【Java】使用JavaMail發送郵件以及開啓ssl的使用總結

常見錯誤：

1.關於使用Java Mail進行郵件發送，拋出Could not connect to SMTP host: [email protected], port: 25的異常

2.使用 JavaMailSenderImpl SSL 465 發送郵件

3.java.net.SocketTimeoutException: Read timed out的解決辦法

4.如何獲取qq郵箱STMP授權碼

加密與非加密配置方式

1.簡單郵件非ssl使用25端口的STMP郵件

public class MailMessageSchedule {

    public void mailMessage()throws Exception {

        JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();
        System.setProperty("java.net.preferIPv4Stack", "true");
        //設定mail server
        senderImpl.setHost("smtp.qq.com");
        MimeMessage mailMessage = senderImpl.createMimeMessage();
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage,true,"utf-8");    messageHelper.addAttachment(fileName,file);
  
        //收件人
        messageHelper.setTo([email protected]);
        //發件人
        messageHelper.setFrom("[email protected]");
        //設置郵件標題
        messageHelper.setSubject(“標題”);
        //設置郵件內容，true表示開啓HTML文本格式  
        messageHelper.setText(content,true);
        //這是發件人郵箱信息，username表示用戶郵箱，password表示對應郵件授權碼
        senderImpl.setUsername("[email protected]") ;
        senderImpl.setPassword("授權碼") ;

        Properties prop = new Properties() ;
        prop.put("mail.smtp.auth", "true") ; // 將這個參數設爲true，讓服務器進行認證,認證用戶名和密碼是否正確
        prop.put("mail.smtp.timeout", "25000") ;
        senderImpl.setJavaMailProperties(prop);
        //發送郵件
        senderImpl.send(mailMessage);
        System.out.println("郵件發送成功..");

    }

}

2.加密郵件開啓ssl使用465端口：

public class MailMessageSchedule {

    public void mailMessage()throws Exception {

        JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();
        System.setProperty("java.net.preferIPv4Stack", "true");
        //設定mail server
        senderImpl.setHost("smtp.qq.com");

        MimeMessage mailMessage = senderImpl.createMimeMessage();
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage,true,"utf-8");    messageHelper.addAttachment(fileName,file);
        
        //收件人
        messageHelper.setTo([email protected]);
        //發件人
        messageHelper.setFrom("[email protected]");
        //設置郵件標題
        messageHelper.setSubject(“標題”);
        //設置郵件內容，true表示開啓HTML文本格式  
        messageHelper.setText(content,true);
        //這是發件人郵箱信息，username表示用戶郵箱，password表示對應郵件授權碼
        senderImpl.setUsername("[email protected]") ;
        senderImpl.setPassword("授權碼") ;
        //開啓ssl
        Properties properties = new Properties();
        properties.setProperty("mail.smtp.auth", "true");//開啓認證
        properties.setProperty("mail.debug", "true");//啓用調試
        properties.setProperty("mail.smtp.timeout", "200000");//設置鏈接超時
        properties.setProperty("mail.smtp.port", Integer.toString(25));//設置端口
        properties.setProperty("mail.smtp.socketFactory.port", Integer.toString(465));//設置ssl端口
        properties.setProperty("mail.smtp.socketFactory.fallback", "false");
        properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        senderImpl.setJavaMailProperties(properties);
        //發送郵件
        senderImpl.send(mailMessage);
        System.out.println("郵件發送成功..");

    }

}

代碼示例

1.帶附件的簡單郵件：

package com.thon.task;

import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.mail.internet.MimeMessage;
import java.io.File;
import java.util.Properties;

/**
 * @description 帶附件郵件發送
 **/
public class FileMail {
    public static void main(String[] args) throws Exception{
        JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();

        //設定mail server
        senderImpl.setHost("smtp.qq.com");

        //建立郵件消息,發送簡單郵件和html郵件的區別
        MimeMessage mailMessage = senderImpl.createMimeMessage();

        //注意這裏的boolean,等於真的時候才能嵌套圖片，在構建MimeMessageHelper時候，所給定的值是true表示啓用，
        //multipart模式 爲true時發送附件 可以設置html格式
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage,true,"utf-8");

