Java中MD5加密类的书写

Java中MD5加密类的书写

MyTools.java

package com.zp.util;import java.security.MessageDigest;public class MyTools{ public final static String MD5(String s){char hexDigits[]={'0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f'};try{byte[] strTemp=s.getBytes();MessageDigest mdTemp=MessageDigest.getInstance("MD5");mdTemp.update(strTemp);byte[] md=mdTemp.digest();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){return null;}}}

TestMain.java

package com.zp.test;import com.zp.util.MyTools;public class TestMain{public static void main(String[] args){// TODO Auto-generated method stub//123456System.out.println(MyTools.MD5("123456"));}}