Java实现SHA1加密

雨点打透心脏的1/2处 2022-07-14 15:11 220阅读 0赞

微信接入中需要用到SHA1的算法。Java版的SHA1加密如下：

/*
     * 微信公众平台(JAVA) SDK
     *
     * Copyright (c) 2016, Ansitech Network Technology Co.,Ltd All rights reserved.
     * http://www.ansitech.com/weixin/sdk/
     *
     * 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.
     */
    package com.levi.utils;
    
    import java.security.MessageDigest;
    
    /**
     * <p>Title: SHA1算法</p>
     *
     * @author levi
     */
    public final class SHA1 {
    
        private static final char[] HEX_DIGITS = {'0', '1', '2', '3', '4', '5',
                               '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
    
        /**
         * Takes the raw bytes from the digest and formats them correct.
         *
         * @param bytes the raw bytes from the digest.
         * @return the formatted bytes.
         */
        private static String getFormattedText(byte[] bytes) {
            int len = bytes.length;
            StringBuilder buf = new StringBuilder(len * 2);
            // 把密文转换成十六进制的字符串形式
            for (int j = 0; j < len; j++) {
                buf.append(HEX_DIGITS[(bytes[j] >> 4) & 0x0f]);
                buf.append(HEX_DIGITS[bytes[j] & 0x0f]);
            }
            return buf.toString();
        }
    
        public static String encode(String str) {
            if (str == null) {
                return null;
            }
            try {
                MessageDigest messageDigest = MessageDigest.getInstance("SHA1");
                messageDigest.update(str.getBytes());
                return getFormattedText(messageDigest.digest());
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    }

如果需要做微信接入，直接把上面的复制新建一个类即可使用，我自己做好的，测试微信接入成功。