package vote.utils;

import java.security.MessageDigest;

import java.text.SimpleDateFormat;

import java.util.Date;

//数字字符转数值格式

public class ConvertUtil {

	public int strToInt(String str) {

		int i = 0;

		try {

			if (str != null)

				i = Integer.parseInt(str);

		} catch (Exception e) {

			e.printStackTrace();

		}

		return i;

	}

//时间格式转变(mysql里面时间格式有要求)

	public String getTime() {

		Date date = new Date();

		String pattern = "yyyy/MM/dd HH:mm:ss";

		SimpleDateFormat simple = new SimpleDateFormat(pattern);

		return simple.format(date);

	}

//md5算法

	public final String MD5(String s) {

		            char hexDigits[] = { '0', '1', '2', '3', '4',

		                                '5', '6', '7', '8', '9',

		                               'A', 'B', 'C', 'D', 'E', 'F' };

		           try { 

		                byte[] btInput = s.getBytes();

		        //获得MD5摘要算法的 MessageDigest 对象

		              MessageDigest mdInst = MessageDigest.getInstance("MD5");

		     //使用指定的字节更新摘要

		              mdInst.update(btInput);

		      //获得密文

		             byte[] md = mdInst.digest();

		      //把密文转换成十六进制的字符串形式

		           int j = md.length;

		            char str[] = new char[j * 2];

		             int k = 0;

		            for (int i = 0; i < j; i++) {

		                byte byte0 = md[i];

	                  str[k++] = hexDigits[byte0 >>> 4 & 0xf];

		                 str[k++] = hexDigits[byte0 & 0xf];

		            }

		            return new String(str);

		        }

		       catch (Exception e) {

		             // e.printStackTrace();

		    	   System.out.println("密码可能为空");

		            return null;

	          }

		    } 

}