<<< Java生成Md5

package cn.sevennight.test;

import java.security.MessageDigest;

public class md5{

  	public static String MD5(String text) {
		try {
			MessageDigest md = MessageDigest.getInstance("MD5");
			md.update(text.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 new String(buf.toString());
		} catch (Exception e) {
			e.printStackTrace();
			return "";
		}
	}
        public static void main(String[] args) {
		String md5 =MD5("123456");
		System.out.println(md5);
	}
}