篮球网站的设计与实现

5.4文章页面设计

5.4.1文章界面

文章页面包括文章正文、相关新闻等内容，能够让用户了解文章的内容和相关的

辽宁科技大学毕业设计（论文） 第28页

文章，如图5.4所示。

图5.4 文章页图

5.4.2 关键技术

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辽宁科技大学毕业设计（论文） 第29页

第6章 系统测试

6.1 用户管理模块测试

用户管理模块测试的测试项目、过程及结果，如表6.1所示。

表 6.1 用户管理测试表

项目

管理员登录

测试过程及结果

打开用户登录页面，输入用户名和密码，如果输入的用户名、密码和用户权限都匹配，则登录成功，否则提示用户名或密码错误，或者是您无权登录本页面。

点击添加用户，进入添加用户表单，输入用户的个人信息和选择一种用户权限，点击添加按钮，用户信息添加成功。

点击管理用户选项，进入用户列表，选择一位用户点击常规操作中的删除链接，则该用户被删除。

点击管理用户选项，进入用户列表，选择一位用户点击常规操作中的修改链接，则该用户的现有的信息和用户权限将显示出来，修改信息后，点击修改按钮，用户信息修改成功。

点击管理用户选项，进入用户列表，选择一位用户点击常规操作中的密码初始化链接，则该用户的密码被初始化。

点击管理用户选项，进入用户列表，选择一位用户点击该用户的用户名，则该用户的信息以对话框的方式显示。

点击退出管理按钮，用户即可退出，页面返回登录页面。

是否成功

是

添加用户

删除用户

用户信息修改

是

是

是

密码初始化

查看用户

管理员退出

是

是

是

6.2 频道管理模块测试

频道管理模块测试的测试项目、过程及结果，如表6.2所示。

表 6.2 频道管理测试表

项目

频道查看

频道添加

频道修改

测试过程及结果

点击管理频道选项，进入频道列表，选择一篇频道点击该频道名，则能查看管理员所建立的频道。

点击添加频道，进入添加频道表单，输入频道的具体信息，点击添加按钮，频道添加成功。

点击管理频道选项，进入频道列表，选择一频道点击常规操作中的修改链接，则该频道的内容将显示出来，修改后，点击修改按钮，频道内容修改成功。

点击管理频道选项，进入频道列表，选择一篇频道点击常规操作中的删除链接，则该频道被删除。

点击频道搜索选项，在频道名中输入想要搜索的关键词，点击搜索按钮即可得到搜索的结果。

是否成功

是

是

是

频道删除

按频道名搜索频道

是

是

辽宁科技大学毕业设计（论文） 第30页

6.3 栏目管理模块测试

栏目管理模块测试的测试项目、过程及结果，如表6.3所示。

表 6.3 栏目管理测试表

项目

栏目查看

栏目添加

栏目修改

测试过程及结果

点击管理栏目选项，进入栏目列表，点击栏目名，则能查看管理员所

建立的栏目。

点击添加栏目，进入添加栏目表单，输入栏目的信息，点击添加按钮，栏目添加成功。

点击管理栏目选项，进入栏目列表，点击常规操作中的修改链接，则该栏目的内容将显示出来，修改后，点击修改按钮，栏目内容修改成功。

点击管理栏目选项，进入栏目列表，点击常规操作中的删除链接，则该资料被删除。

点击栏目搜索选项，在栏目名中输入想要搜索的关键词，点击搜索按钮即可得到搜索的结果。

是否成功

是

是

是

栏目删除

按栏目名搜索栏目

是

是

6.4 新闻管理模块测试

新闻管理模块测试的测试项目、过程及结果，如表6.4所示。

表 6.4 新闻管理测试表

项目 测试过程及结果 是否成功

是 新闻查看 点击管理新闻选项，进入新闻列表，点击新闻名，则能查看管理员所发表的资料信息。

点击添加新闻，进入添加新闻表单，输入新闻的信息，点击添加按钮，新闻添加成功。

点击管理新闻选项，进入新闻列表，点击常规操作中的修改链接，则该新闻的内容将显示出来，修改后，点击修改按钮，新闻内容修改成功。

点击管理新闻选项，进入新闻列表，点击常规操作中的删除链接，则该新闻被删除。

点击新闻搜索选项，输入想要搜索的关键词，点击搜索按钮即可得到搜索的结果。

新闻添加 是

新闻修改 是

新闻删除 是

按课新闻搜索栏目

是

辽宁科技大学毕业设计（论文） 第31页

辽宁科技大学毕业设计（论文） 第32页

结论

在毕业设计的近三个多月的时间内，我根据设计要求，查阅了大量资料，进行了系统分析、设计、编程、调试运行等。

本网站基于PHPCMS工具开发，PHPCMS是一款由文章、下载、图片、分类信息、影视、商城、采集、财务等20多个功能模块组成的强大、易用、可扩展的网站管理软件。

通过这次毕业设计，对PHPCMS工具有了更深的理解，掌握了调试程序的一般技巧，同时培养了自己独立分析问题、解决问题和实际操作的能力。

辽宁科技大学毕业设计（论文） 第33页

致 谢

在辽宁科技大学信息技术学院的几年中，各位任课老师在学习上给予了我细心指导和热情帮助，他们兢兢业业、任劳任怨的高尚品德，令我终身受益，为我以后的人生指引了方向。

我的毕业设计能够得以顺利完成，是与我的指导老师康伟老师的全力支持和热心帮助分不开的，当我在开发过程中遇到问题的时候，康老师每次都能给予耐心、全面的解答，没有半句怨言，真正作到为人师表、授业解惑。

由于老师的教诲和热心的帮助，我在毕业设计的过程中所遇到的困难基本上都很快得到解决。通过毕业设计，不仅完成了我的学业，更重要的是使我对从需求分析到具体功能实现，再到最终测试和维护的一个网站有了深刻的理解，新的思维方法对我的思想也产生了极大的影响。现在我的动手能力和独立解决问题的能力得到了很大的锻炼和提高。

