JAR包:commons-email-1.4.jar
代码:`
public static void send(String subject, String msg) {
try {
System.out.println("从properites取参数");
ResourceBundle config = ResourceBundle.getBundle("email");
String hostName = config.getString("hostName");
String userName = config.getString("userName");
String password = config.getString("password");
String sender = config.getString("sender");
String reciever = config.getString("reciever");
SimpleEmail email = new SimpleEmail();
email.setHostName(hostName);
email.setAuthentication(userName, password);
email.setSSLOnConnect(true);
email.setFrom(sender);
email.setCharset("utf-8");
email.setSubject(subject);
email.setMsg(msg);
email.addTo(reciever);
System.out.println("开始发送");
email.send();
System.out.println("发送完毕");
}catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
send("主题","文本");
}`
报错:`
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/mail/util/BEncoderStream
at javax.mail.internet.MimeUtility.doEncode(MimeUtility.java:664)
at javax.mail.internet.MimeUtility.encodeWord(MimeUtility.java:643)
at javax.mail.internet.MimeUtility.encodeText(MimeUtility.java:444)
at javax.mail.internet.MimeMessage.setSubject(MimeMessage.java:793)
at org.apache.commons.mail.Email.buildMimeMessage(Email.java:1284)
at org.apache.commons.mail.Email.send(Email.java:1447)
`
然后查资料说是和Myeclipse自带JAR包冲突,遂直接发布Tomcat中测试,还是报错:
java.lang.NoClassDefFoundError: javax/mail/Message
at sun.reflect.GeneratedMethodAccessor91.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:64)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:53)
at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:178)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:292)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
这两个错误不知道是不是相同的原因引起的,熟悉邮件发送的同学、高手、大神给解释一下原因并给出解决方案,感谢~~
错误已经解决,缺少了javamail-1.4.3.jar,因为commons-email项目是在javamail项目基础上开发的。另外,有同学说,javaee1.6下,内部存在javamail可以省略,但是我的项目是javaee1.5、tomcat6所以...
最后,发送人邮箱尽量不要用qq邮箱,一堆授权码都要搞晕了,推荐使用网易163、126的邮箱。使用时,先进邮箱界面在设置中开启smtp服务,并且查看相应(smtp)服务器地址,126服务器地址为smtp.126.com。
非大神,勿喷
NoClassDefFoundError错误的发生,是因为Java虚拟机在编译时能找到合适的类,而在运行时不能找到合适的类导致的错误。例如在运行时我们想调用某个类的方法或者访问这个类的静态成员的时候,发现这个类不可用,此时Java虚拟机就会抛出NoClassDefFoundError错误。与ClassNotFoundException的不同在于,这个错误发生只在运行时需要加载对应的类不成功,而不是编译时发生。NoClassDefFoundError发生在编译时对应的类可用,而运行时在Java的classpath路径中,对应的类不可用导致的错误。
可能引起的问题:
1.jar包冲突,你看一下pom.xml中的jar包依赖关系,是不是maven在解决jar包仲裁的时候,选择的jar包并不是你所想要的jar包。
2.根本没有引入jar包,通过nexus,引入jar包的GAV三个参数就可以了。
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4.5</version>
</dependency>
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1.1</version>
</dependency>
如果你用的是 maven 的话可以加上这段配置试下。