发送邮件

问题场景

利用Java发送邮件作为审核流程的通知方式。

CODE

mail-1.4.jar

package itext;

import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Properties;

/**
 * Created on 2017/8/21
 * Author: youxingyang.
 */
public class CommonUtil {
    /**
     * 获得指定类的静态变量值
     * @param className
     * @param field
     * @return
     * @throws ClassNotFoundException
     */
    public static Object getConst(String className, String field) throws ClassNotFoundException{
        Class<?> c = Class.forName(className);
        try {
            return c.getField(field).get(null);
        } catch (Exception e) {

        }
        return null;
    }

    /**
     * 封装的发送邮件方法，返回一个是否成功发送信息
     * @param recipients    收件人姓名
     * @param subject       主题
     * @param content       内容
     * @return
     * @throws Exception
     */
    public static String sendEmail(String recipients, String subject, String content) throws Exception {
        String msg = "-1";
        String port = "25";
        //在此处配置作为发送方的邮件信息
        String filename = "config.properties";
        Properties props = new Properties();
        InputStream in = new FileInputStream(filename);
        props.load(in);
        String host = props.getProperty("email.host");
        String username = props.getProperty("email.username");
        String password = props.getProperty("email.password");

        if (!recipients.equals("")) {
            Email email = new Email(recipients, subject, content);
            email.setUsername(username);
            email.setPassword(password);
            email.setHost(host);
            email.setPort(port);
            EmailUtils.sendEmail(email);
            msg = "success";
        }
        return msg;
    }

    public static void main(String[] args) throws Exception {
        System.out.println(sendEmail("xxxxxxx@126.com", "test", "hello,world"));
    }
}

package itext;

import java.io.FileInputStream;
import java.util.Properties;

/**
 * Created on 2017/9/8
 * Author: youxingyang.
 */
public class Email {
    private String to;//收件人

    private String subject;//主题

    private String content;//内容

    private String username;//发件人

    private String password;//密码

    private String port;//SMTP

    private String host;

    private String cc;

    private String bcc;

    private String[] files;

    protected void init() {
        String filename = "config.properties";
        Properties props = new Properties();
        try {
            props.load(new FileInputStream(filename));

            String username = props.get("email.username").toString();
            String password = props.get("email.password").toString();

            this.username = username;//Base64.decode(username);
            this.password = password;//Base64.decode(password);

            if(this.username.toLowerCase().contains("@qq.com") || this.username.toLowerCase().contains("@annoroad.com")){
                this.host = "smtp.exmail.qq.com";
            }else if(this.username.toLowerCase().contains("@163.com")){
                this.host = "smtp.163.com";
            }else if(this.username.toLowerCase().contains("@sina.com")){
                this.host = "smtp.sina.com";
            }else if(this.username.toLowerCase().contains("@139.com")){
                this.host = "smtp.139.com";
            }

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Email构造函数
     * @param to 收件人
     * @param subject 标题
     * @param content 内容
     * @param cc 抄送人
     * @param bcc 密送人
     * @param files 附件
     */
    public Email(String to, String subject, String content, String cc,
                 String bcc, String[] files) {
        this.to = to;
        this.subject = subject;
        this.content = content;
        this.cc = cc;
        this.bcc = bcc;
        this.files = files;
        init();
    }


    /**
     * Email构造函数
     * @param to 收件人
     * @param subject 标题
     * @param content 内容
     * @param cc 抄送人
     * @param files 附件
     */
    public Email(String to, String subject, String content, String cc,
                 String[] files) {
        this.to = to;
        this.subject = subject;
        this.content = content;
        this.cc = cc;
        this.files = files;
        init();
    }

    /**
     * Email构造函数
     * @param to 收件人
     * @param subject 标题
     * @param content 内容
     * @param files 附件
     */
    public Email(String to, String subject, String content, String[] files) {
        this.to = to;
        this.subject = subject;
        this.content = content;
        this.files = files;
        init();
    }

    /**
     * Email构造函数
     * @param to 收件人
     * @param subject 标题
     * @param content 内容
     * @param cc 抄送人
     * @param bcc 密送人
     */
    public Email(String to, String subject, String content, String cc,
                 String bcc) {
        this.to = to;
        this.subject = subject;
        this.content = content;
        this.cc = cc;
        this.bcc = bcc;
        init();
    }

