Java实现邮件发送功能

package org.westos.email;

import com.sun.mail.util.MailSSLSocketFactory;

import javax.mail.*;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;

import java.security.GeneralSecurityException;

import java.util.Properties;

public class SendEamil {

     public static void main(String[] args) throws MessagingException, GeneralSecurityException {

         //创建一个配置文件并保存

         Properties properties = new Properties();

         properties.setProperty( "mail.host" , "smtp.qq测试数据" );

         properties.setProperty( "mail.transport.protocol" , "smtp" );

         properties.setProperty( "mail.smtp.auth" , "true" );

         //QQ存在一个特性设置SSL加密

         MailSSLSocketFactory sf = new MailSSLSocketFactory();

         sf.setTrustAllHosts( true );

         properties.put( "mail.smtp.ssl.enable" , "true" );

         properties.put( "mail.smtp.ssl.socketFactory" , sf);

         //创建一个session对象

         Session session = Session.getDefaultInstance(properties, new Authenticator() {

             @Override

             protected PasswordAuthentication getPasswordAuthentication() {

                 return new PasswordAuthentication( "619046217@qq测试数据" , "16位授权码" );

             }

         });

         //开启debug模式

         session.setDebug( true );

         //获取连接对象

         Transport transport = session.getTransport();

         //连接服务器

         transport.connect( "smtp.qq测试数据" , "619046217@qq测试数据" , "16位授权码" );

         //创建邮件对象

         MimeMessage mimeMessage = new MimeMessage(session);

         //邮件发送人

         mimeMessage.setFrom( new InternetAddress( "619046217@qq测试数据" ));

         //邮件接收人

         mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress( "875203654@qq测试数据" ));

         //邮件标题

         mimeMessage.setSubject( "Hello Mail" );

         //邮件内容

         mimeMessage.setContent( "我的想法是把代码放进一个循环里" , "text/html;charset=UTF-8" );

         //发送邮件

         transport.sendMessage(mimeMessage,mimeMessage.getAllRecipients());

         //关闭连接

         transport.close();

     }

}

package org.westos.email;

import com.sun.mail.util.MailSSLSocketFactory;

import javax.activation.DataHandler;

import javax.activation.FileDataSource;

import javax.mail.*;

import javax.mail.internet.*;

import java.security.GeneralSecurityException;

import java.util.Properties;

public class SendComplexEmail {

     public static void main(String[] args) throws GeneralSecurityException, MessagingException {

         Properties prop = new Properties();

         prop.setProperty( "mail.host" , "smtp.qq测试数据" );  设置QQ邮件服务器

         prop.setProperty( "mail.transport.protocol" , "smtp" ); // 邮件发送协议

         prop.setProperty( "mail.smtp.auth" , "true" ); // 需要验证用户名密码

         // QQ邮箱设置SSL加密

         MailSSLSocketFactory sf = new MailSSLSocketFactory();

         sf.setTrustAllHosts( true );

         prop.put( "mail.smtp.ssl.enable" , "true" );

         prop.put( "mail.smtp.ssl.socketFactory" , sf);

         //1、创建定义整个应用程序所需的环境信息的 Session 对象

         Session session = Session.getDefaultInstance(prop, new Authenticator() {

             @Override

             protected PasswordAuthentication getPasswordAuthentication() {

                 //传入发件人的姓名和授权码

                 return new PasswordAuthentication( "619046217@qq测试数据" , "16位授权码" );

             }

         });

         //2、通过session获取transport对象

         Transport transport = session.getTransport();

         //3、通过transport对象邮箱用户名和授权码连接邮箱服务器

         transport.connect( "smtp.qq测试数据" , "619046217@qq测试数据" , "16位授权码" );

         //4、创建邮件,传入session对象

         MimeMessage mimeMessage = complexEmail(session);

         //5、发送邮件

         transport.sendMessage(mimeMessage,mimeMessage.getAllRecipients());

         //6、关闭连接

         transport.close();

     }

     public static MimeMessage complexEmail(Session session) throws MessagingException {

         //消息的固定信息

         MimeMessage mimeMessage = new MimeMessage(session);

         //发件人

         mimeMessage.setFrom( new InternetAddress( "619046217@qq测试数据" ));

         //收件人

         mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress( "619046217@qq测试数据" ));

         //邮件标题

         mimeMessage.setSubject( "带图片和附件的邮件" );

         //邮件内容

         //准备图片数据

         MimeBodyPart image = new MimeBodyPart();

         DataHandler handler = new DataHandler( new FileDataSource( "E:\\IdeaProjects\\WebEmail\\resources\\测试图片.png" ));

         image.setDataHandler(handler);

         image.setContentID( "test.png" ); //设置图片id

         //准备文本

         MimeBodyPart text = new MimeBodyPart();

         text.setContent( "这是一段文本<img src='cid:test.png'>" , "text/html;charset=utf-8" );

         //附件

         MimeBodyPart appendix = new MimeBodyPart();

         appendix.setDataHandler( new DataHandler( new FileDataSource( "E:\\IdeaProjects\\WebEmail\\resources\\测试文件.txt" )));

         appendix.setFileName( "test.txt" );

         //拼装邮件正文

         MimeMultipart mimeMultipart = new MimeMultipart();

         mimeMultipart.addBodyPart(image);

         mimeMultipart.addBodyPart(text);

         mimeMultipart.setSubType( "related" ); //文本和图片内嵌成功

         //将拼装好的正文内容设置为主体

         MimeBodyPart contentText = new MimeBodyPart();

         contentText.setContent(mimeMultipart);

