java 实现邮件推送

Java实现邮件推送功能

一、引入依赖

 <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-email</artifactId>
            <version>1.4</version>
 </dependency>

二、邮件来源用户信息

private static Logger log = Log.getLogger();
private static ThreadPoolExecutor threadPool;
private static String emailServer;
private static String userName;
private static String password;
private static String emailEncoding;
private static String emailFrom;
private static String sysEmailFromName;
private static String encoding;
 
private static void initMail(Email mail) throws EmailException {
 mail.setHostName(emailServer);
 mail.setAuthentication(userName, password);
 mail.setCharset(emailEncoding);
 mail.setFrom(emailFrom, sysEmailFromName);
}

三、线程池异步

static {
 threadPool = new ThreadPoolExecutor(5, 10, 3L, TimeUnit.SECONDS, new ArrayBlockingQueue(50), new ThreadPoolExecutor.DiscardPolicy());
 //邮箱服务器地址
 emailServer = "smtp.163.com";
 //用户名
 userName = "****";
 //用户密码
 password = "****";
 //编码格式
 emailEncoding = "GBK";
 //邮件来源
 emailFrom = "*****.com.cn";
 //邮件来源用户名称
 sysEmailFromName = "****";
 //编码格式
 encoding = "UTF-8";
}
​

四、异步发送

 private static void sendMail(Email mail) {
       threadPool.execute(new Runnable() {
           @Override
           public void run() {
               try {
                   mail.send();
               } catch (EmailException var2) {
                   log.error("[邮件抄送失败]-", var2);
               }
           }
       });
   }

五 完整发送

import org.apache.commons.lang.StringUtils;
import org.apache.commons.mail.*;
import org.slf4j.Logger;
​
import javax.mail.internet.MimeUtility;
import java.io.File;
import java.io.UnsupportedEncodingException;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
​
/**
 * 邮件发送工具
 */
public class MailUtil {
​
 private static Logger log = Log.getLogger();
    private static ThreadPoolExecutor threadPool;
    private static String emailServer;
    private static String userName;
    private static String password;
    private static String emailEncoding;
    private static String emailFrom;
    private static String sysEmailFromName;
    private static String encoding;
    
    private static void initMail(Email mail) throws EmailException {
        mail.setHostName(emailServer);
        mail.setAuthentication(userName, password);
        mail.setCharset(emailEncoding);
        mail.setFrom(emailFrom, sysEmailFromName);
   }
    
    static {
 threadPool = new ThreadPoolExecutor(5, 10, 3L, TimeUnit.SECONDS, 
                                        new ArrayBlockingQueue(50), 
                                        new ThreadPoolExecutor.DiscardPolicy());
 //邮箱服务器地址
 emailServer = "mailha.sinosafe.local";
 //用户名
 userName = "****";
 //用户密码
 password = "****";
 //编码格式
 emailEncoding = "GBK";
 //邮件来源
 emailFrom = "*****.com.cn";
 //邮件来源用户名称
 sysEmailFromName = "****";
 //编码格式
 encoding = "UTF-8";
 }
    
     /**
     * 异步发送邮件
     */
    private static void sendMail(Email mail) {
        threadPool.execute(new Runnable() {
            @Override
            public void run() {
                try {
                    mail.send();
               } catch (EmailException var2) {
                    log.error("[邮件抄送失败]-", var2);
               }
           }
       });
   }
    
    /**
    * 抄送郵件
    */
    public static void bccHtmlEmail(String subject, String html, List<String> users) throws Exception {
        HtmlEmail email = new HtmlEmail();
        initMail(email);
        email.setSubject(subject);
        for (String r : users){
            email.addBcc(r);
  }
        email.setHtmlMsg(html);
        email.setTextMsg("Your email client does not support HTML messages");
        sendMail(email);
   }
    
    /**
    * 单附件邮件
    */
    public static void sendEmailWithFile(String subject, String html, List<String> receivers, 
                                         File file) throws UnsupportedEncodingException {
        //附件
        EmailAttachment att1 = new EmailAttachment();
        att1.setPath(file.getPath());
        att1.setDisposition(EmailAttachment.ATTACHMENT);
        att1.setDescription("attachemnt description gril 中文");
        att1.setName(MimeUtility.encodeText(file.getName()));
        MultiPartEmail email = new MultiPartEmail();
        email.setHostName(emailServer);
        email.setAuthentication(userName, password);
        email.setCharset(emailEncoding);
        email.setSubject(subject);
        try {
            email.setMsg(html);
            for (String user : receivers) {
                email.addTo(user);
           }
            email.setFrom(emailFrom, sysEmailFromName); 
            email.attach(att1);  
            email.send();
       } catch (EmailException e1) {
            e1.printStackTrace();
       }
   }
    
    public static void sendEmailMultifile(String subject, String html, List<String> receivers,
                                          List<File> files){
        HtmlEmail email = new HtmlEmail();
        email.setHostName(emailServer);
        email.setAuthentication(userName, password);
        email.setCharset(emailEncoding);
        email.setSubject(subject);
        try {
            for (String user : receivers) {
                email.addTo(user);
           }
            email.setFrom(emailFrom, sysEmailFromName);
            email.setHtmlMsg(html);
            //附件
            for(File f : files){
                EmailAttachment att1 = new EmailAttachment();
                att1.setPath(f.getPath());
                att1.setDisposition(EmailAttachment.ATTACHMENT);
                att1.setDescription("attachemnt description gril 中文"); //附件描述
                //防止附件名乱码
                att1.setName(MimeUtility.encodeText(f.getName())); 
                email.attach(att1);
           }
            email.send();
       }catch (EmailException | UnsupportedEncodingException e1) {
            e1.printStackTrace();
       }
   }
    
    /**
    * 抄送郵件
    */
   public static void ccHtmlEmail(String subject, String html, String receiver, String cc) 
            throws Exception {
        ccHtmlEmail(subject, html, Arrays.asList(receiver.split(",")), cc, null);
   }
​
    /**
    * 抄送郵件带附件
    */
    public static void ccHtmlEmail(String subject, String html, String receiver, String cc, File file) 
        throws Exception {
        ccHtmlEmail(subject, html, Arrays.asList(receiver.split(",")), cc, file);
   }
​
}

五、总结

Java实现邮件发送，可以异步使用线程池批量发送多人，减小服务器的压力，可以发送单页面（可以是html语言写的页面），也可以单附件或者多附件发送邮件。