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/*
在java版经常看到有人问如何用javamail发送邮件？如何接收邮件？如何访问多个文件夹等。问题零散，而历史的回复早已经淹没在问题的海洋之中。
本人之前所做过一个java项目，其中包含有webmail功能，当初为用java实现而对javamail摸索了一段时间，总算有点收获。看到论坛中的经常有此方面的问题，因此把我的一些经验帖出来，希望对大家有些帮助。
此篇仅介绍用javamail实现发送邮件功能，其中涉及smtp认证，邮件附件发送，及html内容邮件等。
其它有关多邮箱的实现，接收pop3邮件及imap等内容，将在后续文章中介绍。
如下程序需要：javamail，jaf包，j2ee.jar包含了上述两个包，建议大家安装j2sdkee或直接拷贝j2ee.jar，将其添加到jbuilder的library中，或系统classpath中
*/
package com.me.util.mail;
/**
* @author zhangkun aistill@msn.com
* @version 1.0
*/
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.date;
import javax.activation.*;
import java.io.*;
import com.me.util.*;
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,附件等内容均添加到其中后再生成mimemessage对象
/**
*
*/
public sendmail() {
setsmtphost(getconfig.mailhost);//如果没有指定邮件服务器,就从getconfig类中获取
createmimemessage();
}
public sendmail(string smtp){
setsmtphost(smtp);
createmimemessage();
}
/**
* @param hostname string
*/
public void setsmtphost(string hostname) {
system.out.println("设置系统属性：mail.smtp.host = "+hostname);
if(props == null)props = system.getproperties(); //获得系统属性对象
props.put("mail.smtp.host",hostname); //设置smtp主机
}
/**
* @return boolean
*/
public boolean createmimemessage()
{
try{
system.out.println("准备获取邮件会话对象！");
session = session.getdefaultinstance(props,null); //获得邮件会话对象
}
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;
}
}
/**
* @param need boolean
*/
public void setneedauth(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");
}
}
/**
* @param name string
* @param pass string
*/
public void setnamepass(string name,string pass) {
username = name;
password = pass;
}
/**
* @param mailsubject string
* @return boolean
*/
public boolean setsubject(string mailsubject) {
system.out.println("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;
}
}
/**
* @param mailbody string
*/
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("设置邮件正文时发生错误！"+e);
return false;
}
}
/**
* @param name string
* @param pass string
*/
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;
}
}
/**
* @param name string
* @param pass string
*/
public boolean setfrom(string from) {
system.out.println("设置发信人！");
try{
mimemsg.setfrom(new internetaddress(from)); //设置发信人
return true;
}
catch(exception e)
{ return false; }
}
/**
* @param name string
* @param pass string
*/
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; }
}
/**
* @param name string
* @param pass string
*/
public boolean setcopyto(string copyto)
{
if(copyto == null)return false;
try{
mimemsg.setrecipients(message.recipienttype.cc,(address[])internetaddress.parse(copyto));
return true;
}
catch(exception e)
{ return false; }
}
/**
* @param name string
* @param pass string
*/
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));
//transport.send(mimemsg);
system.out.println("发送邮件成功！");
transport.close();
return true;
}
catch(exception e)
{
system.err.println("邮件发送失败！"+e);
return false;
}
}
/**
* just do it as this
*/
public static void main(string[] args) {
string mailbody = "<meta http-equiv=content-type content=text/html; charset=gb2312>"+
"<div align=center><a href=http://www.csdn.net> csdn </a></div>";
sendmail themail = new sendmail("smtp.msn.com");
themail.setneedauth(true);
if(themail.setsubject("标题") == false) return;
if(themail.setbody(mailbody) == false) return;
if(themail.setto("gates@msn.com") == false) return;
if(themail.setfrom("bill@msn.com") == false) return;
if(themail.addfileaffix("c:\\boot.ini") == false) return;
themail.setnamepass("user","password");
if(themail.sendout() == false) return;
}
}
