JavaMail - 注册登陆邮箱验证激活

前言：

1、邮件发送协议 - SMTP，默认端口号 25。

用于把用户邮件从一个服务器转到下一个服务器

2、邮件接收协议 - POP3，默认端口号 110。

用于支持使用客户端远程管理在服务器上的电子邮件

3、搭建邮件服务器（易邮邮件服务器 + Foxmail）：

核心Jar包

核心代码

package com.jy.utils;

import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.Message.RecipientType;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.search.RecipientStringTerm;
import sun.nio.cs.MS1250;

/**
 * 邮箱工具
 */
public class MailUtil {
	
	public static void sendMail(String to,String code) throws Exception{

		// 1.创建连接对象
		Session session = Session.getDefaultInstance(new Properties(), new Authenticator() {
			@Override
			protected PasswordAuthentication getPasswordAuthentication() {
				return new PasswordAuthentication(\"service@dt.com\", \"123456\");
			}
		});

		// 2.创建邮件对象
		Message message = new MimeMessage(session);
		message.setFrom(new InternetAddress(\"service@dt.com\"));
		message.setRecipient(RecipientType.TO, new InternetAddress(to));

		//主题
		message.setSubject(\"来自dt的激活邮件\");

		//正文
		message.setContent(\"<h1>来自dt的激活邮件，点击链接激活账号：</h1><h3><a href=\'http://localhost:8081/javamail01/active?code=\"+code+\"\'>http://localhost:8081/javamail01/active?code=\"+code+\"</a></h3>\", \"text/html;charset=utf-8\");

		// 3.发送激活邮件
		Transport.send(message);
	}
}

package com.jy.web.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.jy.domain.User;
import com.jy.service.UserService;
import com.jy.service.impl.UserServiceImpl;
import com.jy.utils.UUIDUtil;

@WebServlet(urlPatterns=\"/regist\")
public class RegistServlet extends HttpServlet{

	private static final long serialVersionUID = 1L;

	@Override
	protected void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
		try{
			req.setCharacterEncoding(\"utf-8\");
			res.setCharacterEncoding(\"utf-8\");

			String username = req.getParameter(\"username\");
			String password = req.getParameter(\"password\");
			String nickname = req.getParameter(\"nickname\");
			String email = req.getParameter(\"email\");

			User user = new User();
			user.setNickname(nickname);
			user.setUsername(username);
			user.setCode(UUIDUtil.code());
			user.setStatus(0);  // 状态码，0未激活，1激活
			user.setEmail(email);
			user.setPassword(password);

			UserService userService = new UserServiceImpl();
			userService.save(user);

			req.setAttribute(\"msg\", \"注册成功，请邮箱激活\");
			req.getRequestDispatcher(\"/msg.jsp\").forward(req, res);

		}catch(Exception e){
			
		}
	}
}

package com.jy.web.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.jy.domain.User;
import com.jy.service.UserService;
import com.jy.service.impl.UserServiceImpl;

/**
 * 激活注册邮箱
 */
@WebServlet(urlPatterns=\"/active\")
public class ActiveServlet extends HttpServlet{
	
	private static final long serialVersionUID = 1L;

	@Override
	protected void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
		try{
			req.setCharacterEncoding(\"utf-8\");
			res.setCharacterEncoding(\"utf-8\");

			String code = req.getParameter(\"code\");
			UserService userService = new UserServiceImpl();
			User user = userService.findByCode(code);
			if(user!=null){
				// 已经激活
				user.setStatus(1);
				user.setCode(null);
				userService.update(user);
				req.setAttribute(\"msg\", \"激活成功，请登录\");
			}else{
				// 激活失败
				req.setAttribute(\"msg\", \"激活失败，重新激活\");
			}

			req.getRequestDispatcher(\"/msg.jsp\").forward(req, res);

		}catch(Exception e){
			
		}
	}
}

<%@ page language=\"java\" contentType=\"text/html; charset=UTF-8\"
    pageEncoding=\"UTF-8\"%>
<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">
<html>
<head>
<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">
<title>Insert title here</title>
</head>
<body>
	<h1>用户注册的页面</h1>
	<form action=\"regist\" method=\"post\">
		<table width=\"600\" border=\"1\">
			<tr>
				<td>用户名：</td>
				<td><input type=\"text\" name=\"username\"/></td>
			</tr>
			<tr>
				<td>密码：</td>
				<td><input type=\"password\" name=\"password\"/></td>
			</tr>
			<tr>
				<td>昵称：</td>
				<td><input type=\"text\" name=\"nickname\"/></td>
			</tr>
			<tr>
				<td>邮箱：</td>
				<td><input type=\"text\" name=\"email\"/></td>
			</tr>
			<tr>
				<td colspan=\"2\"><input type=\"submit\" value=\"提交\"></td>
			</tr>
		</table>
	</form>
	
</body>
</html>

<%@ page language=\"java\" contentType=\"text/html; charset=UTF-8\"
    pageEncoding=\"UTF-8\"%>
<!DOCTYPE html PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">
<html>
<head>
<meta http-equiv=\"Content-Type\" content=\"text/html; charset=UTF-8\">
<title>信息反馈页面</title>
</head>
<body>
	${msg}
</body>
</html>

源码下载：https://download.csdn.net/download/dream_weave/10869560