MD5 Tool 工具类

package com.example.secret.tools;





import java.io.UnsupportedEncodingException;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;









public class MD5Tool {



public static String md5(String string)

{

byte[] hash;



try {

hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));

} catch (NoSuchAlgorithmException e) {

// TODO Auto-generated catch block

throw new RuntimeException("huh,MD5 should be supported?",e);

} catch (UnsupportedEncodingException e) {

// TODO Auto-generated catch block

throw new RuntimeException("huh,UTF-8 should be supported?",e);

}



StringBuilder hex = new StringBuilder(hash.length * 2);

for(byte b: hash){

if((b&0xFF) < 0x10)hex.append("0");

hex.append(Integer.toHexString(b & 0xFF));

}

return hex.toString();



}





}