package com;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.security.MessageDigest;
public class MD5Util {
/**
* @param args
*
*
*/
static Logger logger = LoggerFactory.getLogger(MD5Util.class);
private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5",
"6", "7", "8", "9", "A", "B", "C", "D", "E", "F" };
/**
* 转换字节数组为16进制字串
*
* @param b
* 字节数组
* @return 16进制字串
*/
public static String byteArrayToHexString(byte[] b) {
StringBuffer resultSb = new StringBuffer();
for (int i = 0; i < b.length; i++) {
resultSb.append(byteToHexString(b[i]));
}
return resultSb.toString();
}
/**
* J 转换byte到16进制
*
* @param b
* @return
*/
private static String byteToHexString(byte b) {
int n = b;
if (n < 0) {
n = 256 + n;
}
int d1 = n / 16;
int d2 = n % 16;
return hexDigits[d1] + hexDigits[d2];
}
// MessageDigest 为 JDK 提供的加密类
public static String MD5Encode(String origin) {
if (origin == null)
return null;
String resultString = null;
try {
resultString = new String(origin);
MessageDigest md = MessageDigest.getInstance("MD5");
resultString = byteArrayToHexString(md.digest(resultString
.getBytes()));
} catch (Exception ex) {
logger.error(MD5EncodeUtil.class + " --MD5加密异常:" + ex);
}
return resultString;
}
public static void main(String[] args) {
System.out.println(MD5Encode("1"));
// String a = null;
// System.out.println( new String(a) );
}
}
Java版MD5加密工具类
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转载自blog.csdn.net/qq_28397259/article/details/81449250
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