发送邮件

package cn.com.xinli.mail;

import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
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;

public class Mail {

/**
* 通常email都使用的是smtp来发送邮件，使用pop3来接受邮件
* @throws Exception
*/
public void sendMail()  throws Exception
{
String host = "192.168.0.181"; //
String from = "[email protected]"; //
String psw = "xinlilipf";
String to1 =  "[email protected]"; //
String to2 =  "[email protected]"; //
String to3 =  "[email protected]"; //

String cto1 = "[email protected]"; //


Properties props = System.getProperties();
    //host的问题
props.put("mail.smtp.host", host);
props.put("mail.smtp.auth", "true");
Email_Autherticator myauth = new Email_Autherticator(from, psw);
Session session = Session.getDefaultInstance(props, myauth);

MimeMessage message = new MimeMessage(session);
message.setContent("444", "text/plain");
message.setFrom(new InternetAddress(from));

message.addRecipient(Message.RecipientType.TO, new InternetAddress(to1));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(to2));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(to3));
message.addRecipient(Message.RecipientType.CC, new InternetAddress(cto1));

message.setSubject("系统使用情况");


System.out.println("--------------");

/** 邮件附件 */

MimeBodyPart messageBodyPart =new MimeBodyPart();
Date date = new Date();
StringBuffer str  = new StringBuffer();
str.append("大家好：")
   .append("\r\n")
   .append("     附件是系统的使用情况\r\n")
   .append("  \t       李鹏飞\r\n")
   .append("\t\t\t\t"+date);

    DataSource fds = new javax.mail.util.ByteArrayDataSource(str.toString().getBytes(),"text/html");
        messageBodyPart.setDataHandler(new DataHandler(fds));
String a = "D:\\data\\登陆情况按时间.csv";
String b = "D:\\data\\登陆情况按地市.csv";
String c = "D:\\data\\登陆情况明细.csv";

        Multipart multipart = new MimeMultipart();
        multipart.addBodyPart(messageBodyPart);
        //发送附件
        messageBodyPart = new MimeBodyPart();
        DataSource source_a =new FileDataSource(a);
        messageBodyPart.setDataHandler(new DataHandler(source_a));
        messageBodyPart.setFileName(MimeUtility.encodeText("登陆情况按时间.csv"));
        multipart.addBodyPart(messageBodyPart);
       
        messageBodyPart = new MimeBodyPart();
        DataSource source_b =new FileDataSource(b);
        messageBodyPart.setDataHandler(new DataHandler(source_b));
        messageBodyPart.setFileName(MimeUtility.encodeText("登陆情况按地市.csv"));
        multipart.addBodyPart(messageBodyPart);
       
        messageBodyPart = new MimeBodyPart();
        DataSource source_c =new FileDataSource(c);
        messageBodyPart.setDataHandler(new DataHandler(source_c));
        messageBodyPart.setFileName(MimeUtility.encodeText("登陆情况明细.csv"));     
        multipart.addBodyPart(messageBodyPart);
      
        message.setText("java");
        message.setContent(multipart);
        message.saveChanges();
        Transport.send(message);


    }
}


package cn.com.xinli.mail;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

public class Email_Autherticator extends Authenticator
{
String username = "";
    String password = "";
   
    public Email_Autherticator()
    {
       super();
    }
   
    public Email_Autherticator(String user,String pwd)
    {
   super();
   username = user;
   password = pwd;
    }
   
    public PasswordAuthentication getPasswordAuthentication()
    {
    return new PasswordAuthentication(username,password);
    }
}



1.乱码：
       MimeUtility.encodeText("登陆情况明细.csv")  搞定。

2. jar :
      activation.jar和mail.jar