在整理网友的文章的时候，发现一个javamail的总结，特此谢谢the_east_key，并且公布给大家，希望对大家有做帮助，全文如下：
本文章对：
发送普通邮件，接受普通邮件
发送带有附件的邮件，接收带有附件的邮件
发送html形式的邮件，接受html形式的邮件
[b[发送带有图片的邮件[/b]等做了一个总结。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.jbcl.layout.*;
import javax.mail.*;
import java.util.*;
import javax.mail.internet.*;
import java.io.*;
import javax.activation.*;


public String host="smtp.163.com";
public String username="abcdefg";
public String password="abcdefg";
public String mail_head_name="this is head of this mail";
public String mail_head_value="this is head of this mail";
public String mail_to="xyz@163.com";
public String mail_from="abcdefg@163.com";
public String mail_subject="this is the subject of this test mail";
public String mail_body="this is the mail_body of this test mail";
//此段代码用来发送普通电子邮件
void jButton1_actionPerformed(ActionEvent e) {
try
{
Properties props = new Properties();//获取系统环境
Authenticator auth = new Email_Autherticator();//进行邮件服务器用户认证

props.put("mail.smtp.host",host);
props.put("mail.smtp.auth","true");
Session session = Session.getDefaultInstance(props,auth);
//设置session,和邮件服务器进行通讯。
MimeMessage message = new MimeMessage(session);
message.setContent("Hello","text/plain");//设置邮件格式
message.setSubject(mail_subject);//设置邮件主题
message.setText(mail_body);//设置邮件正文
message.setHeader(mail_head_name,mail_head_value);//设置邮件标题
message.setSentDate(new Date());//设置邮件发送日期

Address address = new InternetAddress(mail_from,"sunxiaoming");
message.setFrom(address); //设置邮件发送者的地址

//如果要对邮件发送者进行多个参数的设置，可以用以下语句
// Address address[] = {new InternetAddress("sunxm@oaklet.co.jp","sunxmatoaklet"),new InternetAddress("firstsxm@hotmail.com","sunxmathotmail")};
// message.addFrom(address);

Address toAddress = new InternetAddress(mail_to);//设置邮件接收方的地址
message.addRecipient(Message.RecipientType.TO,toAddress);
// Address ccAddress = new InternetAddress("firstsxm@hotmail.com");//设置邮件抄送者的地址
// message.addRecipient(Message.RecipientType.CC,ccAddress);


Transport.send(message);//发送邮件
/* // to get a specific instance from the session for your protocol.pass along the username and password
// (blank if unnecessary).send the message,and close the connection;
message.saveChanges();
Transport transport = session.getTransport("smtp");
transport.connect(host,username,password);
transport.sendMessage(message,message.getAllRecipients());
transport.close();
*/
System.out.println("send ok!");
}
catch(Exception ex)
{
System.out.println("faild"+ex);
}
}

//此段代码用来进行服务器对用户的认证
public class Email_Autherticator extends Authenticator
{
public Email_Autherticator()
{
super();
}
public PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication(username,password);
}
}
//该程序为接收邮件
void jButton2_actionPerformed(ActionEvent e) {
try
{
Properties props = System.getProperties(); //获取系统变量
Authenticator auth = new Email_Autherticator();
props.put("mail.smtp.host",host);
props.put("mail.smtp.auth","true");
Session session = Session.getDefaultInstance(props,auth); //建立session
Store store = session.getStore("pop3");
store.connect(host,username,password);

//After connecting to the Store,you can get a Folder,which must be opened before you can read messages from it:
Folder folder = store.getFolder("INBOX");//连接到Store后，取得一个文件夹，一般默认的是INDEX
folder.open(Folder.READ_WRITE);//READ_ONLY为打开方式
Message message[] = folder.getMessages();//从文件夹获取邮件信息

//可以用两种方式去获得邮件信息，getContent()用来获得邮件的主体信息。而WriteTo()可以用来获得邮件的全部信息，包括头部信息
// System.out.println(((MimeMessage)message).getContent());
for (int i=0,n=message.length;i<n;i++)
{

String out_from_person = ((InternetAddress)message[i].getFrom()[0]).getPersonal();
String out_from_address = ((InternetAddress)message[i].getFrom()[0]).getAddress();
System.out.println("From:"+out_from_person+" ");
System.out.println("Address:"+out_from_address+" ");

