用java写一个邮件发送代码

public boolean mainto()

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{

boolean flag = true;

//建立邮件会话

Properties pro = new Properties();

pro.put("mail.smtp.host","smtp.qq点抗 ");//存储发送邮件的服务器

pro.put("mail.smtp.auth","true"); //通过服务器验证

Session s =Session.getInstance(pro); //根据属性新建一个邮件会话

//s.setDebug(true);

//由邮件会话新建一个消息对象

MimeMessage message = new MimeMessage(s);

//设置邮件

InternetAddress fromAddr = null;

InternetAddress toAddr = null;

try

{

fromAddr = new InternetAddress(451144426+"@qq点抗 "); //邮件发送地址

message.setFrom(fromAddr); //设置发送地址

toAddr = new InternetAddress("12345367@qq点抗 "); //邮件接收地址

message.setRecipient(Message.RecipientType.TO, toAddr); //设置接收地址

message.setSubject(title); //设置邮件标题

message.setText(content); //设置邮件正文

message.setSentDate(new Date()); //设置邮件日期

message.saveChanges(); //保存邮件更改信息

Transport transport = s.getTransport("smtp");

transport.connect("smtp.qq点抗 ", "451144426", "密码"); //服务器地址，邮箱账号，邮箱密码

transport.sendMessage(message, message.getAllRecipients()); //发送邮件

transport.close();//关闭

}

catch (Exception e)

{

e.printStackTrace();

flag = false;//发送失败

}

return flag;

}

这是一个javaMail的邮件发送代码，需要一个mail.jar

java 当数据库数据发生变化时自动发送邮件

1. java 的Timer类可以实现你的机制

2. spring的定时task也可以实现你的机制，不过也是间接调用java.util.Timer什么的。

3. 某个商品缺货，应该可以select语句获取改标记位，如果是，就定时发送。

4. 没有代码

java实现发送邮件功能

要实现邮件发送功能需要导入包：mail.jar

/*

* Generated by MyEclipse Struts

* Template path: templates/java/JavaClass.vtl

*/

package org.demo.action;

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.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;

import org.apache.struts.action.ActionForm;

import org.apache.struts.action.ActionForward;

import org.apache.struts.action.ActionMapping;

import org.demo.form.DemoForm;

public class DemoAction extends Action {

private static final String CONTENT_TYPE = "test/html;charset=GB2312";

public ActionForward execute(ActionMapping mapping, ActionForm form,

HttpServletRequest request, HttpServletResponse response) {

DemoForm demoForm = (DemoForm) form;

System.out.println("标题是" + demoForm.getBiaoti());

System.out.println("内容是" + demoForm.getNeirong());

try {

response.setContentType(CONTENT_TYPE);

String smtphost = "smtp.nj.headware点吸烟 "; // 发送邮件服务器

String user = "q0000015369"; // 邮件服务器登录用户名

String password = "Queshuwen26"; // 邮件服务器登录密码

String from = "q0000015369@nj.headware点吸烟 "; //

String to = "c0000016205@nj.headware点吸烟 "; // 收件人邮件地址

String subject = demoForm.getBiaoti(); // 邮件标题

String body = demoForm.getNeirong(); // 邮件内容

Properties props = new Properties();

props.put("mail.smtp.host", smtphost);

props.put("mail.smtp.auth", "true");

Session ssn = Session.getInstance(props, null);

MimeMessage message = new MimeMessage(ssn);

InternetAddress fromAddress = new InternetAddress(from);

message.setFrom(fromAddress);

InternetAddress toAddress = new InternetAddress(to);

message.addRecipient(Message.RecipientType.TO, toAddress);

message.setSubject(subject);

message.setText(body);

Transport transport = ssn.getTransport("smtp");

transport.connect(smtphost, user, password);

transport.sendMessage(message, message

.getRecipients(Message.RecipientType.TO));

// transport.send(message);

transport.close();

return mapping.findForward("succ");

} catch (Exception e) {

e.printStackTrace();

return mapping.findForward("fail");

}

}

}

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