base64:java.lang.IllegalArgumentException：非法字符

Question

我正在尝试在用户注册后发送确认邮件。为此，我使用了JavaMail库和Java8 Base64 util类。

byte[] encodedEmail = Base64.getUrlEncoder().encode(user.getEmail().getBytes(StandardCharsets.UTF_8));
Multipart multipart = new MimeMultipart();
InternetHeaders headers = new InternetHeaders();
headers.addHeader("Content-type", "text/html; charset=UTF-8");
String confirmLink = "Complete your registration by clicking on following"+ "\n<a href='" + confirmationURL + encodedEmail + "'>link</a>";
MimeBodyPart link = new MimeBodyPart(headers,
confirmLink.getBytes("UTF-8"));
multipart.addBodyPart(link);

private final static String confirmationURL = "http://localhost:8080/project/controller?command=confirmRegistration&ID=";

然后以如下方式在ConfirmRegistrationCommand中解码：

    String encryptedEmail = request.getParameter("ID");

    String decodedEmail = new String(Base64.getUrlDecoder().decode(encryptedEmail), StandardCharsets.UTF_8);

    RepositoryFactory repositoryFactory = RepositoryFactory
            .getFactoryByName(FactoryType.MYSQL_REPOSITORY_FACTORY);
    UserRepository userRepository = repositoryFactory.getUserRepository();
    User user = userRepository.find(decodedEmail);

    if (user.getEmail().equals(decodedEmail)) {
        user.setActiveStatus(true);
        return Path.WELCOME_PAGE;
    } else {
        return Path.ERROR_PAGE;
    }

当我试图解码时：

http://localhost:8080/project/controller?command=confirmRegistration&ID=[B@6499375d

我正在获取java.lang.IllegalArgumentException：非法的base64字符5b。

我尝试使用基本的编码/解码器（不是URL的）没有成功。

已解决：

 String confirmLink = "Complete your registration by clicking on following"+ "\n<a href='" + confirmationURL + encodedEmail + "'>link</a>";

String encodedEmail = new String(Base64.getEncoder().encode(
                user.getEmail().getBytes(StandardCharsets.UTF_8)));

Answer 1

您的编码文本是[b@6499375d。这不是Base64，编码时出了问题。解码代码看起来不错。

在将字节[]添加到URL之前,使用以下代码将其转换为字符串：

String encodedEmailString = new String(encodedEmail, "UTF-8");
// ...
String confirmLink = "Complete your registration by clicking on following"
    + "\n<a href='" + confirmationURL + encodedEmailString + "'>link</a>";