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());
    }

}