后台自动发送邮件的程序（java mail，web版）①

web.xml文件：


<?xml version="1.0" encoding="UTF-8"?>


<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">


<web-app>


<servlet>


<servlet-name>mailsenderservlet</servlet-name><!--邮件发送程序-->


<servlet-class>com.email.MailSenderServlet</servlet-class>


<init-param>


<param-name>server</param-name><!--邮件服务器SMTP地址-->


<param-value>smtp.163.com</param-value>


</init-param>


<init-param>


<param-name>port</param-name><!--邮件服务器SMTP端口-->


<param-value>25</param-value>


</init-param>


<init-param>


<param-name>address</param-name><!--邮件地址-->


<param-value>username@163.com</param-value>


</init-param>


<init-param>


<param-name>username</param-name><!--邮件账号-->


<param-value>username</param-value>


</init-param>


<init-param>


<param-name>password</param-name><!--密码-->


<param-value>******</param-value>


</init-param>


<init-param>


<param-name>validate</param-name><!--SMTP服务器是否要求验证-->


<param-value>true</param-value>


</init-param>


<init-param>


<param-name>time</param-name><!--扫描数据库时间间隔（分钟）-->


<param-value>5</param-value>


</init-param>


<load-on-startup>1</load-on-startup>


</servlet>


</web-app>

servlet：


package com.email;




import javax.servlet.*;


import javax.servlet.http.*;


import java.io.*;




public class MailSenderServlet




extends HttpServlet ...{


private MailSender sender;


private Thread t;






public void init() throws ServletException ...{


sender = new MailSender();


sender.setRoot(root);


String server = getInitParameter("server");


String port = getInitParameter("port");


String address = getInitParameter("address");


String username = getInitParameter("username");


String password = getInitParameter("password");


if (server == null || port == null || address == null || username == null ||




password == null) ...{


System.out.println("系统文件web.xml错误：邮件发送程序初始化失败！");


return;


}


sender.setServer(server);


sender.setPort(port);


sender.setAddress(address);


sender.setUsername(username);


sender.setPassword(password);




String time = getInitParameter("time");




if (time != null) ...{


sender.setTime(Integer.parseInt(time));


}


String validate = getInitParameter("validate");




if (validate != null) ...{


sender.setValidate(Boolean.valueOf(validate).booleanValue());


}


t = new Thread(sender);


t.start(); //启动邮件发送线程


}






public void destroy() ...{


sender.stop(); //停止邮件发送线程




try ...{


t.join(1000);




if (t.isAlive()) ...{


System.out.println("邮件发送线程未停止。");


}


}




catch (Exception e) ...{}


}




}