java邮箱验证

本文以163邮箱为例

1、准备(邮箱账号，邮箱必须设置POP3/SMTP/IMAP，设置步骤如下：)

》》步骤:1 开启授权码服务

》》步骤:2 手机获取验证码

》》步骤:3 设置授权码

》》步骤:4 开启服务smtp/pop3/imap

》》步骤:5 开启成功，忘记授权码可重设

2、发送邮件的jar包(以下使用的为maven的pom坐标)

<!--发送邮件-->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-email</artifactId>
            <version>1.5</version>
        </dependency>

3、代码实现

import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Properties;

//发送邮件
public class test {
    //配置信息
    private static final String MAIL_TRANSPORT_PROTOCOL ="mail.transport.protocol";//邮件的传输协议
    private static final String MAIL_TRANSPORT_PROTOCOL_VALUE ="smtp";//使用smtp协议
    private static final String MAIL_HOST ="mail.host";//发送邮件的主机
    private static final String MAIL_HOST_VALUE ="smtp.163.com"; //发送邮件的服务器地址
    private static final String MAIL_DEBUG ="mail.debug"; //调试模式
    private static final String MAIL_SMTP_AUTH ="mail.smtp.auth";//邮件smtp作者确认
    private static final String CONFIRM ="true";//确认
    private static final String SEND_ENCODING_LAYOUT ="text/html;charset=utf-8";//发送邮件的编码格式

    //邮件编辑信息(仅需写上自己的)
    private static final String MAIL_FROM =xxx@163.com";//邮件发送人
    private static final String MAIL_FROM_PASSWORD ="xxxxx";//邮件发送人授权码
    private static final String MAIL_SUBJECT_REGISTER ="xxxx【注册链接】";//邮件主题(注册链接)
    private static final String MAIL_SUBJECT_VERIFY_CODE ="xxxx【邮箱验证码】";//邮件主题(邮箱验证码)
    private static final String MAIL_ORGANIZATION ="xxxx";//邮件组织
    private static final String MAIL_WEBSITE ="https://www.xxxx.com/";//组织主页
    private static final String MAIL_ORGANIZATION_LOGO ="https://wwwxxxx.com/xxxx/xxxlogo.jpg";//网站logo
    private static final String MAIL_ORGANIZATION_QRCODE ="https://www.xxxx.com/xxxx/xxx.jpg";//网站二维码图片


    public static void main(String[] args) throws Exception{
        sendEmail(MAIL_FROM,
                "xxxx@qq.com",
                MAIL_SUBJECT_REGISTER,
                prettyLayout(MAIL_ORGANIZATION,MAIL_WEBSITE,
                        MAIL_ORGANIZATION_LOGO,
                        prettyRegisterLayout("2小时",MAIL_ORGANIZATION,"https://www.xxxx.com/user/register/8asc824jnd741n2c"),
                        MAIL_ORGANIZATION_QRCODE),
                MAIL_FROM_PASSWORD);
        sendEmail(MAIL_FROM,
                "xxxx@qq.com",
                MAIL_SUBJECT_VERIFY_CODE,
                prettyLayout(MAIL_ORGANIZATION,MAIL_WEBSITE,
                        MAIL_ORGANIZATION_LOGO,
                        prettyQrCodeLayout("2分钟","580123"),
                        MAIL_ORGANIZATION_QRCODE),
                MAIL_FROM_PASSWORD);
    }

    /**
     * 发送邮件
     * @param from 发送人(邮箱地址)
     * @param to 接收人  (邮箱地址)
     * @param subject 主题
     * @param content 内容
     * @param password  密码(密码为授权码不是邮箱的登录密码)
     * @throws Exception
     */
    public static void sendEmail(String from,String to,String subject,String content,String password) throws Exception{
        Properties props = new Properties();//key value:配置参数。真正发送邮件时再配置
        props.setProperty(MAIL_TRANSPORT_PROTOCOL, MAIL_TRANSPORT_PROTOCOL_VALUE);//指定邮件发送的协议，参数是规范规定的
        props.setProperty(MAIL_HOST, MAIL_HOST_VALUE);//指定发件服务器的地址，参数是规范规定的
//        props.setProperty(MAIL_DEBUG, "true");//邮件发送的调试模式，参数是规范规定的
        props.setProperty(MAIL_SMTP_AUTH, CONFIRM);//请求服务器进行身份认证。参数与具体的JavaMail实现有关
        Session session = Session.getInstance(props);//发送邮件时使用的环境配置
        session.setDebug(true);
        MimeMessage message = new MimeMessage(session);
        //设置邮件的头
        message.setFrom(new InternetAddress(  from  )); //谁发送的
        message.setRecipients(Message.RecipientType.TO,    to   );//发送给谁
        message.setSubject(   subject   );
        //设置正文
        message.setContent(  content  ,SEND_ENCODING_LAYOUT);
//        message.setText("<h1>hello</h1>");//纯文本
        message.saveChanges();

