Java之邮件发送以及有效邮箱验证
一 邮件发送
maven直接在pom.xml引入
1 发送邮件第一步：设置发送邮件的邮箱
package com.apk.openUser.utils;
import java.util.List;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
public class MailUtil {
public Session getSession(String sender,String password){
Session session;
try {
Properties props = new Properties();
// 发送服务器需要身份验证
props.setProperty("mail.smtp.auth", "true");
// 设置邮件服务器主机名 ，我这里用的qq企业邮箱作为发件人的
props.setProperty("mail.host", "smtp.exmail.qq.com");
// 发送邮件协议名称
props.setProperty("mail.transport.protocol", "smtp");
// 设置环境信息
MyAuthenricator authenricator = new MyAuthenricator(sender,password);
session = Session.getInstance(props, authenricator);
} catch (Exception e) {
// TODO: handle exception
session = null;
}
return session;
}
/**
* 客户端程序自己实现Authenticator子类用于用户认证
*/
static class MyAuthenricator extends Authenticator{
String user=null;
String pass="";
public MyAuthenricator(String user,String pass){
this.user=user;
this.pass=pass;
}
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(user,pass);
}
}
/**
* 收件人邮箱格式校验
* @param receivers
* @return
*/
public Boolean compileEmail(List receivers){
String check = "^([a-z0-9A-Z]+[-|_|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
Pattern regex = Pattern.compile(check);
for(String receiver : receivers){
Matcher matcher = regex.matcher(receiver);
boolean isMatched = matcher.matches();
if(!isMatched) return false;
}
return true;
}
}
2 设置发送邮件的相关信息
package com.apk.openUser.utils;
import java.io.File;
import java.security.SecureRandom;
import java.util.Date;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message.RecipientType;
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;
import javax.mail.internet.MimeUtility;
public class MailSender {
private Session session;
/**
*
* @param sender 发送者邮箱
* @param receiver 收件人邮箱
* @param subject 邮件主题
* @param content 邮件内容
* @throws Exception
*/
public void send(String sender, String receiver, String subject, String content,String password) throws Exception {
//服务器认证
try{
System.out.println("sen:"+sender);
MailUtil mailUtil = new MailUtil();
session = mailUtil.getSession(sender, password);
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(sender));
System.out.println(message.getFrom());
message.setRecipient(RecipientType.TO, new InternetAddress(receiver));
message.setSentDate(new Date());
message.setSubject(subject);
message.setContent(content, "text/html;charset=UTF-8");
Transport.send(message);
}catch(Exception e) {
e.printStackTrace();
}
}
//发送含有附件的邮件
public void send(String sender, String receiver, String subject, String content,String password,File file,String name) throws Exception {
//服务器认证
MailUtil mailUtil = new MailUtil();
session = mailUtil.getSession(sender, password);
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(sender));
message.setRecipient(RecipientType.TO, new InternetAddress(receiver));
message.setSentDate(new Date());
message.setSubject(subject);
//添加邮件正文
BodyPart contentPart = new MimeBodyPart();
// 消息
//contentPart.setText(content);
contentPart.setContent(content, "text/html;charset=UTF-8");
// 创建多重消息
Multipart multipart = new MimeMultipart();
// 设置文本消息部分
multipart.addBodyPart(contentPart);
//附件
contentPart = new MimeBodyPart();
DataSource source = new FileDataSource(file);
contentPart.setDataHandler(new DataHandler(source));
contentPart.setFileName(MimeUtility.encodeWord(name));//保证发送名称含中文不乱码
multipart.addBodyPart(contentPart);
// 发送完整消息
message.setContent(multipart);
Transport.send(message,message.getAllRecipients());
System.out.println("邮件发送成功!");
}
public static void main(String[] args) throws Exception{
String a = "[email protected]";
String b = "[email protected]";
String c = "fasong";
String d = "账户名/username:初始密码/password:66666666
";
String e = "123456";
String sp = "D:\\upload\\kai hu.docx";
File file = new File(sp);
String name = "kai hu.docx";
//new MailSender().send(a,b,c,d,e,file,name);
SecureRandom s = SecureRandom.getInstance("SHA1PRNG");
System.out.println(s.nextLong());
}
}
二 验证邮箱是否为有效正在使用的邮箱
pom.xml里面加入
验证类如下：
package com.apk.openUser.utils;
import java.io.IOException;
import org.apache.commons.net.smtp.SMTPClient;
import org.apache.commons.net.smtp.SMTPReply;
import org.xbill.DNS.Lookup;
import org.xbill.DNS.MXRecord;
import org.xbill.DNS.Record;
import org.xbill.DNS.Type;
public class CheckEmailUtil {
public static final String SENDER_EMAIL = "[email protected]";//"[email protected]";
public static final String SENDER_EMAIL_SERVER = SENDER_EMAIL.split("@")[1];//"domain.com";
/**
*
* @param email The recipient's email address, it need to be validate if it is real exists or doesn't exists.
