Java实现邮箱发送功能实例（阿里云邮箱推送）

前言

绑定阿里云域名，创建域名账户，并配置解析域名账户，获得发送邮箱的权限，上限两百封，超出要￥…

阿里云邮件推送控制台

https://www.aliyun.com/product/directmail

申请邮箱并解析域名

https://yq.aliyun.com/articles/707997

1. 邮箱信息实体类

package cn.bitqian.mail.test;

/**
 * 邮件内容实体类
 * @author echo lovely
 * @date 2020/9/18 15:47
 */
public class mailinfo {

  // 发件人账户
  private string sendemailaccount;

  // 发件人密码
  private string sendemailpassword;

  // 收件人账户
  private string receivemailaccount;

  // 发送人姓名
  private string sendpersonname;

  // 收件人姓名
  private string receivepersonname;

  // 邮件标题
  private string mailtitle;

  // 邮件正文
  private string mailcontent;

  public mailinfo(string sendemailaccount, string sendemailpassword, string receivemailaccount,
          string sendpersonname, string receivepersonname,
          string mailtitle, string mailcontent) {
    this.sendemailaccount = sendemailaccount;
    this.sendemailpassword = sendemailpassword;
    this.receivemailaccount = receivemailaccount;
    this.sendpersonname = sendpersonname;
    this.receivepersonname = receivepersonname;
    this.mailtitle = mailtitle;
    this.mailcontent = mailcontent;
  }

  public string getsendemailaccount() {
    return sendemailaccount;
  }

  public void setsendemailaccount(string sendemailaccount) {
    this.sendemailaccount = sendemailaccount;
  }

  public string getsendemailpassword() {
    return sendemailpassword;
  }

  public void setsendemailpassword(string sendemailpassword) {
    this.sendemailpassword = sendemailpassword;
  }

  public string getreceivemailaccount() {
    return receivemailaccount;
  }

  public void setreceivemailaccount(string receivemailaccount) {
    this.receivemailaccount = receivemailaccount;
  }

  public string getmailtitle() {
    return mailtitle;
  }

  public void setmailtitle(string mailtitle) {
    this.mailtitle = mailtitle;
  }

  public string getmailcontent() {
    return mailcontent;
  }

  public void setmailcontent(string mailcontent) {
    this.mailcontent = mailcontent;
  }

  public string getsendpersonname() {
    return sendpersonname;
  }

  public void setsendpersonname(string sendpersonname) {
    this.sendpersonname = sendpersonname;
  }

  public string getreceivepersonname() {
    return receivepersonname;
  }

  public void setreceivepersonname(string receivepersonname) {
    this.receivepersonname = receivepersonname;
  }
}

2. jar包依赖

 <dependency>
  <groupid>junit</groupid>
  <artifactid>junit</artifactid>
  <version>4.11</version>
  <scope>test</scope>
 </dependency>

 <!-- mail dependency -->
 <dependency>
  <groupid>com.sun.mail</groupid>
  <artifactid>javax.mail</artifactid>
  <version>1.6.2</version>
 </dependency>

3. 发送邮箱实现

注意：

 1. 更改下面的属性，与实体类对应

代码实现

package cn.bitqian.mail.test;

import org.junit.test;

import javax.mail.session;
import javax.mail.transport;
import javax.mail.internet.internetaddress;
import javax.mail.internet.mimemessage;
import java.util.date;
import java.util.properties;


/**
 * 邮件发送工具类
 * @author echo lovely
 * @date 2020/9/18 15:54
 */
public class mailsendutils {

  // 邮箱smtp协议 这里是使用阿里云的
  public static final string myemailsmtphost = "smtpdm.aliyun.com";

  @test
  public void test() {
    mailinfo mailinfo = new mailinfo("控制台所绑定的邮箱账户名",
        "绑定账户邮箱密码",
        "收件人邮箱名", "发件人姓名",
        "收件人姓名", "邮箱标题", "邮箱内容");
    try {
      sendemail(mailinfo);
    } catch (exception e) {
      e.printstacktrace();
    }
  }

  public void sendemail(mailinfo mailinfo) throws exception {

    // 1. 创建参数配置, 用于连接邮件服务器的参数配置
    properties props = new properties();          // 参数配置
    props.setproperty("mail.transport.protocol", "smtp");  // 使用的协议（javamail规范要求）
    props.setproperty("mail.smtp.host", myemailsmtphost);  // 发件人的邮箱的 smtp 服务器地址
    props.setproperty("mail.smtp.auth", "true");      // 需要请求认证

    // 2. 根据配置创建会话对象, 用于和邮件服务器交互
    session session = session.getinstance(props);
    session.setdebug(true);                 // 设置为debug模式, 可以查看详细的发送 log

    // 3. 创建一封邮件
    mimemessage message = new mailsendutils().createmimemessage(session, mailinfo);

    // 4. 根据 session 获取邮件传输对象
    transport transport = session.gettransport();

    // 5. 使用 邮箱账号 和 密码 连接邮件服务器, 这里认证的邮箱必须与 message 中的发件人邮箱一致, 否则报错
    transport.connect(mailinfo.getsendemailaccount(), mailinfo.getsendemailpassword());

    // 6. 发送邮件, 发到所有的收件地址, message.getallrecipients() 获取到的是在创建邮件对象时添加的所有收件人, 抄送人, 密送人
    transport.sendmessage(message, message.getallrecipients());

    // 7. 关闭连接
    transport.close();
  }

	
  public mimemessage createmimemessage(session session, mailinfo mailinfo) throws exception {
    // 1. 创建一封邮件
    mimemessage message = new mimemessage(session);

    // 2. from: 发件人（昵称有广告嫌疑，避免被邮件服务器误认为是滥发广告以至返回失败，请修改昵称）
    message.setfrom(new internetaddress(mailinfo.getsendemailaccount(), mailinfo.getsendpersonname(), "utf-8"));

    // 3. to: 收件人（可以增加多个收件人、抄送、密送）
    message.setrecipient(mimemessage.recipienttype.to,
        new internetaddress(mailinfo.getreceivemailaccount(), mailinfo.getreceivepersonname(), "utf-8"));

    // 4. subject: 邮件主题（标题有广告嫌疑，避免被邮件服务器误认为是滥发广告以至返回失败，请修改标题）
    message.setsubject(mailinfo.getmailtitle(), "utf-8");

    // 5. content: 邮件正文（可以使用html标签）（内容有广告嫌疑，避免被邮件服务器误认为是滥发广告以至返回失败，请修改发送内容）
    message.setcontent(mailinfo.getmailcontent(), "text/html;charset=utf-8");

    // 6. 设置发件时间
    message.setsentdate(new date());

    // 7. 保存设置
    message.savechanges();

    return message;
  }

}

总结

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