用户注册（三）—–邮件激活详解编程语言

用户注册时，为了确保用户的有效性以及系统的安全性，通常需要用户填写邮箱，用户在登陆之前需要先到邮箱进行账号的激活操作。 
本地演示时需要准备邮件服务器，可以使用eyoumailserversetup.exe，下载安装后软件如下： 

安装之后可以右键新建账号进行测试。

准备邮件发送的util。
mail.properties:

mail_host = 127.0.0.1 
admin_username = admin 
admin_password = 1234 
admin_domain = liu-pc.com 
active_url = http://localhost:8080/ebookstore/client/activeUserServlet?activeUUID= 
 

MailUtils：

package com.ebookstore.util; 
 
import java.util.Properties; 
import java.util.ResourceBundle; 
 
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.InternetAddress; 
import javax.mail.internet.MimeMessage; 
 
import com.ebookstore.bean.User; 
 
public class MailUtils { 
 
    /** 
     * 给指定用户发送邮件 
     *  
     * @param user 
     * @throws MessagingException 
     */ 
    public static void send(User user) throws MessagingException { 
        ResourceBundle bundle = ResourceBundle.getBundle("mail"); 
        String mail_host = bundle.getString("mail_host"); // 主机地址 
        String admin_username = bundle.getString("admin_username"); // 发送邮件用户名 
        String admin_password = bundle.getString("admin_password"); // 发送邮件密码 
        String admin_domain = bundle.getString("admin_domain"); // 域名 
        String active_url = bundle.getString("active_url"); // 激活url地址 
        // 发邮件 
        // 0.1 基本参数 
        Properties props = new Properties(); 
        props.setProperty("mail.host", mail_host); 
        props.setProperty("mail.smtp.auth", "true"); 
        // 0.2 认证信息 
        Authenticator authenticator = new MyAuthenticator(admin_username,admin_password); 
        // 1 获得会话 
        Session session = Session.getDefaultInstance(props, authenticator); 
        // 2编写消息 
        Message message = new MimeMessage(session); 
        // 2.1 发件人 
        message.setFrom(new InternetAddress(admin_username + "@" + admin_domain)); // [email protected] 
        // 2.2 收件人 
        message.setRecipient(RecipientType.TO,new InternetAddress(user.getEmail())); 
        // 2.3 主题 
        message.setSubject("“网络图书商城”用户注册激活邮件"); 
        // 2.4 正文 
        String url = active_url + user.getActiveUUID(); 
        String data = user.getUserName() + "，你好：<br/>" 
                + " 您在本书城注册了用户，请<a href='" + url 
                + "'>点击</a>激活，或复制下面的链接进行激活<br/>" + url + " <br/>" 
                + "如果不是本人，请删除邮件"; 
 
        message.setContent(data, "text/html;charset=UTF-8"); 
        // 3 发送邮件 
        Transport.send(message); 
 
    } 
 
} 
 
class MyAuthenticator extends Authenticator { 
    private String admin_password; 
    private String admin_username; 
 
    public MyAuthenticator(String admin_username, String admin_password) { 
        this.admin_username = admin_username; 
        this.admin_password = admin_password; 
    } 
 
    public PasswordAuthentication getPasswordAuthentication() { 
        return new PasswordAuthentication(admin_username, admin_password); 
    } 
} 

注册用户时在数据存入数据库之前发送邮件：

public boolean registerUser(User user) { 
        Connection conn = null; 
        try { 
            conn = JdbcUtils.getConnection(); 
            //# 1 开启事务 
            conn.setAutoCommit(false); 
            //发送激活邮件 
            MailUtils.send(user); 
            //添加 
            boolean r = userDao.save(conn,user); 
            //# 2 提交事务 
            conn.commit(); 
            return r; 
        } catch (Exception e) { 
            //# 3 回滚事务 
            DbUtils.rollbackAndCloseQuietly(conn); 
            throw new RuntimeException(e.getMessage(),e); 
        } 
    }

激活处理的servlet:

public void doPost(HttpServletRequest request, HttpServletResponse response) 
            throws ServletException, IOException { 
        //1 获得数据 
        String activeUUID = request.getParameter("activeUUID"); 
        //2 执行操作--激活 
        BusinessService service = new BusinessService(); 
        boolean returnMsg = service.activeUser(activeUUID); 
        //3提示 
        if(returnMsg){ 
            request.setAttribute("message", "用户激活成功，请<a href='#'>登录</a>"); 
        } else { 
            request.setAttribute("message", "用户没有激活成功，请重新激活"); 
        } 
        //转发 
        request.getRequestDispatcher("/message.jsp").forward(request, response); 
    }

邮箱显示效果：