倾听音乐系统毕业设计(本科论文).doc

大连交通大学信息工程学院毕业设计(论文)任务书题 目 倾听音乐系统任务及要求： 1.设计（研究）内容和要求任务：1、 调查倾听音乐系统当前技术的发展近况，完成实习报告，字数不少于3000，第三周交给指导老师。2、 结合自己实习情况安排进度，填写进度计划表，第二周完成后交给指导老师签字，并严格执行。3、 按照软件工程思想，独立完成系统的设计和程序开发，完成代码估计2000行左右。4、 用java Struts2 Spring技术设计实现过程。5、 程序简洁，算法可行，运行情况良好。要求：1、 每周和指导老师至少见面沟通一次，回报课题进展情况，接受老师询问。2、 接到任务书后，查阅与题目及专业相关的外文资料进行翻译，要求不少于10000个外文字符，译出汉字不得少于3000，于第四周交给指导老师审阅。3、 毕业设计第13周完成毕业论文的装订，并由指导老师评阅。论文要求12000字以上，包括综述、系统总体设计、系统实现、性能分析、结论等。4、 教学第13周通过中软及教研室组织进行软件验收，验收时要提供软件使用说明书。5、 于第13周提出毕业答辩申请并签字。6、 第14 周答辩，要求制作PPT7、2.原始依据通过大学几年的学习，已经学习了诸如软件工程、数据库原理及应用、数据结构、C+、Oracle、JAVA等多门程序设计语言和网络等基础知识和专业知识，学生有能力而且可以独立完成小中型项目的设计与开发。学校现有设备和环境可以提供给学生实习和上机，而且具有专业老师可以指导学生。 3.参考文献1 余浩东.Java应用框架设计与项目开发M.北京清华大学出版社.2008.12 埃史尔.陈昊鹏.Java编程思想（第4版）M.机械工业出版社.2007.63 李真.Eclipse开发技术详解M.北京化学工业出版社.2010.14 张冬青.数据库原理与应用.北京中国轻工业出版社.20095 孙鑫.Struts2 深入详解M.北京电子工业出版社.2002.26 温涛.东软Java软件工程师实例参考手册M.大连东软电子出版社.20077 罗玉玲.J2EE应用开发详解M.电子工业出版社.2009.48 陈刚.Eclipse从入门到精通M.北京清华大学出版社.20079 SerborDatebase ProgrammingMMachine Engneer.200910 Sultan Bradl Bradl eupenXML ProgrammingMMicrosoft Press2002指导教师签字：教研室主任签字：2012 年 3 月 26 日The History of the InternetThe Beginning - ARPAnetThe Internet started as a project by the US government. The object of the project was to create a means of communications between long distance points, in the event of a nation wide emergency or, more specifically, nuclear war. The project was called ARPAnet, and it is what the Internet started as. Funded specifically for military communication, the engineers responsible for ARPANet had no idea of the possibilities of an Internet. By definition, an Internet is four or more computers connected by a network. ARPAnet achieved its network by using a protocol called TCP/IP. The basics around this protocol was that if information sent over a network failed to get through on one route, it would find another route to work with, as well as establishing a means for one computer to talk to another computer, regardless of whether it was a PC or a Macintosh. By the 80s ARPAnet, just years away from becoming the more well known Internet, had 200 computers. The Defense Department, satisfied with ARPAnets results, decided to fully adopt it into service, and connected many military computers and resources into the network. ARPAnet then had 562 computers on its network. By the year 1984, it had over 1000 computers on its network. In 1986 ARPAnet (supposedly) shut down, but only the organization shutdown, and the existing networks still existed between the more than 1000computers. It shut down due to a failied link up with NSF, who wanted toconnect its 5 countywide super computers into ARPAnet. With the funding of NSF, new high speed lines were successfully installedat line speeds of 56k (a normal modem nowadays) through telephone linesin 1988. By that time, there were 28,174 computers on the (by then decided) Internet. In 1989 there were 80,000 computers on it. By 1989, there were 290,000. Another network was built to support the incredible number of peoplejoining. It was constructed in 1992. Today - The InternetToday, the Internet has become one of the most important technological advancements in the history of humanity. Everyone wants to get on line to experience the wealth of information of the Internet. Millions of people now use the Internet, and its predicted that by the year 2003 every single person on the planet will have Internet access. The Internet has truly become a way of life in our time and era, and is evolving so quickly its hard to determine where it will go next, as computer and network technology improve every day. HOW IT WORKS:Its a standard thing. People using the Internet. Shopping, playing games,conversing in virtual Internet environments. The Internet is not a thing itself. The Internet cannot just crash. It functions the same way as the telephone system, only there is no Internet company that runs the Internet. The Internet is a collection of millioins of computers that are all connected to each other, or have the means to connect to each other. The Internet is just like an office network, only it has millions of computers connected to it. The main thing about how the Internet works is communication. How does a computer in Houston know how to access data on a computer in Tokyo to view a webpage? Internet communication, communication among computers connected to the Internet, is based on a language. This language is called TCP/IP. TCP/IP establishes a language for a computer to access and transmit data over the Internet system. But TCP/IP assumes that there is a physical connecetion between one computer and another. This is not usually the case. There would have to be a network wire that went to every computer connected to the Internet, but that would make the Internet impossible to access. The physical connection that is requireed is established by way of modems,phonelines, and other modem cable connections (like cable modems or DSL). Modems on computers read and transmit data over established lines,which could be phonelines or data lines. The actual hard core connections are established among computers called routers. A router is a computer that serves as a traffic controller for information. To explain this better, lets look at how a standard computer might view a webpage. 