Maven+SSM框架实现简单邮件的发送

准备工作：

1.开启你的qq邮箱的pop3/smtp服务

2.获取你的qq邮箱第三方登陆的授权码

具体步骤：

1.用电脑登陆你的qq邮箱点击设置

2.点击账户

3.往下找，找到如下选项，如果你的qq有密保需要验证才能开启，开启之后点击生成授权码

4.如果你的qq有密保，需要验证才能获取，获取之后就ok了。用手机拍个照记录一下你的授权码，java代码中需要用到哦。

maven中相关包的依赖地址：

        <dependency>
            <groupId>javax.mail</groupId>
            <artifactId>mail</artifactId>
            <version>1.5.0-b01</version>
        </dependency>

实现：

1.封装账号密码的类

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;


public class Email_Authenticator extends Authenticator {
    
	String userName = null;
    String password = null;
    
    
    public Email_Authenticator() {
    }
    
    public Email_Authenticator(String username, String password) {
        this.userName = username;
        this.password = password;
    }
    
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(userName, password);
    }
}

2.发送邮件的类（附有main方法，测试完自行删除即可）

import java.io.IOException;
import java.util.Date;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class Sendmail {
	
	public static void main(String[] args) {
		try {
			send_email("要发送的邮箱地址","测试","你好！");
		} catch (AddressException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (MessagingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

    public static void send_email(String toEmail,String subjects,String contents) throws IOException, AddressException, MessagingException{

        String to = toEmail;
        String subject = subjects;
        String content = contents;        
        
        Properties properties = new Properties();
        properties.put("mail.smtp.host", "smtp.qq.com");
        properties.put("mail.smtp.port", "25");
        properties.put("mail.smtp.auth", "true");      
        
        Authenticator authenticator = new Email_Authenticator("你的qq邮箱", "你的qq邮箱第三方登陆授权码");
        javax.mail.Session sendMailSession = javax.mail.Session.getDefaultInstance(properties, authenticator);
        MimeMessage mailMessage = new MimeMessage(sendMailSession);
        mailMessage.setFrom(new InternetAddress("你的qq邮箱"));      
        
        // Message.RecipientType.TO属性表示接收者的类型为TO
        mailMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
        mailMessage.setSubject(subject, "UTF-8");
        mailMessage.setSentDate(new Date());     
        
        // MiniMultipart类是一个容器类，包含MimeBodyPart类型的对象
        Multipart mainPart = new MimeMultipart();      
        
        // 创建一个包含HTML内容的MimeBodyPart
        BodyPart html = new MimeBodyPart();
        html.setContent(content.trim(), "text/html; charset=utf-8");
        mainPart.addBodyPart(html);
        mailMessage.setContent(mainPart);
        
        
        Transport.send(mailMessage);
    }
}