java操作email发送邮件

客官°小女子只卖身不卖艺 2022-08-13 18:54 181阅读 0赞

简单记录一下java如何群发邮箱，首先需要下载一个发送邮件的jar包（email.jar）

下面是一个xml配置

<?xml version="1.0" encoding="UTF-8"?>
    <main>
    	<config>  
    		<protocol>smtp</protocol>
    		<host>smtp.163.com</host>
    		<port>25</port>
    		<email_user_name>java_xx@163.com</email_user_name>
    		<email_pass_word>xxx</email_pass_word>
    	</config>
    </main>

接下来是java代码写法

package com.task.utils;
    
    import java.util.Date;
    import java.util.Iterator;
    import java.util.Properties;
    
    import javax.mail.Authenticator;
    import javax.mail.Message;
    import javax.mail.MessagingException;
    import javax.mail.PasswordAuthentication;
    import javax.mail.Session;
    import javax.mail.Transport;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeMessage;
    
    import org.dom4j.Document;
    import org.dom4j.Element;
    import org.dom4j.io.SAXReader;
    
    public class EmailUtil {
    	private static EmailUtil emailUtil= null;
    	
    	private static String protocol;
    	private static String host;
    	private static int port;
    	private static String myEmail;
    	private static String myEmailPwd;
    	private static Element element;
    	private EmailUtil(){
    		System.out.println("初始化邮件发送配置……");
    		SAXReader saxReader = new SAXReader();
    		try {
    			String path = this.getClass().getResource("/")+"email.config.xml";
    			Document document = saxReader.read(path);
    			this.element = document.getRootElement();
    			
    			for (Iterator i = element.elementIterator("config"); i.hasNext();) {  
    	            Element foo = (Element) i.next();  
    	            this.protocol = foo.elementText("protocol");  
    	            this.host = foo.elementText("host");  
    	            this.port = Integer.parseInt(foo.elementText("port"));  
    	            this.myEmail = foo.elementText("email_user_name");
    	            this.myEmailPwd = foo.elementText("email_pass_word");
    	        } 
    			System.out.println(protocol);
    			
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    	}
    	
    	public static Session getSession(){
    		if(null==emailUtil){
    			emailUtil = new EmailUtil();
    		}
    		Properties props = new Properties();
    		props.put("mail.transport.protocol", protocol);
    		props.put("mail.smtp.host", host);  
            props.put("mail.smtp.port", port);  
            props.put("mail.smtp.auth", true);
            Session session = Session.getDefaultInstance(props,new Authenticator() {
    			@Override
            	protected PasswordAuthentication getPasswordAuthentication(){
            		return new PasswordAuthentication(myEmail, myEmailPwd);  
            	}
            
            });
            
            return session;
    	}
    	
    	public static void send(String[] emailSendAddress,String content,String subject)throws Exception{
    		Session session = getSession();
    		//Instantiate a message
    		Message mimeMessage = new MimeMessage(session);
    		//set message attributes
    		try {
    			mimeMessage.setFrom(new InternetAddress(myEmail));
    			InternetAddress[] address = new InternetAddress[emailSendAddress.length];
    			for(int i=0;i<emailSendAddress.length;i++){
    				address[i] = new InternetAddress(emailSendAddress[i]);
    				System.out.println(address[i]);
    			}
    			mimeMessage.setRecipients(Message.RecipientType.TO, address);
    			mimeMessage.setSubject(subject);
    			mimeMessage.setSentDate(new Date());	
    			mimeMessage.setContent(content,"text/html;charset=utf-8");
    			System.out.println(content);
    			
    			//send the message
    			Transport.send(mimeMessage); 
    			
    		} catch (MessagingException e) {
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}	
    	}
    	
    	public static void main(String arg0[]) throws Exception{
    		String[] str= {"3829835@qq.com","8362076@qq.com"};
    		send(str, "发送人xxx，测试群发邮箱", "测试");
    	}
    }