    /**
     * Email构造函数
     * @param to 收件人
     * @param subject 标题
     * @param content 内容
     * @param cc 抄送人
     */
    public Email(String to, String subject, String content, String cc) {
        this.to = to;
        this.subject = subject;
        this.content = content;
        this.cc = cc;
        init();
    }

    /**
     * Email构造函数
     * @param to 收件人
     * @param subject 标题
     * @param content 内容
     */
    public Email(String to, String subject, String content) {
        this.to = to;
        this.subject = subject;
        this.content = content;
        init();
    }

    public String[] getFiles() {
        return files;
    }

    public void setFiles(String[] files) {
        this.files = files;
    }

    public String getCc() {
        return cc;
    }

    public void setCc(String cc) {
        this.cc = cc;
    }

    public String getBcc() {
        return bcc;
    }

    public void setBcc(String bcc) {
        this.bcc = bcc;
    }

    public String getHost() {
        return host;
    }

    public void setHost(String host) {
        this.host = host;
    }

    public String getPort() {
        return port;
    }

    public void setPort(String port) {
        this.port = port;
    }

    public String getTo() {
        return to;
    }

    public void setTo(String to) {
        this.to = to;
    }

    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 getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

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

import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.MessagingException;
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;

/**
 * Created on 2017/9/8
 * Author: youxingyang.
 */
public class EmailUtils {
    public static void sendEmail(Email email) throws Exception {
        Properties props = new Properties();
        props.put("mail.smtp.auth", "true");
        Session session = Session.getDefaultInstance(props);
        session.setDebug(true);

        MimeMessage message = new MimeMessage(session);
        message.setRecipients(Message.RecipientType.TO, email.getTo());
        message.setFrom(new InternetAddress(email.getUsername()));
        message.setSubject(email.getSubject());

        message.setRecipients(Message.RecipientType.TO,InternetAddress.parse(email.getTo()));//接收人
        if(email.getCc() != null && !email.getCc().equals(""))
            message.setRecipients(Message.RecipientType.CC,InternetAddress.parse(email.getCc()));//抄送人
        if(email.getBcc() != null && !email.getBcc().equals(""))
            message.setRecipients(Message.RecipientType.BCC,InternetAddress.parse(email.getBcc()));//密送人
        MimeMultipart mimeMuti = new MimeMultipart("mixed");
        if(email.getFiles() != null && email.getFiles().length > 0){
            for(String file : email.getFiles()){
                MimeBodyPart bodyPartAttch = createAttachMent(file);//附件
                mimeMuti.addBodyPart(bodyPartAttch);
            }
        }
        MimeBodyPart bodyPartContentAndPic = createContentAndPic(email.getContent());//文本内容
        mimeMuti.addBodyPart(bodyPartContentAndPic);
        message.setContent(mimeMuti);
        message.saveChanges();

        Transport transport = session.getTransport("smtp");
        transport.connect(email.getHost(), email.getUsername(), email.getPassword());
        transport.sendMessage(message, message.getAllRecipients());
    }

    //创建附件
    protected static MimeBodyPart createAttachMent(String path) throws MessagingException {
        MimeBodyPart mimeBodyPart = new MimeBodyPart();
        FileDataSource dataSource = new FileDataSource(new File(path));
        mimeBodyPart.setDataHandler(new DataHandler(dataSource));
        mimeBodyPart.setFileName(dataSource.getName());
        return mimeBodyPart;
    }

    //创建文本
    protected static MimeBodyPart createContentAndPic(String content) throws MessagingException, UnsupportedEncodingException {
        MimeMultipart mimeMutiPart = new MimeMultipart("related");
        //文本
        MimeBodyPart contentBodyPart = new MimeBodyPart();
        //img的src要和setHeader中设置的值一样
        contentBodyPart.setContent(content,"text/html;charset=gbk");
        mimeMutiPart.addBodyPart(contentBodyPart);
        //图片和文本结合
        MimeBodyPart allBodyPart = new MimeBodyPart();
        allBodyPart.setContent(mimeMutiPart);
        return allBodyPart;
    }
}

配置文件config.properties