        //設置收件人，寄件人
        messageHelper.setTo("[email protected]");
        messageHelper.setFrom("[email protected]");
        messageHelper.setSubject("測試郵件中上傳附件！");

        //true 表示啓動HTML格式的郵件
        messageHelper.setText("這是內容",true);

        FileSystemResource file = new FileSystemResource(new File("E:\\新建文件夾 (2)\\ysg.gif"));
    
        //這裏的方法調用和插入圖片是不同的。
        messageHelper.addAttachment("藥水哥.gif",file);
    
        senderImpl.setUsername("[email protected]") ; // 根據自己的情況,設置username
        senderImpl.setPassword("授權碼") ; // 根據自己的情況, 設置password
        Properties prop = new Properties() ;
        prop.put("mail.smtp.auth", "true") ; // 將這個參數設爲true，讓服務器進行認證,認證用戶名和密碼是否正確
        prop.put("mail.smtp.timeout", "25000") ;
        senderImpl.setJavaMailProperties(prop);
        //發送郵件
        senderImpl.send(mailMessage);

        System.out.println("郵件發送成功..");
    }
}

2.支持HTML樣式的文本郵件

package com.thon.task;

import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.mail.internet.MimeMessage;
import java.util.Properties;

/**

 * @description 文本郵件發送
 **/
public class HtmlMail {
    public static void main(String[] args) throws Exception{
        JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();

        //設定mail server
        senderImpl.setHost("smtp.qq.com");

        //建立郵件消息,發送簡單郵件和html郵件的區別
        MimeMessage mailMessage = senderImpl.createMimeMessage();

        //注意這裏的boolean,等於真的時候才能嵌套圖片，在構建MimeMessageHelper時候，所給定的值是true表示啓用，
        //multipart模式 爲true時發送附件 可以設置html格式
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage);

        //設置收件人，寄件人
        messageHelper.setTo("[email protected]");
        messageHelper.setFrom("[email protected]");
        messageHelper.setSubject("測試郵件中上傳附件112!！");  //郵件標題

        //true 表示啓動HTML格式的郵件
        messageHelper.setText("<html><head></head><body><h1>你好：附件中有學習資料！</h1></body></html>",true);

        senderImpl.setUsername("[email protected]") ; // 根據自己的情況,設置username
        senderImpl.setPassword("授權碼") ; // 根據自己的情況, 設置password
        Properties prop = new Properties() ;
        prop.put("mail.smtp.auth", "true") ; // 將這個參數設爲true，讓服務器進行認證,認證用戶名和密碼是否正確
        prop.put("mail.smtp.timeout", "25000") ;
        senderImpl.setJavaMailProperties(prop);
        //發送郵件
        senderImpl.send(mailMessage);

        System.out.println("郵件發送成功..");
    }
}

3.帶圖片的簡單郵件

package com.thon.task;

import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.mail.internet.MimeMessage;
import java.io.File;
import java.util.Properties;

/**
 * @description 內嵌圖片郵件發送
 **/
public class ImageMail {
    public static void main(String[] args) throws Exception{
        JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();

        //設定mail server
        senderImpl.setHost("smtp.qq.com");

        //建立郵件消息,發送簡單郵件和html郵件的區別
        MimeMessage mailMessage = senderImpl.createMimeMessage();

        //注意這裏的boolean,等於真的時候才能嵌套圖片，在構建MimeMessageHelper時候，所給定的值是true表示啓用，
        //multipart模式 爲true時發送附件 可以設置html格式
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage,true,"utf-8");

        //設置收件人，寄件人
        messageHelper.setTo("[email protected]");
        messageHelper.setFrom("[email protected]");
        messageHelper.setSubject("測試圖片郵件！");

        //true 表示啓動HTML格式的郵件
        messageHelper.setText("<html><head></head><body><h1>hello!!spring image html mail</h1>" +
                "<img src=\"cid:aaa\"/></body></html>",true);

        FileSystemResource file = new FileSystemResource(new File("/Users/thon/Pictures/漂亮/p2.jpg"));

