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用intellij idea编写java的发送邮件,接收邮件,发送带附件的邮件

广西民族大学

实验报告

学院：

班级11信计姓名学号分数

实验日期2014.5.11 指导老师秦董洪

实验名称用java实现邮件的发送和接收

实验内容:

编写一个发送和接收邮件信息的邮件程序，包括邮件中附件的发送与接收。实验所用软件:Intellij idea 13.0

实验过程:

(1).在D盘下新建两个文本文件,分别是sendEmail.txt和receiveEmail.txt,在这两个文件里加上两行数据,第一行是邮箱地址,第二行是密码.前者是记录着发送邮件的邮箱地址与邮箱密码,后者记录着查看接收邮件的邮箱地址与密码

(2).打开Intellij idea，按File—New module，新建一个java模块,命名为Email.

如下图所示:

(3).在Intellij idea的project面板窗口里，双击展开Email，右键单击它的子文件夹“src”，新建一个”java”文件，命名为“Email.java”

(4).编写出程序的实现代码

//EmailHandler.java

import javax.activation.DataHandler;

import javax.activation.FileDataSource;

import javax.mail.*;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeBodyPart;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMultipart;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileReader;

import java.io.InputStreamReader;

import java.util.Date;

import java.util.Properties;

class EmailHandler {

private static String server = "https://www.360docs.net/doc/d66996540.html,";

private static int port = 25;

private String pop3 = "https://www.360docs.net/doc/d66996540.html,";

public void sendEmail(String emailFrom, String emailFromPassword, String emailTo, String emailSubject, String body,

String fileName) {

try {

File f = new File(fileName);

String fName = f.getName();

Properties props = new Properties();

props.put("mail.smtp.host", server);

props.put("mail.smtp.port", String.valueOf(port));

props.put("mail.smtp.auth", "true");

Transport transport = null;

Session session = Session.getDefaultInstance(props, null);

transport = session.getTransport("smtp");

transport.connect(server, emailFrom, emailFromPassword);

MimeMessage msg = new MimeMessage(session);

msg.setSentDate(new Date());

InternetAddress fromAddress = new InternetAddress(emailFrom);

msg.setFrom(fromAddress);

InternetAddress[] toAddress = new InternetAddress[1];

toAddress[0] = new InternetAddress(emailTo);

msg.setRecipients(Message.RecipientType.TO, toAddress);

msg.setSubject(emailSubject, "UTF-8");

MimeMultipart multi = new MimeMultipart();

BodyPart textBodyPart = new MimeBodyPart(); //第一个BodyPart.主要写一些一般的信件内容。

textBodyPart.setText(body);

// 压入第一个BodyPart到MimeMultipart对象中。

multi.addBodyPart(textBodyPart);

FileDataSource fds = new FileDataSource(fileName); //必须存在的文档，否则throw异常。

BodyPart fileBodyPart = new MimeBodyPart(); //第二个BodyPart

fileBodyPart.setDataHandler(new DataHandler(fds)); //字符流形式装入文件

fileBodyPart.setFileName(fName); //设置文件名，可以不是原来的文件名。

multi.addBodyPart(fileBodyPart);

// MimeMultPart作为Content加入message

msg.setContent(multi);

msg.setFileName(fileName);

msg.saveChanges();

transport.sendMessage(msg, msg.getAllRecipients());

} catch (NoSuchProviderException e) {

e.printStackTrace();

} catch (MessagingException e) {

e.printStackTrace();

}

}

public void sendEmail(String emailFrom, String emailFromPassword, String emailTo, String emailSubject, String body)

{

try{

Properties props = new Properties();

props.put("mail.smtp.host", server);

props.put("mail.smtp.port", String.valueOf(port));

props.put("mail.smtp.auth", "true");

Transport transport = null;

Session session = Session.getDefaultInstance(props, null);

transport = session.getTransport("smtp");

transport.connect(server, emailFrom, emailFromPassword);

MimeMessage msg = new MimeMessage(session);

msg.setSentDate(new Date());

InternetAddress fromAddress = new InternetAddress(emailFrom);

msg.setFrom(fromAddress);

InternetAddress[] toAddress = new InternetAddress[1];

toAddress[0] = new InternetAddress(emailTo);

msg.setRecipients(Message.RecipientType.TO, toAddress);

msg.setSubject(emailSubject, "UTF-8");

msg.setText(body);

transport.sendMessage(msg, msg.getAllRecipients());

