摘要：
using System;
using System.Drawing;
using System.Data;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text.RegularExpressions;
using System.IO;
using System.Drawing.Imaging;
using System.Text;
using System.Web.Security;
namespace 4ec
{
///
/// 对一些字符串进行操作的类
///
public class StringUtil
{
private static string passWord; //加密字符串
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