我想用户注册后发送一封确认邮件。我使用JavaMail库用于此目的和Java 8 Base64编码的Util类。
我编码用户电子邮件的方式如下:
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);
其中confirmationURL
是:
private final static String confirmationURL = "http://localhost:8080/project/controller?command=confirmRegistration&ID=";
然后在ConfirmRegistrationCommand以这样的方式进行解码这样的:
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:
http://localhost:8080/project/controller?command=confirmRegistration&ID=[B@6499375d
我越来越java.lang.IllegalArgumentException: Illegal base64 character 5b
。
我试图用基本的编码/解码器(未URL的),但没有成功。
解决了:
问题是下一个 - 行:
String confirmLink = "Complete your registration by clicking on following"+ "\n<a href='" + confirmationURL + encodedEmail + "'>link</a>";
我的字节数组上调用toString,所以我应该做到以下几点:
String encodedEmail = new String(Base64.getEncoder().encode(
user.getEmail().getBytes(StandardCharsets.UTF_8)));
由于乔恩斯基特和ByteHamster。
您的编码文本是[B@6499375d
。这不是Base64的,东西,而编码出了问题。这解码代码看起来不错。
使用此代码,将其添加到网址前的字节[]转换成字符串:
String encodedEmailString = new String(encodedEmail, "UTF-8");
// ...
String confirmLink = "Complete your registration by clicking on following"
+ "\n<a href='" + confirmationURL + encodedEmailString + "'>link</a>";
我遇到了这个错误,因为我的编码图像开始data:image/png;base64,iVBORw0...
。
This answer导致我的解决方案:
String partSeparator = ",";
if (data.contains(partSeparator) {
String encodedImg = data.split(partSeparator)[1];
byte[] decodedImg = Base64.getDecoder().decode(encodedImg.getBytes(StandardCharsets.UTF_8));
Path destinationFile = Paths.get("/path/to/imageDir", "myImage.jpg");
Files.write(destinationFile, decodedImg);
}
只需使用下面的代码来解决此问题:
JsonObject obj = Json.createReader(new ByteArrayInputStream(Base64.getDecoder().decode(accessToken.split("\\.")[1].
replace('-', '+').replace('_', '/')))).readObject();
在上面的代码replace('-', '+').replace('_', '/')
做的工作。欲了解更多详细信息,请参阅https://jwt.io/js/jwt.js。我的理解从代码的一部分的问题,从该链接了:
function url_base64_decode(str) {
var output = str.replace(/-/g, '+').replace(/_/g, '/');
switch (output.length % 4) {
case 0:
break;
case 2:
output += '==';
break;
case 3:
output += '=';
break;
default:
throw 'Illegal base64url string!';
}
var result = window.atob(output); //polifyll https://github.com/davidchambers/Base64.js
try{
return decodeURIComponent(escape(result));
} catch (err) {
return result;
}
}
该Base64.Encoder.encodeToString方法自动使用ISO-8859-1字符集。
对于加密工具我写,我把密文的输入字符串和Base64编码它的传输,然后逆转的过程。下面示出相关部分。注:我的file.encoding属性在JVM的调用设置为ISO-8859-1,这样也可以有一个轴承。
static String getBase64EncodedCipherText(String cipherText) {
byte[] cText = cipherText.getBytes();
// return an ISO-8859-1 encoded String
return Base64.getEncoder().encodeToString(cText);
}
static String getBase64DecodedCipherText(String encodedCipherText) throws IOException {
return new String((Base64.getDecoder().decode(encodedCipherText)));
}
public static void main(String[] args) {
try {
String cText = getRawCipherText(null, "Hello World of Encryption...");
System.out.println("Text to encrypt/encode: Hello World of Encryption...");
// This output is a simple sanity check to display that the text
// has indeed been converted to a cipher text which
// is unreadable by all but the most intelligent of programmers.
// It is absolutely inhuman of me to do such a thing, but I am a
// rebel and cannot be trusted in any way. Please look away.
System.out.println("RAW CIPHER TEXT: " + cText);
cText = getBase64EncodedCipherText(cText);
System.out.println("BASE64 ENCODED: " + cText);
// There he goes again!!
System.out.println("BASE64 DECODED: " + getBase64DecodedCipherText(cText));
System.out.println("DECODED CIPHER TEXT: " + decodeRawCipherText(null, getBase64DecodedCipherText(cText)));
} catch (Exception e) {
e.printStackTrace();
}
}
输出看起来像:
Text to encrypt/encode: Hello World of Encryption...
RAW CIPHER TEXT: q$;�C�l��<8��U���X[7l
BASE64 ENCODED: HnEPJDuhQ+qDbInUCzw4gx0VDqtVwef+WFs3bA==
BASE64 DECODED: q$;�C�l��<8��U���X[7l``
DECODED CIPHER TEXT: Hello World of Encryption...
我得到这个错误我的Linux詹金斯奴隶。我固定它由从节点改变了“已知的主机文件验证战略”到“非验证验证策略”。