将字节数据转换为十六进制

/*

 * Copyright (c) 2008-2016 Haulmont.

 *

 * 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.

 *

 */
 /* 
 *来 自
  n o w  j a v a  . c o m
 */

//package com.nowjava;

import java.util.Locale;


public class Main {

    public static void main(String[] argv) throws Exception {

        byte[] data = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };

        System.out.println(toHex(data));

    }


    /**

     * Converts byte data to a Hex-encoded string.

     *

     * @param data

     *            data to hex encode.

     *

     * @return hex-encoded string.

     */

    public static String toHex(byte[] data) {

        StringBuilder sb = new StringBuilder(data.length * 2);

        for (byte aData : data) {/*n o w j a   v  a . c o m - 时  代  Java 提供*/

            String hex = Integer.toHexString(aData);

            if (hex.length() == 1) {

                // Append leading zero.

                sb.append("0");