改寫版本二的內容
(尚未測試，ps筆者跑太多次，gmail被暫停使用)：
- 參考至這篇TLS加密並不是明文傳送。若要用密文傳送需要用SSL，且設定需要用SMTPS。
(若需測試使用，下面兩行註解拿掉)
// if (this.secureType == secureType.SSL)
// protocol = SMTPS;
- Properties 參數可以參考：Package com.sun.mail.smtp
EmailSender.java
class EmailSender{
String name;
String address;
EmailSender(){
name = "";
address = "";
}
}
EmailReceiver.java
public interface EmailReceiver {
String name();
String address();
}
Email.java
package option;
import java.text.DateFormat;
import java.util.Date;
import java.util.Properties;
import java.util.Vector;
import javax.mail.Address;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import option.GmailSetting.SecureType;
public class Email {
String subject;
String content;
SecureType secureType;
boolean valid;
String account;
String passowrd;
EmailSender emailSender;
Vector<EmailReceiver> emailReceivers;
static final String SMTP = "smtp";
static final String SMTPS = "smtps";
Email(SecureType secureType, boolean valid, String account, String password) {
subject = "";
content = "";
this.secureType = secureType;
this.valid = valid;
this.account = account;
this.passowrd = password;
emailSender = new EmailSender();
emailReceivers = new Vector<EmailReceiver>();
}
public void setSubject(String subject) {
this.subject = subject;
}
public void setContents(String content) {
this.content = content;
}
public void setSender(String name, String address) {
emailSender.name = name;
emailSender.address = address;
}
public void addReceiver(final String name, final String address) {
emailReceivers.add(new EmailReceiver() {
public String address() {
return address;
}
public String name() {
return name;
}
});
}
Properties generateRequireProp() {
String protocol = SMTP;
final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
String portNumber = GmailSetting.PORT_NUMBER.get(secureType.value()).toString();
//
// if (this.secureType == secureType.SSL)
// protocol = SMTPS;
// set up gmail information
Properties props = new Properties();
props.setProperty("mail." + protocol + ".host", "smtp.gmail.com");
props.setProperty("mail." + protocol + ".port", portNumber);
props.setProperty("mail.transport.protocol", protocol);
if (valid)
props.setProperty("mail" + protocol + ".smtp.auth", "true");
if (this.secureType != SecureType.None) {
if (this.secureType == secureType.TLS)
props.setProperty("mail." + protocol + ".smtp.starttls.enable", "true");
else {
props.setProperty("mail." + protocol + ".socketFactory.class", SSL_FACTORY);
props.setProperty("mail." + protocol + ".socketFactory.fallback", "false");
props.setProperty("mail." + protocol + ".socketFactory.port", portNumber);
props.setProperty("mail." + protocol + ".smtps.ssl.enable", "true");
}
}
return props;
}
boolean sendMail() {
try {
if (emailReceivers.isEmpty()) {
System.out.println("Email Receiver is empty.");
return false;
}
System.out.println("Start to send email");
int receiverAddressCount = emailReceivers.size();
Address[] mailAddress = new Address[receiverAddressCount];
for (int i = 0; i < receiverAddressCount; i++) {
mailAddress[i] = new InternetAddress(emailReceivers.get(i).address(), emailReceivers.get(i).name());
}
Address senderAddress = new InternetAddress(emailSender.address, emailSender.name);
Properties props = generateRequireProp();
// build the new session service
Session session = Session.getInstance(props, null);
Message message = new MimeMessage(session);
// build the mail of sender , receiver and subject info
message.setHeader("Content-Transfer-Encoding", "utf-8");
message.setFrom(senderAddress);
message.setRecipients(Message.RecipientType.TO, mailAddress);
message.setSubject(subject);
// set mime content
MimeMultipart multipart = new MimeMultipart();
MimeBodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setContent(content + "by " + secureType.value() + " connection.", "text/html;charset=utf-8");
multipart.addBodyPart(messageBodyPart);
message.setContent(multipart);
message.saveChanges();
String protocol = SMTP;
if (valid) {
Transport transport = session.getTransport();
if (this.secureType == secureType.SSL)
protocol = SMTPS;
transport = session.getTransport(protocol);
transport.connect("smtp.gmail.com", this.account, this.passowrd);
Transport.send(message, message.getAllRecipients());
transport.close();
} else {
Transport.send(message);
}
System.out.println("Done");
} catch (Exception e) {
// throw new RuntimeException(e);
e.printStackTrace();
}
return true;
}
public static void main(String args[]) {
final String senderAddr = "sender@gmail.com";
final String password = "sender password";
Email testEmail = new Email(SecureType.SSL, true, senderAddr, password);
testEmail.setSubject("Test mail " + DateFormat.getDateTimeInstance().format(new Date(System.currentTimeMillis())));
testEmail.setContents("This is a test e-mail by javamail library");
testEmail.addReceiver("Test123", "receiver@mail");
testEmail.setSender("SenderTest by Jorden", senderAddr);
if (testEmail.sendMail())
System.out.println("Success to send email!");
else
System.out.println("Error");
}
}
