SecretUtils.java
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package com.subsidy.util;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang3.StringUtils;
import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.util.Arrays;
import java.util.Random;
import java.util.UUID;
public class SecretUtils {
/**
* 对用户登录密码进行MD5加密
*
* @param str
* @return
*/
public static String getMD5String(String str) {
try {
// 生成一个MD5加密计算摘要
return DigestUtils.md5Hex(str.toString()).toUpperCase();
// MessageDigest md = MessageDigest.getInstance("MD5");
// 计算md5函数
// md.update(str.getBytes("utf-8"));
// digest()最后确定返回md5 hash值，返回值为8位字符串。因为md5 hash值是16位的hex值，实际上就是8位的字符
// BigInteger函数则将8位的字符串转换成16位hex值，用字符串来表示；得到字符串形式的hash值
//一个byte是八位二进制，也就是2位十六进制字符（2的8次方等于16的2次方）
// byte[] digest = md.digest(str.getBytes("utf-8"));
// return new BigInteger(1, digest).toString(16);
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* 对字符串进行SHA加密
*
* @param
*/
public static String getSHAString(String str) {
try {
MessageDigest sha = MessageDigest.getInstance("SHA-1");
byte[] byteArray = str.getBytes(StandardCharsets.UTF_8);
byte[] md5Bytes = sha.digest(byteArray);
StringBuffer hexValue = new StringBuffer();
for (int i = 0; i < md5Bytes.length; i++) {
int val = ((int) md5Bytes[i]) & 0xff;
if (val < 16) {
hexValue.append("0");
}
hexValue.append(Integer.toHexString(val));
}
return hexValue.toString();
} catch (Exception e) {
return null;
}
}
/**
* Q学友SHA加密
* @param arr
* @return
*/
public static String gen(String... arr) {
if (StringUtils.isAnyEmpty(arr)) {
throw new IllegalArgumentException("非法请求参数，有部分参数为空 : " + Arrays.toString(arr));
} else {
Arrays.sort(arr);
StringBuilder sb = new StringBuilder();
String[] var2 = arr;
int var3 = arr.length;
for (int var4 = 0; var4 < var3; ++var4) {
String a = var2[var4];
sb.append(a);
}
return DigestUtils.sha1Hex(sb.toString());
}
}
public static String getNonce(int length) {
String val = "";
Random random = new Random();
//参数length，表示生成几位随机数
for (int i = 0; i < length; i++) {
val += String.valueOf(random.nextInt(10));
}
return val;
}
private static byte[] md5(String s)
{
MessageDigest algorithm;
try
{
algorithm = MessageDigest.getInstance("MD5");
algorithm.reset();
algorithm.update(s.getBytes(StandardCharsets.UTF_8));
byte[] messageDigest = algorithm.digest();
return messageDigest;
}
catch (Exception e)
{
}
return null;
}
private static final String toHex(byte[] hash)
{
if (hash == null)
{
return null;
}
StringBuffer buf = new StringBuffer(hash.length * 2);
int i;
for (i = 0; i < hash.length; i++)
{
if ((hash[i] & 0xff) < 0x10)
{
buf.append("0");
}
buf.append(Long.toString(hash[i] & 0xff, 16));
}
return buf.toString();
}
public static String hash(String s)
{
try
{
return new String(toHex(md5(s)).getBytes(StandardCharsets.UTF_8), StandardCharsets.UTF_8);
}
catch (Exception e)
{
return s;
}
}
public static void main(String[] args) {
String uuid = UUID.randomUUID().toString();
System.out.println(uuid.replace("-",""));
// System.out.println(hash(uuid+"ixihs"));
// System.out.println(System.currentTimeMillis());
}
}