Java 实现邮件发送功能

1.新建model

SendMail.java

import java.util.Properties;
 
public class SendMail {
    // 发送邮件的服务器的IP和端口
    private String mailServerHost;　　　　//服务器名称，类似163的： smtp.163.com
    private String mailServerPort = "25";　　　　//服务器端口号
    private String fromAddress;　　　　//发送邮件的地址
    private String addressName;　　　　//发送邮件的邮箱名称
    private String toAddress;　　　　//收件人地址
    private String userName;　　　　//和邮箱地址保持一致
    private String password;　　　　　//邮件安全密码，网易的是客户端授权密码
    private boolean validate = false;
    private String subject;　　　　//邮件标题
    private String content;
    private String[] attachFileNames;
 
    /**
     * 获得邮件会话属性
     */
    public Properties getProperties() {
        Properties p = new Properties();
        p.put("mail.smtp.host", this.mailServerHost);
        p.put("mail.smtp.port", this.mailServerPort);
        p.put("mail.smtp.auth", validate ? "true" : "false");
        return p;
    }
 
    public String getMailServerHost() {
        return mailServerHost;
    }
 
    public void setMailServerHost(String mailServerHost) {
        this.mailServerHost = mailServerHost;
    }
 
    public String getMailServerPort() {
        return mailServerPort;
    }
 
    public void setMailServerPort(String mailServerPort) {
        this.mailServerPort = mailServerPort;
    }
 
    public boolean isValidate() {
        return validate;
    }
 
    public void setValidate(boolean validate) {
        this.validate = validate;
    }
 
    public String[] getAttachFileNames() {
        return attachFileNames;
    }
 
    public void setAttachFileNames(String[] fileNames) {
        this.attachFileNames = fileNames;
    }
 
    public String getFromAddress() {
        return fromAddress;
    }
 
    public void setFromAddress(String fromAddress) {
        this.fromAddress = fromAddress;
    }
 
    public String getPassword() {
        return password;
    }
 
    public void setPassword(String password) {
        this.password = password;
    }
 
    public String getToAddress() {
        return toAddress;
    }
 
    public void setToAddress(String toAddress) {
        this.toAddress = toAddress;
    }
 
    public String getUserName() {
        return userName;
    }
 
    public void setUserName(String userName) {
        this.userName = userName;
    }
 
    public String getSubject() {
        return subject;
    }
 
    public void setSubject(String subject) {
        this.subject = subject;
    }
 
    public String getContent() {
        return content;
    }
 
    public void setContent(String textContent) {
        this.content = textContent;
    }
 
    public String getAddressName() {
        return addressName;
    }
 
    public void setAddressName(String addressName) {
        this.addressName = addressName;
    }
}

2.发送邮件实现类

MailSender.java

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;
 
public class MailSender {
 
    /**
     * 以文本格式发送邮件
     */
    public boolean sendTextMail(SendMail mailInfo) {
        // 判断是否需要身份认证
        Authentication authenticator = null;
        Properties pro = mailInfo.getProperties();
        if (mailInfo.isValidate()) {
            // 如果需要身份认证，则创建一个密码验证器
            authenticator = new Authentication(mailInfo.getUserName(),
                    mailInfo.getPassword());
        }
        // 根据邮件会话属性和密码验证器构造一个发送邮件的session
        Session sendMailSession = Session
                .getDefaultInstance(pro, authenticator);
        try {
            Message mailMessage = new MimeMessage(sendMailSession);
            Address from = new InternetAddress(mailInfo.getFromAddress());
            mailMessage.setFrom(from);
            Address to = new InternetAddress(mailInfo.getToAddress());
            mailMessage.setRecipient(Message.RecipientType.TO, to);
            mailMessage.setSubject(mailInfo.getSubject());
            mailMessage.setSentDate(new Date());
            String mailContent = mailInfo.getContent();
            mailMessage.setText(mailContent);
            Transport.send(mailMessage);
            return true;
        } catch (MessagingException ex) {
            ex.printStackTrace();
        }
        return false;
    }
 