        //发送邮件
        Transport ts = session.getTransport();
        ts.connect(   from  , password  );       // 密码为授权码不是邮箱的登录密码
        ts.sendMessage(message, message.getAllRecipients());//对象，用实例方法}
    }

    /**
     * 邮件内容头部
     * @param websiteName 网站名称
     * @param principal 网站主页
     * @param principalImage 网站logo图片超链接
     * @param logoWidth logo图片宽度
     * @param logoHeight logo图片高度
     * @return
     */
    private static String mailHead(String websiteName,String principal,String principalImage,String logoWidth,String logoHeight){
        return "<div style="margin: 0 auto; text-align: left;
" +
                "padding: 38px 50px;  560px; font-size: 14px;
" +
                "color: #606060; background: #fff; border-radius:
" +
                "2px; font-family:Tahoma,Helvetica,'microsoft
" +
                "yahei','Hiragino Sans GB',Simsun,sans-serif;
" +
                "box-shadow: 0 0 4px rgba(0,0,0,0.2);">
" +
                "        <table style="margin: 0 auto;
" +
                "text-align: left; font-size: 14px; color: #606060;
" +
                "background: #fff; font-family: inherit;
" +
                "font-family:Tahoma,Helvetica,'microsoft
" +
                "yahei','Hiragino Sans GB',Simsun,sans-serif;" width="560" cellspacing="0" cellpadding="0" border="0">
" +
                "            <tbody><tr>
" +
                "                <th colspan="2"><a href=""+principal+"" rel="noopener" target="_blank"><img src=""+principalImage+"" width=""+logoWidth+"" height=""+logoHeight+""></a></th>
" +
                "            </tr>
" +
                "            <tr>
" +
                "                <td colspan="2" style="font-size:
" +
                "18px; padding: 30px 0
" +
                "18px;">尊敬的"+websiteName+"用户：</td>
" +
                "            </tr>
" +
                "            <tr>
" +
                "                <td colspan="2" style="line-height: 1.8;">
" +
                "                   
" +
                "<div>欢迎使用"+websiteName+"！</div>
";
    }

    /**
     * 邮件内容脚部
     * @param websiteName 网站名称
     * @param principal 网站主页
     * @param qrCode 二维码图片链接(可不填写/仅支持第一张)
     * @return
     */
    private static String mailFoot(String websiteName,String principal,String...qrCode){
        SimpleDateFormat sdf  = new SimpleDateFormat("yyyy年MM月dd日");
        String nowDate =sdf.format(new Date());
        return "            <tr>
" +
                "                <td colspan="2" style="text-align:
" +
                "right; line-height: 1.8; padding-bottom: 18px;">
" +
                "                    <div>"+websiteName+"团队</div>
" +
                "                    <div style="color:
" +
                "#909090;">"+nowDate+"</div>
" +
                "                </td>
" +
                "            </tr>
" +
                (qrCode!=null&&qrCode.length!=0?setQrCode(websiteName,qrCode[0]):"")+
                "            <tr>
" +
                "                <td colspan="2" style="padding-top: 20px; border-top: 1px solid
" +
                "#e7e7e7; line-height: 1.8; font-size: 12px; color:
" +
                "#909090;">
" +
                "                    <div>温馨提示：</div>
" +
                "                    <div>1.
" +websiteName+
                "官方网址为：<a href=""+principal+"" rel="noopener" target="_blank">"+principal+"</a>，请注意网址，防止钓鱼。</div>
" +
                "                    <div>2.
" +
                "本邮件为系统自动发出，请勿回复。</div>
" +
                "                </td>
" +
                "            </tr>
" +
                "        </tbody></table>
" +
                "    </div>";
    }

