发送邮件
一、添加maven依赖：
<dependency>
<groupId>com.sun.mail</groupId>
<artifactId>javax.mail</artifactId>
<version>1.6.0</version>
</dependency>
二、email工具类
import com.jfinal.log.Log;
import com.sun.xml.internal.messaging.saaj.packaging.mime.MessagingException;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import java.io.File;
import java.util.Date;
import java.util.Properties;
public class EmailUtil {
private static final Log log = Log.getLog(EmailUtil.class);
protected Session session;
/**
* 获取系统环境
*/
public static Properties getEmailProperties() {
Properties prop = new Properties();
return prop;
}
/**
* 初始化 SMTP 服务
* @param prop
* @param host 发件人的邮箱的 SMTP 服务器地址
* @param port 端口
* @param ssl 是否使用SSL
* @return
*/
public static Properties initSMTP(Properties prop, String host, int port, boolean ssl) {
prop.setProperty("mail.smtp.host", host);
prop.setProperty("mail.smtp.auth", "true");
prop.setProperty("mail.smtp.port", String.valueOf(port));
prop.setProperty("mail.smtp.ssl.enable", ssl ? "true" : "false");
if (ssl) {
prop.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
prop.setProperty("mail.smtp.socketFactory.fallback", "false");
}
return prop;
}
/**
* 企业邮箱服务器
* @param prop
* @return
*/
public static Properties setSMTP_qq(Properties prop) {
return initSMTP(prop, "smtp.exmail.qq.com", 465, true);
}
/**
*
* @param prop
* @param host
* @return prop
* @throws MessagingException
*/
public static Properties setSMTP_sel(Properties prop, String host) throws MessagingException {
if (host.contains("126.com") || host.equals("163.com")) { // 网易
return initSMTP(prop, "smtp.126.com", 25, true);
} else if (host.contains("sina.com")) { // 新浪
return initSMTP(prop, "smtp.sina.com", 25, true);
} else if (host.contains("qq.com")) { // 新浪
return initSMTP(prop, "smtp.qq.com", 465, true);
} else {
throw new MessagingException("not support for host[" + host + "]");
}
}
/**
* 初始化session
* @param prop
* @return
*/
public Session initSession(Properties prop){
Session session = Session.getInstance(prop);
// 在控制台显示Debug信息
session.setDebug(true);
this.session = session;
return session;
}
/**
* 创建一封邮箱
* @param session
* @param subject
* @param content
* @param sendMail
* @param sendPersonName
* @param receiveMail
* @param receivePersonName
* @return message
* @throws Exception
*/
public static MimeMessage createMimeMessage(Session session, String subject, String content, String sendMail, String sendPersonName, String receiveMail, String receivePersonName) throws Exception {
MimeMessage message = new MimeMessage(session);
// From: 发件人
message.setFrom(new InternetAddress(sendMail, sendPersonName, "UTF-8"));
// To: 收件人
message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(receiveMail, receivePersonName, "UTF-8"));
// Subject: 邮件主题
message.setSubject(subject, "UTF-8");
// Content: 邮件正文
message.setContent(content, "text/html;charset=UTF-8");
// 设置发件时间
message.setSentDate(new Date());
// 保存设置
message.saveChanges();
return message;
}
/**
* 创建一封邮箱带多附件
* @param session
* @param subject
* @param content
* @param sendMail
* @param sendPersonName
* @param receiveMail
* @param receivePersonName
* @return message
* @throws Exception
*/
public static MimeMessage createMimeMessage2(Session session, String subject, String content, String sendMail, String sendPersonName, String receiveMail, String receivePersonName, File ...file) throws Exception {
MimeMessage message = new MimeMessage(session);
// From: 发件人
message.setFrom(new InternetAddress(sendMail, sendPersonName, "UTF-8"));
// To: 收件人
message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(receiveMail, receivePersonName, "UTF-8"));
// Subject: 邮件主题
message.setSubject(subject, "UTF-8");
//添加附件+正文
MimeBodyPart body0 = new MimeBodyPart();
body0.setContent(content, "text/html;charset=UTF-8");
MimeMultipart mmPart = new MimeMultipart();
mmPart.addBodyPart(body0);
for (int i = 0; i < file.length; i++){
MimeBodyPart body = new MimeBodyPart();
body.setDataHandler(new DataHandler(new FileDataSource(file[i])));
body.setFileName(MimeUtility.encodeText(file[i].getName()));
mmPart.addBodyPart(body);
}
message.setContent(mmPart);
// 设置发件时间
message.setSentDate(new Date());
// 保存设置
message.saveChanges();
return message;
}
/**
* 发送邮件
* @param message
* @param sendAccount
* @param sendPassword
* @return
*/
public boolean send(MimeMessage message, String sendAccount, String sendPassword) {
try{
Transport transport = session.getTransport();
transport.connect(sendAccount, sendPassword);
log.info("开始发送邮件····");
transport.sendMessage(message, message.getAllRecipients());
transport.close();
log.info("邮件发送成功！");
return true;
} catch (NoSuchProviderException e) {
log.error("邮件发送失败！"+ e);
e.printStackTrace();
} catch (javax.mail.MessagingException e) {
log.error("邮件发送失败！"+ e);
e.printStackTrace();
}
return false;
}
public static void main(String[] args) throws Exception {
/**
* qq邮箱发送模板
*/
EmailUtil emailUtil=new EmailUtil();
Properties properties = EmailUtil.getEmailProperties();
properties = EmailUtil.setSMTP_sel(properties, "qq.com");
MimeMessage message = EmailUtil.createMimeMessage(emailUtil.initSession(properties), "这是主题", "这是内容", "***@qq.com（发件人）", "发件人姓名","***********@qq.com", "收件人姓名");
boolean flag = emailUtil.send(message, "***@qq.com（发件人）", "这里输入密码（发件人密码），qq邮箱则是授权码");
if (flag){
log.info("邮件发送成功！");
}else{
log.error("邮件发送失败！");
}}
注意：1. 若是发送qq邮箱：输入的密码不是qq密码，是授权码。如何获取授权码：需要进入qq邮箱，开启pop3/smtp服务。
（登录qq邮箱-->设置-->账户：里面有开启pop3/smtp服务，点击开启后即可获取授权码）2.如果邮件发送错误，一定要看它所返回的错误消息，很有用。如果返回url链接，记得点进去看，是什么错误模板引擎：
一、 添加依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>二、 添加模板
在resource目录下添加--->templates---->mail.htmlmail.html内容如下：
<html>
<body>
<div>
<p>这是邮件模板： ${userName}</p>
</div>
</body>
</html>三、获取邮件模板
/**
* 绑定邮件模板
* @param userName
* @return
* @throws IOException
* @throws TemplateException
*/
private String getEmailTemplate(String userName) throws IOException, TemplateException {
Template template = null;
Map<String, Object> model = new HashMap<>();
model.put("userName", userName);
template = freeMarkerConfigurer.getConfiguration().getTemplate("mail.html");
String html = FreeMarkerTemplateUtils.processTemplateIntoString(template, model);
return html;
}四、 发送邮件模板
将该处获取到的邮件模板html，作为邮件内容content发送即可
