实现邮件发送代码

邮件发送代码书写

1.导包

mail.jar

2.书写代码

package com.itcast.mail;

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 {

	//email:邮件发给谁  subject:主题  emailMsg：邮件的内容
	public static void sendMail(String email, String subject, 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");//发邮件的协议
		props.setProperty("mail.host", "localhost");//发送邮件的服务器地址
		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("tom", "123456");//发邮件的账号的验证
			}
		};

		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("[email protected]")); // 设置发送者

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

		message.setSubject(subject);//邮件的主题

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

		// 3.创建 Transport用于将邮件发送
		Transport.send(message);
	}
}

package com.itcast.mail;


import javax.mail.MessagingException;
import javax.mail.internet.AddressException;


public class SendMailTest {


	public static void main(String[] args) throws AddressException, MessagingException {
		
		MailUtils.sendMail("[email protected]", "测试邮件","这是一封测试邮件");
		
		
	}
	
}

实现定时发送生日祝福

package com.itcast.birthday;

import java.sql.SQLException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

import javax.mail.MessagingException;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import com.itcast.mail.MailUtils;

public class BirthdayListenner implements ServletContextListener {

	@Override
	public void contextDestroyed(ServletContextEvent arg0) {
		// TODO Auto-generated method stub

	}

	@Override
	public void contextInitialized(ServletContextEvent arg0) {
		// 当web应用器开启任务调动--功能在用户的生日当前发送邮件
		// 开启一个定时器
		Timer timer = new Timer();
		timer.scheduleAtFixedRate(new TimerTask() {

			@Override
			public void run() {
				// 为当前的生日的用户发送邮件
				//1.获得今天过生日的人
//				获得今天的日期
				SimpleDateFormat format=new SimpleDateFormat();
				String currentDate=format.format(new Date());
//				根据当前时间从数据查询今天过生日的人
				QueryRunner runner =new QueryRunner(DataSourceUtils.getDataSource());
				String sql="select * from customer where birthday like ?";
				List<Customer> customerList=null;
				try {
					 customerList = runner.query(sql,new BeanListHandler<Customer>(Customer.class), "%"+currentDate+"%");
				} catch (SQLException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
//				2.发邮件
				if(customerList!=null&&customerList.size()>0){
					for(Customer c:customerList){
						String emailMsg="亲爱的lucy"+c.getRealname();
						try {
							MailUtils.sendMail(c.getEmail(), "ceshi", emailMsg);
							System.out.println(c.getRealname());
						} catch (MessagingException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
					}
				}
			}
		}, new Date(), 1000*30);
		// 实际开发中起始时间是一个固定的时间
		// 实际开发中间时间是一天
	}

}

package com.itcast.birthday;


public class Customer {


	private String username;
	private String password;
	private String realname;
	private String bithday;
	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 getRealname() {
		return realname;
	}
	public void setRealname(String realname) {
		this.realname = realname;
	}
	public String getBithday() {
		return bithday;
	}
	public void setBithday(String bithday) {
		this.bithday = bithday;
	}
	public String getEmail() {
		return email;
	}
	public void setEmail(String email) {
		this.email = email;
	}


}