java 如何修复 ClassNotFoundException：com.sun.mail.util.MailLogger？
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How can I fix ClassNotFoundException: com.sun.mail.util.MailLogger?
提问by Prince
I want to send email, My code is below
我想发送电子邮件，我的代码在下面
public static void main(String[] args) {
final String username = "[email protected]";
final String password = "password";
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");
Session session = Session.getInstance(props,
new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});
try {
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress("[email protected]"));
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse("[email protected]"));
message.setSubject("Testing Subject");
message.setText("Dear Mail Crawler,"
+ "\n\n No spam to my email, please!");
Transport.send(message);
System.out.println("Done");
} catch (MessagingException e) {
throw new RuntimeException(e);
}
}
POM.xml
POM文件
<dependency>
<groupId>javax.mail</groupId>
<artifactId>javax.mail-api</artifactId>
<version>1.5.5</version>
</dependency>
But getting exception
但得到例外
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/mail/util/MailLogger
at javax.mail.Session.initLogger(Session.java:230)
at javax.mail.Session.<init>(Session.java:214)
at javax.mail.Session.getInstance(Session.java:251)
at com.smart21.spring.utils.MailTest.main(MailTest.java:26)
Caused by: java.lang.ClassNotFoundException: com.sun.mail.util.MailLogger
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
回答by Kohei TAMURA
Try changing from:
尝试从：
<groupId>javax.mail</groupId>
to:
到：
<groupId>com.sun.mail</groupId>
回答by Hymankobec
The solution is to use correct dependency. For gradle:
解决方案是使用正确的依赖项。对于毕业：
// https://mvnrepository.com/artifact/javax.mail/mail
compile group: 'javax.mail', name: 'mail', version: '1.5.0-b01'
回答by Yoshita Mahajan
Try taking activation.jarand mail.jarfrom the Oracle website. This would help you resolve the error ClassNotFoundException: com.sun.mail.util.MailLogger.
尝试从 Oracle 网站获取activation.jar和mail.jar。这将帮助您解决错误ClassNotFoundException: com.sun.mail.util.MailLogger。
回答by Ashley Frieze
This is a duplicate of the issue in java.lang.NoClassDefFoundError: com/sun/mail/util/MailLogger for JUnit test case for Java mailand the answer that worked for me:
这是java.lang.NoClassDefFoundError: com/sun/mail/util/MailLogger for JUnit test case for Java mail中的问题的副本，以及对我有用的答案：
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.6.2</version>
</dependency>
