C#版
/// <summary>
/// 摘要:
/// 验证是否是数字【包括正数,负数,附:12,12.345,-0.16,+1234.567】
/// </summary>
/// <param name="str">要验证的字符串</param>
/// <returns>正确返回true,错误返回false</returns>
public static bool IsNumeric(string str)
{
return System.Text.RegularExpressions.Regex.IsMatch(str, @"^([+-]?)\d*[.]?\d*$");
}
/// <summary>
/// 摘要:
/// 验证整数
/// </summary>
/// <param name="str">要验证的字符串</param>
/// <returns>正确返回true,错误返回false</returns>
public static bool IsInt(string str)
{
return System.Text.RegularExpressions.Regex.IsMatch(str, @"^-?\d+$");
}
js trim 正则表达式
var test = " sd das ";
String.prototype.trim = function(){ //去出头尾空格
var re = /^\s+(.*?)\s+$/;
return this.replace(re,"$1");
}
alert("["+test.trim()+"]");
//头尾空格
String.prototype.Trim = function() {
var m = this.match(/^\s*(\S+(\s+\S+)*)\s*$/);
return (m == null) ? "" : m[1];
}
//手机
String.prototype.isMobile = function() {
return (/^(?:13\d|15[89])-?\d{5}(\d{3}|\*{3})$/.test(this.Trim()));
}
//电话
String.prototype.isTel = function()
{
//"兼容格式: 国家代码(2到3位)-区号(2到3位)-电话号码(7到8位)-分机号(3位)"
//return (/^(([0\+]\d{2,3}-)?(0\d{2,3})-)?(\d{7,8})(-(\d{3,}))?$/.test(this.Trim()));
return (/^(([0\+]\d{2,3}-)?(0\d{2,3})-)(\d{7,8})(-(\d{3,}))?$/.test(this.Trim()));
}