private String hex(String content) {
        return DigestUtils.md5DigestAsHex(content.getBytes(StandardCharsets.UTF_8));
    }
private String hex(String content) {
        return DigestUtils.md5DigestAsHex(content.getBytes(StandardCharsets.UTF_8));
    }
private String hex ( String content ) { return DigestUtils . md5DigestAsHex ( content . getBytes ( StandardCharsets . UTF_8 ) ) ; }
Hex String

@param content origin string
@return hex
Hex String