基于JAVA的邮件发送功能

莫愁
Web
2019-08-22

简介网站用户什么时候回复了都不知道，那么如何做一个邮件通知功能呢？

字数 2946

要求

使用的是QQ作为邮件发送服务器，使用之前需要先要开启自己邮箱的POP3/SMTP和IMAP/SMTP服务。登录邮箱，然后点击“设置”，然后点击账号，下拉就会看到如下图，点击开启即可。然后会验证账号，验证成功后会有一个授权码，需要把此授权码保存好，下边的“PWD”属性就是该授权码。该工具类只需要修改USER和PWD两处即可使用。其他代码都不用动。

基于JAVA的邮件发送功能

下面就是使用的发送邮件的工具类:

com.zwb.blog.utils;import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message.RecipientType;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;

public class MailUT {
    
		//发送的邮箱 内部代码只适用qq邮箱
		private static final String USER = "";
		//授权密码 通过QQ邮箱设置->账户->POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服务->开启POP3/SMTP服务获取
		private static final String PWD = "";
	    
		private String[] to;
		private String[] cc;
		private String[] bcc;
		private String[] fileList;
		private String subject;
		private String content;
		
		
		public void sendMessage() throws MessagingException, UnsupportedEncodingException {
	        // 配置发送邮件的环境属性
	        final Properties props = new Properties();
	        props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
	        //props.setProperty("mail.smtp.port", "465");
	        props.setProperty("mail.smtp.socketFactory.port", "465");
	        // 表示SMTP发送邮件，需要进行身份验证
	        props.setProperty("mail.transport.protocol", "smtp");// 设置传输协议
	        props.put("mail.smtp.auth", "true");
	        props.put("mail.smtp.host", "smtp.qq.com");
	        // 发件人的账号
	        props.put("mail.user", USER);
	        // 访问SMTP服务时需要提供的密码 
	        props.put("mail.password", PWD);

// 构建授权信息，用于进行SMTP进行身份验证
	        Authenticator authenticator = new Authenticator() {
	            @Override
	            protected PasswordAuthentication getPasswordAuthentication() {
	                // 用户名、密码
	                String userName = props.getProperty("mail.user");
	                String password = props.getProperty("mail.password");
	                return new PasswordAuthentication(userName, password);
	            }
	        };
	        // 使用环境属性和授权信息，创建邮件会话
	        Session mailSession = Session.getInstance(props, authenticator);
	        // 创建邮件消息
	        MimeMessage message = new MimeMessage(mailSession);
	        BodyPart messageBodyPart = new MimeBodyPart(); 
	        Multipart multipart = new MimeMultipart(); 
	        // 设置发件人
	        InternetAddress form = new InternetAddress(
	                props.getProperty("mail.user"));
	        message.setFrom(form);
	        //发送
	        if (to != null) { 
	        	String toList = getMailList(to); 
	        	InternetAddress[] iaToList = new InternetAddress().parse(toList); 
	        	message.setRecipients(RecipientType.TO, iaToList); // 收件人 
	        } 
	        //抄送 
	        if (cc != null) { 
	            String toListcc = getMailList(cc); 
	            InternetAddress[] iaToListcc = new InternetAddress().parse(toListcc); 
	            message.setRecipients(RecipientType.CC, iaToListcc); // 抄送人 
	        } 
	        //密送 
	        if (bcc != null) { 
	            String toListbcc = getMailList(bcc); 
	            InternetAddress[] iaToListbcc = new InternetAddress().parse(toListbcc); 
	            message.setRecipients(RecipientType.BCC, iaToListbcc); // 密送人 
	        } 
	        message.setSentDate(new Date()); // 发送日期 
	        message.setSubject(subject); // 主题 
	        message.setText(content); // 内容 
	        //显示以html格式的文本内容 
	        messageBodyPart.setContent(content,"text/html;charset=utf-8"); 
	        multipart.addBodyPart(messageBodyPart); 
	        //保存多个附件 
	        if(fileList!=null){ 
	            addTach(fileList, multipart); 
	        } 
	        message.setContent(multipart); 
	        // 发送邮件
	        Transport.send(message);
	    }

private String getMailList(String[] mailArray) { 
			StringBuffer toList = new StringBuffer(); 
			int length = mailArray.length; 
			if (mailArray != null && length < 2) { 
				toList.append(mailArray[0]); 
			} else { 
				for (int i = 0; i < length; i++) { 
					toList.append(mailArray[i]); 
					if (i != (length - 1)) { 
						toList.append(","); 
					} 
				} 
			} 
			return toList.toString(); 
		} 
		
		//添加多个附件 
		public void addTach(String fileList[], Multipart multipart) throws MessagingException, UnsupportedEncodingException { 
		    for (int index = 0; index < fileList.length; index++) { 
		         MimeBodyPart mailArchieve = new MimeBodyPart(); 
		         FileDataSource fds = new FileDataSource(fileList[index]); 
		         mailArchieve.setDataHandler(new DataHandler(fds)); 
		         mailArchieve.setFileName(MimeUtility.encodeText(fds.getName(),"UTF-8","B")); 
		         multipart.addBodyPart(mailArchieve); 
	        }   
		}
		
		
		/**
		 * 发送邮件
		 * @param subject
		 * @param content
		 * @param ToUser
		 * @return
		 */
		public static boolean sendEmail(String subject,String content,String [] ToUser){
			MailUT mail = new MailUT();
			mail.setSubject(subject);
			mail.setContent(content);
			mail.setTo(ToUser);
			try {
				mail.sendMessage();
				return true;
			} catch (Exception e) {
				e.printStackTrace();
				return false;
			}
		}
		
		public void setTo(String[] to) {
			this.to = to;
		}

public void setCc(String[] cc) {
			this.cc = cc;
		}

public void setBcc(String[] bcc) {
			this.bcc = bcc;
		}
		
		public void setSubject(String subject) {
			this.subject = subject;
		}
		
		public void setContent(String content) {
			this.content = content;
		}
		
		public void setFileList(String[] fileList) {
			this.fileList = fileList;
		}
}

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