Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 *   Copyright (C)  2016 android@19code.com
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

import java.io.IOException;
import java.io.InputStream;

import java.security.DigestInputStream;

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

public class Main {
    public static String md5(String input) {
        try {
            MessageDigest messageDigest = MessageDigest.getInstance("MD5");
            messageDigest.update(input.getBytes());
            byte[] resultByteArray = messageDigest.digest();
            char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
            char[] resultCharArray = new char[resultByteArray.length * 2];
            int index = 0;
            for (byte b : resultByteArray) {
                resultCharArray[index++] = hexDigits[b >>> 4 & 0xf];
                resultCharArray[index++] = hexDigits[b & 0xf];
            }
            return new String(resultCharArray);
        } catch (NoSuchAlgorithmException e) {
            return null;
        }
    }

    public static String md5(InputStream in) {
        int bufferSize = 256 * 1024;
        DigestInputStream digestInputStream = null;
        try {
            MessageDigest messageDigest = MessageDigest.getInstance("MD5");
            digestInputStream = new DigestInputStream(in, messageDigest);
            byte[] buffer = new byte[bufferSize];
            while (digestInputStream.read(buffer) > 0)
                ;
            messageDigest = digestInputStream.getMessageDigest();
            byte[] resultByteArray = messageDigest.digest();
            char[] hexDigits = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
            char[] resultCharArray = new char[resultByteArray.length * 2];
            int index = 0;
            for (byte b : resultByteArray) {
                resultCharArray[index++] = hexDigits[b >>> 4 & 0xf];
                resultCharArray[index++] = hexDigits[b & 0xf];
            }
            return new String(resultCharArray);
        } catch (NoSuchAlgorithmException e) {
            return null;
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (digestInputStream != null)
                    digestInputStream.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return null;
    }
}