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1,导入 jar 包:
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4</version>
</dependency>
2,工具类:
package com.cx.item.common.utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Properties;
public class EmailUtil {
private static final Logger logger = LoggerFactory.getLogger(EmailUtil.class);
private static String defaultSenderEmail = "";// 默认的发件人用户名,defaultEntity用得到
private static String defaultSenderPass = "";// 默认的发件人密码,defaultEntity用得到
private static String defaultSmtpHost = "";// 默认的邮件服务器地址,defaultEntity用得到
private String smtpHost; // 邮件服务器地址
private String sendUserEmail; // 发件人的用户名
private String sendUserPass; // 发件人密码
private MimeMessage mimeMsg; // 邮件对象
private Session session;
private Properties props;
private Multipart mp;// 附件添加的组件
private List<FileDataSource> files = new LinkedList<FileDataSource>();// 存放附件文件
private void init() {
if (props == null) {
props = System.getProperties();
}
props.put("mail.smtp.host", smtpHost);
props.put("mail.smtp.auth", "true"); // 需要身份验证
session = Session.getDefaultInstance(props, null);
// 置true可以在控制台(console)上看到发送邮件的过程
session.setDebug(true);
// 用session对象来创建并初始化邮件对象
mimeMsg = new MimeMessage(session);
// 生成附件组件的实例
mp = new MimeMultipart();
}
private EmailUtil(String smtpHost, String sendUserEmail, String sendUserPass, String to, String cc, String mailSubject, String mailBody,
List<String> attachments) {
this.smtpHost = smtpHost;
this.sendUserEmail = sendUserEmail;
this.sendUserPass = sendUserPass;
init();
setFrom(sendUserEmail);
setTo(to);
setCC(cc);
setBody(mailBody);
setSubject(mailSubject);
if (attachments != null) {
for (String attachment : attachments) {
addFileAffix(attachment);
}
}
}
/**
* 邮件实体
*
* @param smtpHost 邮件服务器地址
* @param sendUserEmail 发件邮件地址
* @param sendUserPass 发件邮箱密码
* @param to 收件人,多个邮箱地址以半角逗号分隔
* @param cc 抄送,多个邮箱地址以半角逗号分隔
* @param mailSubject 邮件主题
* @param mailBody 邮件正文
* @param attachments 附件路径
* @return
*/
public static EmailUtil entity(String smtpHost, String sendUserEmail, String sendUserPass, String to, String cc, String mailSubject, String mailBody,
List<String> attachments) {
return new EmailUtil(smtpHost, sendUserEmail, sendUserPass, to, cc, mailSubject, mailBody, attachments);
}
/**
* 邮件实体
*
* @param smtpHost 邮件服务器地址
* @param sendUserEmail 发件邮件地址
* @param sendUserPass 发件邮箱密码
* @param to 收件人,多个邮箱地址以半角逗号分隔
* @param mailSubject 邮件主题
* @param mailBody 邮件正文
* @return
*/
public static EmailUtil entity(String smtpHost, String sendUserEmail, String sendUserPass, String to, String mailSubject, String mailBody) {
return new EmailUtil(smtpHost, sendUserEmail, sendUserPass, to, null, mailSubject, mailBody, null);
}
/**
* 默认邮件实体,用了默认的发送帐号和邮件服务器
*
* @param to 收件人,多个邮箱地址以半角逗号分隔
* @param cc 抄送,多个邮箱地址以半角逗号分隔
* @param subject 邮件主题
* @param body 邮件正文
* @param attachments 附件全路径
* @return
*/
public static EmailUtil defaultEntity(String to, String cc, String subject, String body, List<String> attachments) {
return new EmailUtil(defaultSmtpHost, defaultSenderEmail, defaultSenderPass, to, cc, subject, body, attachments);
}
/**
* 设置邮件主题
*
* @param mailSubject
* @return
*/
private boolean setSubject(String mailSubject) {
try {
mimeMsg.setSubject(mailSubject);
} catch (Exception e) {
return false;
}
return true;
}
/**
* 设置邮件内容,并设置其为文本格式或HTML文件格式,编码方式为UTF-8
*
* @param mailBody
* @return
*/
private boolean setBody(String mailBody) {
try {
BodyPart bp = new MimeBodyPart();
bp.setContent("<meta http-equiv=Content-Type content=text/html; charset=UTF-8>" + mailBody, "text/html;charset=UTF-8");
// 在组件上添加邮件文本
mp.addBodyPart(bp);
} catch (Exception e) {
logger.debug("设置邮件正文时发生错误!" + e);
return false;
}
return true;
}
/**
* 添加一个附件
*
* @param filename 邮件附件的地址,只能是本机地址而不能是网络地址,否则抛出异常
* @return
*/
public boolean addFileAffix(String filename) {
try {
if (filename != null && filename.length() > 0) {
BodyPart bp = new MimeBodyPart();
FileDataSource fileds = new FileDataSource(filename);
bp.setDataHandler(new DataHandler(fileds));
bp.setFileName(MimeUtility.encodeText(fileds.getName(), "utf-8", null)); // 解决附件名称乱码
mp.addBodyPart(bp);// 添加附件
files.add(fileds);
}
} catch (Exception e) {
logger.debug("增加邮件附件:" + filename + "发生错误!" + e);
return false;
}
return true;
}
/**
* 删除所有附件
*
* @return
*/
public boolean delFileAffix() {
try {
FileDataSource fileds = null;
for (Iterator<FileDataSource> it = files.iterator(); it.hasNext(); ) {
fileds = it.next();
if (fileds != null && fileds.getFile() != null) {
fileds.getFile().delete();
}
}
} catch (Exception e) {
return false;
}
return true;
}
/**
* 设置发件人地址
*
* @param from 发件人地址
* @return
*/
private boolean setFrom(String from) {
try {
mimeMsg.setFrom(new InternetAddress(from));
} catch (Exception e) {
return false;
}
return true;
}
/**
* 设置收件人地址
*
* @param to 收件人的地址
* @return
*/
private boolean setTo(String to) {
if (to == null)
return false;
try {
mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));
} catch (Exception e) {
return false;
}
return true;
}
/**
* 设置抄送
*
* @param cc
* @return
*/
private boolean setCC(String cc) {
if (cc == null) {
return false;
}
try {
mimeMsg.setRecipients(Message.RecipientType.CC, InternetAddress.parse(cc));
} catch (Exception e) {
return false;
}
return true;
}
/**
* 发送邮件
*
* @return
*/
public boolean send() throws Exception {
mimeMsg.setContent(mp);
mimeMsg.saveChanges();
logger.debug("正在发送邮件....");
Transport transport = session.getTransport("smtp");
// 连接邮件服务器并进行身份验证
transport.connect(smtpHost, sendUserEmail, sendUserPass);
// 发送邮件
transport.sendMessage(mimeMsg, mimeMsg.getRecipients(Message.RecipientType.TO));
logger.debug("发送邮件成功!");
transport.close();
return true;
}
public static void main(String[] args) {
EmailUtil email = EmailUtil.entity("smtp.163.com", "发件人邮箱", "发件人密码", "收件人邮箱", "测试邮件发送标题", "测试邮件发送内容");
try {
email.send();
} catch (Exception e) {
e.printStackTrace();
}
}
}