java 邮件发送

第一步：

　　先导入两个包：mail.jar和activation.jar

第二部：

　　代码实现

  1 package util.email;
  2
  3 import java.util.*;
  4 import java.io.*;
  5 import javax.mail.*;
  6 import javax.mail.internet.*;
  7 import javax.activation.*;
  8
  9 import util.FinalUtil;
 10
 11 public class SendMail {
 12      //收件人邮箱地址
 13     private String to;
 14     //发件人邮箱地址
 15     private  static String from = "";
 16     //SMTP服务器地址
 17     private  static String smtpServer = "";
 18     //登录SMTP服务器的用户名
 19     private  static String username = "";
 20     //登录SMTP服务器的密码
 21     private static  String password ="";
 22     //邮件主题
 23     private String subject;
 24     //邮件正文
 25     private String content;
 26     //记录所有附件文件的集合
 27     List<String> attachments
 28         = new ArrayList<String>();
 29     //无参数的构造器
 30     public SendMail(){
 31     }
 32
 33     {
 34         Properties p = new Properties();
 35         InputStream is;
 36         try {
 37             String path = SendMail.class.getResource("/email.Properties").toURI().getPath(); ;
 38             System.out.println(path);
 39             is = new FileInputStream(new File(path));
 40             p.load(is);
 41             SendMail.username = p.getProperty("username").toString().trim();        //获取用户名
 42             SendMail.password = p.getProperty("password").toString().trim();        //获取密码
 43             SendMail.smtpServer = p.getProperty("smtpServer").toString().trim();    //获取SMTP
 44             SendMail.from = p.getProperty("from").toString().trim();                //获取form来源
 45         } catch (Exception e) {
 46             e.printStackTrace();
 47         }
 48
 49     }
 50     //把邮件主题转换为中文
 51     public String transferChinese(String strText){
 52         try{
 53             strText = MimeUtility.encodeText(
 54                 new String(strText.getBytes()
 55                 , "GB2312"), "GB2312", "B");
 56         }
 57         catch(Exception e){
 58             e.printStackTrace();
 59         }
 60         return strText;
 61     }
 62     //增加附件，将附件文件名添加的List集合中
 63     public void attachfile(String fname){
 64         attachments.add(fname);
 65     }
 66
 67     //发送邮件
 68     public boolean send(){
 69         System.out.println(SendMail.from+"--"+SendMail.password+"-"+SendMail.smtpServer+"--"+SendMail.username);
 70         //创建邮件Session所需的Properties对象
 71         Properties props = new Properties();
 72         props.put("mail.smtp.host" , smtpServer);
 73         props.put("mail.smtp.auth" , "true");
 74         //创建Session对象
 75         Session session = Session.getDefaultInstance(props
 76             //以匿名内部类的形式创建登录服务器的认证对象
 77             , new Authenticator()
 78             {
 79                 public PasswordAuthentication getPasswordAuthentication()
 80                 {
 81                     return new PasswordAuthentication(username,password);
 82                 }
 83             });
 84         try{
 85             //构造MimeMessage并设置相关属性值
 86             MimeMessage msg = new MimeMessage(session);
 87             //设置发件人
 88             msg.setFrom(new InternetAddress(from));
 89             //设置收件人
 90             InternetAddress[] addresses = {new InternetAddress(to)};
 91             msg.setRecipients(Message.RecipientType.TO , addresses);
 92             //设置邮件主题
 93             subject = transferChinese(subject);
 94             msg.setSubject(subject);
 95             //构造Multipart
 96             Multipart mp = new MimeMultipart();
 97             //向Multipart添加正文
 98             MimeBodyPart mbpContent = new MimeBodyPart();
 99             mbpContent.setText(content);
100             //将BodyPart添加到MultiPart中
101             mp.addBodyPart(mbpContent);
102             //向Multipart添加附件
103             //遍历附件列表，将所有文件添加到邮件消息里
104             for(String efile : attachments)
105             {
106                 MimeBodyPart mbpFile = new MimeBodyPart();
107                 //以文件名创建FileDataSource对象
108                 FileDataSource fds = new FileDataSource(efile);
109                 //处理附件
110                 mbpFile.setDataHandler(new DataHandler(fds));
111                 mbpFile.setFileName(fds.getName());
112                 //将BodyPart添加到MultiPart中
113                 mp.addBodyPart(mbpFile);
114             }
115             //清空附件列表
116             attachments.clear();
117             //向Multipart添加MimeMessage
118             msg.setContent(mp);
119             //设置发送日期
120             msg.setSentDate(new Date());
121             //发送邮件
122             Transport.send(msg);
123         }
124         catch (MessagingException mex){
125             mex.printStackTrace();
126             return false;
127         }
128         return true;
129     }
130
131     public static void main(String[] args) {
132
133         //给总助发送邮箱
134         String content = FinalUtil.tg_content("[email protected]", "xxxxxx");
135         SendMail sendMail = new SendMail();
136         sendMail.setContent(content);
137         sendMail.setSubject(FinalUtil.EMAIL_SUJECT);
138         sendMail.setTo("[email protected]");
139
140         if(sendMail.send()){
141             System.out.println("成功发送邮件");
142         }
143     }
144     public String getTo() {
145         return to;
146     }
147     public void setTo(String to) {
148         this.to = to;
149     }
150     public static String getFrom() {
151         return from;
152     }
153     public static String getSmtpServer() {
154         return smtpServer;
155     }
156     public static String getUsername() {
157         return username;
158     }
159     public static String getPassword() {
160         return password;
161     }
162     public String getSubject() {
163         return subject;
164     }
165     public void setSubject(String subject) {
166         this.subject = subject;
167     }
168     public String getContent() {
169         return content;
170     }
171     public void setContent(String content) {
172         this.content = content;
173     }
174
175 }