Java 在特定时间发送电子邮件
我使用下面的代码发送电子邮件。只需创建一个对象并调用该对象的方法Java 在特定时间发送电子邮件,java,jakarta-mail,servletcontextlistener,Java,Jakarta Mail,Servletcontextlistener,我使用下面的代码发送电子邮件。只需创建一个对象并调用该对象的方法 package com.kap.globalreport; public class Mainmethod930 { public static void main(String[] args) { EmailReport930 emailReport930 = new EmailReport930(); emailReport930.sendEmail("emailContent","S
package com.kap.globalreport;
public class Mainmethod930 {
public static void main(String[] args) {
EmailReport930 emailReport930 = new EmailReport930();
emailReport930.sendEmail("emailContent","Subject");
}
}
上面我创建了对象并调用下面的sendmail方法
package com.kap.globalreport;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import java.util.Date;
import java.util.Properties;
public class EmailReport930 implements Runnable {
final private String SMTP_SERVER = "166.62.121.14";
final private String SMTP_PORT = "587";
final private String ROWEL_EMAIL = "dumidu@kapruka.com";
final private String FROM_EMAIL = "cargillspaymenterros@kapruka.com";
final private String FROM_EMAIL_PASSWORD = "cpay@55";
private String emailContent;
private String subject;
public String getEmailContent() {
return emailContent;
}
public void setEmailContent(String emailContent) {
this.emailContent = emailContent;
}
public String getSubject() {
return subject;
}
public void setSubject(String subject) {
this.subject = subject;
}
private void setEmail(String emailContent, String subject) {
if (emailContent != null && subject != null) {
sendEmail(emailContent, subject);
}
}
public void sendEmail(String emailContent, String subject) {
try {
Properties props = new Properties();
props.put("mail.transport.protocol", "smtp");
props.put("mail.smtp.host", SMTP_SERVER);
props.put("mail.smtp.port", SMTP_PORT);
props.put("mail.smtp.auth", "true");
Session mailSession = Session.getInstance(props, new Authenticator() {
@Override
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(FROM_EMAIL, FROM_EMAIL_PASSWORD);
}
});
mailSession.setDebug(true);
MimeMessage message = new MimeMessage(mailSession);
message.setFrom(new InternetAddress(FROM_EMAIL));
message.addHeader("site", "kapruka.com");
message.addHeader("service", "Cargills Payment Service");
message.setSentDate(new Date());
message.addRecipient(Message.RecipientType.TO, new InternetAddress(ROWEL_EMAIL));
message.setSubject(subject);
MimeMultipart mimeMultipart = new MimeMultipart();
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setContent(emailContent, "text/html; charset=utf-8");
messageBodyPart.setContent("<h1>SMTP_PORT</h1>", "text/html");
mimeMultipart.addBodyPart(messageBodyPart);
message.setContent(mimeMultipart);
Transport.send(message);
System.out.println("Email Sent successfully....");
} catch (MessagingException mex) {
mex.printStackTrace();
}
}
@Override
public void run() {
setEmail(emailContent, subject);
}
}
package com.kap.globalreport;
导入javax.mail.*;
导入javax.mail.internet.InternetAddress;
导入javax.mail.internet.MimeBodyPart;
导入javax.mail.internet.mimessage;
导入javax.mail.internet.MimeMultipart;
导入java.util.Date;
导入java.util.Properties;
公共类EmailReport930实现可运行{
最终私有字符串SMTP_SERVER=“166.62.121.14”;
最终专用字符串SMTP_PORT=“587”;
最后一个私人字符串ROWEL_EMAIL=”dumidu@kapruka.com";
来自_电子邮件的最终私人字符串=”cargillspaymenterros@kapruka.com";
电子邮件中的最终私人字符串\u密码=”cpay@55";
私有字符串内容;
私有字符串主题;
公共字符串getEmailContent(){
返回电子邮件内容;
}
public void setEmailContent(字符串emailContent){
this.emailContent=emailContent;
}
公共字符串getSubject(){
返回主题;
}
public void setSubject(字符串主题){
this.subject=主语;
}
私有void setEmail(字符串emailContent,字符串subject){
if(emailContent!=null&&subject!=null){
发送电子邮件(电子邮件内容、主题);
}
}
public void sendmail(字符串emailContent,字符串subject){
试一试{
Properties props=新属性();
props.put(“mail.transport.protocol”、“smtp”);
