Java 代码实现邮箱发送进行登录 Javamail

效果图

点击链接就可以跳转到要跳转的页面啦 ，注意 QQ 邮箱会发送到垃圾箱

代码
Dao 层

public class UserDao {
	public int add(User user) throws SQLException {
		String sql="insert into user values(?,?,?,?,?,?,?,?,?,?)";
		QueryRunner runner=new QueryRunner(DataSourceUtils.getDataSource());
		return runner.update(sql, user.getUid(), 
				user.getUsername(), user.getPassword(), user.getName(),
				user.getEmail(), user.getTelephone(), user.getBirthday(), user.getSex(), user.getState(),
				user.getCode());	
	}
}

Service 层

public class UserService {
	private UserDao ud=new UserDao();

	public boolean add(User user) {
		boolean flag=false;
		try {
			int a=ud.add(user);
			if (a>0) {
				flag=true;
			}
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return flag;
		
	}
}

Servlet 层

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.beanutils.ConvertUtils;
import org.apache.commons.beanutils.Converter;

import com.yinhe.bean.User;
import com.yinhe.service.UserService;
import com.yinhe.utils.MailUtils;
import com.yinhe.utils.UUIDutils;
public class UserServlet extends BaseServlet {

	private UserService us=new UserService();

	public void add(HttpServletRequest req, HttpServletResponse resp) throws IllegalAccessException, InvocationTargetException, IOException {
		// 封装user对象
		User user=new User();	
		Map<String, String[]> properties=req.getParameterMap();
		
		// 自定义类型转换器
		// 参数1：类型转换器  
		// 参数2：要转换至的类型
		ConvertUtils.register(new Converter() {	
			@Override
			// 参数一：要转换成的类型   arg0
			// 参数二：要转换的对象     arg1
			public Object convert(Class arg0, Object arg1) {
				// TODO Auto-generated method stub
				// 将字符串转data
				SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
				try {
					return sdf.parse(arg1.toString());
				} catch (ParseException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				return null;			
			}
		}, Date.class);
		// 封装属性
		BeanUtils.populate(user, properties);
		user.setUid(UUIDutils.getUUID());	
		boolean res=us.add(user);
		//页面提醒
		String emailMsg = "恭喜您注册成功，请点击下面的连接进行激活账户"
				+ "<a href='http://localhost:8080/ShopStore/login.jsp'>"+"http://localhost:8080/ShopStore/</a>";
		if (res) {
			try {
				MailUtils.sendMail(user.getEmail(), emailMsg);
				resp.sendRedirect("/ShopStore/registerSuccess.jsp");
			} catch (Exception e) {
				// TODO Auto-generated catch block
				resp.sendRedirect("/ShopStore/registerFail.jsp");
			}
		}else{		
			resp.sendRedirect("/ShopStore/login.jsp");
		}		
	}		
}

要成功发送邮件，就必须要用 MailUtils 这个工具类，可以说是 Javamail 的核心，还需要一个 jar 包哦 cd52f0e18a0e44049cf665bbb0ca1d4c-mail.jar

工具类代码

import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
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.internet.MimeMessage.RecipientType;

public class MailUtils {

	public static void sendMail(String email, String emailMsg)
			throws AddressException, MessagingException {
		// 1.创建一个程序与邮件服务器会话对象 Session

		Properties props = new Properties();
		props.setProperty("mail.transport.protocol", "SMTP");
		props.setProperty("mail.host", "smtp.163.com");
		props.setProperty("mail.smtp.auth", "true");// 指定验证为true

		// 创建验证器
		Authenticator auth = new Authenticator() {
			public PasswordAuthentication getPasswordAuthentication() {
				return new PasswordAuthentication("你的邮箱@163.com", "安全码");
			}
		};

		Session session = Session.getInstance(props, auth);

		// 2.创建一个Message，它相当于是邮件内容
		Message message = new MimeMessage(session);

		message.setFrom(new InternetAddress("你的邮箱@163.com")); // 设置发送者

		message.setRecipient(RecipientType.TO, new InternetAddress(email)); // 设置发送方式与接收者

		message.setSubject("用户激活");
		// message.setText("这是一封激活邮件，请<a href='#'>点击</a>");

		message.setContent(emailMsg, "text/html;charset=utf-8");

		// 3.创建 Transport用于将邮件发送

		Transport.send(message);
	}
}