        //插入圖片
        messageHelper.addInline("aaa",file);

        senderImpl.setUsername("[email protected]") ; // 根據自己的情況,設置username
        senderImpl.setPassword("授權碼") ; // 根據自己的情況, 設置password
        Properties prop = new Properties() ;
        prop.put("mail.smtp.auth", "true") ; // 將這個參數設爲true，讓服務器進行認證,認證用戶名和密碼是否正確
        prop.put("mail.smtp.timeout", "25000") ;
        senderImpl.setJavaMailProperties(prop);
        //發送郵件
        senderImpl.send(mailMessage);

        System.out.println("郵件發送成功..");
    }
}

4.使用ssl加密發送帶附件的html郵件：

package com.thon.schedule;

/**
 * Created by hucong on 2019-05-30.
 * 招標郵件
 */

import com.thon.commons.utils.StringUtils;
import com.thon.entity.system.Attachment;
import com.thon.model.BidMail;
import com.thon.model.BidPost;
import com.thon.model.BidPostSign;
import com.thon.service.system.AttachmentService;
import com.thon.service.utils.AttachmentUtil;
import com.thon.service.wzgl.BidMailService;
import com.thon.service.wzgl.BidPostService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;

import javax.mail.internet.MimeMessage;
import java.io.*;
import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.*;


@Component
public class MailMessageSchedule {

    @Autowired
    private BidPostService bidPostService;
    @Autowired
    private BidMailService bidMailService;
    @Autowired
    private AttachmentService attachmentService;

    public void mailMessage()throws Exception {

        JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();
        System.setProperty("java.net.preferIPv4Stack", "true");
        //設定mail server
        senderImpl.setHost("smtp.qq.com");

        MimeMessage mailMessage = senderImpl.createMimeMessage();
        MimeMessageHelper messageHelper = new MimeMessageHelper(mailMessage,true,"utf-8");

        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date currentTime = df.parse(df.format(new Date()));
        //獲取已過截止日期招標記錄
        List<BidPost> rbidPosts = bidPostService.selectByDate(currentTime);
        //獲取已經發送過的招標信息
        List<BidMail> bidMails =bidMailService.selectByDate(currentTime);
        List<BidPost> bidPosts = new ArrayList<>(rbidPosts);
        for (BidPost p : rbidPosts){
            for (BidMail m : bidMails){
                if (m.getBidPostId().equals(p.getId())){
                    bidPosts.remove(p);
                }
            }
        }
        //發送郵件
        for (BidPost bidPost:bidPosts){
            String sendException ="success";
            String title = "詢價招標通知函";
            String content = new String();
            String table = new String();
            for (BidPostSign s : bidPost.getOffers()){
                //供應商信息
                table += "<tr>" +
                        "<td>"+s.getSupplierName()+"</td>" +
                        "<td>"+s.getSupplierCode()+"</td>" +
                        "<td>"+s.getLinkman()+"</td>" +
                        "<td>"+s.getPhone()+"</td>" +
                        "<td>"+(s.getSubmitDate()==null?"未填寫日期":df.format(s.getSubmitDate()))+"</td>" +
                        "<td>"+(s.getApplyDate()==null?"未填寫日期":df.format(s.getApplyDate()))+"</td>" +
                        "</tr>" ;

                //供應商投標附件
                try
                {
                    if (!StringUtils.isNotBlank(s.getSubmitFiles())){
                        break;
                    }
                    Attachment attachment = attachmentService.getAttachment(Integer.valueOf(s.getSubmitFiles()));
                    if (attachment == null) {
                        attachment = new Attachment();
                    }
                    AttachmentUtil.read(attachment);
                    byte[] bytes = attachment.getBytes();
                    String fileName = URLEncoder.encode(attachment.getFileName(), "UTF-8");
                    String path = "/data/.material/tmp/"+"【投標文件】"+"【"+s.getSupplierName()+"】"+fileName;
                    // 根據絕對路徑初始化文件
                    File localFile = new File(path);
                    //判斷文件父目錄是否存在
                    if (!localFile.getParentFile().exists()){
                        localFile.getParentFile().mkdir();
                    }
                    if (!localFile.exists())
                    {
                        localFile.createNewFile();
                    }
                    // 輸出流
                    OutputStream os = new FileOutputStream(localFile);
                    os.write(bytes);
                    os.close();

                    messageHelper.addAttachment("【投標文件】"+"【"+s.getSupplierName()+"】"+fileName,localFile);
                }
                catch (Exception e)
                {
                    e.printStackTrace();
                    bidMailService.save(bidPost,"file_read_error_submit:"+s.getId());
                }

