微信接入中需要用到sha1的算法。java版的sha1加密如下：
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/*
* 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);
}
}
}
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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。
原文链接：https://blog.csdn.net/qq_25821067/article/details/53643365