checkvalue.java

计算机技术的快速发展

package com.suninformation.tools;

import java.util.Calendar;
import java.sql.Date;
import java.security.*;

/**
 * 数据类型检查
 *
 * <p>Title: SunInformation's toolkit system</p>
 *
 * <p>Description: 系统常用工具包</p>
 *
 * <p>Copyright: Copyright (c) 2005-03-17</p>
 *
 * <p>Company: 梦想软件开发工作室</p>
 *
 * @author 刘镇
 * @version 1.0
 */
public class CheckValue {
  /**
   * 是否为数值型
   *
   * @param numString String
   * @return boolean
   */
  public static boolean isNumber(String numString) {
    boolean is = false;
    try {
      Integer.parseInt(numString);
      is = true;
    }
    catch (NumberFormatException e) {
    }
    return is;
  }

  public static Date isSQLDate(int year, int month, int day) {
    Date sqlDate = null;
    if ( (year < 1930 || year > 2005) || (month < 1 || month > 12) ||
        (day < 1 || day > 31)) {
    }
    else if (year != -1 && month != -1 && day != -1) {
      try {
        Calendar mDate = Calendar.getInstance();
        mDate.set(year, month - 1, day);
        sqlDate = new Date(mDate.getTimeInMillis());
      }
      catch (Exception e) {
        return null;
      }
    }
    return sqlDate;
  }

  //HTML特殊字符转换
  public static String HtmlSpecialChars(String str) {
    if (str == null || str.equals("")) {
      return str;
    }
    StringBuffer temp = new StringBuffer();
    int i = 0;
    while (i < str.length()) {
      //将\n转换成<br>
      if (str.charAt(i) == '\n') {
        temp = temp.append("<br>");
      }
      //将空格转换成&nbsp;
      else if (str.charAt(i) == ' ') {
        temp = temp.append("&nbsp;");
      }
      //将<转换成&lt;
      else if (str.charAt(i) == '<') {
        temp = temp.append("&lt;");
      }
      //将>转换成&gt;
      else if (str.charAt(i) == '>') {
        temp = temp.append("&gt;");
      }
      else {
        temp = temp.append(str.substring(i, i + 1));
      }
      i++;
    }
    String okstring = temp.toString();
    return okstring;
  }

  //MD5加密
  public static String md5(String x) {
    try {
      MessageDigest m = MessageDigest.getInstance("MD5");
      m.update(x.getBytes("UTF8"));
      byte s[] = m.digest();
      String result = "";
      for (int i = 0; i < s.length; i++) {
        result += Integer.toHexString( (0x000000FF & s[i]) | 0xFFFFFF00).
            substring(6);
      }
      return result;
    }
    catch (Exception e) {
      return null;
    }
  }