另外，在任务的完成过程中，由于开发语言和环境的相近性，我还得到了课题组同学的大力支持和帮助，正是他们的无私奉献才能够让我顺利地完成毕业设计。在此我真诚地向他们表示最衷心的感谢。

最后，感谢康伟老师以及计算机系各位老师的支持、关心和帮助。

辽宁科技大学毕业设计（论文） 第34页

参考文献

[1] 张冬青. 数据库原理与应用[M]. 中国轻工出版社,2005.9.

[2] 刘丹妮. （C#）大学实用教程[M]. 电子工业出版社,2007.2.

[3] 李克东. 数字化学习――信息技术与课程整合的核心[M]. 电化教育研究,2001.8.

[4] 徐福荫. 现代远程教育的理论与实践探讨[M]. 电化教育研究,2000.

[5] 陈育松. 实用网站建设技术[M]. 清华大学出版社,2002.8.

[6] StephenWalther. 揭秘（第二版）[M]. 中国电力出版社,2004.8.

[7] 蒋 理. 动态网页设计实用教程[M]. 西安电子科技大学出版社,2007.1.

[8] 柯清超. 专题学习网站的设计与开发[J]. 会议交流.

[9] Chris Goode. 1.0入门经典---C#编成篇[M]. 清华大学出版社,2002.11.

[10] Chris Ullman. Beginning 1.1 With Visual C#.NET2003[M]. 2004.6.

辽宁科技大学毕业设计（论文） 第35页

附录A

First, computer virus (Computer Virus) in the "People's Republic of China Computer

Information System Security Protection Bill" was a clear definition of the virus refers to

"the preparation of a computer program or insert the damage or destruction of computer

data functions, the impact of computer use and self-replication a set of computer

instructions or code. " In general textbooks and general information is defined as: the use

of computer software and hardware defects, damage to computer data and affect the

normal work of a computer instruction set or a set of program code.

Computer viruses first appeared in the 70 science fiction David Gerrold's When

HARLIE was One. First appeared in 1983, the definition of science: The Fred Cohen

(University of Southern California) doctoral thesis "Experimental computer viruses," "a

can own (or by the evolution of ) into other programs of the computer program "boot

sector viruses, macro (macro) viruses, script (script) the concept of the spread of the virus

is the same as biological viruses with a similar mechanism. biological virus is injected into

cells themselves.

Second, the long-term computer virus: Computer viruses often take advantage of the

weaknesses of the operating system to spread and improve the safety of the system is an

important anti-virus, but a perfect system is non-existent, too much emphasis on the safety

of the system will be most of the time the system checks for the virus, the system loss of

availability, practicality and ease of use, on the other hand, the requirements of the

confidentiality of information so that people in the leak and can not choose between

seizing the virus. Virus and anti-virus technology will be used as a long-standing

confrontation, with the two technologies will be the development of computer technology

and the development of long-term.