                //供應商申請報價附件
                try
                {
                    if (!StringUtils.isNotBlank(s.getApplyFiles())){
                        break;
                    }
                    Attachment attachment = attachmentService.getAttachment(Integer.valueOf(s.getApplyFiles()));
                    if (attachment == null) {
                        attachment = new Attachment();
                    }
                    AttachmentUtil.read(attachment);
                    byte[] bytes = attachment.getBytes();
                    String fileName = URLEncoder.encode(attachment.getFileName(), "UTF-8");
                    String path = "/data/.material/tmp/"+"【申請報價】"+"【"+s.getSupplierName()+"】"+fileName;
                    // 根據絕對路徑初始化文件
                    File localFile = new File(path);
                    if (!localFile.exists())
                    {
                        localFile.createNewFile();
                    }
                    // 輸出流
                    OutputStream os = new FileOutputStream(localFile);
                    os.write(bytes);
                    os.close();

                    messageHelper.addAttachment("【申請報價】"+"【"+s.getSupplierName()+"】"+fileName,localFile);
                }
                catch (Exception e)
                {
                    e.printStackTrace();
                    bidMailService.save(bidPost,"file_read_error_apply:"+s.getId());
                }

            }

            //設置收件人，寄件人
            if (bidPost.getEmails()!=null){
                //多郵箱用','分割
                String[] emails = bidPost.getEmails().split(",");
                messageHelper.setTo(emails);
            }
            else {
                bidMailService.save(bidPost,"email_error:"+bidPost.getEmails());
                return;
            }
            messageHelper.setFrom("[email protected]");
            messageHelper.setSubject(title);

            //true 表示啓動HTML格式的郵件
            content="<p>採購信息發佈標題："+bidPost.getTitle()+" </p>" +
                    "<p>採購分類："+bidPost.getPriceType()+"</p>" +
                    "<p>詢價編號:"+bidPost.getCode()+"</p>" +
                    "<p>申請單位:"+bidPost.getOfficeName()+"</p>" +
                    "<p>發佈者:"+bidPost.getAuthor()+"</p>" +
                    "<p>發佈日期:"+df.format(bidPost.getCreatedDate())+"</p>" +
                    "<p>截止日期:"+df.format(bidPost.getDeadlineDate())+"</p>" +
                    "<p><br /></p>" +
                    "<p><span id=\"__kindeditor_bookmark_start_10__\">" +
                    "<table style=\"width:100%;\" cellpadding=\"2\" cellspacing=\"0\" border=\"1\" bordercolor=\"#000000\">\n" +
                    "<tbody>" +
                    "<tr>" +
                    "<td>供應商名稱</td>" +
                    "<td>組織機構</td>" +
                    "<td>聯繫人</td>" +
                    "<td>手機號</td>" +
                    "<td>報價時間</td>" +
                    "<td>申請報價時間</td>" +
                    "</tr>" +
                    table +
                    "</tbody>" +
                    "</table>" +
                    "<br />" +
                    "<span id=\"__kindeditor_bookmark_start_90__\"></span>附件：<br />" +
                    "<br />" +
                    "</span>" +
                    "</p>";
            messageHelper.setText(content,true);
            senderImpl.setUsername("[email protected]") ;
            senderImpl.setPassword("授權碼") ;

            //開啓ssl
            Properties properties = new Properties();
            properties.setProperty("mail.smtp.auth", "true");//開啓認證
            properties.setProperty("mail.debug", "true");//啓用調試
            properties.setProperty("mail.smtp.timeout", "200000");//設置鏈接超時
            properties.setProperty("mail.smtp.port", Integer.toString(25));//設置端口
            properties.setProperty("mail.smtp.socketFactory.port", Integer.toString(465));//設置ssl端口
            properties.setProperty("mail.smtp.socketFactory.fallback", "false");
            properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
            senderImpl.setJavaMailProperties(properties);

            senderImpl.send(mailMessage);

            bidMailService.save(bidPost,sendException);
            System.out.println("郵件發送成功..");

            System.out.println("定時器啓動！");

        }

    }



}