    /**
     * 输出漂亮格式(带logo,可带二维码)
     * @param websiteName 网站名称
     * @param principal 主页地址
     * @param principalImage 主页logo 323 x 48 拉伸宽度为 (超链接形式)
     * @param business 业务
     * @param qrCode 二维码 (超链接形式)
     * @return
     */
    private static String prettyLayout(String websiteName,String principal,String principalImage,String business,String...qrCode){
        return mailHead(websiteName,principal,principalImage,"","")+
                business +
                mailFoot(websiteName,principal,qrCode);


    }


    /**
     * 二维码 样式A
     * @param websiteName //网站名称
     * @param qrCode //二维码图片链接
     * @return
     */
    private static String setQrCode(String websiteName,String qrCode){
        return "            <tr>
" +
                "                <td style="padding-bottom: 20px;" width="145">
" +
                "                    <img src=""+qrCode+"" width="110" height="112">
" +
                "                </td>
" +
                "                <td style="line-height: 2;
" +
                "padding-bottom: 20px;">
" +
                "                    <div style="font-size: 18px;
" +
                "color:
" +
                "#03c5ff;">扫描关注"+websiteName+"公众号</div>
" +
                "                </td>
" +
                "            </tr>
" ;
    }

    /**
     * 发送邮箱验证码
     * @param validity 有效期/单位自行填写
     * @param verifyCode 验证码
     * @return
     */
    private static String prettyQrCodeLayout(String validity,String verifyCode){
        return "<div>邮箱验证码的有效期为:"+validity+"邮箱验证码如下:</div>
" +
                "                </td>
" +
                "            </tr>
" +
                "            <tr>
" +
                "                <td colspan="2" style="font-size:
" +
                "12px; line-height: 20px; padding-top: 14px;
" +
                "padding-bottom: 25px; color: #909090;">
" +
                "                    <div>"+verifyCode+"</div>
" +
                "                </td>
" +
                "            </tr>
";
    }

    /**
     * 发送邮箱注册激活链接
     * @param validity 有效期/单位自行填写
     * @param websiteName 网站名
     * @param verifyLink 注册验证链接
     * @return
     */
    private static String prettyRegisterLayout(String validity,String websiteName,String verifyLink){
        return  "<div>请点击以下的链接验证您的邮箱，验证成功后就可以使用"+websiteName+"提供的服务了。</div>
" +
                "                </td>
" +
                "            </tr>
" +
                "            <tr>
" +
                "                <td colspan="2" style="font-size:
" +
                "12px; line-height: 20px; padding-top: 14px;
" +
                "padding-bottom: 25px; color: #909090;">
" +
                "                    <div>该链接的有效期为"+validity+"，如链接超过有效期请重新发送邮件<a href=""+verifyLink+"" style="color: #03c5ff; text-decoration:
" +
                "underline;" rel="noopener" target="_blank">"+verifyLink+"</a></div>
" +
                "                    <div style="padding-top:
" +
                "4px;">(如果不能打开页面，请复制该地址到浏览器打开)</div>
" +
                "                </td>
" +
                "            </tr>
";
    }


}

 随机数：

/**
     * 方法1 可配置随机数
     */
    public static final String VERIFY_CODES = "0123456789";

    public static String generateVerifyCode(int verifySize){

        return generateVerifyCode(verifySize, VERIFY_CODES);
    }

    /**
     * 使用指定源生成验证码
     * @param verifySize 验证码长度
     * @param sources 验证码字符源
     * @return
     */
    public static String generateVerifyCode(int verifySize, String sources){
        if(sources == null || sources.length() == 0){
            sources = VERIFY_CODES;
        }
        int codesLen = sources.length();
        Random rand = new Random(System.currentTimeMillis());
        StringBuilder verifyCode = new StringBuilder(verifySize);
        for(int i = 0; i < verifySize; i++){
            verifyCode.append(sources.charAt(rand.nextInt(codesLen - 1)));
        }
        System.out.println(verifyCode.toString());
        return verifyCode.toString();
    }

    /**
     * 方法二直接生成6位数随机数
     * @return
     */
    public static Integer getCode() {
        Random random = new Random();
        int identifyCode = (random.nextInt(999999));
        if (identifyCode < 100000) {
            identifyCode += 100000;
        }
      System.out.println(identifyCode);
        return identifyCode;
    }