Java Mail发送邮件流程：

简介

　　Java程序发送邮件是很频繁的操作，这两天整理一下，分两篇，第一篇介绍Java Mail发送一个简单的邮件需要哪些步骤以及准备工作。第二篇整理一下Java Mail发送带有照片、附件的邮件，然后封装一下作为一个小module在以后使用的地方使用。写完之后module会放到github上。

准备条件

一个开通了smtp协议（关于smtp协议的内容可以参考一下维基百科）的邮箱帐号，这里以163邮箱为例（这里同样要注意一下，新申请的163邮箱默认是不开通smtp协议的，要手动开启，后面具体步骤会有）。
下载Java Mail APIjar包，我项目中用的是maven

具体步骤

开通smtp协议的邮箱

申请163之后可以在下图中看到，新申请的邮箱默认是没有开通的，可以按照提示一步一步开启。

下载Java Mail

这里使用的是maven，方便、高效，不用手动去扒。

代码

核心发送代码

package org.oscar.mail.service.impl;
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import org.oscar.mail.service.ICommunicate;
import org.oscar.mail.support.Constants;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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import javax.mail.*;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
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/**
 * Description :
 * http://ivrjbhngzz.inuobi.com/  http://wbguvzortc.inuobi.com/  http://fxldvbhatz.inuobi.com/  http://abwogmfywq.inuobi.com/
 * @author : oscar
 * @version :1.0, 2016/7/9
 */ http://rqlmtjybsy.inuobi.com/  http://svdvauzsmy.inuobi.com/  http://tlgyqwcvon.inuobi.com/  http://wbjufbzydq.inuobi.com/
public class JavaMailImpl implements ICommunicate {
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    private static final Logger LOGGER = LoggerFactory.getLogger(JavaMailImpl.class);
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    @Override  http://yvrukdzcal.inuobi.com/  http://wtphlrhvzy.inuobi.com/  http://mqrmyvqral.inuobi.com/  http://kjipwabpqh.inuobi.com/
    public String sendSimpleMail(List<String> addressList, String title, Object content) {
        LOGGER.debug("|- Start send simple email...");
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        Properties props = new Properties();
        //使用的邮件服务器类型  http://qmumwcibub.inuobi.com/  http://zblnqwizlx.inuobi.com/  http://bpdxpunegl.inuobi.com/
        props.setProperty(Constants.MAIL_HOST_KEY, Constants.MAIL_HOST_VALUE);
        //使用的认证方式  http://foppulcgqj.inuobi.com/  http://rezrjpvgzg.inuobi.com/  http://wvnbvlaqsx.inuobi.com/
        props.setProperty(Constants.MAIL_AUTH_KEY, Constants.MAIL_AUTH_VALUE);
        http://pyhzrlibvc.inuobi.com/  http://etvnfmexdk.inuobi.com/  http://izzsbmgauv.inuobi.com/  http://zgekufjqjc.inuobi.com/
        Authenticator authenticator = new Authenticator() {
            public PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(Constants.MAIL_USERNAME, Constants.MAIL_PASSWORD);
            } http://ffbtdjpirf.inuobi.com/  http://ksiasyexqm.inuobi.com/  http://jvscuatlsb.inuobi.com/
        };  http://nljbszepjp.inuobi.com/  http://yqabpgiqtl.inuobi.com/  http://egecozpxar.inuobi.com/  http://bvblchydjr.inuobi.com/
        http://kirgtyujzs.inuobi.com/  http://rwgyqwcvgp.inuobi.com/  http://tptuildjpw.inuobi.com/  http://qbikldsupu.inuobi.com/
        Session session = Session.getInstance(props, authenticator);
        MimeMessage msg = new MimeMessage(session);
        try { http://gwdehxzpwq.inuobi.com/  http://zxxxvvyhil.inuobi.com/   http://wzmbqvarvb.inuobi.com/  http://dgwullqvny.inuobi.com/
            // 设置邮件的发件人  http://xbzqtlfzql.inuobi.com/  http://pvqsnfwotj.inuobi.com/  http://yxkcvbgztg.inuobi.com/
            msg.setFrom(new InternetAddress(Constants.MAIL_FROM));
