java实现后台自动发邮件功能
java后台自动发邮件功能怎样实现呢?下面是小编带来的解决方法,希望对您有所帮助!
文件
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "_2_">
<web-app>
<servlet>
<servlet-name>mailsenderservlet</servlet-name><!--邮件发送程序-->
<servlet-class>SenderServlet</servlet-class>
<init-param>
<param-name>server</param-name><!--邮件服务器SMTP地址-->
<param-value></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>
</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 l;
import let.*;
import .*;
import .*;
public class MailSenderServlet
extends HttpServlet {
private MailSender sender;
private Thread t;
public void init() throws ServletException {
sender = new MailSender();
oot(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) {
tln("系统文件错误:邮件发送程序初始化失败!");
return;
}
erver(server);
ort(port);
ddress(address);
sername(username);
assword(password);
String time = getInitParameter("time");
if (time != null) {
ime(eInt(time));
}
String validate = getInitParameter("validate");
if (validate != null) {
alidate(eOf(validate)eanValue());
}
t = new Thread(sender);
t(); //启动邮件发送线程
}
public void destroy() {
(); //停止邮件发送线程
try {
(1000);
if (ive()) {
tln("邮件发送线程未停止。");
}
}
catch (Exception e) {}
}
}
邮件发送程序
package l;
import .*;
import .*;
import .*;
import ;
import vation.*;
import .*;
import age.*;
import rnet.*;
/**
* <p>Copyright: Copyright (c) 2004</p>
* @author
* @version 1.0
*/
public class MailSender
implements Runnable {
private int time = 5 * 60 * 1000; //扫描数据库时间间隔
private boolean flag = true; //停止线程标记
private String server = ""; //SMTP服务器地址
private String port = "25"; //SMTP服务器端口
private String address; //用于发送EMAIL的发送者地址
private String username; //发送者的用户名
private String password; //发送者的密码
private boolean validate = true; //邮件服务器是否要求验证
private File root = null; //WEB根目录
MailConfigManager manager = nstance();
public MailSender() {
}
public void setAddress(String address) {
ess = address;
}
public void setPassword(String password) {
word = password;
}
public void setPort(String port) {
if (port != null && th() > 0) {
= port;
}
}
public void setServer(String server) {
er = server;
}
public void setUsername(String username) {
name = username;
}
public void setValidate(boolean validate) {
date = validate;
}
public void setTime(int minute) {
= minute * 60 * 1000;
}
public void run() {
long lastTime = new Date()ime(); //保存前一次发送邮件的时间
while (flag) { //服务器停止时退出线程
long k = new Date()ime() - lastTime;
if (k < -1000) { //防止系统修改时间
lastTime = new Date()ime();
continue;
}
if (k > time) { //超过设定时间间隔开始发送邮件
sendData();
lastTime = new Date()ime();
}
try {
p(100);
}
catch (Exception e) {}
}
}
public void stop() {
flag = false;
}
/**
* 检索数据库,并发送邮件
*/
private void sendData() {
ResultSet rs=null;//读取数据库数据
try {
Session session = nstance(getProperties(), new Authentic());
while(flag) {//服务器停止时退出线程
String toAddress = null;//发送地址(从rs中得到)
String subject = null;//邮件主题
String content = null ;//邮件内容
String file[] = null;//所有附件(绝对路径)
sendMail(session, toAddress, subject, content, file);//发送邮件
}
}
catch (Exception e) {
tStackTrace();
}
finally {
if(rs!=null){
try{
e();
}
catch(SQLException e){}
}
}
}
/**
* 发送邮件
* @param session 会话
* @param toAddress 目的`地址
* @param subject 邮件主题
* @param content 邮件内容(HTML)
* @param files 邮件附件
* @return 是否发送成功
*/
private boolean sendMail(Session session, String toAddress, String subject,
String content, String[] files) {
toAddress = ";
try {
Message rs = new MimeMessage(session);
Address from = new InternetAddress(address);
rom(from); //发送地址
ecipient(, new InternetAddress(toAddress)); //接收地址
ubject(subject); //邮件主题
Multipart mp = new MimeMultipart();
BodyPart html = new MimeBodyPart();
ontent(content, "text/html; charset=GBK"); //邮件HTML内容
odyPart(html);
if (files != null && th > 0) { //邮件附件
for (int i = 0; i < th; i++) {
MimeBodyPart mbp = new MimeBodyPart();
FileDataSource fds = new FileDataSource(files[i]);
ataHandler(new DataHandler(fds));
ileName(deWord(files[i]), "GBK", null));
odyPart(mbp);
}
}
ontent(mp); //邮件全部内容
entDate(new Date()); //发送时间
(rs); //发送
return true;
}
catch (Exception e) {
tStackTrace();
return false;
}
}
/**
* 邮件会话属性
* @return 会话属性
*/
private Properties getProperties() {
Properties rs = new Properties();
("", server);
("", port);
("", validate ? "true" : "false");
return rs;
}
public void setRoot(File root) {
= root;
}
class Authentic
extends Authenticator { //验证密码
public Authentic() {
}
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
}
}
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