JavaMail发送邮件功能

1. Send mail using GMAIL

（转载自）http://www.java2s.com/Code/Java/Network-Protocol/SendmailusingGMAIL.htm

/**
* Copyright 2010 Commerce4J.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0 *
*  Unless required by applicable law or agreed to in writing, software
*  distributed under the License is distributed on an "AS IS" BASIS,
*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*  See the License for the specific language governing permissions and
*  limitations under the License.
*/
//package com.commerce4j.storefront.utils.gmail;

import java.util.Properties;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

/**
* Sendmail using GMAIL implementation.
*
* @author carlos.quijano
* @version $Revision$ $Date$
*/
public class SendMailImpl {

private static final String SMTP_HOST_NAME = "smtp.gmail.com";
private static final String SMTP_PORT = "465";
private static final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";

private String username;
private String password;

/* (non-Javadoc)
* @see com.commerce4j.storefront.utils.SendMail#sendMessage(java.lang.String, java.lang.String[], java.lang.String, java.lang.String)
*/
public void sendMessage(
String from, String recipients[],
String subject, String message
) throws MessagingException {

// Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
boolean debug = true;

Properties props = new Properties();
props.put("mail.smtp.host", SMTP_HOST_NAME);
props.put("mail.smtp.auth", "true");
props.put("mail.debug", "true");
props.put("mail.smtp.port", SMTP_PORT);
props.put("mail.smtp.socketFactory.port", SMTP_PORT);
props.put("mail.smtp.socketFactory.class", SSL_FACTORY);
props.put("mail.smtp.socketFactory.fallback", "false");

Session session = Session.getDefaultInstance(props, new javax.mail.Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(username, password);
}
});

session.setDebug(debug);
Message msg = new MimeMessage(session);
InternetAddress addressFrom = new InternetAddress(from);
msg.setFrom(addressFrom);

InternetAddress[] addressTo = new InternetAddress[recipients.length];
for (int i = 0; i < recipients.length; i++) {
addressTo[i] = new InternetAddress(recipients[i]);
}
msg.setRecipients(Message.RecipientType.TO, addressTo);

// Setting the Subject and Content Type
msg.setSubject(subject);
msg.setContent(message, "text/html");
Transport.send(msg);
}

/**
* JavaBean Getter, Gets the username current value.
* @return The username current value.
*/
public String getUsername() {
return username;
}

/**
* JavaBean Setter, Sets value to username.
* @param username The value of username to set.
*/
public void setUsername(String username) {
this.username = username;
}

/**
* JavaBean Getter, Gets the password current value.
* @return The password current value.
*/
public String getPassword() {
return password;
}

/**
* JavaBean Setter, Sets value to password.
* @param password The value of password to set.
*/
public void setPassword(String password) {
this.password = password;
}

}

2. 更详细的处理

（转载自）http://my.oschina.net/u/1246663/blog/166883

package com.hsp.service;
//该程序是javamail，用于发送邮件的
import java.util.*;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.BodyPart;
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 SendMail {

private MimeMessage mimeMsg;      //MIME邮件对象

private Session session;          //邮件会话对象
private Properties props;         //系统属性
private boolean needAuth=false;   //smtp是否需要认证

private String username="";       //smtp认证用户名和密码
private String password="";

private Multipart mp;             //Multipart对象，邮件内容、标题、附件等内容

public SendMail(){
//setSmtpHost(getConfig.mailHost); //如果没有指定有加你服务
createMimeMessage();
}

public SendMail(String smtp){
setSmtpHost(smtp);
createMimeMessage();
}

public void setSmtpHost(String hostName){
System.out.println("设置系统属性：mail.stmp.host="+hostName);
if(props==null) props=System.getProperties();                 //获取系统属性
props.put("mail.smtp.host",hostName);                         //设置SMTP主机
}

public boolean createMimeMessage(){
try{
System.out.println("准备获取邮件会话对象！");
session=Session.getDefaultInstance(props,null);
}catch(Exception e){
System.err.println("获取邮件会话对象时发生错误！"+e);
return false;
}
System.out.println("准备创建MIME邮件对象");
try{
mimeMsg =new MimeMessage(session);//创建MIME邮件对象
mp=new MimeMultipart();

return true;
}catch(Exception e){
System.err.println("创建MIME邮件对象失败"+e);
return false;
}
}

public void setNeedAnth(boolean need){
System.out.println("设置smtp身份认证：mail.smtp.auth="+need);
if(props==null) props=System.getProperties();

if(need){
props.put("mail.smtp.auth", "true");
}else{
props.put("mail.smtp.auth", false);
}
}

public void setNamePass(String name,String pass){
username=name;
password=pass;
}

public boolean setSubject(String mailSubject){
System.out.print("设置邮件主题");
try{
mimeMsg.setSubject(mailSubject);
return true;
}catch(Exception e){
System.err.println("设置邮件主题发生错误");
return false;
}
}

public boolean setBody(String mailBody){
try{
BodyPart bp=new MimeBodyPart();
bp.setContent("<meta http-equiv=Content-Type content=text/html; charset=gb2312/>"+mailBody,"text/html;charset=gb2312");
mp.addBodyPart(bp);

return true;
}catch(Exception e){
System.err.println("设置邮件正文是发生错误！"+e);
return false;
}
}

public boolean addFileAffix(String filename){
System.out.println("增加邮件附件："+filename);
try{

BodyPart bp=new MimeBodyPart();
FileDataSource fileds=new FileDataSource(filename);
bp.setDataHandler(new DataHandler(fileds));
bp.setFileName(fileds.getName());
mp.addBodyPart(bp);
return true;
}catch(Exception e){
System.err.println("增加邮件附件"+filename+"发生错误："+e);
return false;
}
}

public boolean setForm(String from){
System.out.println("设置发信人");
try{
mimeMsg.setFrom(new InternetAddress(from));
return true;
}catch(Exception e){
return false;
}
}

public boolean setTo(String to){
if(to==null) return false;
try{
mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));
return true;
}catch(Exception e){
return false;
}
}

public boolean setCopyTp(String copyto){
if(copyto==null) return false;
try{
mimeMsg.setRecipients(Message.RecipientType.CC, (Address[])InternetAddress.parse(copyto));
return true;
}catch(Exception e){
return false;
}
}

public boolean sendout(){
try{
mimeMsg.setContent(mp);
//mimeMsg.saveChanges();

System.out.println("正在发送邮件....");

Session mailSession=Session.getInstance(props,null);
Transport transport=mailSession.getTransport("smtp");
transport.connect((String)props.get("mail.smtp.host"),username,password);
transport.sendMessage(mimeMsg, mimeMsg.getRecipients(Message.RecipientType.TO));

System.out.println("发送邮件成功！");
transport.close();

return true;
}catch(Exception e){
System.out.println("邮件发送失败！"+e);
return false;
}
}

public static void sendToSomebody(String mailbody,String title,String toEmail){
//发送的邮件内容
//String mailbody=mailbody;

//指明让那个smtp转发
SendMail themail=new SendMail("smtp.163.com");

//校验身份
themail.setNeedAnth(true);

//邮件标题
if(themail.setSubject(title)==false) return;
//将要发送的内容放入邮件体
if(themail.setBody(mailbody)==false) return;

//发往哪里
if(themail.setTo(toEmail)==false) return;
//谁发送的
if(themail.setForm("mingliang88820@163.com")==false) return;

//发送附件
//if(themail.addFileAffix("xxx.xx")==false) return;
//将在163网站上的邮件用户名和密码放入邮件体
themail.setNamePass("mingliang88820", "15938968102");
//发送
if(themail.sendout()==false) return;
}
}