如何使用JavaMail发送邮件

<%@ page language="java" pageEncoding="UTF-8"%>


 
  
 
 
 
  
    用户名：

    密码：

    邮箱：

    
  
 

<%@ page language="java" pageEncoding="UTF-8"%>


 
  
 
 
 
    ${message}
 

package me.gacl.domain;

public class User {
  private String username;
  private String password;
  private String email;
  public String getUsername() {
    return username;
  }
  public void setUsername(String username) {
    this.username = username;
  }
  public String getPassword() {
    return password;
  }
  public void setPassword(String password) {
    this.password = password;
  }
  public String getEmail() {
    return email;
  }
  public void setEmail(String email) {
    this.email = email;
  }
}

package me.gacl.web.controller;

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 me.gacl.domain.User;

/**
* @ClassName: Sendmail
* @Description: Sendmail类继承Thread，因此Sendmail就是一个线程类，这个线程类用于给指定的用户发送Email
* @author: 孤傲苍狼
* @date: 2015-1-12 下午10:43:48
*
*/ 
public class Sendmail extends Thread {
    //用于给用户发送邮件的邮箱
  private String from = "gacl@sohu.com";
    //邮箱的用户名
  private String username = "gacl";
    //邮箱的密码
  private String password = "邮箱密码";
    //发送邮件的服务器地址
  private String host = "smtp.sohu.com";
  
  private User user;
  public Sendmail(User user){
    this.user = user;
  }
  
  /* 重写run方法的实现，在run方法中发送邮件给指定的用户
   * @see java.lang.Thread#run()
   */
  @Override
  public void run() {
    try{
      Properties prop = new Properties();
      prop.setProperty("mail.host", host);
      prop.setProperty("mail.transport.protocol", "smtp");
      prop.setProperty("mail.smtp.auth", "true");
      Session session = Session.getInstance(prop);
      session.setDebug(true);
      Transport ts = session.getTransport();
      ts.connect(host, username, password);
      Message message = createEmail(session,user);
      ts.sendMessage(message, message.getAllRecipients());
      ts.close();
    }catch (Exception e) {
      throw new RuntimeException(e);
    }
  }
  
  /**
  * @Method: createEmail
  * @Description: 创建要发送的邮件
  * @Anthor:孤傲苍狼
  *
  * @param session
  * @param user
  * @return
  * @throws Exception
  */ 
  public Message createEmail(Session session,User user) throws Exception{
    
    MimeMessage message = new MimeMessage(session);
    message.setFrom(new InternetAddress(from));
    message.setRecipient(Message.RecipientType.TO, new InternetAddress(user.getEmail()));
    message.setSubject("用户注册邮件");
    
    String info = "恭喜您注册成功，您的用户名：" + user.getUsername() + ",您的密码：" + user.getPassword() + "，请妥善保管，如有问题请联系网站客服!!";
    message.setContent(info, "text/html;charset=UTF-8");
    message.saveChanges();
    return message;
  }
}

package me.gacl.web.controller;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import me.gacl.domain.User;
import me.gacl.service.UserService;

public class RegisterServlet extends HttpServlet {

  public void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    try{
      String username = request.getParameter("username");
      String password = request.getParameter("password");
      String email = request.getParameter("email");
      User user = new User();
      user.setEmail(email);
      user.setPassword(password);
      user.setUsername(username);
      
      System.out.println("把用户信息注册到数据库中");
      //用户注册成功之后就使用用户注册时的邮箱给用户发送一封Email
      //发送邮件是一件非常耗时的事情，因此这里开辟了另一个线程来专门发送邮件
      Sendmail send = new Sendmail(user);
      //启动线程，线程启动之后就会执行run方法来发送邮件
      send.start();
      
      //注册用户
      //new UserService().registerUser(user);
      request.setAttribute("message", "恭喜您，注册成功，我们已经发了一封带了注册信息的电子邮件，请查收，如果没有收到，可能是网络原因，过一会儿就收到了！！");
      request.getRequestDispatcher("/message.jsp").forward(request, response);
    }catch (Exception e) {
      e.printStackTrace();
      request.setAttribute("message", "注册失败！！");
      request.getRequestDispatcher("/message.jsp").forward(request, response);
    }
  }

  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    doGet(request, response);
  }
}