String to math:");String input = in.nextLine();if(null == input || input.equals("")) return;Matcher matcher = pattern.matcher(input);if(matcher.matches()){System.out.println("Match");int g = matcher.groupCount();if(g > 0 ){for (int i = 0; i < input.length(); i++) {for (int j = 1; j <= g; j++) {if(i == matcher.start()){System.out.println("(");}System.out.println(input.charAt(i));}for (int j = 1; j <= g; j++) {if(i == matcher.end()){System.out.println(")");}System.out.println(input.charAt(i));}}}} else {System.out.println("no match");}}}}

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1 楼 grape927 2012-02-06 正则表达式关于替换

Pattern p = Pattern.compile("[0-9]+");
Matcher m = p.matcher("abcd123456");
String output = m.replaceAll("*");
System.out.println(output);

输出 abcd*