java 常用工具类

package org.fh.util;
import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
 * 说明：常用工具
 * 作者：FH Admin
 * from：fhadmin.cn
 */
public class Tools {
  /**
   * 随机生成六位数验证码 
   * @return
   */
  public static int getRandomNum(){
     Random r = new Random();
     return r.nextInt(900000)+100000;//(Math.random()*(999999-100000)+100000)
  }
  /**
   * 随机生成四位数验证码 
   * @return
   */
  public static int getRandomNum4(){
     Random r = new Random();
     return r.nextInt(9000)+1000;
  }
  /**
   * 检测字符串是否不为空(null,"","null")
   * @param s
   * @return 不为空则返回true，否则返回false
   */
  public static boolean notEmpty(String s){
    return s!=null && !"".equals(s) && !"null".equals(s);
  }
  /**
   * 检测字符串是否为空(null,"","null")
   * @param s
   * @return 为空则返回true，不否则返回false
   */
  public static boolean isEmpty(String s){
    return s==null || "".equals(s) || "null".equals(s);
  }
  /**
   * 字符串转换为字符串数组
   * @param str 字符串
   * @param splitRegex 分隔符
   * @return
   */
  public static String[] str2StrArray(String str,String splitRegex){
    if(isEmpty(str)){
      return null;
    }
    return str.split(splitRegex);
  }
  /**
   * 用默认的分隔符(,)将字符串转换为字符串数组
   * @param str 字符串
   * @return
   */
  public static String[] str2StrArray(String str){
    return str2StrArray(str,",\\s*");
  }
  /**
    * 验证邮箱
    * @param email
    * @return
    */
   public static boolean checkEmail(String email){
    boolean flag = false;
    try{
      String check = "^([a-z0-9A-Z]+[-|_|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
      Pattern regex = Pattern.compile(check);
      Matcher matcher = regex.matcher(email);
      flag = matcher.matches();
     }catch(Exception e){
      flag = false;
     }
    return flag;
   }
   /**
    * 验证手机号码
    * @param mobiles
    * @return
    */
   public static boolean checkMobileNumber(String mobileNumber){
    boolean flag = false;
    try{
      Pattern regex = Pattern.compile("^(((13[0-9])|(15([0-3]|[5-9]))|(18[0,5-9]))\\d{8})|(0\\d{2}-\\d{8})|(0\\d{3}-\\d{7})$");
      Matcher matcher = regex.matcher(mobileNumber);
      flag = matcher.matches();
     }catch(Exception e){
      flag = false;
     }
    return flag;
   }
  /**
   * 检测KEY是否正确
   * @param paraname  传入参数
   * @param FKEY    接收的 KEY
   * @return 为空则返回true，不否则返回false
   */
  public static boolean checkKey(String paraname, String FKEY){
    paraname = (null == paraname)? "":paraname;
    return MD5.md5(paraname+DateUtil.getDays()+",fh,").equals(FKEY);
  }
  public static void main(String[] args) {
    System.out.println(getRandomNum());
  }
}