java mail发送邮件

MailInfo.java

import java.util.Properties;

public class MailInfo {
    private String mailServerHost;// 服务器ip
    private String mailServerPort;// 端口
    private String fromAddress;// 发送者的邮件地址
    private String toAddress;// 邮件接收者地址
    private String username;// 登录邮件发送服务器的用户名
    private String password;// 登录邮件发送服务器的密码
    private boolean validate = false;// 是否需要身份验证
    private String subject;// 邮件主题
    private String content;// 邮件内容
    private String[] attachFileNames;// 附件名称
    
    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 String getFromAddress() {
        return fromAddress;
    }

    public void setFromAddress(String fromAddress) {
        this.fromAddress = fromAddress;
    }

    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 getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public boolean isValidate() {
        return validate;
    }

    public void setValidate(boolean validate) {
        this.validate = validate;
    }

    public String getSubject() {
        return subject;
    }

    public void setSubject(String subject) {
        this.subject = subject;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    public String[] getAttachFileNames() {
        return attachFileNames;
    }

    public void setAttachFileNames(String[] attachFileNames) {
        this.attachFileNames = attachFileNames;
    }

}

MyAuthenticator.Java

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

public class MyAuthenticator extends Authenticator {
    private String username = null;
    private String password = null;

    public MyAuthenticator() {
    };

    public MyAuthenticator(String username, String password) {
        this.username = username;
        this.password = password;
    }

    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(username, password);
    }

}

SimpleMail.java

import java.io.File;
import java.util.Date;
import java.util.Properties;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.Message;
import javax.mail.Multipart;
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;

public class SimpleMail {

    // 以文本格式发送邮件
    public static boolean sendTextMail(MailInfo mailInfo) {        
        //判断是否需要身份认证
        MyAuthenticator authenticator = null;
        Properties properties = 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 MyAuthenticator(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(properties, authenticator);
        try {
            Message mailMessage = new MimeMessage(sendMailSession);//根据session创建一个邮件消息 
            Address from = new InternetAddress(mailInfo.getFromAddress());//创建邮件发送者地址
            mailMessage.setFrom(from);//设置邮件消息的发送者
            Address to = new InternetAddress(mailInfo.getToAddress());//创建邮件的接收者地址
            mailMessage.setRecipient(Message.RecipientType.TO, to);//设置邮件消息的接收者
            mailMessage.setSubject(mailInfo.getSubject());//设置邮件消息的主题
            mailMessage.setSentDate(new Date());//设置邮件消息发送的时间
            //mailMessage.setText(mailInfo.getContent());//设置邮件消息的主要内容
            
            //MimeMultipart类是一个容器类，包含MimeBodyPart类型的对象
            Multipart mainPart = new MimeMultipart();
            MimeBodyPart messageBodyPart = new MimeBodyPart();//创建一个包含附件内容的MimeBodyPart
            //设置HTML内容
            messageBodyPart.setContent(mailInfo.getContent(),"text/html; charset=utf-8");
            mainPart.addBodyPart(messageBodyPart);

            //存在附件
            String[] filePaths = mailInfo.getAttachFileNames();
            if (filePaths != null && filePaths.length > 0) {
                for(String filePath:filePaths){
                    messageBodyPart = new MimeBodyPart();
                    File file = new File(filePath); 
                    if(file.exists()){//附件存在磁盘中
                        FileDataSource fds = new FileDataSource(file);//得到数据源
                        messageBodyPart.setDataHandler(new DataHandler(fds));//得到附件本身并至入BodyPart
                        messageBodyPart.setFileName(file.getName());//得到文件名同样至入BodyPart
                        mainPart.addBodyPart(messageBodyPart);
                    }
                }
            }
            
            //将MimeMultipart对象设置为邮件内容   
            mailMessage.setContent(mainPart);
            Transport.send(mailMessage);//发送邮件
            return true;
        } catch (Exception e) {
            e.printStackTrace();  
        }
        return false;
    }    
    
