com.sharksharding.util.MD5Util Maven / Gradle / Ivy
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/*
* Copyright 2015-2101 gaoxianglong
*
* 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.sharksharding.util;
import java.security.MessageDigest;
import com.sharksharding.exception.UtilsRuntimeException;
/**
* 生成32位的小写MD5码，主要用于校验redis cluster配置中心的配置信息比对
*
* @author gaoxianglong
*
* @version 1.3.7
*/
public class MD5Util {
/**
* 生成32位的MD5码
*
* @author gaoxianglong
*
* @param str
* 加密前的文本信息
*
* @exception UtilsRuntimeException
*
* @return String 生成的32位MD5码
*/
public static String toMd5Code(String str) {
String result = null;
if (null != str) {
try {
MessageDigest messageDigest = MessageDigest.getInstance("MD5");
messageDigest.update(str.getBytes());
byte[] values = messageDigest.digest();
StringBuffer strBuffer = new StringBuffer();
for (byte value : values) {
int bt = value & 0xff;
if (bt < 16)
strBuffer.append(0);
strBuffer.append(Integer.toHexString(bt));
}
result = strBuffer.toString();
} catch (Exception e) {
throw new UtilsRuntimeException("生成32位的MD5码失败[" + e.toString() + "]");
}
}
return result;
}
}