javamail实现腾讯邮箱（企业邮箱，qq邮箱）发送邮件(多收件人多附件)|电子爱好者-九游会真人第一品牌

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maven 依赖

        
        <javaemail.version>1.4.5javaemail.version>
        <mail.version>1.4.1mail.version>
        
        <dependency>
        <groupid>javamailgroupid>
            <artifactid>javamailartifactid>
            <version>${javaemail.version}version>
        dependency>
        <dependency>
            <groupid>javax.mailgroupid>
            <artifactid>mailartifactid>
            <version>${mail.version}version>
        dependency>

email.properties

     #test emailwithfile
     mail.smtp.host=smtp.exmail.qq
     mail.smtp.port=465
     mail.smtp.protocol=smtp
     mail.sender.username=你的邮箱登录名
     mail.sender.password=你的邮箱密码

代码实现

1. 未解决的问题：
   当发送多个人多邮件时，第一次发送采用ssl加密，但是第二次以后都不是采用ssl加密方式验证；
   我只创建了一个session,查看源代码发现,难道是每次发送邮件都会调用下面方法，session在第一次就消耗了？

 session s = (msg.session != null) ? msg.session session.getdefaultinstance(system.getproperties(), null);

1. 代码改进
   查看源代码 如果不需要ssl加密可以采用transport.sendmessage(msg, addresses)，因为transport.send(message,address[] address)调用了 transport.sendmessage(msg, addresses);

 session s = (msg.session != null) ? msg.session : session.getdefaultinstance(system.getproperties(), null);
    transport transport;
    if (dsize == 1) {
      transport = s.gettransport(addresses[0]);
      try {
        transport.connect();
        transport.sendmessage(msg, addresses);
      } finally {
        transport.close();
      }
      return;
    }

2.采用address[]会比采用internetaddress[]接收收件人发送多收件人邮件时更快，查看源代码发现
因为internetaddress是继承与address，
测试代码：同时向两个收件人发送两个附件信息：

long time1=system.currenttimemillis();
        boolean  issend=    sendemail.sendemail(subject, nickname, sendhtml, receiveuser, filepath);
        long time2=system.currenttimemillis();
        system.err.println("sendemail spend time:" (time2-time1));

对比结果采用address[]：

250 ok: queued as 
quit
221 bye
send success!
sendemail spend time:1520

对比结果采用internetaddress[]：

250 ok: queued as 
quit
221 bye
send success!
sendemail spend time:1210

3.经过实验发现当采用ssl验证时，邮件端口号为465，当不采用ssl验证时，端口号为25；
采用ssl验证：

debug: setdebug: javamail version 1.4.5
debug: getprovider() returning javax.mail.provider[transport,smtp,com.sun.mail.smtp.smtptransport,sun microsystems, inc]
debug smtp: useehlo true, useauth true
debug smtp: useehlo true, useauth true
debug smtp: trying to connect to host "smtp.exmail.qq", port 465, isssl true
220 smtp.qq esmtp qq mail server
debug smtp: connected to host "smtp.exmail.qq", port: 465

不采用ssl验证：

=09debug: setdebug: javamail version 1.4.5
debug: getprovider() returning javax.mail.provider[transport,smtp,com.sun.m=
ail.smtp.smtptransport,sun microsystems, inc]
debug smtp: useehlo true, useauth false
debug smtp: trying to connect to host "smtp.exmail.qq", port 25, isssl =
false
220 smtp.qq esmtp qq mail server
debug smtp: connected to host "smtp.exmail.qq", port: 25

附上源代码

package com.meyacom.tool;
import java.io.file;
import java.io.ioexception;
import java.io.inputstream;
import java.security.generalsecurityexception;
import java.util.arraylist;
import java.util.date;
import java.util.list;
import java.util.properties;
import javax.activation.datahandler;
import javax.activation.datasource;
import javax.activation.filedatasource;
import javax.mail.address;
import javax.mail.authenticator;
import javax.mail.bodypart;
import javax.mail.message;
import javax.mail.messagingexception;
import javax.mail.multipart;
import javax.mail.passwordauthentication;
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;
import org.apachemons.lang.stringutils;
import org.apache.log4j.logger;
import com.sun.mail.util.mailsslsocketfactory;
/**
 * title: fileemaliutil
 * 

