JavaMail发送多联系人多附件邮件

一.准备

1.需要的Jar包

activation1.1.jar
javax.mail.1.4.7.jar

Maven

<properties>
<javamail.version>1.4.7</javamail.version>
</properties>
...
...
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>${javamail.version}</version>
</dependency>

手动找吧~

二.代码

1.工具类

package com.xxxx.xxxx.util;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;

/**
* NAME   :  EmailSystem/com.amayadream.emailsystem.util
* Author :  Amayadream
* Date   :  2015.12.04 14:00
* TODO   :  邮件发送工具类
*/
public class MailUtil {

// -- 验证要素 -- //
private String sendhost;    //邮件服务器
private String sendport;    //端口号
private String sendmail;    //发信邮箱
private String sendpass;    //发信密码

//-- 邮件内容 -- //
private String subject;     //邮件主题
private String sendname;    //发信昵称
private String content;     //邮件内容
private String[] receiver;  //收件人,类型为数组
private String[] cc;        //抄送,类型为数组
private String[] bcc;       //密送,类型为数组
private File[] files;       //附件,类型为数组

private MimeMessage message;
private Session session;
private Transport transport;

/**
* 初始化
*/
public void init(String sendhost, String sendport, String sendmail, String sendpass, String subject,
String sendname, String content, String[] receiver, String[] cc, String[] bcc, File[] files){
this.sendhost = sendhost;
this.sendport = sendport;
this.sendmail = sendmail;
this.sendpass = sendpass;
this.subject = subject;
this.sendname = sendname;
this.content = content;
this.receiver = receiver;
this.cc = cc;
this.bcc = bcc;
this.files = files;
}

/**
* 获取session对象
* @param debug     是否开启debug模式
* @return
*/
public Session getSession(boolean debug){
Properties properties = new Properties();
properties.put("mail.smtp.host",sendhost);
properties.put("mail.smtp.port",sendport);
properties.put("mail.sender.username",sendmail);
properties.put("mail.sender.password",sendpass);
session = Session.getInstance(properties);
session.setDebug(debug);// 开启后有调试信息
return session;
}

/**
* 设置发信的内容
* @param session
* @return
*/
public MimeMessage getMessage(){
message = new MimeMessage(session);
try {
// 邮件主题
message.setSubject(subject);
// 发信时间
message.setSentDate(new Date());
// 发件人
if(sendname != null){
InternetAddress from = new InternetAddress(sendmail, sendname);
message.setFrom(from);
}else{
InternetAddress from = new InternetAddress(sendmail);
message.setFrom(from);
}
// 收件人
InternetAddress[] to = new InternetAddress[receiver.length];
for (int i = 0; i < receiver.length; i++) {
to[i] = new InternetAddress(receiver[i]);
}
message.setRecipients(Message.RecipientType.TO, to);
if (cc != null) {
InternetAddress[] add_cc = new InternetAddress[cc.length];
for (int i = 0; i < cc.length; i++) {
add_cc[i] = new InternetAddress(cc[i]);
}
message.setRecipients(Message.RecipientType.CC, add_cc);
}
if (bcc != null) {
InternetAddress[] add_bcc = new InternetAddress[bcc.length];
for (int i = 0; i < bcc.length; i++) {
add_bcc[i] = new InternetAddress(bcc[i]);
}
message.setRecipients(Message.RecipientType.BCC, add_bcc);
}
// 向multipart对象中添加邮件的各个部分内容，包括文本内容和附件
Multipart multipart = new MimeMultipart();
// 添加邮件正文
BodyPart contentPart = new MimeBodyPart();
contentPart.setContent(content, "text/html;charset=UTF-8");
multipart.addBodyPart(contentPart);
if (files != null) {
for (int i = 0; i < files.length; i++) {
BodyPart attachmentBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(files[i]);
attachmentBodyPart.setDataHandler(new DataHandler(source));

//MimeUtility.encodeWord可以避免文件名乱码
attachmentBodyPart.setFileName(MimeUtility.encodeWord(files[i].getName()));
multipart.addBodyPart(attachmentBodyPart);
}
}
// 将multipart对象放到message中
message.setContent(multipart);
// 保存邮件
message.saveChanges();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (AddressException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
}
return message;
}

/**
* 发送邮件
* @param message
* @param session
* @return
*/
public String sendMail(boolean debug){
session = getSession(debug);
message = getMessage();
try {
transport = session.getTransport("smtp");
// smtp验证，就是你用来发邮件的邮箱用户名密码
transport.connect(sendhost, sendmail, sendpass);
transport.sendMessage(message, message.getAllRecipients());
return "success";
} catch (NoSuchProviderException e) {
e.printStackTrace();
return "providerError";
} catch (MessagingException e) {
e.printStackTrace();
return "messageError";//密码错误在这里触发,网络连接失败也在这里触发
} finally {
if (transport != null) {
try {
transport.close();
} catch (MessagingException e) {
e.printStackTrace();
}
}
}
}
}

2.使用方法

package com.amayadream.emailsystem.util;

import java.io.File;

/**
* NAME   :  EmailSystem/com.amayadream.emailsystem.util
* Author :  Amayadream
* Date   :  2015.12.04 17:25
* TODO   :
*/
public class SendEmail {
public static void main(String[] args) {
MailUtil mailUtil = new MailUtil();
File file = new File("C:\\Users\\Administrator\\Desktop\\QQ截图20151203152914.png");
File file2 = new File("C:\\Users\\Administrator\\Desktop\\QQ截图20151203152706.png");
File[] files = new File[] {file,file2};   //多附件
String[] sendto = {"AAA@qq.com","BBB@qq.com"};//收信人
String[] sendcc = {"CCC@gmail.com"};//抄送
String[] sendbcc = {"DDD@gmail.com"};//密送
String sendhost = "smtp.xx.com";     //邮件服务器
String sendport = "25";              //端口号
String sendmail = "xxx.xx.com";      //发信邮箱
String sendpass = "********";        //邮箱密码
String subject = "听说明天天气不错"; //邮件主题
String sendname = "宇宙大魔王";      //发信昵称
String content = "<h2>明天一起出来玩</h2>";    //邮件内容

//初始化赋值,其中最后三项(抄送.密送和附件是可选项,如果不需要则直接赋值为null即可)
mailUtil.init(sendhost,sendport,sendmail,sendpass,subject,sendname,content,sendto,sendcc,sendbcc,files);
//发送邮件,true为开启debug模式,如果不需要赋值为false即可
mailUtil.sendMail(true);
}
}