简单的邮件发送

对于代发邮件我们经常见于注册验证，服务通知等，在这里我们用Java和Python实现邮件发送。在Java中需要导入包mail.jar.

以下是使用Java的方法：
首先创建setMessage类用来构造邮件发送的内容，包括主题、正文、附件。实现代码如下：

import javax.activation.DataHandler;  
import javax.activation.FileDataSource;  
import javax.mail.Message;  
import javax.mail.Session;  
import javax.mail.internet.InternetAddress;  
import javax.mail.internet.MimeBodyPart;  
import javax.mail.internet.MimeMessage;  
import javax.mail.internet.MimeMultipart;  

public class setMessage{  
	
	private String from_mail;
	private String to_mail;
	private String subject;
	private String text;
	private String filePath;

	setMessage(String fmail,String tomail,String subt,String txt,String fPath)
	{
		from_mail=fmail;
		to_mail=tomail;
		subject=subt;
		text=txt;
		filePath=fPath;
	}
	/**  
          * 根据文件绝对路径创建附件如"F:\\music\\kiss.mp3"
          */
    public MimeBodyPart createAttachment(String filePath) throws Exception {  
   
    	MimeBodyPart attachmentPart = new MimeBodyPart();  
        FileDataSource fds = new FileDataSource(filePath);  
        attachmentPart.setDataHandler(new DataHandler(fds));  
        attachmentPart.setFileName(fds.getName());
        
        return attachmentPart;  
    }
    /**  
      * 根据字符创建邮件正文部分
      */ 
    public MimeBodyPart createContent(String body) throws Exception{  
    	
        MimeBodyPart contentBody = new MimeBodyPart();  
        /*用于组合文本和图片，"related"型的MimeMultipart对象*/  
        MimeMultipart contentMulti = new MimeMultipart("related");  
        MimeBodyPart textBody = new MimeBodyPart();  
        
        textBody.setContent(body, "text/html;charset=gb2312");  
        contentMulti.addBodyPart(textBody);
        contentBody.setContent(contentMulti);  
        
        return contentBody;  
    }
    /**  
      * 根据传入的 Seesion对象创建消息  
      */ 
    public MimeMessage createMessage(Session session) throws Exception{  
           
        MimeMessage msg = new MimeMessage(session);  
        msg.setFrom(new InternetAddress(from_mail));  
        msg.setRecipient(Message.RecipientType.TO, new InternetAddress(to_mail));  
        msg.setSubject(subject);  
        
        MimeBodyPart content = createContent(text); 
        
        /*将邮件中各个部分组合成MimeMultipart 对象*/  
        MimeMultipart allPart = new MimeMultipart();
        if(filePath!="")
        {
        	MimeBodyPart att = createAttachment(filePath);
        	allPart.addBodyPart(att);
        }
        allPart.addBodyPart(content);
        /* 将MimeMultipart 对象作为邮件内容并保存*/
        msg.setContent(allPart);  
        msg.saveChanges();  
        
        return msg;  
    }  
} 

然后创建MessageSender类设置邮件服务器，验证发件人信息。具体实现代码如下：

import java.util.Properties;   
import javax.mail.Message;  
import javax.mail.Session;  
import javax.mail.Transport;  
import javax.mail.internet.MimeMessage;   

public class MessageSender {  
    
     String smtpServer="smtp.";
     String user;  
     String pswd;

     MessageSender(String user,String pswd){
    	 this.user=user;
    	 this.pswd=pswd;
    	 setSmtp();
     }
     void setSmtp(){
    	 String temp=user;
    	 temp=temp.substring(temp.indexOf('@')+1, temp.length());
    	 smtpServer+=temp;
     }
     public String getuser(){
    	 return user;
     }
     /**  
       * 创建Session对象，配置传输的协议，设置需要身份认证  
       */ 
    public Session createSession(String protocol) { 
    	
        Properties property = new Properties();  
        property.setProperty("mail.transport.protocol", protocol);  
        property.setProperty("mail.smtp.auth", "true");  
        Session session = Session.getInstance(property);            
        /*启动调试功能，可以从控制台中读取服务器的响应信息，这里我将其设为关闭 */ 
        session.setDebug(false);   
        
        return session;  
    }  
    /**  
      * 传入Session、MimeMessage对象,创建 Transport对象发送邮件  
      */ 
    public void sendMail(Session session, MimeMessage msg) throws Exception {  

        /*由 Session对象获得Transport对象*/  
        Transport transport = session.getTransport();  
        /*发送用户名、密码连接到指定的 smtp服务器*/  
        transport.connect(smtpServer, user, pswd);  
        transport.sendMessage(msg, msg.getRecipients(Message.RecipientType.TO));  
        transport.close();  
    }  
    
    public static void main(String[] args) throws Exception {  
        
    	String from_ml,to_ml,subjet,txt,fpath;
    	/*以发件人的账号和密码为参数创建sender对象*/
    	MessageSender sender=new MessageSender("xxxxxxx@xx.com","*******");        
        /*使用SMTP协议来创建Session对象*/  
        Session session = sender.createSession("smtp");  
        /*收发地址、主题、正文、附件路径*/
        from_ml=sender.getuser();
        to_ml="xxxxxxxx@xx.com";
        subjet="Test mail";
        txt="This is a test mail";
        fpath="";
        MimeMessage mail = new setMessage(from_ml,to_ml,subjet,txt,fpath).createMessage(session);  
        sender.sendMail(session, mail);         
    }  
} 

Python方法：

import smtplib
from email.mime.text import MIMEText
tomail_list=["xxxxxx@xx.com"] #inbox list
mail_host="smtp.xx.com" #set server
mail_user="xxxxxxx@xx.com" #your account
mail_pass="*******" #your password 
mail_postfix="xx.com" #outbox suffix

def send_mail(to_list,sub,content):
    me="Holif"+"<"+mail_user+"@"+mail_postfix+">"
    msg = MIMEText(content,_subtype='plain',_charset='utf-8')  
    msg['Subject'] = sub  
    msg['From'] = me  
    msg['To'] = ";".join(to_list)
    try:  
        server = smtplib.SMTP()  
        server.connect(mail_host)  
        server.login(mail_user,mail_pass)  
        server.sendmail(me, to_list, msg.as_string())  
        server.close()  
        return True  
    except Exception, e:  
        print str(e)  
        return False
if __name__=='__main__':
    if send_mail(tomail_list,"test mail","This is a test mail,Please don't reply!"):
        print "success"
    else:
        print "failed"