使用javaMail来发送和接收带附件的邮件

╰+哭是因爲堅強的太久メ 2022-09-20 11:25 563阅读 0赞

使用javaMail发送（文本支持HTML）邮件

内容为HTML网页的邮件叫做HTML型邮件，它与文本型邮件的主要区别在于MIME类型的不同，一个为“text/html”，一个为“text/plain”。本文将使用javaMail发送HTML型邮件。用户通过在邮件书写页面attachMail.jsp填写表单然后提交给sendMail.jsp，，由sendMail.jsp调用实体bean实现邮件的发送。。

attachMail.jsp：

<%@ page language="java" import="java.util.\*" pageEncoding="gb2312"%>

String path =request.getContextPath();

String basePath =request.getScheme()+"://"\+request.getServerName()+":"\+request.getServerPort()+path+"/";

<!DOCTYPE HTML PUBLIC  "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>My JSP 'index.jsp' starting page</title>

<!--

-->

</head>

<body>

<h2>发送带附件HTML型邮件</h2><hr>

SMTP服务器：<input type="text" id="SMTPHost"name="SMTPHost" /><br>

登 录账 号：<input type="text" id="user"  name="user"/><br>

登 录密 码：<input type="text" id="password" name="password"/><br>

<hr>

发件人邮箱：<input type="text" id="from"name="from" /><br>

收件人邮箱：<input type="text" id="to"name="to" /><br>

邮 件标 题：<input type="text" id="subject" name="subject"/><br>

邮 件内 容：<textarea id="content"name="content" rows="5"  cols="40"></textarea><br>

<br>

附 件文 件：<input type="file" id="filename" name="filename"/><br><br>

</form>

</body>

</html>

SendAttachMail.java

package test;

importjava.util.Date;

importjava.util.Properties;

importjavax.activation.DataHandler;

importjavax.activation.FileDataSource;

importjavax.mail.BodyPart;

importjavax.mail.Message;

importjavax.mail.Multipart;

import javax.mail.Session;

importjavax.mail.Transport;

importjavax.mail.internet.InternetAddress;

importjavax.mail.internet.MimeBodyPart;

importjavax.mail.internet.MimeMessage;

importjavax.mail.internet.MimeMultipart;

public classSendAttachMail \{

String SMTPHost =""; //SMTP服务器

String user = "";     //登录SMTP服务器的账号

String password ="";//登录SMTP服务器的密码

String from ="";    //发件人邮箱

String to ="";         //收件人游戏

String subject ="";  //邮件标题

String content =""; //邮件内容

String filename ="";//附件文件名

public SendAttachMail()\{

public String getSMTPHost() \{

return SMTPHost;

public void setSMTPHost(String host) \{

SMTPHost = host;

public String getUser() \{

return user;

public void setUser(String user) \{

this.user = user;

public String getPassword() \{

return password;

public void setPassword(String password)\{

this.password = password;

public String getFrom() \{

return from;

public void setFrom(String from) \{

this.from = from;

public String getTo() \{

return to;

public void setTo(String to) \{

this.to = to;

public String getSubject() \{

return subject;

public void setSubject(String subject) \{

this.subject = subject;

public String getContent() \{

return content;

public void setContent(String content) \{

this.content = content;

public String getFilename() \{

return filename;

public void setFilename(String filename)\{

this.filename = filename;

//发送邮件

public boolean send()\{

//创建一个属性对象

Properties props = newProperties();

//指定SMTP服务器

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

//指定是否需要SMTP验证

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

try\{

//创建一个授权验证对象

SmtpAuth auth = newSmtpAuth();

auth.setAccount(user,password);

//创建一个session对象

Session mailSession =Session.getDefaultInstance(props,auth);

mailSession.setDebug(true);

//创建一个MimeMessage对象

MimeMessage message = newMimeMessage(mailSession);

//指定发件人游戏

message.setFrom(newInternetAddress(from));

//指定收件人邮箱

message.addRecipient(Message.RecipientType.TO,new InternetAddress(to));