            // 设置收件人  http://iawououngv.inuobi.com/ http://giqizyqjpb.inuobi.com/ http://jmhnhbttlu.inuobi.com/
            Address[] adds = convertAddress(addressList);
            msg.setRecipients(Message.RecipientType.TO, adds);
            // 设置邮件标题  http://vqcvsmslfl.inuobi.com/ http://xieukoxcua.inuobi.com/ http://xudasmjoua.inuobi.com/
            msg.setSubject(title); http://drmewcunmf.inuobi.com/ http://jeqiaumfmf.inuobi.com/ http://hngdfikzcj.inuobi.com/
            // 设置邮件内容 http://rbdvntzsls.inuobi.com/ http://xtybmdiuom.inuobi.com/ http://dgcumslekj.inuobi.com/
            msg.setContent(content, Constants.MAIL_TYPE);
            //发邮件 http://htsnvktqnx.inuobi.com/ http://bsjbefqrrp.inuobi.com/ http://aiiagzfzsg.inuobi.com/ http://viosvcuquf.inuobi.com/
            Transport.send(msg); http://ioqhggrqcq.inuobi.com/ http://szbjtbzkxh.inuobi.com/ http://slqfblptyh.inuobi.com/
        } catch (MessagingException e) { http://rfwptyakdy.inuobi.com/ http://grkjuvviae.inuobi.com/ http://jnjpvpvoaw.inuobi.com/
            e.printStackTrace(); http://iqqiauatmi.inuobi.com/ http://smwbttzszt.inuobi.com/ http://bkfifyqhnv.inuobi.com/
            return "Send failed, the reason:" + e.getMessage();
        } http://yuxotmfljc.inuobi.com/ http://baqrlorvni.inuobi.com/ http://pkvbgtzfyx.inuobi.com/ http://poaeworiyq.inuobi.com/
        return " Send success"; http://ganiromrom.inuobi.com/ http://pznbkewoif.inuobi.com/ http://xiqvnhngmm.inuobi.com/
    } http://zbaqtloevr.inuobi.com/ http://rhcumgmfdy.inuobi.com/ http://yzulelqjvq.inuobi.com/ http://omhxlunsyt.inuobi.com/
    http://tutaudxkff.inuobi.com/ http://dbxdicitnj.inuobi.com/  http://shfavhagzw.inuobi.com/ http://eyvkmpshkw.inuobi.com/
    http://ugiqtdnhob.inuobi.com/ http://xwfkvpuohb.inuobi.com/ http://eazjpwcwck.inuobi.com/ http://dosxqxqxrz.inuobi.com/
    http://qqntzzysaj.inuobi.com/ http://kmsldxdwqc.inuobi.com/ http://dvvoazbopb.inuobi.com/ http://jgskbshnut.inuobi.com/
    /** http://ztvcvoevoh.inuobi.com/ http://mbwchbhavw.inuobi.com/ http://azewozrwpw.inuobi.com/ http://sxbxbewosp.inuobi.com/
     * 将字符串类型邮箱地址转换为java mail能使用的邮箱地址
     * @param addressList 字符串类型邮箱地址集合
     * @return java mail使用的邮箱地址集合
     */ http://bmyqwdbuoi.inuobi.com/ http://uisqvpibve.inuobi.com/ http://tdknewayqw.inuobi.com/ http://lzydzhzfli.inuobi.com/
    private Address[] convertAddress(List<String> addressList) throws AddressException {
        List<Address> addresses = new ArrayList<>();
        for (String addressStr : addressList) {
            //这里没有做邮箱的合法性校验，只是做了非空和null
            if (addressStr != null && addressStr.length() > 0) {
                addresses.add(new InternetAddress(addressStr));
            } http://qbaxpvohav.inuobi.com/ http://qdalgpxksc.inuobi.com/ http://zrewovtzfz.inuobi.com/ http://zjsyqqwpwd.inuobi.com/
        } http://gpmrkkdwqz.inuobi.com/ http://jnmiahgmut.inuobi.com/ http://xllvnuagzh.inuobi.com/ http://gvgtysrxdy.inuobi.com/
        return addresses.toArray(new Address[addresses.size()]);
    } http://tcpitghqam.inuobi.com/  http://qdpwovtwzg.inuobi.com/ http://onjphpuoav.inuobi.com/ http://kurbhbhaho.inuobi.com/
} http://cgglchfwcw.inuobi.com/ http://cgcunuatnm.inuobi.com/ http://dalttpynqz.inuobi.com/ http://yielzjsolb.inuobi.com/