String out_subject = message[i].getSubject();
System.out.println("Subject:"+out_subject+" ");

//以下代码用来获得邮件的正文信息
Part messagePart = message[i];
Object out_content = messagePart.getContent();
if (out_content instanceof Multipart)
{
messagePart = ((Multipart)out_content).getBodyPart(0);
System.out.println("[ Multipart Message ]");
}
String out_content_type = messagePart.getContentType();
System.out.println("CONTENT:"+out_content_type);

if (out_content_type.startsWith("text/plain") &brvbar; &brvbar; out_content_type.startsWith("text/html"))
{
InputStream ipstm = messagePart.getInputStream();
BufferedReader bufreader = new BufferedReader(new InputStreamReader(ipstm));
String thisLine = bufreader.readLine();
while (thisLine != null)
{
System.out.println("thisLine: "+thisLine);
thisLine = bufreader.readLine();
}
}
System.out.println("----------------------------------------");
message[i].setFlag(Flags.Flag.DELETED,true);//最后删除服务器端的邮件
}
//DELETED,ANSWERED,DRAFT,FLAGGED,RECENT,SEEN,USER
folder.close(true);//true的话，彻底删除已经标记为DELETE的邮件，如果为false的话，就不删除
store.close();//关闭
}
catch(Exception ej2)
{
System.out.println(ej2);
}
}

void jButton4_actionPerformed(ActionEvent e) {
try
{//该程序为回复邮件
Properties props = System.getProperties(); //获取系统变量
Authenticator auth = new Email_Autherticator(); //取得?uFFFD衿魅现?
props.put("mail.smtp.host",host);
props.put("mail.smtp.auth","true");
Session session = Session.getDefaultInstance(props,auth); //建立session
Store store = session.getStore("pop3");
store.connect(host,username,password);

Folder folder = store.getFolder("INBOX");
folder.open(Folder.READ_WRITE);
Message message[] = folder.getMessages();

for (int i=0,n=message.length;i<n;i++)
{
// String out_from_person = ((InternetAddress)message[i].getFrom()[0]).getPersonal();//获取邮件发信人的署名

String out_from_address = ((InternetAddress)message[i].getFrom()[0]).getAddress();
System.out.println(out_from_address);

Message forward = new MimeMessage(session);
forward.setSubject("Fwd:"+message[i].getSubject());
forward.setFrom(new InternetAddress(mail_to));
forward.addRecipient(Message.RecipientType.TO,new InternetAddress(out_from_address));

BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText("Here you go with the original message: ");

Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);

messageBodyPart = new MimeBodyPart();
messageBodyPart.setDataHandler(message[i].getDataHandler());

multipart.addBodyPart(messageBodyPart);
forward.setContent(multipart);

Transport.send(forward);
message[i].setFlag(Flags.Flag.DELETED,true);//DELETED,ANSWERED,DRAFT,FLAGGED,RECENT,SEEN,USER
}
folder.close(true);
store.close();//关闭
}
catch(Exception ej2)
{
System.out.println(ej2);
}

}

void jButton5_actionPerformed(ActionEvent e) {
try
{
Properties props = new Properties();
Authenticator auth = new Email_Autherticator();

props.put("mail.smtp.host",host);
props.put("mail.smtp.auth","true");
Session session = Session.getDefaultInstance(props,auth);
MimeMessage message = new MimeMessage(session);
message.setContent("Hello","text/plain");
message.setSubject(mail_subject);
message.setText(mail_body);
message.setHeader(mail_head_name,mail_head_value);
message.setSentDate(new Date());
message.setFrom(new InternetAddress(mail_from,"sunxiaoming")); //to signal man
//原理：可以将邮件看成有多个部分组成的，如正文是一个部分，附件也是一个部分，所以用BodyPart来设置邮件的格式
message.addRecipient(Message.RecipientType.TO,new InternetAddress(mail_to));
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText("Pardon Ideas");
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);

messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource("./20020423/test.zip");//此处设置邮件的附件
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName("test.zip");
multipart.addBodyPart(messageBodyPart);
message.setContent(multipart);
Transport.send(message);
System.out.println("send ok!");
}
catch(Exception ex)
{
System.out.println("faild"+ex);
}