* @return True if email is real exists, false if not.
*/
public boolean checkEmailMethod(String email) {
if (!email.matches("[\\w\\.\\-]+@([\\w\\-]+\\.)+[\\w\\-]+")) {
System.err.println("Format error");
return false;
}
String log = "";
String host = "";
String hostName = email.split("@")[1];
Record[] result = null;
SMTPClient client = new SMTPClient();
client.setConnectTimeout(8000); //设置连接超时时间,有些服务器比较慢
try {
// 查找MX记录
Lookup lookup = new Lookup(hostName, Type.MX);
lookup.run();
if (lookup.getResult() != Lookup.SUCCESSFUL) {
log += "找不到MX记录\n";
return false;
} else {
result = lookup.getAnswers();
}
/*
if(result.length > 1) { // 优先级排序
List arrRecords = new ArrayList();
Collections.addAll(arrRecords, result);
Collections.sort(arrRecords, new Comparator() {
public int compare(Record o1, Record o2) {
return new CompareToBuilder().append(((MXRecord)o1).getPriority(), ((MXRecord)o2).getPriority()).toComparison();
}
});
host = ((MXRecord)arrRecords.get(0)).getTarget().toString();
}
*
*/
// 连接到邮箱服务器
for (int i = 0; i < result.length; i++) {
System.out.println(result[i].getAdditionalName().toString());
System.out.println(((MXRecord)result[i]).getPriority());
}
int count=0;
// String tempLog ="";
for (int i = 0; i < result.length; i++) {
log="";
host = result[i].getAdditionalName().toString();
try{
client.connect(host); //连接到接收邮箱地址的邮箱服务器
}catch(Exception e){ //捕捉连接超时的抛出的异常
count++;
if(count>=result.length){ //如果由MX得到的result服务器都连接不上，则认定email无效
log +="Connect mail server timeout...\n";
return false;
}
}
if (!SMTPReply.isPositiveCompletion(client.getReplyCode())) { //服务器通信不成功
client.disconnect();
continue;
} else {
log += "MX record about " + hostName + " exists.\n";
log += "Connection succeeded to " + host + "\n";
log += client.getReplyString();
// HELO <$SENDER_EMAIL_SERVER> //domain.com
try{
client.login(SENDER_EMAIL_SERVER); //这一步可能会出现空指针异常
}catch(Exception e){
return false;
}
log += ">HELO "+SENDER_EMAIL_SERVER+"\n";
log += "=" + client.getReplyString();
client.setSender(SENDER_EMAIL);
if(client.getReplyCode()!=250){ //为解决hotmail有的MX可能出现=550 OU-001 (SNT004-MC1F43) Unfortunately, messages from 116.246.2.245 weren't sent.
client.disconnect();
continue; //把client.login 和client.setSender放在循环体内，这样所有的如果某mx不行就换其他mx，但这样会对无效的邮箱进行所有mx遍历，耗时
}
log += ">MAIL FROM: <"+SENDER_EMAIL+">\n";
log += "=" + client.getReplyString();
// RCPT TO: <$email>
try{
client.addRecipient(email);
}catch(Exception e){
return false;
}
log += ">RCPT TO: <" + email + ">\n";
log += "=" + client.getReplyString();
//最后从收件邮箱服务器返回true，说明服务器中能够找到此收件地址，邮箱有效
if (250 == client.getReplyCode()) {
return true;
}
client.disconnect();
}
}
// log+=tempLog;
// log += ">MAIL FROM: <"+SENDER_EMAIL+">\n";
// log += "=" + client.getReplyString();
//
// // RCPT TO: <$email>
// try{
// client.addRecipient(email);
// }catch(Exception e){
// return false;
// }
// log += ">RCPT TO: <" + email + ">\n";
// log += "=" + client.getReplyString();
//
// //最后从收件邮箱服务器返回true，说明服务器中能够找到此收件地址，邮箱有效
// if (250 == client.getReplyCode()) {
// return true;
// }
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
client.disconnect();
} catch (IOException e) {
}
// print log
System.out.println(log);
}
return false;
}
/**
* This method is more accurate than checkEmailMethod(String email);
*
* @param email The recipient's email address, it need to be validate if it is real exists or doesn't exists.
* @return True if email is real exists, false if not.
*/
public boolean checkEmail(String email){
if(email.split("@")[1].equals("qq.com")){
if( checkEmailMethod(email) && checkEmailMethod(email) && checkEmailMethod(email)){
return true;
}else{
return false;
}
}
return checkEmailMethod(email);
}
public static void main(String[] args) {
CheckEmailUtil ce = new CheckEmailUtil();
if(ce.checkEmail("[email protected]")){
System.out.println("true");
}else{
System.out.println("false");
}
}
}