Third, the emergence of computer viruses: the virus is not from sudden or accidental

causes. A sudden power outage and accidental errors in the computer's disk and memory in

some garbled and random directions, but the code is going to be disorderly and chaotic, the

virus is a more perfect, delicate stringent code, strictly in accordance with the order to

organize themselves, and where the network to adapt to and cope with the environment, the

virus will not be formed through coincidence, and the need for a certain length, the length

辽宁科技大学毕业设计（论文） 第36页

of the basic terms from the probability that the code can not be generated randomly. The

virus is now endemic deliberately prepared by man-made,

Most viruses can be found the author and source of information, from a large number

of statistical analysis, the virus writers and the main objectives are: a number of talented

programmers in order to show himself and prove himself, in the dissatisfaction of their

superiors, in order to curiosity, in retaliation for , in order to congratulate and courtship, in

order to get control of password, in order to get reward reserved for software traps. Of

course there are political, military, religious, ethnic. Needs of the patent specifically

prepared, including a number of research institutions and hackers virus test virus.

Fourth, the characteristics of computer viruses, computer viruses have the following

characteristics:

(1) parasitic parasitic computer viruses in other proceedings, when the

implementation of this procedure, the virus from damaging effects, and not before the start

of this process, it is difficult to be identified.

(2) infectious computer viruses not only damaging in itself, is more harmful infectious,

once the virus is copied or generated variants, and its speed is difficult to prevent.

Infectious is a basic characteristic of the virus. In the biosphere, the virus through the

spread of infection from one organism to another organism. Under appropriate conditions,

it can be a large number of breeding, and were infected with the disease showed the

organisms or even death. Similarly, computer viruses will be through various channels

from the infected computer has been spread to the computer is not infected, and in some

cases of infection caused by disorders of the computer or even paralysis.

And the difference is that biological viruses, computer virus is a computer program

produced by man-made code, this code into the computer and, once implemented, it will

search other conditions consistent with its procedures for transmission or storage medium,

then the target itself Insert code in which to achieve the purpose of self-reproduction.

Exposed to a computer as long as, if not dealt with, then this virus will be the rapid

spread of the loom, of which a large number of documents (typically the executable file)

will be infected. Were infected file also has become a new source of infection, and then

with other machines or to data exchange via Web access, virus infection will continue.

Normal computer program generally will not impose its own code to connect to other

programs on. But the virus can spread itself to all the code to force compliance with the

conditions of its transmission has not been transmitted on the procedure. Computer viruses

辽宁科技大学毕业设计（论文） 第37页

can be found through a variety of possible channels,

Such as floppy disk, the computer network to other computers infected. When you

found a machine with a virus often have used this computer has been infected with the

floppy disk with a virus, but with this machine networked with other computers may have

been infected with the virus. Determine whether an infectious process is for the computer

the most important conditions for the virus. Disk-virus program by modifying the

information or the contents of the paper sector and to embed their own way to achieve one

of the transmission and spread of the virus. The procedure is embedded in the host program

is called;

(3) the potential time bomb, as some viruses, like what time it is pre-designed attack.

Such as Black HIV, less than the scheduled time are aware of that do not come out, wait

until conditions are ripe, when all of a sudden on came the explosion, the destruction of the

system. Establishment of a sophisticated computer-virus program, normally does not enter

the system immediately after the attack, you can in a few weeks or months or even years

hidden in legal documents transmitted to other systems, without being found, the more

latent well, its existence in the system time will be longer range of transmission will be

greater.

The potential performance of the first refers to a virus detection program is not

exclusive is not out of checks, so the virus can hide quietly in the disk or tape to stay a few

days or even years, when the time comes, get the opportunity to run , we have four

breeding, diffusion, to continue to do harm. The second performance of the potential refers

to the internal computer virus is often a trigger mechanism, trigger conditions are not

satisfied, in addition to transmission of computer viruses do not do damage outside.

Once the trigger conditions are met, and some information on the screen, graphics or

special logo and some implementation of the operation of the system, such as formatting a

disk, delete the disk files, so the data file encryption, blocking the keyboard, as well as

allowing the system to deadlock and so on;

(4) hidden computer viruses are highly concealed, and some can be detected by virus

software, and some simply do not check out some of the time when the hidden is, the

volatility of such viruses are usually very difficult to deal with.

(5) destructive computer after poisoning may lead to the normal procedure can not run,

the computer files deleted or damaged to varying degrees. Usually pass: by adding,

changing, shifting.