常量Constant.java

package org.oscar.mail.support;
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/** http://jrpibohovf.inuobi.com/ http://thbcjqjhaj.inuobi.com/ http://cwhzkdjcvr.inuobi.com/ http://kkxszddkdy.inuobi.com/
 * Description : http://sflmvoetaw.inuobi.com/ http://riqudjbhai.inuobi.com/ http://ccqilpfqwf.inuobi.com/
 * http://jjkqxlskto.inuobi.com/ http://qdnewpuzrb.inuobi.com/ http://qmjphgmslu.inuobi.com/ http://kwgnwrwcwk.inuobi.com/
 * @author : oscar http://itloiacgki.inuobi.com/ http://enpunfydks.inuobi.com/ http://rclochbdhn.inuobi.com/
 * @version :1.0, 2016/7/9
 */ http://vuuwlcxzdi.inuobi.com/ http://gwggsserdi.inuobi.com/ http://kywbubzfzi.inuobi.com/ http://jgskqxdpif.inuobi.com/
public class Constants { http://ydmewqngau.inuobi.com/ http://xbdoipioir.inuobi.com/ http://ponflsyjdb.inuobi.com/
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    /* http://hdbgzydjdx.inuobi.com/ http://npyejwbhnj.inuobi.com/ http://omvaysyrlt.inuobi.com/ http://cpllfcxghq.inuobi.com/
     * 实际项目中可以将这段常量放在properties文件中。这里简单处理
     */ http://dutdjqwpje.inuobi.com/ http://btdwojpngq.inuobi.com/ http://kvdvnhexrm.inuobi.com/ http://hfhzfmsmso.inuobi.com/
    public static final String MAIL_HOST_KEY = "mail.host";
    public static final String MAIL_HOST_VALUE = "smtp.163.com";
    public static final String MAIL_AUTH_KEY = "mail.smtp.auth";
    public static final String MAIL_AUTH_VALUE = "true";
    public static final String MAIL_FROM = "********@163.com";
    public static final String MAIL_TYPE = "text/html;charset=utf-8";
    public static final String MAIL_USERNAME = "********";
    public static final String MAIL_PASSWORD = "********";
}   http://fqbhzhmgnz.inuobi.com/ http://potmrlwpje.inuobi.com/ http://cllibhagzh.inuobi.com/ http://czpauivhuh.inuobi.com/

测试代码

package org.oscar.mail.service.impl;
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import org.junit.Before;
import org.junit.Test;
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import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMultipart;
import java.util.ArrayList;
import java.util.List;
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public class JavaMailImplTest {
    private JavaMailImpl javaMail;
    private List<String> addressList;
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    @Before
    public void setUp() {
        javaMail = new JavaMailImpl();
        addressList = new ArrayList<>();
        addressList.add("[email protected]");
        addressList.add("[email protected]");
    }
    http://ifshgjyqjr.inuobi.com/ http://khgbskbtki.inuobi.com/
    @Test
    public void testSendMail() throws Exception {
        //使用中文是为了验证是否有乱码
        String title = "来自Java Mail的邮件";
        String content = "<html><body><h1>您收到一封来自Java Mail的邮件，邮件内容是一张图片：</br></h1>" +
                "<img src=\"http://www.rgagnon.com/images/jht.gif\"/></body></html>";
        String result = javaMail.sendSimpleMail(addressList, title, content);
        System.out.println(result);
    }

}

结果展示

如何实现Java程序发送邮件