java exchangemailutil 收取邮件eml

JavaWeb邮件发送功能

• 发送邮件的简单理解
• 概述
• Jar包的应用概述
• 代码 实现纯文本邮件发送
• Java实现文本图片附件复杂的邮件发送
• **JavaWeb发送邮件(网站注册成功发送提示邮件)**

• 1.User 类
• 2.servlet
• 3.SendMail
• 4.register.jsp
• 5.msg.jsp

发送邮件的简单理解

每一个邮箱都有专门的邮箱服务器

接收用POP3协议，发送用SMTP协议

概述

下载小知识：有时候jar下载不下来 可以如下操作：

打开浏览器的F12 ，选择network

，再点击要下载文件，这时候会发送一个request请求

可以直接复制该网址，如果下载不了，换成HTTP而不是用HTTPS

Jar包的应用概述

代码 实现纯文本邮件发送

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.com");

        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("[e-mail]","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.com","[e-mail]","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("[e-mail]"));

        //邮件接收人
        mimeMessage.setRecipient(Message.RecipientType.TO,new InternetAddress("[e-mail]"));

        //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();
    }
}

Java实现文本图片附件复杂的邮件发送

MIME（多用途互联网邮件扩展类型）

MimeBodyPart类

javax.mail.internet.MimeBodyPart类 表示的是一个MIME消息，它和MimeMessage类一样都是从Part接口继承过来。

MimeMultipart类

javax.mail.internet.MimeMultipart是抽象类 Multipart的实现子类,它用来组合多个MIME消息。一个MimeMultipart对象可以包含多个代表MIME消息的MimeBodyPart对象

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.com");  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("[e-mail]","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.com","[e-mail]","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("[e-mail]"));
        //收件人
        mimeMessage.setRecipient(Message.RecipientType.TO,new InternetAddress("[e-mail]"));
        //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;
    }
}

JavaWeb发送邮件(网站注册成功发送提示邮件)

1.User 类

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 + '\'' +
                '}';
    }
}

2.servlet

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();
        }


    }
}

3.SendMail

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 = "[e-mail]";
    //发件人邮箱
    private String recipient = "[e-mail]";
    //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.com";

    //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.com");

            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();
        }

    }

}

4.register.jsp

<%@ 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>

5.msg.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
${msg}
</body>
</html>