MD5Utils.java

package com.todayinfo.utils;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


public class MD5Utils {
	
	public static String md5(String str){
		
		MessageDigest md;
		try {
			md = MessageDigest.getInstance("MD5");
			md.update(str.getBytes());
			byte b[] = md.digest();
			int i;
			StringBuffer buf = new StringBuffer("");
			
			
			for (int offset = 0; offset < b.length; offset++) {
				i = b[offset];
				if (i < 0)
					i += 256;
				if (i < 16)
					buf.append("0");
				buf.append(Integer.toHexString(i));
				
			}
			
			return buf.toString();
			
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
		
		return str;
	}

}