    // 以HTML格式发送邮件 
    public static boolean sendHtmlMail(MailInfo mailInfo) {        
        //判断是否需要身份认证
        MyAuthenticator authenticator = null;
        Properties properties = 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 MyAuthenticator(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(properties, authenticator);
        try{
            Message mailMessage = new MimeMessage(sendMailSession);//根据session创建一个邮件消息 
            Address from = new InternetAddress(mailInfo.getFromAddress());//创建邮件发送者地址
            mailMessage.setFrom(from);//设置邮件消息的发送者
            Address to = new InternetAddress(mailInfo.getToAddress());//创建邮件的接收者地址
            mailMessage.setRecipient(Message.RecipientType.TO, to);//设置邮件消息的接收者
            mailMessage.setSubject(mailInfo.getSubject());//设置邮件消息的主题
            mailMessage.setSentDate(new Date());//设置邮件消息发送的时间
            
            //MimeMultipart类是一个容器类，包含MimeBodyPart类型的对象
            Multipart mainPart = new MimeMultipart();
            MimeBodyPart messageBodyPart = new MimeBodyPart();//创建一个包含HTML内容的MimeBodyPart
            //设置HTML内容
            messageBodyPart.setContent(mailInfo.getContent(),"text/html; charset=utf-8");
            mainPart.addBodyPart(messageBodyPart);
            
            //存在附件
            String[] filePaths = mailInfo.getAttachFileNames();
            if (filePaths != null && filePaths.length > 0) {
                for(String filePath:filePaths){
                    messageBodyPart = new MimeBodyPart();
                    File file = new File(filePath); 
                    if(file.exists()){//附件存在磁盘中
                        FileDataSource fds = new FileDataSource(file);//得到数据源
                        messageBodyPart.setDataHandler(new DataHandler(fds));//得到附件本身并至入BodyPart
                        messageBodyPart.setFileName(file.getName());//得到文件名同样至入BodyPart
                        mainPart.addBodyPart(messageBodyPart);
                    }
                }
            }
            
            //将MimeMultipart对象设置为邮件内容   
            mailMessage.setContent(mainPart);
            Transport.send(mailMessage);//发送邮件
            return true;
        }catch (Exception e) {
            e.printStackTrace();
        }
        return false;
    }

}

emailTest.java

public class emailTest {
    public static void main(String[] args) {
        MailInfo mailInfo = new MailInfo();
        mailInfo.setMailServerHost("smtp.163.com");
        mailInfo.setMailServerPort("25");
        mailInfo.setValidate(true);
        mailInfo.setUsername("xxx@163.com");
        mailInfo.setPassword("xxxxx");// 您的邮箱密码
        mailInfo.setFromAddress("xxxx@163.com");
        mailInfo.setToAddress("xxxx@163.com");
        mailInfo.setSubject("设置邮箱标题");
                
        //附件
        String[] attachFileNames={"d:/Sunset.jpg"};
        mailInfo.setAttachFileNames(attachFileNames);
        
        // 这个类主要来发送邮件
        //mailInfo.setContent("设置邮箱内容");
        //SimpleMail.sendTextMail(mailInfo);// 发送文体格式
        StringBuffer demo = new StringBuffer();
        demo.append("<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">")
        .append("<html>")
        .append("<head>")
        .append("<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">")
        .append("<title>测试邮件</title>")
        .append("<style type="text/css">")
        .append(".test{font-family:"Microsoft Yahei";font-size: 18px;color: red;}")
        .append("</style>")
        .append("</head>")
        .append("<body>")
        .append("<span class="test">大家好，这里是测试Demo</span>")
        .append("</body>")
        .append("</html>");
        mailInfo.setContent(demo.toString());
        SimpleMail.sendHtmlMail(mailInfo);// 发送html格式
    }
}

在SimpleMail.java 类中，

//设置收件人信息，这种方法只可以发送给一个人
Address to = new InternetAddress(mailInfo.getToAddress());//创建邮件的接收者地址
mailMessage.setRecipient(Message.RecipientType.TO, to);//设置邮件消息的接收者

只能发送给一个收件人，修改成如下，就可以发送给多个收件人了

//设置收件人信息，这种方法可以发送给多人
@SuppressWarnings("static-access")
InternetAddress[] iaToList = new InternetAddress().parse(mailInfo.getToAddress());
mailMessage.setRecipients(Message.RecipientType.TO,iaToList); //收件人