辽宁科技大学毕业设计（论文） 第38页

(6) computer viruses can be triggered by a virus or the emergence of value to induce

the implementation of infection or virus attacks can be triggered as the characteristics. In

order to cover themselves, the virus must be hidden and less to do action. If no action has

been hidden, then it can not be infected with the virus can not destroy, it will also lose mass

destruction. Virus it is necessary to cover the maintenance of mass destruction again, it

must have triggered. Virus is the trigger mechanism used to control the infection and

damage to the frequency of action. Virus with a predetermined trigger conditions, these

conditions may be the time, date, file type or specific data. The virus is running, the trigger

mechanism to check whether the conditions is scheduled to meet, if met, start the

destruction of infected or moves, so that infection or virus attacks; if not satisfied, so that

the virus continues to hide.

Fifth, computer virus classification, based on years of research on computer viruses,

according to scientific, systematic and rigorous methods, computer viruses can be

categorized as follows: In accordance with the method attribute of computer viruses

classification, computer viruses can be carried out in accordance with the following

attributes Category:

The existence of computer viruses in accordance with the classification of the media:

(1) the existence of the media in accordance with the virus, the virus can be divided

into the network viruses, file viruses, boot viruses. Network virus infection spread through

computer networks Networks executable files, computer virus infection (eg: COM, EXE,

DOC, etc.) to guide the boot sector virus infection (Boot) and hard disk boot sector of the

system ( MBR), there are three cases of mixed type, such as: multi-type virus (document

and guide the type) infected files and boot sector two goals, this virus usually have a

complex algorithm, they use non-conventional approach invasive systems,

At the same time, the use of encryption and the deformation algorithm.

Transmission of computer viruses in accordance with the method of Classification:

(2) According to the method of transmission of the virus can be divided into the

presence of virus and non-presence of virus, the presence of computer virus infection, the

presence of some of its own memory on the memory (RAM), this part of the procedures

articulated system call and go into the operating system, he is active until the shutdown or

restart. non-presence of virus in the given the opportunity to activate the computer's

memory was not infected with some virus in a small number of memory left, but does not

pass through this part of infection, this virus has been classified as non-presence of the

辽宁科技大学毕业设计（论文） 第39页

virus.

(1) According to the virus (3) According to undermine the ability of the virus can be

divided into the following categories:

Sound type

In addition to transmission to reduce the available disk space, no other impact on the

system.

Non-dangerous type

Just this kind of virus is to reduce the memory, display images, and similar sound

audio. The risk type, this type of virus in the computer system caused serious mistake.

Very dangerous type

Remove Programs such viruses, destruction of data, clear the system memory area

and operating system, important information. These viruses harm on the system, the

algorithm itself is not dangerous call, but when they are caused by infection would be

unpredictable and catastrophic damage. Caused by a virus program other errors will

destroy files and sectors, these viruses also cause damage in accordance with their ability

to breakdown. Some are harmless virus also may have a new version of DOS, Windows

and other operating system damage. For example: the virus at an early stage, the

There is a "Denzuk" virus 360K disk in very good work, will not cause any damage,

but in the subsequent high-density floppy disk can cause a lot of data loss.

(1) According to the virus (3) According to undermine the ability of the virus can be

divided into the following categories:

Sound type

In addition to transmission to reduce the available disk space, no other impact on the

system.

(4) According to the virus-specific algorithm, the virus can be divided into:

1. With the virus, the virus does not change the document itself, they have a EXE file

under the algorithm associated with the body, have the same name and different extensions

(COM), such as: body is accompanied by the XCOPY. COM. COM virus to

their own documents into the EXE file does not change, when DOS loads a document,

accompanied by the implementation of priority to the body, and then loaded by the body

with the implementation of the original EXE file.

2. "Worm" virus, spread through computer networks, without changing the documents

and information, the use of the network from a machine's memory spread to other

辽宁科技大学毕业设计（论文） 第40页

machines of memory, calculation of network addresses, the virus itself is sent over the

network. Sometimes they exist in the system generally does not occupy memory in

addition to other resources.

3. Parasitic virus in addition to accompanying and "worm" type, and other viruses

may be referred to as parasitic viruses, they depend on the system's boot sector or

document through the system of transmission, according to the different algorithms can be

divided into: practice-type virus, the virus itself contains errors, the spread can not be good,

for example, in the debugging stage of the virus.

