用Tomcat内置容器JNDI创建一个Session来实现注册成功后给用户发送一条邮件
首先在tomcat安装目录下的lib目录下导入两个jar包：activation.jar 和mail.jar
简陋的注册页面
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>注册页面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<form action="${pageContext.request.contextPath }/servlet/RegisterServlet">
用户名:<input type="text" name="username"><br/>
密码:<input type="password" name="password"><br/>
邮箱:<input type="text" name="mail"><br/>
<input type="submit" value="提交">
</form>
</body>
</html>
处理注册功能的servlet
package cn.lfd.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 cn.lfd.domain.User;
import cn.lfd.utils.SendMail;
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 mail = request.getParameter("mail");
User user = new User();
user.setPasswrod(password);
user.setUsername(username);
user.setMail(mail);
SendMail send = new SendMail(user);//起一个线程发送邮件
send.start();
System.out.println("把用户信息注册到数据库中");
request.setAttribute("message", "恭喜你注册成功!我们已经给你发送了一份注册成功的邮件，请注意查收，若暂时没有收到，可能是网络原因，请等待一会再收！！！");
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);
}
}
发送邮件的线程：
package cn.lfd.utils;
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.naming.Context;
import javax.naming.InitialContext;
import cn.lfd.domain.User;
/*
* 发送邮件的线程
*/
public class SendMail extends Thread {
private User user;
private static String from = "[email protected]";//邮件发送账户
private static String host = "smtp.163.com";//邮件服务器地址
private static String username = "18770913843";//用户名
private static String password = "lfdlovehtzyy000";//密码
public SendMail(User user) {
this.user = user;
}
@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");*/
//通过jndi创建session
Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");
Session session = (Session) envCtx.lookup("mail/Session");
//Session session = Session.getInstance(prop);
Message message = makeMessage(session, user);
Transport ts = session.getTransport();
ts.connect(host, username, password);//与邮件服务器建立连接
ts.sendMessage(message, message.getAllRecipients());
}catch(Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
//创建一封注册邮件
private Message makeMessage(Session session, User user) throws Exception {
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.setRecipient(Message.RecipientType.TO, new InternetAddress(user.getMail()));
message.setSubject("注册邮件");
String info = "恭喜你注册成功，你的用户名是"+user.getUsername()+", 密码是"+user.getPasswrod()+",请妥善保管你的用户名和密码！！！";
message.setContent(info, "text/html;charset=UTF-8");
message.saveChanges();
return message;
}
}
用户实体类:User
package cn.lfd.domain;
public class User {
private String username;
private String passwrod;
private String mail;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPasswrod() {
return passwrod;
}
public void setPasswrod(String passwrod) {
this.passwrod = passwrod;
}
public String getMail() {
return mail;
}
public void setMail(String mail) {
this.mail = mail;
}
}
最后在Web-Root下面的META-INF下面创建一个context.xml文件
<Context>
<Resource name="mail/Session" auth="Container"
type="javax.mail.Session"
mail.smtp.host="smtp.163.com"
mail.transport.protocol="smtp"
mail.smtp.auth="true"/>
</Context>最后进入工程的lib目录下把
activation.jar 和mail.jar删了
重启服务器后就可以
一点注册服务器就会向注册者的邮箱发送一条邮件