Java编写邮件发送程序（使用QQ邮箱）

Java编写邮件发送程序（使用QQ邮箱）

一.准备工作

1.邮箱配置
因为需要使用QQ邮箱作为发送的服务器，所以需要进行一下邮箱的配置【这个过程很重要】，主要步骤如下：

• step1
  
• step2
  
• step3
  
  记住最后生成的这个权限码，很重要！这个就是网上大家流传的所谓”密码”！
  2.maven项目的pom文件

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.enmonster.strategy</groupId>
    <artifactId>MyMail</artifactId>
    <version>1.0-SNAPSHOT</version>
<dependencies>
    <!-- https://mvnrepository.com/artifact/javax.mail/mail -->
    <dependency>
        <groupId>javax.mail</groupId>
        <artifactId>mail</artifactId>
        <version>1.4</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/javax.activation/activation -->
    <dependency>
        <groupId>javax.activation</groupId>
        <artifactId>activation</artifactId>
        <version>1.1.1</version>
    </dependency>

</dependencies>

</project>

二.示例

import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;

public class SendEmail
{
    public static void main(String [] args)
    {
        // receiver email
        String to = "[email protected]";
        //sender email
        String from = "[email protected]";
        Properties props = System.getProperties();

        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.ssl.enable", "true");
        props.put("mail.smtp.host","smtp.qq.com");// 设置邮件服务器
        props.put("mail.user","[email protected]");
        props.put("mail.password","hukn......liacf");//开启pop3/smtp时的验证码
        props.put("mail.smtp.port","25");
        props.put("mail.smtp.starttls.enable", "true");

        // 获取默认session对象
        Session session = Session.getDefaultInstance(props,new Authenticator(){
            public PasswordAuthentication getPasswordAuthentication()
            {
                return new PasswordAuthentication(
                        "[email protected]",
                        "hukn.....cliacf"); //发件人邮件用户名、授权码
            }
        });
        session.setDebug(true);//代表启用debug模式，可以在控制台输出smtp协议应答的过程

        try{
            // 创建默认的 MimeMessage 对象
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(from));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
            message.setSubject("This is the Subject Line!");

            // 设置消息体
            message.setText("This is actual message");

            // 发送消息
            Transport.send(message);
            System.out.println("Sent message successfully....");
        }catch (MessagingException mex) {
            mex.printStackTrace();
        }
    }
}

控制台的输出

DEBUG: setDebug: JavaMail version 1.4ea
DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: useEhlo true, useAuth true
DEBUG SMTP: trying to connect to host "smtp.qq.com", port 25, isSSL false
220 smtp.qq.com Esmtp QQ Mail Server
DEBUG SMTP: connected to host "smtp.qq.com", port: 25

EHLO DESKTOP-EC2S2V4
250-smtp.qq.com
250-PIPELINING
250-SIZE 73400320
250-STARTTLS
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN
250-MAILCOMPRESS
250 8BITMIME
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "73400320"
DEBUG SMTP: Found extension "STARTTLS", arg ""
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg ""
DEBUG SMTP: Found extension "MAILCOMPRESS", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
STARTTLS
220 Ready to start TLS
EHLO DESKTOP-EC2S2V4
250-smtp.qq.com
250-PIPELINING
250-SIZE 73400320
250-AUTH LOGIN PLAIN
250-AUTH=LOGIN
250-MAILCOMPRESS
250 8BITMIME
DEBUG SMTP: Found extension "PIPELINING", arg ""
DEBUG SMTP: Found extension "SIZE", arg "73400320"
DEBUG SMTP: Found extension "AUTH", arg "LOGIN PLAIN"
DEBUG SMTP: Found extension "AUTH=LOGIN", arg ""
DEBUG SMTP: Found extension "MAILCOMPRESS", arg ""
DEBUG SMTP: Found extension "8BITMIME", arg ""
DEBUG SMTP: Attempt to authenticate
AUTH LOGIN
334 VXNlcm5hbWU6
MTQ3MTgzMTUzOUBxcS5jb20=
334 UGFzc3dvcmQ6
aHVrbm1pZ3preGNsaWFjZg==
235 Authentication successful
DEBUG SMTP: use8bit false
MAIL FROM:<1471831539@qq.com>
250 Ok
RCPT TO:<shenliu@ahnu.edu.cn>
250 Ok
DEBUG SMTP: Verified Addresses
DEBUG SMTP:   shenliu@ahnu.edu.cn
DATA
354 End data with <CR><LF>.<CR><LF>
From: 1471831539@qq.com
To: shenliu@ahnu.edu.cn
Message-ID: <186370029.01529909771614.JavaMail.javamailuser@localhost>
Subject: This is the Subject Line!
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit

This is actual message
.
250 Ok: queued as 
QUIT
221 Bye
Sent message successfully....
Process finished with exit code 0

三.一般报错：

• Error1:javax.mail.AuthenticationFailedException: 535 authentication failed535一般是指连接密码不对，可以尝试先使用Foxmail连接一下，然后再用代码连接。