    /**
     * 以HTML格式发送邮件
     */
    public boolean sendHtmlMail(SendMail mailInfo) {
        // 判断是否需要身份认证
        Authentication authenticator = null;
        Properties pro = mailInfo.getProperties();
        if (mailInfo.isValidate()) {
            authenticator = new Authentication(mailInfo.getUserName(),
                    mailInfo.getPassword());
        }
        // 根据邮件会话属性和密码验证器构造一个发送邮件的session
        Session sendMailSession = Session
                .getDefaultInstance(pro, authenticator);
        try {
            // 根据session创建一个邮件消息
            Message mailMessage = new MimeMessage(sendMailSession);
 
            mailMessage.setFrom(new InternetAddress(mailInfo.getFromAddress()));
            //设置自定义发件人昵称
            String nick="";
            try {
                nick=javax.mail.internet.MimeUtility.encodeText(mailInfo.getAddressName());
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            mailMessage.setFrom(new InternetAddress(nick+" <"+mailInfo.getFromAddress()+">"));
//            Address from = new InternetAddress(mailInfo.getFromAddress());
//            mailMessage.setFrom(from);
            Address to = new InternetAddress(mailInfo.getToAddress());
            // Message.RecipientType.TO属性表示接收者的类型为TO
            mailMessage.setRecipient(Message.RecipientType.TO, to);
            mailMessage.setSubject(mailInfo.getSubject());
            mailMessage.setSentDate(new Date());
            Multipart mainPart = new MimeMultipart();
            BodyPart html = new MimeBodyPart();
            html.setContent(mailInfo.getContent(), "text/html; charset=utf-8");
            mainPart.addBodyPart(html);
            mailMessage.setContent(mainPart);
            Transport.send(mailMessage);
            return true;
        } catch (MessagingException ex) {
            ex.printStackTrace();
        }
        return false;
    }
}

 3.邮件发送工具类

SendMailUtil.java

import java.util.HashMap;
import java.util.Map;
 
public class SendMailUtil {private static SendMail mail() {
        SendMail mail = new SendMail();
        mail.setMailServerHost("smtp.yeah.net");
        mail.setMailServerPort("25");
        mail.setValidate(true);
        mail.setUserName("发送邮件的邮箱地址");
        mail.setPassword("邮件服务器的客户端授权密码");
        mail.setFromAddress("发送邮件的邮箱地址");
        mail.setAddressName("邮箱名称");
        mail.setSubject("标题");
        return mail;
    }
 
    public static boolean checkEmail(String email) {// 验证邮箱的正则表达式
        String format = "\\p{Alpha}\\w{2,15}[@][a-z0-9]{3,}[.]\\p{Lower}{2,}";
        //p{Alpha}:内容是必选的，和字母字符[\p{Lower}\p{Upper}]等价。如：200896@163.com不是合法的。
        //w{2,15}: 2~15个[a-zA-Z_0-9]字符；w{}内容是必选的。 如：dyh@152.com是合法的。
        //[a-z0-9]{3,}：至少三个[a-z0-9]字符,[]内的是必选的；如：dyh200896@16.com是不合法的。
        //[.]:'.'号时必选的； 如：dyh200896@163com是不合法的。
        //p{Lower}{2,}小写字母，两个以上。如：dyh200896@163.c是不合法的。
        if (email.matches(format)) {
            return true;// 邮箱名合法，返回true
        } else {
            return false;// 邮箱名不合法，返回false
        }
    }
 
    public static boolean Send(String con,String email,String subject){
 
        SendMail mail = mail();
 
        mail.setSubject(subject);
 
        mail.setContent(con);
 
        if (email == null || "".equals(email)) {
            return false;
        }
        mail.setToAddress(email);
 
        try {
            MailSender sms = new MailSender();
            boolean flag = sms.sendHtmlMail(mail);
            if (flag == false)
                return false;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
 
        return true;
    }
 
}