java字符串MD5加密后再转16进制

话不多说上码

pom.xml

 <!-- MD5 -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.3.2</version>
</dependency>
public static byte[] digest(String signStr) {
MessageDigest md5Instance = null;
try {
md5Instance = MessageDigest.getInstance("MD5");
md5Instance.update(signStr.getBytes("utf-8"));
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return md5Instance.digest();
}

得到byte数据,转16进制后的字符串

//加密后转
private static String byte2Hex(byte[] bytes) {
char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
int j = bytes.length;
char str[] = new char[j * 2];
int k = 0;
for (byte byte0 : bytes) {
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
return new String(str);
}

最终得到你想要的

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