}
//此段代码用来发送带有附件的邮件
void jButton6_actionPerformed(ActionEvent e) {
try
{
Properties props = System.getProperties();
Authenticator auth = new Email_Autherticator();
props.put("mail.smtp.host",host);
props.put("mail.smtp.auth","true");
Session session = Session.getDefaultInstance(props,auth); //建立session
Store store = session.getStore("pop3");
store.connect(host,username,password);

//After connecting to the Store,you can get a Folder,which must be opened before you can read messages from it:
Folder folder = store.getFolder("INBOX");
folder.open(Folder.READ_WRITE);
Message message[] = folder.getMessages();

for (int i=0,n=message.length;i<n;i++)//可能有多个邮件，所以用循环
{
//获得邮件的部分信息，如头部信息，送信人的署名，送信人的邮件地址
String out_from_person = ((InternetAddress)message[i].getFrom()[0]).getPersonal();
String out_from_address = ((InternetAddress)message[i].getFrom()[0]).getAddress();
System.out.println("From:"+out_from_person+" ");
System.out.println("Address:"+out_from_address+" ");
String out_subject = message[i].getSubject();
System.out.println("Subject:"+out_subject+" ");

//以下代码用来获取邮件的主体信息
Part messagePart = message[i];
Object out_content = messagePart.getContent();
if (out_content instanceof Multipart)
{
messagePart = ((Multipart)out_content).getBodyPart(0);
System.out.println("[ Multipart Message ]");
}
String out_content_type = messagePart.getContentType();
System.out.println("CONTENT:"+out_content_type);

if (out_content_type.startsWith("text/plain") &brvbar; &brvbar; out_content_type.startsWith("text/html"))
{
InputStream ipstm = messagePart.getInputStream();
BufferedReader bufreader = new BufferedReader(new InputStreamReader(ipstm));
String thisLine = bufreader.readLine();
while (thisLine != null)
{
System.out.println("thisLine: "+thisLine);
thisLine = bufreader.readLine();
}
}
//获取附件
Multipart mp = (Multipart)message[i].getContent();
for (int j=0,m=mp.getCount();j<m;j++)
{
System.out.println("***"+m+"***");
Part part = mp.getBodyPart(j);
String disposition = part.getDisposition();
if ((disposition != null) && ((disposition.equals(part.ATTACHMENT)) &brvbar; &brvbar; (disposition.equals(part.INLINE))))
{

//以下代码将获得的附件保存到当前目录下，以part.getFileName()为文件名，也既是附件的名称。
File filename = new File(part.getFileName());
for (int k=0;filename.exists();k++)
{
filename = new File(part.getFileName()+k);
}
FileOutputStream myFileoutputstream = new FileOutputStream(filename);
int chunk = part.getSize();//获得附件的大小，不一定很准确。

byte [] buffer = new byte[chunk];
InputStream instream = part.getInputStream();
instream.read(buffer,0,chunk);
myFileoutputstream.write(buffer,0,chunk);
instream.close();
myFileoutputstream.close();
}
}
System.out.println("-----------------------------------------");
message[i].setFlag(Flags.Flag.DELETED,true)；
}
folder.close(true);
store.close();//关闭
}
catch(Exception ej2)
{
System.out.println(ej2);
}
}

//此段代码用来发送带有html信息的邮件
void jButton8_actionPerformed(ActionEvent e) {
try
{
Properties props = new Properties();
Authenticator auth = new Email_Autherticator();
props.put("mail.smtp.host",host);
props.put("mail.smtp.auth","true");
Session session = Session.getDefaultInstance(props,auth);
MimeMessage message = new MimeMessage(session);
//设置邮件正文
String htmltext="<h1>hello</h1>"+"<a href="http://www.sina.com.cn" target="_blank">click me please!</a>";
message.setContent(htmltext,"text/html");//text/plain设置邮件的格式因为是带有html文档的，所以用text/html格式

message.setSubject(mail_subject);
// message.setText(mail_body);在使用message.setContent()时候，好象不能用message.setText()
message.setHeader(mail_head_name,mail_head_value);
message.setSentDate(new Date());
Address address = new InternetAddress(mail_from,"sunxiaoming");
message.setFrom(address);
Address toAddress = new InternetAddress(mail_to);
message.addRecipient(Message.RecipientType.TO,toAddress);
Transport.send(message);
System.out.println("send ok!");
}
catch(Exception ex)
{
System.out.println("faild"+ex);
}

