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摘  要
     
　　　隨著計(jì)算機(jī)網(wǎng)絡(luò)的發(fā)展，電子郵件以其快速、便利、成本低等優(yōu)勢(shì)已成為人們生活中不可或缺的一部分，使人與人之間信息傳輸?shù)臅r(shí)間大為縮短。電子郵件（E-mail）就是通過(guò)Internet或者Intranet網(wǎng)絡(luò)從某一終端機(jī)輸入并通過(guò)郵件服務(wù)器傳送到另一終端的信件、便條、文件、圖片或聲音等信息。作為網(wǎng)絡(luò)中最早發(fā)展起來(lái)的部分，電子郵件的功能也最為強(qiáng)大，已成為目前網(wǎng)絡(luò)上用戶最廣泛、使用頻率最高的一種應(yīng)用，甚至是人們上網(wǎng)的第一需求。
　　　本文先對(duì)與郵件發(fā)送和接收程序開(kāi)發(fā)密切相關(guān)的協(xié)議如SMTP、POP3協(xié)議作了個(gè)系統(tǒng)而全面的闡述，然后利用Java Mail API實(shí)現(xiàn)郵件的收發(fā)。

關(guān)鍵詞：電子郵件；JavaMail；JSP；郵件協(xié)議

　　                               ABSTRACT
　　　
　　　Along with the development of the calculator network, E-mail with its fleetness, convenient, the low etc. in cost advantage has become people life theinside is necessary a part, make interpersonal time that information deliver big for shorten.E-mail is to passes the Internet or the networkof Intranet from some a the computer terminal input and pass the mail server deliver another terminal letter, memo, document, picture or voice etc. the characteristics suffered the netizen biggest favor.Part that conduct and actions network inside developped at the earliest stage, the function of the E-mail is the most strong and big too, have become current network top the customer is the most extensive, usage the frequency is tallest a kind of application, even is people internet access the first need.
　　　This text first to send out with mail with receive the procedure develop the closely-related agreement,such as SMTP, POP3, the agreement made a system but expatiate completely,thenUse of Java Mail API to achieve the message transceiver.

Keyword:  E-mail；JavaMail；JSP；SMTP；POP3

目  錄
摘要............................................................................................................................I
ABSTRACT...............................................................................................................I
1 緒論 1
1.1 研究背景 1
1.2 國(guó)內(nèi)外研究現(xiàn)狀 1
1.2.1 國(guó)內(nèi)研究現(xiàn)狀.................................................................................................1
1.2.2 國(guó)外研究現(xiàn)狀.................................................................................................2
1.2.3 國(guó)外最新動(dòng)態(tài).................................................................................................2
1.3 研究?jī)?nèi)容 3
2 電子郵件系統(tǒng)及其相關(guān)協(xié)議 4
2.1電子郵件系統(tǒng)簡(jiǎn)介 4
2.1.1 郵件分發(fā)代理（MDA）.................................................................................................4
2.1.2 郵件傳輸代理（MTA）.................................................................................................5
2.1.3 郵件用戶代理（MUA）..................................................................................................5
2.2 E-mail協(xié)議概述 6
2.2.1 SMTP協(xié)議.......................................................................................................6
2.2.2 POP協(xié)議........................,.................................................................................6
2.2.3 IMAP協(xié)議.......................................................................................................7
2.2.4 MIME協(xié)議.......................................................................................................8
2.3 電子郵件服務(wù)器 8
3 JavaMail技術(shù) 10
3.1 JavaMail API分層體系結(jié)構(gòu) 10
3.2 JavaMail API中的關(guān)鍵類(lèi) 10
3.3 基于JavaMail API收發(fā)郵件的過(guò)程 11
4 系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn) 13
4.1 Web郵件系統(tǒng)整體框架 13
4.2 JavaMail API的安裝.........................................................................................13
4.3 系統(tǒng)功能的實(shí)現(xiàn) 15
4.3.1 登陸郵件服務(wù)器的驗(yàn)證 16
4.3.2 利用IMAP協(xié)議接收電子郵件 16
4.3.3 查看電子郵件 18
4.3.4 利用SMTP協(xié)議發(fā)送電子郵件 19
4.4 系統(tǒng)的發(fā)布與運(yùn)行..........................................................................................21
總結(jié) 22
致謝.........................................................................................................................23
參考文獻(xiàn).................................................................................................................24