Java发送邮件（含附件）

• 2020 年 1 月 21 日
• 笔记

前几天写了一个Java发送邮件的帮助类i，可以发送QQ和163的邮箱，也可以发送附件,写个一个主要的方法，其他的可以自己封装。代码如下：

引入pom：

    <dependency>              <groupId>Javax.mail</groupId>              <artifactId>Javax.mail-api</artifactId>              <version>1.6.2</version>         </dependency>

package com.pay.utils;    import com.pay.utils.enums.MailType;  import org.springframework.util.StringUtils;    import Javax.activation.*;  import Javax.mail.*;  import Javax.mail.internet.*;  import Javax.mail.util.ByteArrayDataSource;  import Java.io.*;  import Java.util.HashMap;  import Java.util.Map;  import Java.util.Properties;    public class MailSender {  	private MailType mailType;  	private String userName;  	private String passWord;  	private Properties properties;      	public MailSender(MailType mailType, String userName, String passWord) {  		this.mailType = mailType;  		this.userName = userName;  		this.passWord = passWord;  		this.properties = getProperties();  	}      	public boolean sender(String recivers, String cc, String mailTitle, String mailContent, boolean isHtml, Map<String, byte[]> mapFile) throws MessagingException, IOException {  		Session session = Session.getInstance(properties);  		//2.通过session获取Transport对象（发送邮件的核心API）  		Transport ts = session.getTransport();  		//3.通过邮件用户名密码链接  		ts.connect(properties.getProperty("mail.host"), userName, this.passWord);  		//4.创建邮件  		MimeMessage mm = new MimeMessage(session);  		//设置发件人  		mm.setFrom(new InternetAddress(userName));  		Address[] address = new InternetAddress().parse(recivers);  		mm.setRecipients(Message.RecipientType.TO, address);    		//设置抄送人  		if (!StringUtils.isEmpty(cc)) {  			mm.setRecipient(Message.RecipientType.CC, new InternetAddress(cc));  		}  		mm.setSubject(mailTitle);  		if (!isHtml) {  			mailContent = String.format("<pre>%s</pre>", mailContent);  		}  		//		mm.setContent(mailContent, "text/html;charset=utf-8");  		// 创建多重消息  		Multipart multipart = new MimeMultipart();    		BodyPart bodyPart = new MimeBodyPart();  		bodyPart.setContent(mailContent, "text/html;charset=utf-8");  		multipart.addBodyPart(bodyPart);  		if (mapFile != null) {  			MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap();  			mc.addMailcap("text/html;; x-Java-content-handler=com.sun.mail.handlers.text_html");  			mc.addMailcap("text/xml;; x-Java-content-handler=com.sun.mail.handlers.text_xml");  			mc.addMailcap("text/plain;; x-Java-content-handler=com.sun.mail.handlers.text_plain");  			mc.addMailcap("multipart/*;; x-Java-content-handler=com.sun.mail.handlers.multipart_mixed");  			mc.addMailcap("message/rfc822;; x-Java-content-handler=com.sun.mail.handlers.message_rfc822");  			CommandMap.setDefaultCommandMap(mc);    			for (Map.Entry<String, byte[]> map : mapFile.entrySet()) {  				BodyPart messageBodyPart = new MimeBodyPart();  				InputStream inputStream = new ByteArrayInputStream(map.getValue());  				DataSource source = new ByteArrayDataSource(inputStream, "application/txt");  				messageBodyPart.setDataHandler(new DataHandler(source));  				messageBodyPart.setFileName(MimeUtility.encodeText(map.getKey()));  				multipart.addBodyPart(messageBodyPart);  			}    			mm.setContent(multipart);  		}  		//5.发送电子邮件  		ts.sendMessage(mm, mm.getAllRecipients());  		return true;  	}    	private Properties getProperties() {  		if (this.mailType.equals(MailType.m163)) {  			Properties prop = new Properties();  			prop.put("mail.host", "smtp.163.com");  			prop.put("mail.transport.protocol", "smtp");  			prop.put("mail.smtp.auth", true);  			return prop;  		}  		if (this.mailType.equals(MailType.qq)) {  			Properties prop = new Properties();  			prop.setProperty("mail.host", "smtp.qq.com");  			prop.setProperty("mail.transport.protocol", "smtp");  			prop.setProperty("mail.smtp.auth", "true");  			prop.setProperty("mail.smtp.socketFactory.class", "Javax.net.ssl.SSLSocketFactory");  			prop.setProperty("mail.smtp.port", "465");  			prop.setProperty("mail.smtp.socketFactory.port", "465");  			return prop;  		}  		return null;  	}    }

public enum MailType {  	m163, qq  }