         //拼接附件

         MimeMultipart allFile = new MimeMultipart();

         allFile.addBodyPart(appendix); //附件

         allFile.addBodyPart(contentText); //正文

         allFile.setSubType( "mixed" ); //正文和附件都存在邮件中，所有类型设置为mixed

         //放到Message消息中

         mimeMessage.setContent(allFile);

         mimeMessage.saveChanges(); //保存修改

         return mimeMessage;

     }

}

package org.westos.mail;

public class User {

     private String name;

     private String password;

     private String mail;

     public User() {

     }

     public User(String name, String password, String mail) {

         this .name = name;

         this .password = password;

         this .mail = mail;

     }

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this .name = name;

     }

     public String getPassword() {

         return password;

     }

     public void setPassword(String password) {

         this .password = password;

     }

     public String getMail() {

         return mail;

     }

     public void setMail(String mail) {

         this .mail = mail;

     }

     @Override

     public String toString() {

         return "User{" +

                 "name='" + name + '\ '' +

                 ", password='" + password + '\ '' +

                 ", mail='" + mail + '\ '' +

                 '}' ;

     }

}

package org.westos.mail;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.IOException;

public class Servlet extends javax.servlet.http.HttpServlet {

     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         doGet(request,response);

     }

     protected void doGet(HttpServletRequest request, HttpServletResponse response) {

         //处理前端请求

         String username = request.getParameter( "username" );

         String password = request.getParameter( "password" );

         String email = request.getParameter( "email" );

         //将信息封装进user对象

         User user = new User(username, password, email);

         SendMail sendMail = new SendMail(user);

         sendMail.start(); //开启线程

         request.setAttribute( "msg" , "发送成功" );

         try {

             request.getRequestDispatcher( "msg.jsp" ).forward(request,response);

         } catch (ServletException e) {

             e.printStackTrace();

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

}

package org.westos.mail;

import com.sun.mail.util.MailSSLSocketFactory;

import javax.mail.*;

import javax.mail.internet.AddressException;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;

import java.security.GeneralSecurityException;

import java.security.PublicKey;

import java.util.Properties;

public class SendMail extends Thread {

     //发件人信息

     private String From = "619046217@qq测试数据" ;

     //发件人邮箱

     private String recipient = "619046217@qq测试数据" ;

     //邮箱密码

     private String password = "16位授权码" ;

     //邮件发送的服务器

     private String host = "smtp.qq测试数据" ;

     //收件人信息

     private User user;

     public SendMail(User user){

         this .user = user;

     }

     @Override

     public void run() {

         try {

             Properties properties = new Properties();

             properties.setProperty( "mail.host" , "smtp.qq测试数据" );

             properties.setProperty( "mail.transport.protocol" , "smtp" );

             properties.setProperty( "mail.smtp.auth" , "true" );

             //QQ存在一个特性设置SSL加密

             MailSSLSocketFactory sf = null ;

             try {

                 sf = new MailSSLSocketFactory();

             } catch (GeneralSecurityException e) {

                 e.printStackTrace();

             }

             sf.setTrustAllHosts( true );

             properties.put( "mail.smtp.ssl.enable" , "true" );

             properties.put( "mail.smtp.ssl.socketFactory" , sf);

             //创建一个session对象

             Session session = Session.getDefaultInstance(properties, new Authenticator() {

                 @Override

                 protected PasswordAuthentication getPasswordAuthentication() {

                     return new PasswordAuthentication(recipient,password);

                 }

             });

             //开启debug模式

             session.setDebug( true );

             //获取连接对象

             Transport transport = null ;

             try {

                 transport = session.getTransport();

             } catch (NoSuchProviderException e) {

                 e.printStackTrace();

             }

             //连接服务器

             transport.connect(host,From,password);

             //创建一个邮件发送对象

             MimeMessage mimeMessage = new MimeMessage(session);

             //邮件发送人

             mimeMessage.setFrom( new InternetAddress(recipient));

             //邮件接收人

             mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(user.getMail()));

             //邮件标题

             mimeMessage.setSubject( "网站注册成功" );

             //邮件内容

             mimeMessage.setContent( "网站注册成功，密码为" +user.getPassword()+ "，请妥善保管密码" , "text/html;charset=UTF-8" );

             //发送邮件

             transport.sendMessage(mimeMessage,mimeMessage.getAllRecipients());

             transport.close();

         } catch (Exception e){

             e.printStackTrace();

         }

     }

}

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

< html >

< head >

     < title >注册页面</ title >

</ head >

< body >

< form action = "${pageContext.request.contextPath}/a.do" method = "post" >

     < p >用户名：< input type = "text" name = "username" required></ p >

     < p >密码：< input type = "password" name = "password" required></ p >

     < p >邮箱：< input type = "email" name = "email" required></ p >

     < p >< input type = "submit" value = "提交" ></ p >

</ form >

</ body >

</ html >

<%@ page contentType="text/html;charset=UTF-8" language="java" %>

< html >

< head >

     < title >Title</ title >

</ head >

< body >

${msg}

</ body >

</ html >

<? xml version = "1.0" encoding = "UTF-8" ?>

< web-app xmlns = "http://xmlns.jcp.org/xml/ns/javaee"

          xmlns:xsi = "http://HdhCmsTestw3.org/2001/XMLSchema-instance"

          xsi:schemaLocation = "http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"

          version = "4.0" >

     < servlet >

         < servlet-name >Servlet</ servlet-name >

         < servlet-class >org.westos.mail.Servlet</ servlet-class >

     </ servlet >

     < servlet-mapping >

         < servlet-name >Servlet</ servlet-name >

         < url-pattern >/a.do</ url-pattern >

     </ servlet-mapping >

</ web-app >