}

//此段代码用来发送带有图片的邮件
void jButton9_actionPerformed(ActionEvent e) {
try
{
String file = "./20020423/test.gif";
Properties props = new Properties();
Authenticator auth = new Email_Autherticator();

props.put("mail.smtp.host",host);
props.put("mail.smtp.auth","true");
Session session = Session.getDefaultInstance(props,auth);
MimeMessage message = new MimeMessage(session);

message.setSubject("Embedded Image");
Address address = new InternetAddress(mail_from,"sunxiaoming");
message.setFrom(address);
Address toAddress = new InternetAddress(mail_to);
message.addRecipient(Message.RecipientType.TO,toAddress);
message.setHeader(mail_head_name,mail_head_value);
message.setSentDate(new Date());

BodyPart messageBodyPart = new MimeBodyPart();
String htmlText = "<h1><hello></h1>"+"<img src="cid:memememe">";//加入图片
messageBodyPart.setContent(htmlText,"text/html");
//原理同发送附件一样，将邮件看成有多个部分组成的，先设置每一个部分，然后再全部将它们合起来即可。
//Create a related multi-part to combine the parts
MimeMultipart multipart = new MimeMultipart("related");
multipart.addBodyPart(messageBodyPart);

//Create part for the image
messageBodyPart = new MimeBodyPart();

//Fetch the image and associate to part
DataSource fds = new FileDataSource(file);
messageBodyPart.setDataHandler(new DataHandler(fds));
messageBodyPart.setHeader("Content-ID","memememe");

//Add part to multi-part
multipart.addBodyPart(messageBodyPart);

//Associate multi-part with message
message.setContent(multipart);

Transport.send(message);
System.out.println("send ok!");
}
catch(Exception ex)
{
System.out.println("faild"+ex);
}

}

//该程序用来接受带有html信息的邮件
void jButton7_actionPerformed(ActionEvent e) {
try
{
Properties props = System.getProperties();
Authenticator auth = new Email_Autherticator();
props.put("mail.smtp.host",host);
props.put("mail.smtp.auth","true");
Session session = Session.getDefaultInstance(props,auth);
Store store = session.getStore("pop3");
store.connect(host,username,password);

//After connecting to the Store,you can get a Folder,which must be opened before you can read messages from it:
Folder folder = store.getFolder("INBOX");
folder.open(Folder.READ_WRITE);
Message message[] = folder.getMessages();

for (int i=0,n=message.length;i<n;i++)
// for (int i=0,n=1;i<n;i++)//only one letter received from inbox //for debug
{
String out_from_person = ((InternetAddress)message[i].getFrom()[0]).getPersonal();
String out_from_address = ((InternetAddress)message[i].getFrom()[0]).getAddress();
System.out.println("From:"+out_from_person+" ");
System.out.println("Address:"+out_from_address+" ");

String out_subject = message[i].getSubject();
System.out.println("Subject:"+out_subject+" ");

//获取邮件的信息，并且对其每一部分进行操作
Part messagePart = message[i];
Object out_content = messagePart.getContent();
if (out_content instanceof Multipart)
{
messagePart = ((Multipart)out_content).getBodyPart(0);
System.out.println("[ Multipart Message ]");
}
String out_content_type = messagePart.getContentType();
System.out.println("CONTENT:"+out_content_type);

jEditorPane1.setText("");//将其显示在jEditorPanel上
jEditorPane1.setContentType("text/html");
jEditorPane1.setText((String)out_content);
jEditorPane1.setEditable(false);

/*
if (out_content_type.startsWith("text/plain") &brvbar; &brvbar; out_content_type.startsWith("text/html"))
{
InputStream ipstm = messagePart.getInputStream();
BufferedReader bufreader = new BufferedReader(new InputStreamReader(ipstm));
String thisLine = bufreader.readLine();
while (thisLine != null)
{
System.out.println("thisLine: "+thisLine);
thisLine = bufreader.readLine();
}
}
*/
System.out.println("------------------------------------");
message[i].setFlag(Flags.Flag.DELETED,true);
}
folder.close(true);
store.close();
}
catch(Exception ej2)
{
System.out.println(ej2);
}

}