java中利用mail.jar发送email

1，下载activation.jar和mail.jar包，可以到sun的官网上下载不过速度比较慢，我是在http://download.csdn.net/source/640980上下载的，没有版本说明，不过一般的要求应该是能够满足的
下面开始编写发送email程序：
<1>利用Properties设置一些基本的配置，比如

//设置一些基本属性
property.put(“mail.smtp.host”, SMTP_HOST);
property.put(“mail.smtp.port”, SMTP_PORT);
property.put(“mail.smtp.protocol” , SMTP_PROTOCOL);
property.put(“mail.smtp.auth”,SMTP_AUTH);

<2>自己编写一个认证类，继承自抽象类Authenticator，并实现getPasswordAuthentication方法，如下：

class MyAuthenticator extends Authenticator
{
private String user;
private String password;
public MyAuthenticator(String user,String password)
{
this.user = user;
this.password = password;
}
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication(user,password);
}
}
其中user和password是正常登陆邮箱时属性的用户名和密码的验证信息
<3>获得发送邮件的会话

MyAuthenticator myauth = new MyAuthenticator(AUTH_USER,AUTH_PASSWORD);
//获得发送邮件的会话
Session mailSession = Session.getDefaultInstance(property,myauth);
<4>生成所要发送的message,包括目的地址，发送地址，title,content

//生成发送的消息
Message message = new MimeMessage(mailSession);
try{
//形成发送的mail地址
InternetAddress fromAddress = new InternetAddress(FROM_ADDRESS);
message.setFrom(fromAddress);
InternetAddress toAddress = new InternetAddress(to);
//加入发送消息的目的地址addRecipients()两个重载函数
message.addRecipient(Message.RecipientType.TO, toAddress);
//设置消息题
message.setSubject(title);
//设置消息主题
message.setText(content);
//保存
message.saveChanges();
}
<5>发送email

//发送mail
try
{
Transport.send(message, message.getRecipients(Message.RecipientType.TO));
}
总的来说，发送email的过程是：生成会话包括认证信息和配置信息->message消息->发送->结束。
具体的API请参看官方手册
源程序如下

package org.solucking.smf.util;
import java.util.Date;
import java.util.Properties;
import java.util.List;
import java.util.ArrayList;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.SendFailedException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.AddressException;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
public class SendMail {
public static String SMTP_HOST = “smtp.163.com”;
public static String SMTP_PORT = “25″;
public static String SMTP_PROTOCOL = “SMTP”;
public static String SMTP_AUTH = “true”;
public static String AUTH_USER = “*****”;
public static String AUTH_PASSWORD = “****”;
public static String FROM_ADDRESS = “*****@163.com”;
/**
* 发送email,目的地址为一个
* @param to 目的email地址
* @param title email的标题
* @param content email的内容
* @return 返回是否发送成功
*/
public static boolean send(String to,String title,String content)
{
boolean isSuccess = true;
if( to == null || title == null || content == null)return false;
Properties property = new Properties();
//设置一些基本属性
property.put(“mail.smtp.host”, SMTP_HOST);
property.put(“mail.smtp.port”, SMTP_PORT);
property.put(“mail.smtp.protocol” , SMTP_PROTOCOL);
property.put(“mail.smtp.auth”,SMTP_AUTH);
MyAuthenticator myauth = new MyAuthenticator(AUTH_USER,AUTH_PASSWORD);
//获得发送邮件的会话
Session mailSession = Session.getDefaultInstance(property,myauth);
//生成发送的消息
Message message = new MimeMessage(mailSession);
try{
//形成发送的mail地址
InternetAddress fromAddress = new InternetAddress(FROM_ADDRESS);
message.setFrom(fromAddress);
InternetAddress toAddress = new InternetAddress(to);
//加入发送消息的目的地址addRecipients()两个重载函数
message.addRecipient(Message.RecipientType.TO, toAddress);
//设置消息题
message.setSubject(title);
//设置消息主题
message.setText(content);
//保存
message.saveChanges();
}
catch(Exception e)
{
isSuccess = false;
System.out.println(e.getMessage());
}
//发送mail
try
{
Transport.send(message, message.getRecipients(Message.RecipientType.TO));
}
catch(Exception e)
{
isSuccess = false;
System.out.println(e.getMessage());
}
return isSuccess;
}
/**
* 发送email,目的地址为一组
* @param toList 一组email地址
* @param title email的标题
* @param content email的内容
* @return boolean 返回是否成功
*/
public static boolean send(List toList,String title,String content)
{
boolean isSuccess = true;
if( toList == null || title == null || content == null || toList.size() == 0 )return false;
Properties property = new Properties();
//设置一些基本属性
property.put(“mail.smtp.host”, SMTP_HOST);
property.put(“mail.smtp.port”, SMTP_PORT);
property.put(“mail.smtp.protocol” , SMTP_PROTOCOL);
property.put(“mail.smtp.auth”,SMTP_AUTH);
MyAuthenticator myauth = new MyAuthenticator(AUTH_USER,AUTH_PASSWORD);
//获得发送邮件的会话
Session mailSession = Session.getDefaultInstance(property,myauth);
//生成发送的消息
Message message = new MimeMessage(mailSession);
try{
//形成发送的mail地址
InternetAddress fromAddress = new InternetAddress(FROM_ADDRESS);
message.setFrom(fromAddress);
for(String to:toList)
{
InternetAddress toAddress = new InternetAddress(to);
//加入发送消息的目的地址addRecipients()两个重载函数
message.addRecipient(Message.RecipientType.TO, toAddress);
}
//设置消息题
message.setSubject(title);
//设置消息主题
message.setText(content);
//保存
message.saveChanges();
}
catch(Exception e)
{
isSuccess = false;
System.out.println(e.getMessage());
}
//发送mail
try
{
Transport.send(message, message.getRecipients(Message.RecipientType.TO));
}
catch(Exception e)
{
isSuccess = false;
System.out.println(e.getMessage());
}
return isSuccess;
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO
String to = “*****@163.com”;
String title = “email 测试程序”;
String content = “我测试用得，不要回复呀。”;
List toList = new ArrayList();
toList.add(to);
toList.add(“[e-mail]”);
boolean res = SendMail.send(toList, title, content);
if( res == true )System.out.println(“发送成功”);

}
}
class MyAuthenticator extends Authenticator
{
private String user;
private String password;
public MyAuthenticator(String user,String password)
{
this.user = user;
this.password = password;
}
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication(user,password);
}
}