//指定邮件主题

message.setSubject(new String(subject.getBytes("ISO8859-1"),  "gb2312"));

//指定邮件发送日期

message.setSentDate(newDate());

//指定邮件优先级 1：紧急，3：普通，5：缓慢

message.setHeader("X-Priority","1");

message.saveChanges();

//新建一个MimeMultipart对象用来存放多个BodyPart对象

Multipart container = newMimeMultipart();

//新建一个存放信件内容的BodyPart对象

BodyPart textBodyPart = newMimeBodyPart();

//给BodyPart对象设置内容和格式、编码格式

textBodyPart.setContent(new String(content.getBytes("ISO8859-1"), "gb2312"),"text/html;charset=gb2312");

//将含有信件内容的BodyPart加入到MimeMultipart对象中

container.addBodyPart(textBodyPart);

//新建一个存放信件附件的BodyPart对象

BodyPart fileBodyPart = newMimeBodyPart();

//处理邮件中附件文件名的中文问题

filename = new String(filename.getBytes("ISO8859-1"),  "gb2312");

String filepath ="C:\\\\Users\\\\Administrator\\\\Desktop\\\\"+filename;

//将本地文件作为附件

FileDataSource fds = newFileDataSource(filepath);

fileBodyPart.setDataHandler(newDataHandler(fds));

//处理邮件中附件文件名的中文问题

String attachName =fds.getName();

attachName = newString(attachName.getBytes("gb2312"),"ISO8859-1");

//设定附件文件名

fileBodyPart.setFileName(attachName);

//将附件的BodyPart对象加入到container中

container.addBodyPart(fileBodyPart);

//将container作为消息对象的内容

message.setContent(container);

//创建一个Transport对象

Transport transport =mailSession.getTransport("smtp");

System.out.println(SMTPHost);

System.out.println(user);

System.out.println(password);

//连接SMTP服务器

transport.connect(SMTPHost,user,password);

//发送邮件

transport.send(message,message.getAllRecipients());

transport.close();

return true;

\}catch (Exception e) \{

// TODO: handle exception

e.printStackTrace();

return false;

sendMail.jsp

<%@ page language="java" import="java.util.\*" pageEncoding="gb2312"%>

<%@ page import="test.SendAttachMail"%>

<jsp:useBean id="mySend" class="test.SendAttachMail"></jsp:useBean>

<jsp:setProperty property="\*" name="mySend"/>

**boolean** status = mySend.send();

**if**(status)\{

out.println("恭喜你。发送邮件成功！");

\}**else**\{

out.println("对不起发送邮件失败");

附带截图：attachMail.jsp

![Center][]

附带截图：SendAttachMail.java

![Center 1][]

附带截图：sendMail.jsp

![Center 2][]

Sina邮箱：

![Center 3][]

使用javaMail接收（文本支持HTML）邮件

receiveMail.jsp：

<%@ page language="java" import="java.util.\*" pageEncoding="gb2312"%>

String path =request.getContextPath();

String basePath =request.getScheme()+"://"\+request.getServerName()+":"\+request.getServerPort()+path+"/";

<!DOCTYPE HTML PUBLIC  "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<title>My JSP 'index.jsp' starting page</title>

<!--

-->

</head>

<body>

POP3服务器：<input type="text" id="POP3Host"name="POP3Host" /><br>

登 录账 号：<input type="text" id="user"  name="user"/><br>

登 录密 码：<input type="text" id="password" name="password"/><br>

</form>

</body>

</html>

GetMail.java：

package test;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Enumeration;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Properties;

import javax.mail.BodyPart;

import javax.mail.FetchProfile;

import javax.mail.Folder;

import javax.mail.Header;

import javax.mail.Message;

import javax.mail.Multipart;

import javax.mail.Part;

import javax.mail.Session;

import javax.mail.Store;

public class GetMail \{

StringPOP3Host = ""; // POP3Host服务器

Stringuser = ""; // 登录SMTP服务器的账号

Stringpassword = "";// 登录SMTP服务器的密码

Sessionsession = null;