1. The users computer dials into an Internet Service Provider (ISP). The ISP might in turn be connected to another ISP, or a straight connection into the Internet backbone. 2. The user launches a web browser like Netscape or Internet Explorer and types in an internet location to go to. 3. Heres where the tricky part comes in. First, the computer sends data about its data request to a router. A router is a very high speed powerful computer running special software. The collection of routers in the world make what is called a backbone, on which all the data on the Internet is transferred. The backbone presently operates at a speed of several gigabytes per-second. Such a speed compared to a normal modem is like comparing the heat of the sun to the heat of an ice-cube. Routers handle data that is going back and forth. A router puts small chunks of data into packages called packets, which function similarly to envelopes. So, when the request for the webpage goes through, it uses TCP/IP protocols to tell the router what to do with the data, where its going, and overall where the user wants to go. 4. The router sends these packets to other routers, eventually leading to the target computer. Its like whisper down the lane (only the information remains intact). 5. When the information reaches the target web server, the webserver then begins to send the web page back. A webserver is the computer where the webpage is stored that is running a program that handles requests for the webpage and sends the webpage to whoever wants to see it. 6. The webpage is put in packets, sent through routers, and arrive at the users computer where the user can view the webpage once it is assembled. The packets which contain the data also contain special information that lets routers and other computers know how to reassemble the data in the right order. With millions of web pages, and millions of users, using the Internet is not always easy for a beginning user, especially for someone who is not entirely comfortale with using computers. Below you can find tips tricks and help on how to use main services of the Internet. Before you access webpages, you must have a web browser to actually be able to view the webpages. Most Internet Access Providers provide you with a web browser in the software they usually give to customers; you. The fact that you are viewing this page means that you have a web browser. The top two use browsers are Netscape Communicator and Microsoft Internet Explorer. Netscape can be found at and MSIE can be found at The fact that youre reading this right now means that you have a web browser. Next you must be familiar with actually using webpages. A webpage is a collection of hyperlinks, images, text, forms, menus, and multimedia. To navigate a webpage, simply click the links it provides or follow its own instructions (like if it has a form you need to use, it will probably instruct you how to use it). Basically, everything about a webpage is made to be self- explanetory. That is the nature of a webpage, to be easily navigatable. Oh no! a 404 error! Cannot find web page? is a common remark made by new web-users. Sometimes websites have errors. But an error on a website is not the users fault, of course.A 404 error means that the page you tried to go to does not exist. This could be because the site is still being constructed and the page hasnt been created yet, or because the site author made a typo in the page. Theres nothing much to do about a 404 error except for e-mailing the site administrator (of the page you wanted to go to) an telling him/her about the error.A Javascript error is the result of a programming error in the Javascript code of a website. Not all websites utilize Javascript, but many do. Javascript is different from Java, and most browsers now support Javascript. If you are using an old version of a web browser (Netscape 3.0 for example), you might get Javascript errors because sites utilize Javascript versions that your browser does not support. So, you can try getting a newer version of your web browser. E-mail stands for Electronic Mail, and thats what it is. E-mail enables people to send letters, and even files and pictures to each other. To use e-mail, you must have an e-mail client, which is just like a personal post office, since it