EncryptUtil.java

package cn.buk.util;

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

/**
 * Created by yfdai on 2015-1-12.
 */
public class EncryptUtil {

    // MD5加密
    public static String MD5Encoding(String source)
            throws NoSuchAlgorithmException {
        MessageDigest mdInst = MessageDigest.getInstance("MD5");
        byte[] input = source.getBytes();
        mdInst.update(input);
        byte[] output = mdInst.digest();

        int i = 0;

        StringBuffer buf = new StringBuffer("");

        for (int offset = 0; offset < output.length; offset++) {
            i = output[offset];

            if (i < 0) {
                i += 256;
            }

            if (i < 16) {
                buf.append("0");
            }

            buf.append(Integer.toHexString(i));
        }
        return buf.toString();
    }
}