Folderfolder = null;

Storestore = null;

publicGetMail() \{

publicString getPOP3Host() \{

returnPOP3Host;

publicvoid setPOP3Host(String host) \{

POP3Host= host;

publicString getUser() \{

returnuser;

publicvoid setUser(String user) \{

this.user= user;

publicString getPassword() \{

returnpassword;

publicvoid setPassword(String password) \{

this.password= password;

publicSession getSession() \{

returnsession;

publicvoid setSession(Session session) \{

this.session= session;

publicFolder getFolder() \{

returnfolder;

publicvoid setFolder(Folder folder) \{

this.folder= folder;

publicStore getStore() \{

returnstore;

publicvoid setStore(Store store) \{

this.store= store;

//连接邮件服务器

publicvoid connect() throws Exception \{

//创建一个授权验证对象

POP3Authauth = new POP3Auth();

auth.setAccount(user,password);

Propertiesprop = new Properties();

System.out.println(POP3Host);

prop.put("mail.pop3.host",POP3Host);

//取得一个session对象

session= Session.getDefaultInstance(prop, auth);

//取得一个Store对象

store= session.getStore("pop3");

System.out.println(user+"================"+password);

store.connect(POP3Host,user, password);

//取得一个Folder对象

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

folder.open(Folder.READ\_ONLY);

//获取所有邮件的列表

publicMessage\[\] getAllMail() throws Exception \{

//建立POP3连接

connect();

//取得所有的Message对象

Message\[\]msg = folder.getMessages();

FetchProfileprofile = new FetchProfile();

profile.add(FetchProfile.Item.ENVELOPE);

folder.fetch(msg,profile);

returnmsg;

//取得邮件列表的信息

publicList getMailInfo(Message\[\] msg) throws Exception \{

Listresult = new ArrayList();

Mapmap = null;

Multipartmp = null;

BodyPartpart = null;

Stringdisp = null;

SimpleDateFormatfmt = new SimpleDateFormat("yyyy 年 MM 月 dd 日 hh：mm：ss");

Enumerationenmu = null;

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

map= new HashMap();

//读取邮件ID

enmu= msg\[i\].getAllHeaders();

Headerh = null;

while(enmu.hasMoreElements()) \{

h= (Header) enmu.nextElement();

if(h.getName().equals("Message-ID")) \{

map.put("ID",h.getValue());

//读取邮件标题

map.put("subject",msg\[i\].getSubject());

//                   new String(subject.getBytes("ISO8859-1"),  "gb2312");

Stringsender = new String(msg\[i\].getFrom()\[0\].toString().getBytes("ISO8859-1"),

"GBK");

Stringdate = "";

if(msg\[i\].getSentDate()!=null)\{

date= fmt.getInstance().format(msg\[i\].getSentDate());

\}else\{

date= "";

//读取发件人

map.put("sender",sender);

//                   map.put("sender", msg\[i\].getFrom()\[0\].toString());

//读取发送时间

map.put("senddate",date);

//读取邮件大小

map.put("size",new Integer(msg\[i\].getSize())+"K");

//读取附件

map.put("hasAttach","");

//判断是否有附件

if(msg\[i\].isMimeType("multipart/\*")) \{

mp= (Multipart) msg\[i\].getContent();

//遍历每个Miltipart对象

for(int j = 0; j < mp.getCount(); j++) \{

part= mp.getBodyPart(j);

disp= part.getDescription();

//如果有附件

if(disp != null && (disp.equals(Part.ATTACHMENT)

||disp.equals(Part.INLINE))) \{

System.out.println("++++++++++++++");

map.put("hasAttach","X");

result.add(map);

returnresult;

//查找指定的邮件

publicMessage findMail(String id) throws Exception \{

Message\[\]msg = getAllMail();

Enumerationenmu = null;

Headerh = null;

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

enmu= msg\[i\].getAllHeaders();

while(enmu.hasMoreElements()) \{

h= (Header) enmu.nextElement();

if(h.getName().equals("Message-ID")