 * description:发送带附件的邮件(多收件人多附件)
 * 

 * j9九游会老哥俱乐部交流区 copyright: j9九游会老哥俱乐部交流区 copyright (c) 2016
 * 

 * company:
 * 

 * 
 * @author zhoulin.zhu
 *         

 *         2016年8月25日
 */
public class sendemaliutil {
    protected logger logger = logger.getlogger(this.getclass());
    private mimemessage message;
    private string mailhost = "";
    private string mailport = "";
    private string mailprotocol = "";
    private string sender_username = "";
    private string sender_password = "";
    private properties properties = new properties();
    /*
     * 初始化方法
     */
    public sendemaliutil(boolean debug) {
        inputstream in = classloader
                .getsystemresourceasstream("email.properties");
        try {
            properties.load(in);
            this.mailhost = properties.getproperty("mail.smtp.host");
            this.mailport = properties.getproperty("mail.smtp.port");
            this.mailprotocol = properties.getproperty("mail.smtp.protocol");
            this.sender_username = properties
                    .getproperty("mail.sender.username");
            this.sender_password = properties
                    .getproperty("mail.sender.password");
        } catch (ioexception e) {
            system.out.println("读取默认参数文件异常，请重试!");
        }
    }
    /**
     * 用户名密码验证，需要实现抽象类authenticator的抽象方法passwordauthentication，
     * smtp验证类(内部类)，继承javax.mail.authenticator
     */
    class myauthenricator extends authenticator {
        string username = null;
        string password = null;
        public myauthenricator(string username, string password) {
            this.username = username;
            this.password = password;
        }
        @override
        protected passwordauthentication getpasswordauthentication() {
            return new passwordauthentication(username, password);
        }
    }
    /**
     * 指定发送邮件
     * 
     * @param subject
     *            邮件主题
     * @param sendhtml
     *            邮件内容
     * @param sender_nickname
     *            发送邮件人地址
     * @param receiveuser
     *            收件人列表，以","分割
     * @param filepath
     *            附件列表
     */
    public boolean sendemail(string subject, string sender_nickname,
            string sendhtml, string receiveuser, list filepath) {
        properties prop = new properties();
        // 协议
        prop.setproperty("mail.transport.protocol", mailprotocol);
        // 服务器
        prop.setproperty("mail.smtp.host", mailhost);
        // 端口
        prop.setproperty("mail.smtp.port", mailport);
        // 使用smtp身份验证
        prop.setproperty("mail.smtp.auth", "true");
        // 使用ssl，企业邮箱必需！
        // 开启安全协议
        mailsslsocketfactory sf = null;
        try {
            sf = new mailsslsocketfactory();
            sf.settrustallhosts(true);
        } catch (generalsecurityexception e1) {
            system.out.println("开启ssl加密异常！");           
            e1.printstacktrace();
            return false;
        }
        prop.put("mail.smtp.ssl.enable", "true");
        prop.put("mail.smtp.ssl.socketfactory", sf);
        session session = session.getdefaultinstance(prop, new myauthenricator(
                sender_username, sender_password));
        session.setdebug(true);// 开启debug模式,在控制台中或日志中有日志信息显示，也就是可以从控制台中看一下服务器的响应信息；
        message = new mimemessage(session);
        try {
            internetaddress from;
            if (stringutils.isnotblank(sender_nickname)) {
                // 发件人,昵称
                from = new internetaddress(
                        mimeutility.encodeword(sender_nickname)   "<"
                                  sender_username   ">");
            } else {
                // 发件人
                from = new internetaddress(
                        mimeutility.encodeword(sender_nickname));
            }
            message.setfrom(from);
            // 创建收件人列表
            if (stringutils.isnotblank(receiveuser)) {
                // 替换收件人的分隔符（防止中文下产生无法分割成收件人数组的'，'替换成','）
                string rescivers = receiveuser.replaceall("，", ",");
                string[] arr = rescivers.split(",");
                if (arr.length > 0) {
                    // 收件人 
                    //采用address【】比internetaddress发送邮件速度更快 因为internetaddress是继承与address，
                    address[] address=new address[arr.length];
                    //internetaddress[] address = new internetaddress[arr.length];
                    for (int i = 0; i < arr.length; i  ) {
                        address[i] = new internetaddress(arr[i]);
                    }
                    message.setrecipients(message.recipienttype.to, address);
                    // 发送时间
                    message.setsentdate(new date());
                    // 邮件主题
                    message.setsubject(subject);
                    // 向multipart对象中添加邮件的各个部分内容，包括文本内容和附件
                    multipart multipart = new mimemultipart();
                    // 添加邮件正文
                    bodypart contentpart = new mimebodypart();
                    contentpart.setcontent(sendhtml, "text/html;charset=utf-8");
                    multipart.addbodypart(contentpart);
                    // 附件操作
                    if (filepath != null && filepath.size() > 0) {
                        for (string filename : filepath) {
                            bodypart attachmentbodypart = new mimebodypart();
                            datasource source = new filedatasource(filename);
                            attachmentbodypart.setdatahandler(new datahandler(
                                    source));
                            // mimeutility.encodeword可以避免文件名乱码
                            attachmentbodypart.setfilename(mimeutility
                                    .encodeword(source.getname()));
                            multipart.addbodypart(attachmentbodypart);
                        }                       
                        // 移走集合中的所有元素
                        filepath.clear();
                    }
                    // 将multipart对象放到message中
                    message.setcontent(multipart);
                    // 保存邮件
                    message.savechanges();
                    // 不采用ssl加密发送
                    // transport = session.gettransport("smtp");
                    // smtp验证，就是你用来发邮件的邮箱用户名密码
                    // transport.connect(mailhost, sender_username,
                    // sender_password);
                    // 发送
                    // transport.sendmessage(message,
                    // message.getallrecipients());
                    // 发送                   
                    transport.send(message,address);
                    system.out.println("send success!");
                }
            }
            return true;
        } catch (exception e) {
            system.out.println("message异常！");
            e.printstacktrace();
            return false;
        }
    }
    public static void main(string[] args) {
        string subject = "测试";
        string nickname = "风中思絮";
        string sendhtml = "
由于下雨，周末不加班！
";
        string receiveuser = "xxx@meyacom，xxx@qq";
//      string receiveuser = "xxx@qq";
        list filepath = new arraylist();
//      filepath.add("d:\\javastudy\\bpm学习\\svn地址.txt");
        filepath.add("d:\\javastudy\\学习进度\\学习目标及目标.txt");
//      filepath.add("d:\\javastudy\\bpm学习\\bpm配置文档(1).docx");
        filepath.add("d:\\javastudy\\bpm学习\\oa\\任务分配.png");
//      filepath.add("d:\\javastudy\\微信支付.rar");
        sendemaliutil sendemail = new sendemaliutil(true);
        long time1=system.currenttimemillis();
        boolean  issend=    sendemail.sendemail(subject, nickname, sendhtml, receiveuser, filepath);
        long time2=system.currenttimemillis();
        system.err.println("sendemail spend time:" (time2-time1));
    }
}

本文标签： 邮箱腾讯发送邮件企业邮箱