retrieves and stores e-mail. Secondly, you must have an e-mail account. Most Internet Service Providers provide free e-mail account(s) for free. Some services offer free e-mail, like Hotmail, and Geocities. After configuring your e-mail client with your POP3 and SMTP server address (your e-mail provider will give you that information), you are ready to receive mail. An attachment is a file sent in a letter. If someone sends you an attachment and you dont know who it is, dont run the file, ever. It could be a virus or some other kind of nasty programs. You cant get a virus just by reading e-mail, youll have to physically execute some form of program for a virus to strike. A signature is a feature of many e-mail programs. A signature is added to the end of every e-mail you send out. You can put a text graphic, your business information, anything you want. Imagine that a computer on the Internet is an island in the sea. The sea is filled with millions of islands. This is the Internet. Imagine an island communicates with other island by sending ships to other islands and receiving ships. The island has ports to accept and send out ships. A computer on the Internet has access nodes called ports. A port is just a symbolic object that allows the computer to operate on a network (or the Internet). This method is similar to the island/ocean symbolism above. Telnet refers to accessing ports on a server directly with a text connection. Almost every kind of Internet function, like accessing web pages,chatting, and e-mailing is done over a Telnet connection. Telnetting requires a Telnet client. A telnet program comes with the Windows system, so Windows users can access telnet by typing in telnet (without the s) in the run dialog. Linux has it built into the command line; telnet. A popular telnet program for Macintosh is NCSA telnet. Any server software (web page daemon, chat daemon) can be accessed via telnet, although they are not usually meant to be accessed in such a manner. For instance, it is possible to connect directly to a mail server and check your mail by interfacing with the e-mail server software, but its easier to use an e-mail client (of course). There are millions of WebPages that come from all over the world, yet how will you know what the address of a page you want is? Search engines save the day. A search engine is a very large website that allows you to search its own database of websites. For instance, if you wanted to find a website on dogs, youd search for dog or dogs or dog information. Here are a few search-engines. 1. Altavista () - Web spider & Indexed2. Yahoo () - Web spider & Indexed Collection3. Excite () - Web spider & Indexed4. Lycos () - Web spider & Indexed5. Metasearch () - Multiple searchA web spider is a program used by search engines that goes from page to page, following any link it can possibly find. This means that a search engine can literally map out as much of the Internet as its own time and speed allows for.An indexed collection uses hand-added links. For instance, on Yahoos site. You can click on Computers & the Internet. Then you can click on Hardware. Then you can click on Modems, etc., and along the way through sections, there are sites available which relate to what section youre in. Metasearch searches many search engines at the same time, finding the top choices from about 10 search engines, making searching a lot more effective.Once you are able to use search engines, you can effectively find the pages you want. With the arrival of networking and multi user systems, security has always been on the mind of system developers and system operators. Since the dawn of AT&T and its phone network, hackers have been known by many, hackers who find ways all the time of breaking into systems. It used to not be that big of a problem, since networking was limited to big corporate companies or government computers who could afford the necessary computer security. The biggest problem now-a-days is personal information. Why should you be careful while making purchases via a website? Lets look at how the internet works, quickly. The user is transferring credit card information to a webpage. Looks safe, right? Not necessarily. As the user submits the information, it is being streamed through a series of computers that make up the Internet backbone. The information is in little chunks, in packages called packets. Heres the problem: While the information is being transferred through this big backbone, what is preventing a hacker from intercepting this data stream at one of the backbone points.Big-brother is not watching you if you access a web site, but users should be aware of potential threats while transmitting private information. There are methods of enforcing security, like password protection, an most impor