props.put(“mail.smtp.host”,smtp_服务器);
props.put(“mail.smtp.port”,smtp\u端口);
props.put(“mail.smtp.auth”,“true”);
Session mailSession=Session.getInstance(props,new Authenticator(){
@凌驾
公共密码身份验证getPasswordAuthentication(){
返回新密码身份验证(从\u电子邮件,从\u电子邮件\u密码);
}
});
mailSession.setDebug(true);
mimessage message=新mimessage(mailSession);
message.setFrom(新的Internet地址(来自电子邮件));
message.addHeader(“site”,“kapruka.com”);
message.addHeader(“服务”、“嘉吉支付服务”);
message.setSentDate(新日期());
message.addRecipient(message.RecipientType.TO,新的Internet地址(ROWEL_电子邮件));
message.setSubject(主题);
MimeMultipart MimeMultipart=新的MimeMultipart();
BodyPart messageBodyPart=新的MimeBodyPart();
setContent(emailContent,“text/html;charset=utf-8”);
setContent(“SMTP_端口”,“text/html”);
mimeMultipart.addBodyPart(messageBodyPart);
message.setContent(mimeMultipart);
传输。发送(消息);
System.out.println(“电子邮件发送成功…”);
}捕获(消息例外mex){
mex.printStackTrace();
}
}
@凌驾
公开募捐{
设置电子邮件(电子邮件内容、主题);
}
}
我想在特定时间运行这个发送电子邮件的方法。我还想使用hibernate框架从数据库中获取数据。应发送包含上述数据的电子邮件 通常有四种不同的方式定期运行任务:
timer
和ScheduledExecutorService
作为:
public class PeriodicTask {
public static void main(String... args) {
// System.out.println(LocalTime.ofSecondOfDay(getDelayTo(15, 4)));
// System.out.println(LocalTime.ofSecondOfDay(getDelayTo(16, 4)));
testTimer();
testScheduledExecutorService();
}
private static long getDelayTo(int hour, int minute) {
LocalDateTime currentTime = LocalDateTime.now();
long gapToSpecified = ChronoUnit.SECONDS.between(currentTime, LocalDate.now().atTime(hour, minute));
if (gapToSpecified < 0) { // the time already passed => do it tomorrow;
return ChronoUnit.SECONDS.between(currentTime, LocalDate.now().plusDays(1).atTime(hour, minute));
}
return gapToSpecified; // not passed, do it later today at the specified time;
}
public static void testTimer() {
new Timer().schedule(new TimerTask() {
@Override
public void run() {
System.out.println(LocalDateTime.now());
System.out.println("Hello world");
}
}, getDelayTo(13, 0), TimeUnit.DAYS.toSeconds(1));
}
public static void testScheduledExecutorService() {
Executors.newScheduledThreadPool(1).scheduleWithFixedDelay(() -> {
System.out.println("Hello World!");
}, getDelayTo(13, 0), TimeUnit.DAYS.toSeconds(1), TimeUnit.SECONDS);
}
}
公共类周期任务{
公共静态void main(字符串…参数){
//System.out.println(secondofday的LocalTime.of(getDelayTo(15,4));
//System.out.println(secondofday的LocalTime.of(getDelayTo(16,4));
testTimer();
testScheduledExecutorService();
}
专用静态长getDelayTo(整数小时,整数分钟){
LocalDateTime currentTime=LocalDateTime.now();
long gapToSpecified=ChronoUnit.SECONDS.between(currentTime,LocalDate.now().atTime(小时,分钟));
如果(gaptospected<0){//时间已经过去=>明天再做;
返回ChronoUnit.SECONDS.between(currentTime,LocalDate.now().plusDays(1).atTime(小时,分钟));
}
return gapToSpecified;//未通过,今天晚些时候在指定时间执行;
}
公共静态void testTimer(){
新建计时器()。计划(新建计时器任务()){
@凌驾
公开募捐{
System.out.println(LocalDateTime.now());
System.out.println(“你好世界”);
}
},getDelayTo(13,0),TimeUnit.DAYS.toSeconds(1));
}
公共静态void testScheduledExecutorService(){
Executors.newScheduledThreadPool(1).scheduleWithFixedDelay(()->{
System.out.println(“你好,世界!”);
},getDelayTo(13,0),TimeUnit.DAYS.toSeconds(1),TimeUnit.SECONDS);
}
}
使用java.util.Timer
并安排您的工作
Timer.schedule(TimerTask任务、首次日期、长周期)
~~
使用Spring之类的框架?如果是的话,
@Scheduled(…)
怎么样?这里有一个开始:你所说的特定时间是什么意思?你想每天下午1:00发送电子邮件吗?@Hearen Spring framework在这里不使用。@RoshanaPitigala是的,我想每天下午1:00发送电子邮件使用quartz来实现这一点?
Calendar c = Calendar.getInstance();
c.set(Calendar.HOUR_OF_DAY, 13);
c.set(Calendar.MINUTE, 00);
c.set(Calendar.SECOND, 00);
Timer timer = new Timer();
timer.schedule(new TimerTask() {
@Override
public void run() {
//Call your method here
//setEmail(emailContent, subject);
}
}, c.getTime(), 86400000);
//24hrs == 86400000ms