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package com.sangedabuliu.www; import java.util.regex.Matcher; import java.util.regex.Pattern; public class UserReg { /** * 验证用户名,支持中英文(包括全角字符)、数字、下划线和减号 (全角及汉字算两位),长度为4-20位,中文按二位计数 * @author www.sangedabuliu.com * @param userName * @return */ public static boolean validateUserName(String userName) { String validateStr = "^[\\w\\--_[0-9]\u4e00-\u9fa5\uFF21-\uFF3A\uFF41-\uFF5A]+$"; boolean rs = false; rs = matcher(validateStr, userName); if (rs) { int strLenth = getStrLength(userName); if (strLenth < 4 || strLenth > 20) { rs = false; } } return rs; } /** * 获取字符串的长度,对双字符(包括汉字)按两位计数 * * @param value * @return */ public static int getStrLength(String value) { int valueLength = 0; String chinese = "[\u0391-\uFFE5]"; for (int i = 0; i < value.length(); i++) { String temp = value.substring(i, i + 1); if (temp.matches(chinese)) { valueLength += 2; } else { valueLength += 1; } } return valueLength; } private static boolean matcher(String reg, String string) { boolean tem = false; Pattern pattern = Pattern.compile(reg); Matcher matcher = pattern.matcher(string); tem = matcher.matches(); return tem; } public static void main(String[] args) { String str = "0-_f9zd中22"; String st = "A-dq_!!!!去符号标号!ノチセたのひちぬ!当然。!!..**半角"; System.out.println(validateUserName(str)); System.out.println(st.replaceAll("[\\pP&&[^-_]]", "")); System.out.println(st.replaceAll("[\\w\\-一-龥A-Za-z]", "")); } }
java代码验证用户名,支持中英文(包括全角字符)、数字、下划线和减号 (全角及汉字算两位),长度为4-20位,中文按二位计数
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原文地址:http://blog.csdn.net/chaoyong918/article/details/45058257