在 Java 中使用 MIME 的自定义邮件标头
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Custom mail headers using MIME in Java
提问by ganga
I want to create a new custom header while sending email, but by using setHeader()and addHeader()methods I am unable to do it.
我想在发送电子邮件时创建一个新的自定义标题，但通过使用setHeader()和addHeader()方法我无法做到。
How can I create a user defined X-""email header?
如何创建用户定义的X-""电子邮件标头？
回答by swemon
setHeader() works for me. In below case, I set encoding options to mail header.
setHeader() 对我有用。在下面的情况下，我将编码选项设置为邮件标题。
String mail_body = "<html><head></head><body><h1>Mail Body</h1><b>This is mail body of Test mail.</b></body></html>";
String encodingOptions = "text/html; charset=UTF-8";
MimeMessage message = new MimeMessage(session);
message.setContent("Hello", "text/plain");
message.setSubject(mail_subject);
message.setText(mail_body);
message.setHeader("Content-Type", encodingOptions);
message.setSentDate(new Date());
You can see message header in receiving email with https://support.google.com/mail/bin/answer.py?hl=en&answer=22454
您可以通过https://support.google.com/mail/bin/answer.py?hl=zh-CN&answer=22454在接收电子邮件时看到邮件标题
Sample program. Mail.java
示例程序。邮件.java
package com.test.mail;
import java.util.Date;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.SendFailedException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
public class Mail {
private String host = "smtp.gmail.com";
private String mail_to = "[email protected]";
private String mail_from = "[email protected]";// using gmail server
private String mail_subject = "Subject of this test mail";
private String mail_body = "<html><head></head><body><h1>Mail Body</h1><b>This is mail body of Test mail.</b></body></html>";
private String personalName = "xxx";
private String encodingOptions = "text/html; charset=UTF-8";
public void sendMail() throws SendFailedException {
try {
Properties props = new Properties();
Authenticator auth = new Email_Autherticator();
//props.put("mail.smtp.host", host);
props.put("mail.smtp.host", host);
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "587");
System.out.println(props);
Session session = Session.getDefaultInstance(props, auth);
MimeMessage message = new MimeMessage(session);
message.setContent("Hello", "text/plain");
message.setSubject(mail_subject);
message.setText(mail_body);
message.setHeader("Content-Type", encodingOptions);
//message.setHeader(mail_head_name, mail_head_value);
message.setSentDate(new Date());
Address address = new InternetAddress(mail_from, personalName);
message.setFrom(address);
Address toaddress = new InternetAddress(mail_to);
message.addRecipient(Message.RecipientType.TO, toaddress);
System.out.println(message);
Transport.send(message);
System.out.println("Send Mail Ok!");
} catch (Exception e) {
e.printStackTrace();
}
// return flag;
}
public static void main(String args[]) {
try {
Mail mailObj = new Mail();
mailObj.sendMail();
} catch (Exception e) {
}
}
}
Email_Autherticator.java
Email_Autherticator.java
package com.test.mail;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
public class Email_Autherticator extends Authenticator {
String username = "[email protected]";
String password = "password";
public Email_Autherticator() {
super();
}
public Email_Autherticator(String user, String pwd) {
super();
username = user;
password = pwd;
}
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
}