&&(h.getValue().equals(id))) \{

returnmsg\[i\];

returnnull;

//读取邮件内容

publicMap readMail(String basePath, String id) throws Exception \{

Mapmap = new HashMap();

//找到目标邮件

Messagemsg = findMail(id);

Stringtitle = "";

if(msg.getSubject()!=null)\{

title= msg.getSubject();

//读取邮件标题

map.put("subject",title);

System.out.println(msg.getFrom()\[0\].toString()+"====");

//读取发件人

map.put("sender",msg.getFrom()\[0\].toString());

map.put("attach","");

//取得邮件内容

if(msg.isMimeType("text/\*")) \{

map.put("content",msg.getContent().toString());

\}else \{

StringBufferresult = new StringBuffer();

Multipartmp = (Multipart) msg.getContent();

BodyPartpart = null;

Stringdisp = null;

//遍历每个Multipart对象

for(int j = 0; j < mp.getCount(); j++) \{

part= mp.getBodyPart(j);

disp =part.getDisposition();

//如果有附件

if(disp != null

&&(disp.equals(Part.ATTACHMENT) || disp

.equals(Part.INLINE)))\{

Stringfilename = part.getFileName();

filename= new String(filename.getBytes("ISO8859-1"),

"gb2312");

map.put("attach",filename);

//下载附件

InputStreamin = part.getInputStream();

filename= basePath + "/" + filename;

FileOutputStreamout = new FileOutputStream(new File(

filename));

byte\[\]content = new byte\[255\];

intread = 0;

while((read = in.read(content)) != -1) \{

out.write(content);

out.close();

in.close();

\}else\{

result.append(part.getContent().toString());

map.put("content",result.toString());

returnmap;

MailList.jsp：

<%@ page language="java" import="java.util.\*" pageEncoding="gb2312"%>

<%@ page import="test.GetMail"%>

<jsp:useBean id="receiver" class="test.GetMail" scope="session"></jsp:useBean>

<jsp:setProperty property="\*" name="receiver"/>

<html>

<head><title>我的收件箱</title></head>

<body>

<h2>我的收件箱</h2><hr>

</tr>

//取得邮件列表显示

Iterator it =receiver.getMailInfo(receiver.getAllMail()).iterator();

Map map = **null**;

//将邮件信息列表显示

**while**(it.hasNext())\{

map = (Map)it.next();

out.println("<tr height=30 valign = middle align=center>");

out.println("<td><a href='readMail.jsp?id="\+map.get("ID")+

"'target= '\_blank'>"\+map.get("subject")+"</a></td>");

out.println("<td>"\+map.get("sender")+"</td>");

out.println("<td>"\+map.get("senddate")+"</td>");

out.println("<td>"\+map.get("size")+"</td>");

out.println("<td>"\+map.get("hasAttach")+"</td>");

out.println("</tr>");

</table>

</body>

</html>

readMail.jsp：

<%@ page language="java" import="java.util.\*" pageEncoding="gb2312"%>

<%@ page import="test.GetMail"%>

//从session中取出receiver

GetMail receiver = (GetMail)session.getAttribute("receiver");

<html>

<body>

//取得请求参数

String id = request.getParameter("id");

String basePath = "C:\\\\Users\\\\Administrator\\\\Desktop\\\\";

//取得指定的邮件内容

Map result = receiver.readMail(basePath,id);

<tr>

</tr>

<tr>

</tr>

String attach = result.get("attach").toString();

//有附件才显示下面一行

**if**(attach.trim().length()>0)\{

<tr>

</tr>

<%\}  %>

<tr>

</tr>

</table>

</body>

</html>

演示效果：

ReceiveMail.jsp

![Center 4][]

MailList.jsp

![Center 5][]

readMail.jsp

![Center 6][]

备注：附件是写的本地路径，只为演示而已。。请保存在自己的服务器中

遇到的问题：

POP3 未开启

请开启 自己测试邮箱

![Center 7][]

[Center]: /images/20220828/70aff489764e4f8db2d3acc51c48fd98.png
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