md5encode.java

Java 16位MD5 Hash code generator

package com.geminimobile.vacif.socket.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5Encode
{
	public static String Md5(String plainText ) {
		try {
			MessageDigest md = MessageDigest.getInstance("MD5");
			md.update(plainText.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));
			}

			//System.out.println("result: " + buf.toString());//32位的加密

			return buf.toString().substring(8,24);//16位的加密
		} catch (NoSuchAlgorithmException e) {
		}
		return null;
	}	
		
		
	public static void main(String[] args){
		try {
			System.out.println(Md5("password"));
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}