4. Mysterious virus they generally do not directly modify the DOS interrupt and

sector data, but through technology and equipment, such as DOS file buffer internal

changes is not easy to see the resources, the use of more advanced technology. Free use of

the data DOS work area.

5. Variant virus (also known as the specter of the virus) the virus uses a complex

algorithm, so that the spread of its own each have a different content and length. Their

general approach is a mixture of the decoding algorithm has nothing to do command and

changes in body composition over the virus.

Other acts of sabotage, computer viruses, vandalism reflects the ability of anti-virus.

Intense destruction of the virus depends on the virus author's subjective, and his desire to

have the technological capability. Tens of thousands of continuous development and

expansion of the virus, its strange destruction, its destruction can not be exhaustive, but it

is difficult to do a comprehensive description of the virus in accordance with the existing

data can undermine the goal of the virus and attack the site are summarized as follows:

attack system data areas, attack positions, including: search sector cited the main hard

drive, Boot Sector, FAT tables, such as file directory. In general,

System data areas to attack the virus is a vicious virus, is not easy to restore the

damaged data. Attacks on file, the virus attacks the document in many ways, can be cited

as follows: delete, rename, replace the content, the loss of part of program code, which

reversed, the time to write a blank, variable fragment, fake documents, lost cluster files,

lost data files. Attacks on memory, memory is an important resource for the computer as

well as virus attacks one of the main objectives, viruses and occupation and consumption

of additional system memory resources, can lead to some hard to run a larger program.

Virus attacks the way memory is as follows: use up a lot of memory, changes in the total

amount of memory to prohibit the distribution of memory, such as eating into memory.

辽宁科技大学毕业设计（论文） 第41页

Interfere with system operation, this type of virus will interfere with the normal operation

of the system as the destruction of their own behavior, such behavior is also diverse, you

can list all the following way: the implementation of an order not to interfere with the

implementation of the internal order, false alarm, so that documents can not be opened, so

that the internal stack overflow, occupied a special data area, turn the clock back, restart,

crash, forced the game to disrupt the serial port, parallel port and so on. Rate of decline, the

virus activated, its internal proceedings of the time delay,

Incorporated in the clock cycle time count, forcing the idling of computer, computer

speed has declined markedly. Attacks on the disk, disk data attacks, not to write, read write

operation changes, disk write bytes, such as lost time. Screen display disrupted, the virus to

disrupt the way a lot of screen display, can be cited as follows: characters falling around,

upside down, indicating the previous screen, cursor down, Scroll, jitter, write without basis,

eating, etc. characters. Keyboard virus, interfere with keyboard operation, has been found

in the following manner: ringing, blocking keyboard-for-word characters to erase cache,

repeat, such as the importation of disorder. Speaker viruses, many viruses run when the

computer's speakers make noise. Some virus writers to issue a variety of voices through the

speakers, some virus writers to allow the virus of the world play the beautiful melody

songs in elegant killing people tune in to the wealth of information has been found in the

following way speakers sound: play music, whistle sound bomb noise, sing,咔咔sound,

and so on ticking sound. Attacks on CMOS, the CMOS in the machine area, the

preservation of important data of the system,

For example, the system clock, disk type, memory capacity, and has a checksum.

Some virus activation can write on the CMOS area moves in the system CMOS data.

Interference with a printer, a typical phenomenon: false alarm, intermittent printing, such

as the replacement character.

Eight, the dangers of computer viruses, loss of computer resources and destruction,

not only would create a huge wealth of resources and waste, and may result in social

disaster, with the development of information society, the threat of computer viruses is

becoming increasingly serious, anti - the virus more difficult the task. At 17:01:59 on

November 2, 1988, the United States Cornell University Department of Computer Science

graduate students, and 23-year-old Morris (Morris) will be its procedures for the

preparation of the worms enter the computer network, resulting in tens of thousands of

computers that has blockage of the network. This matter is the computer industry as a

辽宁科技大学毕业设计（论文） 第42页

major earthquake caused a huge reaction,

Shocked the world, raises the fear of computer viruses and computer experts that

more attention and research dedicated to computer viruses. The second half of 1988, my

first time in the Bureau of Statistics found that the "small ball" virus, it greatly influenced

the statistical system, then by a computer virus attack caused "virus incident" occurred one

after another, some time ago found that the CIH, Melissa and other viruses is to a great loss

to society.

