Java Mail邮件发送的简单实现

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;public class MyEmailAutherticator extends Authenticator { //用户名（登录邮箱）
private String username; //密码
private String password; public MyEmailAutherticator() {
super();
} //初始化邮箱和密码
public MyEmailAutherticator(String username, String password) {
this.username = username;
this.password = password;
} //用作登录校验，以确保对该邮箱有发送邮件的权利
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
} //set and get method
public String getUsername() {
return username;
} public void setUsername(String username) {
this.username = username;
} public String getPassword() {
return password;
} public void setPassword(String password) {
this.password = password;
}
}

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 { //发送邮件的帐号和密码
private String username="abc123456@qq.com"; private String password="xxxxxx"; private String host = "smtp.qq.com"; private String mail_head_name = "this is head of this mail"; private String mail_head_value = "this is head of this mail"; private String mail_to = "123456789@qq.com"; private String mail_from = "abc123456@qq.com"; private String mail_subject = "this is the subject of this test mail"; private String mail_body = "this is mail_body of this test mail"; private String personalName = "我的邮件"; public void sendMail() throws SendFailedException{
try {
//发送邮件的props文件
Properties props = new Properties();
// 初始化props
props.put("mail.smtp.host", host);
props.put("mail.smtp.auth", "true");
System.out.println(props); //进行邮件服务用户认证
Authenticator auth = new MyEmailAutherticator(username,password); // 创建session,和邮件服务器进行通讯
Session session = Session.getDefaultInstance(props,auth); // 创建mime类型邮件
MimeMessage message = new MimeMessage(session);
//设置邮件格式
message.setContent("Hello","text/html;charset=utf-8");
// 设置主题
message.setSubject(mail_subject);
//设置邮件内容
message.setText(mail_body);
//设置邮件标题
message.setHeader(mail_head_name, mail_head_value);
message.setSentDate(new Date());//设置邮件发送时期
Address address = new InternetAddress(mail_from,personalName);
//设置邮件发送者的地址
message.setFrom(address); //======单发邮件======
//设置邮件接收者的地址
Address toaddress = new InternetAddress(mail_to);
// 设置收件人
message.addRecipient(Message.RecipientType.TO,toaddress); //======群发邮件======
// List<String> recipients = new ArrayList<String>();
// recipients.add("123456789@qq.com");
// recipients.add("234567890@gmail.com");
// final int num = recipients.size();
// InternetAddress[] addresses = new InternetAddress[num];
// for (int i = 0; i < num; i++) {
// addresses[i] = new InternetAddress(recipients.get(i));
// }
// message.setRecipients(Message.RecipientType.TO, addresses); System.out.println(message);
// 发送邮件
Transport.send(message);
System.out.println("Send Mail Ok!");
} catch (Exception e) {
e.printStackTrace();
}
}
}

public class Test { public static void main(String[] args) {
Mail m = new Mail();
try {
m.sendMail();
} catch (Exception e) { }
}
}

public class Demo1 {
@Test
public void fun1() throws Exception {
/*
* 1. 得到session
*/
Properties props = new Properties();
props.setProperty("mail.host", "smtp.163.com");
props.setProperty("mail.smtp.auth", "true"); Authenticator auth = new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("itcast_cxf", "itcast");
}
}; Session session = Session.getInstance(props, auth); /*
* 2. 创建MimeMessage
*/
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress("itcast_cxf@163.com"));//设置发件人
msg.setRecipients(RecipientType.TO, "itcast_cxf@126.com");//设置收件人
msg.setRecipients(RecipientType.CC, "itcast_cxf@sohu.com");//设置抄送
msg.setRecipients(RecipientType.BCC, "itcast_cxf@sina.com");//设置暗送 msg.setSubject("这是来自ITCAST的测试邮件");
msg.setContent("这就是一封垃圾邮件！", "text/html;charset=utf-8"); /*
* 3. 发
*/
Transport.send(msg);
} /**
* 带有附件的邮件！！！
*/
@Test
public void fun2() throws Exception {
/*
* 1. 得到session
*/
Properties props = new Properties();
props.setProperty("mail.host", "smtp.163.com");
props.setProperty("mail.smtp.auth", "true"); Authenticator auth = new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("itcast_cxf", "itcast");
}
}; Session session = Session.getInstance(props, auth); /*
* 2. 创建MimeMessage
*/
MimeMessage msg = new MimeMessage(session);
msg.setFrom(new InternetAddress("itcast_cxf@163.com"));//设置发件人
msg.setRecipients(RecipientType.TO, "itcast_cxf@126.com");//设置收件人 msg.setSubject("这是来自ITCAST的测试邮件有附件"); ////////////////////////////////////////////////////////
/*
* 当发送包含附件的邮件时，邮件体就为多部件形式！
* 1. 创建一个多部件的部件内容！MimeMultipart
* MimeMultipart就是一个集合，用来装载多个主体部件！
* 2. 我们需要创建两个主体部件，一个是文本内容的，另一个是附件的。
* 主体部件叫MimeBodyPart
* 3. 把MimeMultipart设置给MimeMessage的内容！
*/
MimeMultipart list = new MimeMultipart();//创建多部分内容 // 创建MimeBodyPart
MimeBodyPart part1 = new MimeBodyPart();
// 设置主体部件的内容
part1.setContent("这是一封包含附件的垃圾邮件", "text/html;charset=utf-8");
// 把主体部件添加到集合中
list.addBodyPart(part1); // 创建MimeBodyPart
MimeBodyPart part2 = new MimeBodyPart();
part2.attachFile(new File("F:/f/白冰.jpg"));//设置附件的内容
part2.setFileName(MimeUtility.encodeText("大美女.jpg"));//设置显示的文件名称，其中encodeText用来处理中文乱码问题
list.addBodyPart(part2); msg.setContent(list);//把它设置给邮件作为邮件的内容。 //////////////////////////////////////////////////////// /*
* 3. 发
*/
Transport.send(msg);
}}