我正在一个项目中,我需要从数据库中检索电子邮件地址,然后发送电子邮件给他们。我用arraylist检索了这些电子邮件地址。像这样:发送电子邮件至arraylist从数据库检索
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.List;
import javaapplication1.Person;
public class ABC {
public static void main(String[] args) throws SQLException {
ArrayList<Person> personlist = new ArrayList<Person>();
//List<Person> personlist = new List<Person>();
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection con=DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe","gsjsc","gsjschanna");
Statement st=con.createStatement();
ResultSet srs = st.executeQuery("SELECT * FROM person2");
while (srs.next()) {
Person person = new Person();
person.setName(srs.getString("name"));
person.setJobtitle(srs.getString("jobtitle"));
// person.setFrequentflyer(srs.getInt("frequentflyer"));
personlist.add(person);
}
System.out.println(personlist.size());
for (int a=0;a<personlist.size();a++)
{
System.out.println(personlist.get(a).getName());
System.out.println(personlist.get(a).getJobtitle());
// System.out.println(personlist.get(2).getName());
// System.out.println(personlist.get(3).getName());
}
//System.out.println(personlist.get(4));
//System.out.println(namelist.);
} catch (Exception e) {
System.err.println("Got an exception! ");
System.err.println(e.getMessage());
}
}
}
Person.java:包含所有的setter和getters。
编辑
现在我要发送电子邮件到对象人的ArrayList中检索这些电子邮件地址。 我有一个代码,像这样的数组列表中发送邮件给多个收件人:
package javaapplication1;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import java.util.Scanner;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
public class SendEmailToGroupDemo {
public static void main(String[] args) {
// Create a SendEmail object and call start
// method to send a mail in Java.
SendEmailToGroupDemo sendEmailToGroup = new SendEmailToGroupDemo();
sendEmailToGroup.start();
}
private void start() {
// For establishment of email client with
// Google's gmail use below properties.
// For TLS Connection use below properties
// Create a Properties object
Properties props = new Properties();
// these properties are required
// providing smtp auth property to true
props.put("mail.smtp.auth", "true");
// providing tls enability
props.put("mail.smtp.starttls.enable", "true");
// providing the smtp host i.e gmail.com
props.put("mail.smtp.host", "smtp.gmail.com");
// providing smtp port as 587
props.put("mail.smtp.port", "587");
// For SSL Connection use below properties
/*props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class",
"javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");*/
// Create Scanner object to take necessary
// values from the user.
Scanner scanner = new Scanner(System.in);
System.out.println("Please provide your Username for Authentication ...");
final String Username = scanner.next();
System.out.println("Please provide your Password for Authentication ...");
final String Password = scanner.next();
System.out.println("Please provide Email Address from which you want to send Email ...");
final String fromEmailAddress = scanner.next();
System.out.println("Please provide Email Addresses to which you want to send Email ...");
System.out.println("If you are done type : Done or done");
// ArrayLists to store email addresses entered by user
ArrayList< String> emails = (ArrayList<String>) getEmails();
System.out.println("Please provide Subject for your Email ... ");
final String subject = scanner.next();
System.out.println("Please provide Text Message for your Email ... ");
final String textMessage = scanner.next();
// Create a Session object based on the properties and
// Authenticator object
Session session = Session.getDefaultInstance(props,
new LoginAuthenticator(Username,Password));
try {
// Create a Message object using the session created above
Message message = new MimeMessage(session);
// setting email address to Message from where message is being sent
message.setFrom(new InternetAddress(fromEmailAddress));
// setting the email addressess to which user wants to send message
message.setRecipients(Message.RecipientType.BCC, getEmailsList(emails));
// setting the subject for the email
message.setSubject(subject);
// setting the text message which user wants to send to recipients
message.setText(textMessage);
// Using the Transport class send() method to send message
Transport.send(message);
System.out.println("\nYour Message delivered successfully ....");
} catch (MessagingException e) {
throw new RuntimeException(e);
}
}
// This method takes a list of email addresses and
// returns back an array of Address by looping the
// list one by one and storing it into Address[]
private Address[] getEmailsList(ArrayList<String> emails) {
Address[] emaiAddresses = new Address[emails.size()];
for (int i =0;i < emails.size();i++) {
try {
emaiAddresses[i] = new InternetAddress(emails.get(i));
}
catch (AddressException e) {
e.printStackTrace();
}
}
return emaiAddresses;
}
// This method prompts user for email group to which he
// wants to send message
public List<String> getEmails() {
ArrayList<String> emails = new ArrayList<String>();
int counter = 1;
String address = "";
Scanner scanner = new Scanner(System.in);
// looping inifinitely times as long as user enters
// emails one by one
// the while loop breaks when user types done and
// press enter.
while(true) {
System.out.println("Enter E-Mail : " + counter);
address = scanner.next();
if(address.equalsIgnoreCase("Done")){
break;
}
else {
emails.add(address);
counter++;
}
}
return emails;
}
}
// Creating a class for Username and Password authentication
// provided by the user.
class LoginAuthenticator extends Authenticator {
PasswordAuthentication authentication = null;
public LoginAuthenticator(String username, String password) {
authentication = new PasswordAuthentication(username,password);
}
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return authentication;
}
}
这是一个完全不同的代码。但是可以发送电子邮件给一群人。但问题是我们必须手动输入电子邮件地址。而我想将邮件发送到从ABC类检索的地址。有人可以给我一个集成的代码(对于这两个类),这将是伟大的。
*注意:请用完整的工作代码回答,截止日期接近。* - 大声笑,祝你好运 – Idos
你的问题和你的代码不匹配。在Person对象中设置的电子邮件在哪里?您的其他代码从控制台获取电子邮件列表,并且似乎没有与人员列表获取代码的任何连接。 –
'请用完整的工作代码回答,截止日期很近 - 我通常会编辑这类垃圾,但在您的情况下,我会将其保留,所以每个人都可以看到它。它的裸露的脸颊... [阅读此](http://meta.stackoverflow.com/q/326569/472495)。 – halfer