java发送邮件

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环境

jdk1.8
activation.jar
javax.mail-1.6.2.jar
log4j-1.2.12.jar
commons-logging-1.1.1.jar

配置

开启服务

以qq邮箱为例，开启POP3/SMTP-IMAP/SMTP服务
邮箱-设置-账户


生成授权码之后一定要记住，代码中会用到

代码

com.email.util下EmailUtil.java

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package com.email.util;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import org.apache.log4j.Logger;
import java.io.File;
import java.util.Properties;
/**
 * 	封装Email相关的操作
 */
public final class EmailUtil {
	private static Logger logger = Logger.getLogger(EmailUtil.class);
    private Properties properties = new Properties();
    /**
     * Message对象将存储我们实际发送的电子邮件信息，
     */
    private MimeMessage message;

    /**
     * Session类代表JavaMail中的一个邮件会话。
     */
    private Session session;


    private Transport transport;
    private String mailHost = "";
    private int port = 465;
    private boolean auth = false;
    private String sender_username = "";
    private String sender_password = "";

    /**
     *	 初始化方法
     */
    public EmailUtil(boolean debug) {
        this.mailHost = EmailPropertiesUtil.getProperty("mail.smtp.host");
        this.port = Integer.valueOf(EmailPropertiesUtil.getProperty("mail.smtp.port"));
        this.auth = Boolean.parseBoolean(EmailPropertiesUtil.getProperty("mail.smtp.auth"));
        this.sender_username = EmailPropertiesUtil.getProperty("mail.sender.username");
        this.sender_password = EmailPropertiesUtil.getProperty("mail.sender.password");
        properties.put("mail.smtp.host", mailHost);
        properties.put("mail.smtp.auth", auth);
        properties.put("mail.smtp.port", String.valueOf(port));
        properties.put("mail.sender.username", sender_username);
        properties.put("mail.sender.password", sender_password);
        properties.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");

        session = Session.getInstance(properties);
        session.setDebug(debug);//开启后有调试信息
        message = new MimeMessage(session);
    }

    /**
     *	 发送邮件
     *
     * @param subject     邮件主题
     * @param sendHtml    邮件内容
     * @param receiveUser 收件人地址
     */
    public void doSendHtmlEmail(String subject, String sendHtml, String receiveUser) {
        try {
            // 发件人
            InternetAddress from = new InternetAddress(sender_username);
            // 下面这个是设置发送人的Nick name
            //InternetAddress from = new InternetAddress(MimeUtility.encodeWord("幻影") + " <" + sender_username + ">");
            message.setFrom(from);

            // 收件人
            InternetAddress to = new InternetAddress(receiveUser);
            message.setRecipient(Message.RecipientType.TO, to);//还可以有CC、BCC

            // 邮件主题
            message.setSubject(subject);

            String content = sendHtml.toString();
            // 邮件内容,也可以使纯文本"text/plain"
            message.setContent(content, "text/html;charset=UTF-8");

            // 保存邮件
            message.saveChanges();

            transport = session.getTransport("smtp");
            // smtp验证，就是你用来发邮件的邮箱用户名密码
            logger.info("授权码:"+sender_password);
            transport.connect(mailHost, port, sender_username, sender_password);
            // 发送
            transport.sendMessage(message, message.getAllRecipients());
            //System.out.println("send success!");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (transport != null) {
                try {
                    transport.close();
                } catch (MessagingException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * 	发送邮件
     *
     * @param subject     邮件主题
     * @param sendHtml    邮件内容
     * @param receiveUser 收件人地址
     * @param attachment  附件
     */
    public void doSendHtmlEmail(String subject, String sendHtml, String receiveUser, File attachment) {
        try {
            // 发件人
            InternetAddress from = new InternetAddress(sender_username);
            message.setFrom(from);

            // 收件人
            InternetAddress to = new InternetAddress(receiveUser);
            message.setRecipient(Message.RecipientType.TO, to);

            // 邮件主题
            message.setSubject(subject);

            // 向multipart对象中添加邮件的各个部分内容，包括文本内容和附件
            Multipart multipart = new MimeMultipart();

            // 添加邮件正文
            BodyPart contentPart = new MimeBodyPart();
            contentPart.setContent(sendHtml, "text/html;charset=UTF-8");
            multipart.addBodyPart(contentPart);

            // 添加附件的内容
            if (attachment != null) {
                BodyPart attachmentBodyPart = new MimeBodyPart();
                DataSource source = new FileDataSource(attachment);
                attachmentBodyPart.setDataHandler(new DataHandler(source));

                // 网上流传的解决文件名乱码的方法，其实用MimeUtility.encodeWord就可以很方便的搞定
                // 这里很重要，通过下面的Base64编码的转换可以保证你的中文附件标题名在发送时不会变成乱码
                //sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
                //messageBodyPart.setFileName("=?GBK?B?" + enc.encode(attachment.getName().getBytes()) + "?=");

                //MimeUtility.encodeWord可以避免文件名乱码
                attachmentBodyPart.setFileName(MimeUtility.encodeWord(attachment.getName()));
                multipart.addBodyPart(attachmentBodyPart);
            }

            // 将multipart对象放到message中
            message.setContent(multipart);
            // 保存邮件
            message.saveChanges();

            transport = session.getTransport("smtp");
            // smtp验证，就是你用来发邮件的邮箱用户名密码
            transport.connect(mailHost, port, sender_username, sender_password);
            // 发送
            transport.sendMessage(message, message.getAllRecipients());
            
            logger.info("send success!");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (transport != null) {
                try {
                    transport.close();
                } catch (MessagingException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    public static void main(String[] args) {
    	EmailUtil eu = new EmailUtil(true);
    	eu.doSendHtmlEmail("ceshi", "这是一个测试邮件", "himingwang@126.com");
	}
}

com.email.util下EmailPropertiesUtil.java

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package com.email.util;
import java.io.IOException;
import java.util.Properties;
/**
 * @author wangming
 * @version
 * 	读取获取配置文件相关信息
 * */
public class EmailPropertiesUtil {
	private static Properties  p = System.getProperties();
	private static EmailPropertiesUtil propertiesUtil = null;
	private EmailPropertiesUtil(){
		try {
			p.load(EmailPropertiesUtil.class.getResourceAsStream("email.properties"));
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public static String getProperty(String key){
		if(propertiesUtil == null){
			propertiesUtil = new EmailPropertiesUtil();
		}
		return p.getProperty(key);
	}
	
	public static void clear(){
		p.clear();
	}
}

com.email.util下email.properties

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mail.smtp.host=smtp.qq.com
mail.smtp.port=465
mail.smtp.auth=true
mail.sender.username=账户地址
mail.sender.password=16位授权码

src下log4j.properties

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log4j.logger.com.opslab.util = ERROR
log4j.rootLogger = ERROR , stdout
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern =%d{yyyy-MM-dd HH:mm:ss} %5p [%c:%L] - %m%n

成功结果

git克隆地址

https://github.com/syxiaowanzi/send-mail-util.git

本文标题:java发送邮件

文章作者:wangming

发布时间:2019年01月22日 - 01:36:27

最后更新:2019年01月22日 - 23:36:05

原始链接:https://syxiaowanzi.github.io/2019/01/22/java发送邮件/

许可协议: 署名-非商业性使用-禁止演绎 4.0 国际 转载请保留原文链接及作者。

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