java的email

1. java里如何判斷Email是否發送成功

package com.liuns.mail.test;

import java.util.Date;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message.RecipientType;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
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 MailTest {
//發送的郵箱 內部代碼只適用qq郵箱
private static final String USER = "[email protected]";

//授權密碼 通過QQ郵箱設置->賬戶->POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服務->開啟POP3/SMTP服務獲取
private static final String PWD = "xxx";
private String[] to;
private String[] cc;//抄送
private String[] bcc;//密送
private String[] fileList;//附件
private String subject;//主題
private String content;//內容，可以用html語言寫
public void sendMessage() throws Exception {
// 配置發送郵件的環境屬性
final Properties props = new Properties();
//下面兩段代碼是設置ssl和埠，不設置發送不出去。
props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
//props.setProperty("mail.smtp.port", "465");
props.setProperty("mail.smtp.socketFactory.port", "465");
// 表示SMTP發送郵件，需要進行身份驗證
props.setProperty("mail.transport.protocol", "smtp");// 設置傳輸協議
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.host", "smtp.qq.com");//QQ郵箱的伺服器 如果是企業郵箱或者其他郵箱得更換該伺服器地址
// 發件人的賬號
props.put("mail.user", USER);
// 訪問SMTP服務時需要提供的密碼
props.put("mail.password", PWD);

// 構建授權信息，用於進行SMTP進行身份驗證
Authenticator authenticator = new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
// 用戶名、密碼
String userName = props.getProperty("mail.user");
String password = props.getProperty("mail.password");
return new PasswordAuthentication(userName, password);
}
};
// 使用環境屬性和授權信息，創建郵件會話
Session mailSession = Session.getInstance(props, authenticator);
// 創建郵件消息
MimeMessage message = new MimeMessage(mailSession);
BodyPart messageBodyPart = new MimeBodyPart();
Multipart multipart = new MimeMultipart();
// 設置發件人
InternetAddress form = new InternetAddress(
props.getProperty("mail.user"));
message.setFrom(form);
//發送
if (to != null) {
String toList = getMailList(to);
InternetAddress[] iaToList = new InternetAddress().parse(toList);
message.setRecipients(RecipientType.TO, iaToList); // 收件人
}
//抄送
if (cc != null) {
String toListcc = getMailList(cc);
InternetAddress[] iaToListcc = new InternetAddress().parse(toListcc);
message.setRecipients(RecipientType.CC, iaToListcc); // 抄送人
}
//密送
if (bcc != null) {
String toListbcc = getMailList(bcc);
InternetAddress[] iaToListbcc = new InternetAddress().parse(toListbcc);
message.setRecipients(RecipientType.BCC, iaToListbcc); // 密送人
}
message.setSentDate(new Date()); // 發送日期 該日期可以隨意寫,你可以寫上昨天的日期（效果很特別,親測,有興趣可以試試）,或者抽象出來形成一個參數。
message.setSubject(subject); // 主題
message.setText(content); // 內容
//顯示以html格式的文本內容
messageBodyPart.setContent(content,"text/html;charset=utf-8");
multipart.addBodyPart(messageBodyPart);
//保存多個附件
if(fileList!=null){
addTach(fileList, multipart);
}
message.setContent(multipart);
// 發送郵件
Transport.send(message);
}

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

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

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

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

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

public void setFileList(String[] fileList) {
this.fileList = fileList;
}

private String getMailList(String[] mailArray) {
StringBuffer toList = new StringBuffer();
int length = mailArray.length;
if (mailArray != null && length < 2) {
toList.append(mailArray[0]);
} else {
for (int i = 0; i < length; i++) {
toList.append(mailArray[i]);
if (i != (length - 1)) {
toList.append(",");
}
}
}
return toList.toString();
}

//添加多個附件
public void addTach(String fileList[], Multipart multipart) throws Exception {
for (int index = 0; index < fileList.length; index++) {
MimeBodyPart mailArchieve = new MimeBodyPart();
FileDataSource fds = new FileDataSource(fileList[index]);
mailArchieve.setDataHandler(new DataHandler(fds));
mailArchieve.setFileName(MimeUtility.encodeText(fds.getName(),"UTF-8","B"));
multipart.addBodyPart(mailArchieve);
}
}

//以下是演示demo
public static void main(String args[]) {
MailTest mail = new MailTest();
mail.setSubject("java郵件");
mail.setContent("你好 這是第一個java 程序發送郵件");
//收件人 可以發給其他郵箱(163等) 下同
mail.setTo(new String[] {"[email protected]"});
//抄送
// mail.setCc(new String[] {"[email protected]","[email protected]"});
//密送
//mail.setBcc(new String[] {"[email protected]","[email protected]"});
//發送附件列表 可以寫絕對路徑 也可以寫相對路徑(起點是項目根目錄)
// mail.setFileList(new String[] {"D:\\aa.txt"});
//發送郵件
try {
mail.sendMessage();
System.out.println("發送郵件成功！");
} catch (Exception e) {
System.out.println("發送郵件失敗！");
e.printStackTrace();
}
}
}

2. java如何驗證一個email地址是否真實有效。

首先使用java提供的格式類判斷email是否格式有誤，然後使用開源框架，驗證郵箱是否有用，示例如下：

publicstaticbooleancheckEmail(Stringemail){
if(!email.matches("[\w\.\-]+@([\w\-]+\.)+[\w\-]+")){
returnfalse;
}

Stringhost="";
StringhostName=email.split("@")[1];
Record[]result=null;
SMTPClientclient=newSMTPClient();

try{
//查找MX記錄
Lookuplookup=newLookup(hostName,Type.MX);
lookup.run();
if(lookup.getResult()!=Lookup.SUCCESSFUL){
returnfalse;
}else{
result=lookup.getAnswers();
}

//連接到郵箱伺服器
for(inti=0;i<result.length;i++){
host=result[i].getAdditionalName().toString();
client.connect(host);
if(!SMTPReply.isPositiveCompletion(client.getReplyCode())){
client.disconnect();
continue;
}else{
break;
}
}

//以下2項自己填寫快速的，有效的郵箱
client.login("163.com");
client.setSender("[email protected]");
client.addRecipient(email);
if(250==client.getReplyCode()){
returntrue;
}
}catch(Exceptione){
e.printStackTrace();
}finally{
try{
client.disconnect();
}catch(IOExceptione){
}
}
returnfalse;
}

需要的jar支持：commons-net-2.2.jar，dnsjava-2.1.1.jar