邮件发送和接收已经全部实现，大家在转发市请注明出处(我这也是参考了N多大牛的作品)：
//发送邮件类：
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
public class SendMail {
public boolean Send(MailInfo mailInfo)throws Exception{
Properties props=new Properties();
//设置发送邮件的邮件服务器的属性（这里使用网易的smtp服务器）
props.put("mail.smtp.host", mailInfo.getHost());
//需要经过授权，也就是有户名和密码的校验，这样才能通过验证（一定要有这一条）
props.put("mail.smtp.auth", mailInfo.getValidate());
Session session=Session.getDefaultInstance(props);// 用刚刚设置好的props对象构建一个session
session.setDebug(true);
MimeMessage message=new MimeMessage(session);
try{
message.setFrom(new InternetAddress(mailInfo.getFromAddress()));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(mailInfo.getToAddress()));
message.setSubject(mailInfo.getSubject());
message.setSentDate(mailInfo.getSentdate());
//向multipart对象中添加邮件的各个部分内容，包括文本内容和附件
Multipart multipart=new MimeMultipart();
BodyPart contentPart=new MimeBodyPart();
contentPart.setText(mailInfo.getContent());
multipart.addBodyPart(contentPart);
//添加附件
if(mailInfo.getFilepath()!=null){
BodyPart messageBodyPart=new MimeBodyPart();
DataSource source=new FileDataSource(mailInfo.getFilepath());
messageBodyPart.setDataHandler(new DataHandler(source));
sun.misc.BASE64Encoder enc=new sun.misc.BASE64Encoder();
String fname=mailInfo.getFilename();
if(fname!=null){
messageBodyPart.setFileName("=?GBK?B?"+enc.encode(fname.getBytes())+"?=");
// messageBodyPart.setFileName(MimeUtility.encodeText(fname));
multipart.addBodyPart(messageBodyPart);
}else{
String lname=mailInfo.getFilepath().substring(mailInfo.getFilepath().lastIndexOf("\\")+1, mailInfo.getFilepath().length());
System.out.println(lname);
messageBodyPart.setFileName("=?GBK?B?"+enc.encode(lname.getBytes())+"?=");
// messageBodyPart.setFileName(MimeUtility.encodeText(lname));
multipart.addBodyPart(messageBodyPart);
}
}
message.setContent(multipart);//text/plain表示纯文本内容
message.saveChanges();
Transport transport=session.getTransport("smtp");
transport.connect(mailInfo.getHost(),mailInfo.getUsername(),mailInfo.getPassword());
transport.sendMessage(message,message.getAllRecipients());
transport.close();
return true;
}catch(Exception e){
e.printStackTrace();
}
return false;
}
}