Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.nio.charset.Charset;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    private static final char[] DIGITS_UPPER = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C',
            'D', 'E', 'F' };

    /**
     * Encrypt the plain text with MD5 algorithm.
     *
     * @param plainText The plain text.
     * @return The Encrypt content.
     */
    public static String md5Encrypt(String plainText) {
        try {
            MessageDigest digest = MessageDigest.getInstance("MD5");
            digest.update(plainText.getBytes(Charset.defaultCharset()));
            return new String(toHex(digest.digest()));
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return "";
    }

    private static char[] toHex(byte[] data) {
        char[] toDigits = DIGITS_UPPER;
        int l = data.length;
        char[] out = new char[l << 1];
        // two characters form the hex value.
        for (int i = 0, j = 0; i < l; i++) {
            out[j++] = toDigits[(0xF0 & data[i]) >>> 4];
            out[j++] = toDigits[0x0F & data[i]];
        }
        return out;
    }
}