  public static String showClassMessage(String str) {
    String temp = HtmlSpecialChars(str);
    temp = temp.replaceAll("//1//","<img src='Images/Pic/1.gif'>");
    temp = temp.replaceAll("//2//","<img src='Images/Pic/2.gif'>");
    temp = temp.replaceAll("//3//","<img src='Images/Pic/3.gif'>");
    temp = temp.replaceAll("//4//","<img src='Images/Pic/4.gif'>");
    temp = temp.replaceAll("//5//","<img src='Images/Pic/5.gif'>");
    temp = temp.replaceAll("//6//","<img src='Images/Pic/6.gif'>");
    temp = temp.replaceAll("//7//","<img src='Images/Pic/7.gif'>");
    temp = temp.replaceAll("//8//","<img src='Images/Pic/8.gif'>");
    temp = temp.replaceAll("//9//","<img src='Images/Pic/9.gif'>");
    temp = temp.replaceAll("//10//","<img src='Images/Pic/10.gif'>");
    temp = temp.replaceAll("//11//","<img src='Images/Pic/11.gif'>");
    temp = temp.replaceAll("//12//","<img src='Images/Pic/12.gif'>");
    temp = temp.replaceAll("//13//","<img src='Images/Pic/13.gif'>");
    temp = temp.replaceAll("//14//","<img src='Images/Pic/14.gif'>");
    temp = temp.replaceAll("//15//","<img src='Images/Pic/15.gif'>");
    temp = temp.replaceAll("//16//","<img src='Images/Pic/16.gif'>");
    temp = temp.replaceAll("//17//","<img src='Images/Pic/17.gif'>");
    temp = temp.replaceAll("//18//","<img src='Images/Pic/18.gif'>");
    temp = temp.replaceAll("//19//","<img src='Images/Pic/19.gif'>");
    temp = temp.replaceAll("//20//","<img src='Images/Pic/20.gif'>");
    temp = temp.replaceAll("//21//","<img src='Images/Pic/21.gif'>");
    temp = temp.replaceAll("//22//","<img src='Images/Pic/22.gif'>");
    temp = temp.replaceAll("//23//","<img src='Images/Pic/23.gif'>");
    temp = temp.replaceAll("//24//","<img src='Images/Pic/24.gif'>");
    temp = temp.replaceAll("//25//","<img src='Images/Pic/25.gif'>");
    temp = temp.replaceAll("//26//","<img src='Images/Pic/26.gif'>");
    temp = temp.replaceAll("//27//","<img src='Images/Pic/27.gif'>");
    temp = temp.replaceAll("//28//","<img src='Images/Pic/28.gif'>");
    temp = temp.replaceAll("//29//","<img src='Images/Pic/29.gif'>");
    temp = temp.replaceAll("//30//","<img src='Images/Pic/30.gif'>");
    temp = temp.replaceAll("//31//","<img src='Images/Pic/31.gif'>");
    temp = temp.replaceAll("//32//","<img src='Images/Pic/32.gif'>");
    temp = temp.replaceAll("//33//","<img src='Images/Pic/33.gif'>");
    temp = temp.replaceAll("//34//","<img src='Images/Pic/34.gif'>");
    temp = temp.replaceAll("//35//","<img src='Images/Pic/35.gif'>");
    temp = temp.replaceAll("//36//","<img src='Images/Pic/36.gif'>");
    temp = temp.replaceAll("//37//","<img src='Images/Pic/37.gif'>");
    temp = temp.replaceAll("//38//","<img src='Images/Pic/38.gif'>");
    temp = temp.replaceAll("//39//","<img src='Images/Pic/39.gif'>");
    temp = temp.replaceAll("//40//","<img src='Images/Pic/40.gif'>");
    temp = temp.replaceAll("//41//","<img src='Images/Pic/41.gif'>");
    temp = temp.replaceAll("//42//","<img src='Images/Pic/42.gif'>");
    temp = temp.replaceAll("//43//","<img src='Images/Pic/43.gif'>");
    temp = temp.replaceAll("//44//","<img src='Images/Pic/44.gif'>");
    temp = temp.replaceAll("//45//","<img src='Images/Pic/45.gif'>");
    temp = temp.replaceAll("//46//","<img src='Images/Pic/46.gif'>");
    temp = temp.replaceAll("//47//","<img src='Images/Pic/47.gif'>");
    temp = temp.replaceAll("//48//","<img src='Images/Pic/48.gif'>");
    temp = temp.replaceAll("//49//","<img src='Images/Pic/49.gif'>");
    temp = temp.replaceAll("//50//","<img src='Images/Pic/50.gif'>");
    temp = temp.replaceAll("//51//","<img src='Images/Pic/51.gif'>");
    temp = temp.replaceAll("//52//","<img src='Images/Pic/52.gif'>");
    temp = temp.replaceAll("//53//","<img src='Images/Pic/53.gif'>");
    temp = temp.replaceAll("//54//","<img src='Images/Pic/54.gif'>");
    temp = temp.replaceAll("//55//","<img src='Images/Pic/55.gif'>");
    temp = temp.replaceAll("//56//","<img src='Images/Pic/56.gif'>");
    temp = temp.replaceAll("//57//","<img src='Images/Pic/57.gif'>");
    temp = temp.replaceAll("//58//","<img src='Images/Pic/58.gif'>");
    temp = temp.replaceAll("//59//","<img src='Images/Pic/59.gif'>");
    temp = temp.replaceAll("//60//","<img src='Images/Pic/60.gif'>");
    temp = temp.replaceAll("//61//","<img src='Images/Pic/61.gif'>");
    temp = temp.replaceAll("//62//","<img src='Images/Pic/62.gif'>");
    temp = temp.replaceAll("//63//","<img src='Images/Pic/63.gif'>");
    temp = temp.replaceAll("//64//","<img src='Images/Pic/64.gif'>");
    return temp;
  }
}