JAVA邮件发送的大致过程是这样的的：
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1、构建一个继承自javax.mail.Authenticator的具体类，并重写里面的getPasswordAuthentication()方法。此类是用作登录校验的，以确保你对该邮箱有发送邮件的权利。
2、构建一个properties文件，该文件中存放SMTP服务器地址等参数。
3、通过构建的properties文件和javax.mail.Authenticator具体类来创建一个javax.mail.Session。Session的创建，就相当于登录邮箱一样。剩下的自然就是新建邮件。
4、构建邮件内容，一般是javax.mail.internet.MimeMessage对象，并指定发送人，收信人，主题，内容等等。
5、使用javax.mail.Transport工具类发送邮件。
要实现邮件发送功能需要导入包：mail.jar
/*
* Generated by MyEclipse Struts
* Template path: templates/java/JavaClass.vtl
*/
package org.demo.action;
import java.util.Properties;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.demo.form.DemoForm;
public class DemoAction extends Action {
private static final String CONTENT_TYPE = "test/html;charset=GB2312";
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
DemoForm demoForm = (DemoForm) form;
System.out.println("标题是" + demoForm.getBiaoti());
System.out.println("内容是" + demoForm.getNeirong());
try {
response.setContentType(CONTENT_TYPE);
String smtphost = "smtp.nj.headware.cn"; // 发送邮件服务器
String user = "q0000015369"; // 邮件服务器登录用户名
String password = "Queshuwen26"; // 邮件服务器登录密码
String from = "q0000015369@nj.headware.cn"; //
String to = "c0000016205@nj.headware.cn"; // 收件人邮件地址
String subject = demoForm.getBiaoti(); // 邮件标题
String body = demoForm.getNeirong(); // 邮件内容
Properties props = new Properties();
props.put("mail.smtp.host", smtphost);
props.put("mail.smtp.auth", "true");
Session ssn = Session.getInstance(props, null);
MimeMessage message = new MimeMessage(ssn);
InternetAddress fromAddress = new InternetAddress(from);
message.setFrom(fromAddress);
InternetAddress toAddress = new InternetAddress(to);
message.addRecipient(Message.RecipientType.TO, toAddress);
message.setSubject(subject);
message.setText(body);
Transport transport = ssn.getTransport("smtp");
transport.connect(smtphost, user, password);
transport.sendMessage(message, message
.getRecipients(Message.RecipientType.TO));
// transport.send(message);
transport.close();
return mapping.findForward("succ");
} catch (Exception e) {
e.printStackTrace();
return mapping.findForward("fail");
}
}
}
import java.util.*;
import javax.mail.*;import javax.mail.internet.*;
public class JMail {
public void SendMail(String Topic,String Content){ Properties props=new Properties(); props.put("mail.smtp.host","smtp.163.com"); props.put("mail.smtp.auth","true"); Session s=Session.getInstance(props); s.setDebug(false); MimeMessage message=new MimeMessage(s); MimeMultipart mp=new MimeMultipart(); BodyPart body = new MimeBodyPart(); InternetAddress from; InternetAddress to; try{ from=new InternetAddress("发件人邮箱"); message.setFrom(from); to = new InternetAddress("收件人邮箱"); message.setRecipient(Message.RecipientType.TO,to); message.setSubject(Topic,"utf-8"); body.setContent(Content, "text/html;charset=utf-8"); mp.addBodyPart(body); message.setContent(mp); message.setSentDate(new Date()); message.saveChanges(); Transport transport=s.getTransport("smtp"); transport.connect("smtp.163.com(邮件服务商，这是163的)","发件邮箱","发件邮箱密码"); transport.sendMessage(message,message.getAllRecipients()); transport.close(); } catch(AddressException e){ e.printStackTrace(); } catch(MessagingException e){ e.printStackTrace(); } }}