Email邮件应用类

Bertha 。 2022-06-12 01:22 233阅读 0赞

package com.jswhzl.lease.common.util;
    
    import javax.activation.DataHandler;
    import javax.activation.DataSource;
    import javax.activation.FileDataSource;
    import javax.mail.BodyPart;
    import javax.mail.Message;
    import javax.mail.Multipart;
    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;
    
    import com.jswhzl.lease.common.config.Constants;
    import com.jswhzl.lease.entity.SendEmail;
    import com.sun.mail.util.MailSSLSocketFactory;
    
    import java.io.File;
    import java.io.UnsupportedEncodingException;
    import java.util.List;
    import java.util.Properties;
    
    
    /*@Service*/
    public  class   Email {
     
    	 private static Email email = null;  
    	
    				/** 
    			     *  
    			     * @function:获得单例 
    			     */  
    			    public static Email getInstance()  
    			    {  
    			        if(email==null)  
    			        {  
    			            synchronized (Email.class)   
    			            {  
    			                if(email==null) {  
    			                	email = new Email();  
    			                }  
    			            }  
    			        }  
    			        return email;  
    			    }  
     
    	/**
    	 * 发送邮件
    	 * 
    	 * @param mailTo
    	 *            收件人
    	 * @param title
    	 *            邮件主题
    	 * @param content
    	 *            邮件内容 换行采用\n
    	 * @param attachment
    	 *            附件文件，可为null
    	 * @throws Exception
    	 */
    	public void send(SendEmail send, File attachment) throws Exception {
    		Properties props = new Properties();
    		props.setProperty("mail.transport.protocol", Constants.EMAIL_PROTOCOL_TYPE); // 使用的协议（JavaMail规范要求）
    		props.setProperty("mail.smtp.host", "smtp."+Constants.SENDER_EMAIL_SMTP_HOST+".com"); // 发件人的邮箱的
    															// SMTP
    															// 服务器地址
    		props.setProperty("mail.smtp.auth", "true"); // 需要请求认证
    		MailSSLSocketFactory sf = new MailSSLSocketFactory();
    		sf.setTrustAllHosts(true);
    
    		props.put("mail.smtp.ssl.enable", "true");
    		props.put("mail.smtp.ssl.socketFactory", sf);
    		// 用刚刚设置好的props对象构建一个session
    		Session session = Session.getDefaultInstance(props);
    		// 有了这句便可以在发送邮件的过程中在console处显示过程信息，供调试使
    		// 用（你可以在控制台（console)上看到发送邮件的过程）
    		session.setDebug(true);
    		// 用session为参数定义消息对象
    		MimeMessage message = new MimeMessage(session);
    		try {
    
    			String nick = "";
    			try {
    				nick = javax.mail.internet.MimeUtility.encodeText(send.getName());
    			} catch (UnsupportedEncodingException e) {
    				e.printStackTrace();
    			}
    			message.setFrom(new InternetAddress(nick + " <" + send.getUserName() + ">"));
    
    			// 加载发件人地址
    			// message.setFrom(new InternetAddress(from));
    
    			if (send.getRecipients() == null || send.getRecipients().size() == 0) {
    				throw new Exception("收件人不能为空");
    			}
    			if (send.getSubject() == null || "".equals(send.getSubject())) {
    				throw new Exception("主题不能为空");
    			}
    			if (send.getContent() == null || "".equals(send.getContent())) {
    				throw new Exception("邮件正文不能为空");
    			}
    			/*
    			 * // 加载收件人地址 message.addRecipients(Message.RecipientType.TO,
    			 * InternetAddress.parse(getMailList(mailTo))); //抄送 if(cs!=null &&
    			 * cs.length>0) { message.setRecipients(Message.RecipientType.CC,
    			 * InternetAddress.parse(getMailList(cs))); // 抄送人 }
    			 */
    			if (send.getRecipients() != null && send.getRecipients().size() > 0) {
    				message.setRecipients(Message.RecipientType.BCC,
    						InternetAddress.parse(getMailList(send.getRecipients()))); // 密送人
    			}
    
    			// 加载标题
    			message.setSubject(send.getSubject());
    			// 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();
    
    			// 设置邮件的文本内容
    			BodyPart contentPart = new MimeBodyPart();
    			contentPart.setContent(send.getContent(), "text/html;charset=gb2312");
    			// contentPart.setText(content);
    			multipart.addBodyPart(contentPart);
    
    			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
    
    				// 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();
    			// 发送邮件
    			Transport transport = session.getTransport("smtp");
    			// 连接服务器的邮箱
    			System.out.println(send.getUserName() + "_--------" + send.getPassword());
    			transport.connect("smtp."+Constants.SENDER_EMAIL_SMTP_HOST+".com", send.getUserName(), send.getPassword());
    			// 把邮件发送出去
    			transport.sendMessage(message, message.getAllRecipients());
    			transport.close();
    		} catch (Exception e) {
    			e.printStackTrace();
    			throw e;
    		}
    	}
    
    	private String getMailList(List<String> mailArray) {
    		StringBuffer toList = new StringBuffer();
    		int length = mailArray.size();
    		if (mailArray != null && length < 2) {
    			toList.append(mailArray.get(0));
    		} else {
    			for (int i = 0; i < length; i++) {
    				toList.append(mailArray.get(i));
    				if (i != (length - 1)) {
    					toList.append(",");
    				}
    
    			}
    		}
    		return toList.toString();
    
    	}
           
    
    }