}

catch(Exception e){

e.printStackTrace();

}

}

public void receiveEmail(String pop3, String user, String password) throws Exception { Properties props = System.getProperties();

Session session = Session.getInstance(props, null);

Store store = session.getStore("pop3");

store.connect(pop3, user, password);

Folder folder = store.getFolder("INBOX");

folder.open(Folder.READ_WRITE);

Message[] msg = folder.getMessages();

for (int i = 0; i < msg.length; i++) {

System.out.println("来自: " + msg[i].getFrom()[0]);

System.out.println("标题: " + msg[i].getSubject());

System.out.println("内容: " + msg[i].getContent() + "\n");

if(((msg[i].getFrom()[0]).toString()).equalsIgnoreCase("155********@https://www.360docs.net/doc/d66996540.html,")) {

String s;

BufferedReader in = new BufferedReader(new InputStreamReader(msg[i].getInputStream()));

System.out.println("-----Mail Text-----");

while(!(s=in.readLine()).equals("")) {

System.out.println(s);

}

in.close();

}

}

folder.close(false);

store.close();

}

public String getUserInputFromCMD(String s) throws Exception {

System.out.println(s);

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

String b;

b = br.readLine();

String userInput = b.trim();

return userInput;

}

public String[] getUserInputFromTxt(File file) throws Exception {

FileReader fr =new FileReader(file);

BufferedReader br = new BufferedReader(fr);

String data;

String[] userInfo = new String[2];

int i = 0;

while((data = br.readLine()) != null) {

userInfo[i] = data;

i++;

}

return userInfo;

}

public void chooseOperation(EmailHandler iMailMan) throws Exception {

System.out.println("请选择你要执行的操作：1.发送带附件邮件 2.发送没有携带附件的邮件 3.接收邮件 4.退出");

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

char a = (char) br.read();

switch (a) {

case '1' : {

String emailTo = iMailMan.getUserInputFromCMD("请输入收件人的邮箱: ");

String emailSubject = iMailMan.getUserInputFromCMD("请输入邮件的标题: ");

String emailContent = iMailMan.getUserInputFromCMD("请输入邮件的内容: ");

String fileName = iMailMan.getUserInputFromCMD("请输入附件的路径,路径中的'\\'请加上转义字符: ");

//从文件里获取邮箱的账户和密码

String[] userInfo = iMailMan.getUserInputFromTxt(new File("D:\\sendEmail.txt"));

String emailFrom = userInfo[0];

String emailFromPassword = userInfo[1];

iMailMan.sendEmail(emailFrom, emailFromPassword, emailTo, emailSubject, emailContent, fileName);

System.out.println("邮件发送成功!");

iMailMan.chooseOperation(iMailMan);

}

break;

case '2' : {

String emailTo = iMailMan.getUserInputFromCMD("请输入收件人的邮箱: ");

String emailSubject = iMailMan.getUserInputFromCMD("请输入邮件的标题: ");

String emailContent = iMailMan.getUserInputFromCMD("请输入邮件的内容: ");

//从文件里获取邮箱的账户和密码

String[] userInfo = iMailMan.getUserInputFromTxt(new File("D:\\sendEmail.txt"));

String emailFrom = userInfo[0];

String emailFromPassword = userInfo[1];

iMailMan.sendEmail(emailFrom, emailFromPassword, emailTo, emailSubject, emailContent);

System.out.println("邮件发送成功!");

iMailMan.chooseOperation(iMailMan);

}

break;

case '3' : {

//从文件里获取邮箱的账户和密码

String[] userInfo = iMailMan.getUserInputFromTxt(new File("D:\\receiveEmail.txt"));

String user = userInfo[0];

String password = userInfo[1];

iMailMan.receiveEmail(pop3, user, password);

System.out.println("邮件接收成功!");

iMailMan.chooseOperation(iMailMan);

}

break;

case '4' : break;

}

}

public static void main(String[] args) {

EmailHandler iMailMan = new EmailHandler();

try {

iMailMan.chooseOperation(iMailMan);

} catch (Exception e) {

e.printStackTrace();

}

}

}

(5).程序的运行截图:

发送不带附件的邮件:

发送带附件的邮件:

(5).遇到的问题：

对于javaMail API的内容,书上很少,不得不自己去查阅.而网上的资源又太零散,所以学习起来有点费力.

(6)实验心得：

对于java Mail的接口有了初步的了解,以及学会了简单地运用它们

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