java實現後台自動發郵件功能
java後台自動發郵件功能怎樣實現呢?下面是小編帶來的解決方法,希望對您有所幫助!
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><!--郵件發送程序-->
<servlet-class>SenderServlet</servlet-class>
<init-param>
<param-name>server</param-name><!--郵件服務器SMTP地址-->
<param-value></param-value>
</init-param>
<init-param>
<param-name>port</param-name><!--郵件服務器SMTP端口-->
<param-value>25</param-value>
</init-param>
<init-param>
<param-name>address</param-name><!--郵件地址-->
</param-value>
</init-param>
<init-param>
<param-name>username</param-name><!--郵件賬號-->
<param-value>username</param-value>
</init-param>
<init-param>
<param-name>password</param-name><!--密碼-->
<param-value>******</param-value>
</init-param>
<init-param>
<param-name>validate</param-name><!--SMTP服務器是否要求驗證-->
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>time</param-name><!--掃描數據庫時間間隔(分鐘)-->
<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("系統文件錯誤:郵件發送程序初始化失敗!");
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(); //啟動郵件發送線程
}
public void destroy() {
(); //停止郵件發送線程
try {
(1000);
if (ive()) {
tln("郵件發送線程未停止。");
}
}
catch (Exception e) {}
}
}
郵件發送程序
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; //掃描數據庫時間間隔
private boolean flag = true; //停止線程標記
private String server = ""; //SMTP服務器地址
private String port = "25"; //SMTP服務器端口
private String address; //用於發送EMAIL的發送者地址
private String username; //發送者的用户名
private String password; //發送者的密碼
private boolean validate = true; //郵件服務器是否要求驗證
private File root = null; //WEB根目錄
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(); //保存前一次發送郵件的時間
while (flag) { //服務器停止時退出線程
long k = new Date()ime() - lastTime;
if (k < -1000) { //防止系統修改時間
lastTime = new Date()ime();
continue;
}
if (k > time) { //超過設定時間間隔開始發送郵件
sendData();
lastTime = new Date()ime();
}
try {
p(100);
}
catch (Exception e) {}
}
}
public void stop() {
flag = false;
}
/**
* 檢索數據庫,併發送郵件
*/
private void sendData() {
ResultSet rs=null;//讀取數據庫數據
try {
Session session = nstance(getProperties(), new Authentic());
while(flag) {//服務器停止時退出線程
String toAddress = null;//發送地址(從rs中得到)
String subject = null;//郵件主題
String content = null ;//郵件內容
String file[] = null;//所有附件(絕對路徑)
sendMail(session, toAddress, subject, content, file);//發送郵件
}
}
catch (Exception e) {
tStackTrace();
}
finally {
if(rs!=null){
try{
e();
}
catch(SQLException e){}
}
}
}
/**
* 發送郵件
* @param session 會話
* @param toAddress 目的`地址
* @param subject 郵件主題
* @param content 郵件內容(HTML)
* @param files 郵件附件
* @return 是否發送成功
*/
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); //發送地址
ecipient(, new InternetAddress(toAddress)); //接收地址
ubject(subject); //郵件主題
Multipart mp = new MimeMultipart();
BodyPart html = new MimeBodyPart();
ontent(content, "text/html; charset=GBK"); //郵件HTML內容
odyPart(html);
if (files != null && th > 0) { //郵件附件
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); //郵件全部內容
entDate(new Date()); //發送時間
(rs); //發送
return true;
}
catch (Exception e) {
tStackTrace();
return false;
}
}
/**
* 郵件會話屬性
* @return 會話屬性
*/
private Properties getProperties() {
Properties rs = new Properties();
("", server);
("", port);
("", validate ? "true" : "false");
return rs;
}
public void setRoot(File root) {
= root;
}
class Authentic
extends Authenticator { //驗證密碼
public Authentic() {
}
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
}
}
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