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附录B

一、计算机病毒(Computer Virus)在《中华人民共和国计算机信息系统安全保护条例》中被明确定义，病毒指“编制或者在计算机程序中插入的破坏计算机功能或者破坏数据，影响计算机使用并且能够自我复制的一组计算机指令或者程序代码”。而在一般教科书及通用资料中被定义为:利用计算机软件与硬件的缺陷，破坏计算机数据并影响计算机正常工作的一组指令集或程序代码 。计算机病毒最早出现在70年代

David Gerrold 科幻小说 When H.A.R.L.I.E. was One.最早科学定义出现在 1983:在Fred Cohen (南加大) 的博士论文 “计算机病毒实验”“一种能把自己(或经演变)注入其它程序的计算机程序”启动区病毒,宏(macro)病毒,脚本(script)病毒也是相同概念传播机制同生物病毒类似.生物病毒是把自己注入细胞之中。

二、计算机病毒的长期性：病毒往往会利用计算机操作系统的弱点进行传播，提高系统的安全性是防病毒的一个重要方面，但完美的系统是不存在的，过于强调提高系统的安全性将使系统多数时间用于病毒检查，系统失去了可用性、实用性和易用性，另一方面，信息保密的要求让人们在泄密和抓住病毒之间无法选择。病毒与反病毒将作为一种技术对抗长期存在，两种技术都将随计算机技术的发展而得到长期的发展。

三、计算机病毒的产生：病毒不是来源于突发或偶然的原因。一次突发的停电和偶然的错误，会在计算机的磁盘和内存中产生一些乱码和随机指令，但这些代码是无序和混乱的，病毒则是一种比较完美的，精巧严谨的代码，按照严格的秩序组织起来，与所在的系统网络环境相适应和配合起来，病毒不会通过偶然形成，并且需要有一定的长度，这个基本的长度从概率上来讲是不可能通过随机代码产生的。现在流行的病毒是由人为故意编写的，多数病毒可以找到作者和产地信息，从大量的统计分析来看，病毒作者主要情况和目的是：一些天才的程序员为了表现自己和证明自己的能力，处于对上司的不满，为了好奇，为了报复，为了祝贺和求爱，为了得到控制口令，为了软件拿不到报酬预留的陷阱等．当然也有因政治，军事，宗教，民族．专利等方面的需求而专门编写的，其中也包括一些病毒研究机构和黑客的测试病毒．

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四、计算机病毒的特点，计算机病毒具有以下几个特点：

（1） 寄生性 计算机病毒寄生在其他程序之中，当执行这个程序时，病毒就起破坏作用，而在未启动这个程序之前，它是不易被人发觉的。

（2） 传染性 计算机病毒不但本身具有破坏性，更有害的是具有传染性，一旦病毒被复制或产生变种，其速度之快令人难以预防。传染性是病毒的基本特征。在生物界，病毒通过传染从一个生物体扩散到另一个生物体。在适当的条件下，它可得到大量繁殖，并使被感染的生物体表现出病症甚至死亡。同样，计算机病毒也会通过各种渠道从已被感染的计算机扩散到未被感染的计算机，在某些情况下造成被感染的计算机工作失常甚至瘫痪。与生物病毒不同的是，计算机病毒是一段人为编制的计算机程序代码，这段程序代码一旦进入计算机并得以执行，它就会搜寻其他符合其传染条件的程序或存储介质，确定目标后再将自身代码插入其中，达到自我繁殖的目的。只要一台计算机染毒，如不及时处理，那么病毒会在这台机子上迅速扩散，其中的大量文件（一般是可执行文件）会被感染。而被感染的文件又成了新的传染源，再与其他机器进行数据交换或通过网络接触，病毒会继续进行传染。 正常的计算机程序一般是不会将自身的代码强行连接到其他程序之上的。而病毒却能使自身的代码强行传染到一切符合其传染条件的未受到传染的程序之上。计算机病毒可通过各种可能的渠道，如软盘、计算机网络去传染其他的计算机。当您在一台机器上发现了病毒时，往往曾在这台计算机上用过的软盘已感染上了病毒，而与这台机器相联网的其他计算机也许也被该病毒染上了。是否具有传染性是判别一个程序是否为计算机病毒的最重要条件。 病毒程序通过修改磁盘扇区信息或文件内容并把自身嵌入到其中的方法达到病毒的传染和扩散。被嵌入的程序叫做宿主程序；

（3） 潜伏性 有些病毒像定时炸弹一样，让它什么时间发作是预先设计好的。比如黑色星期五病毒，不到预定时间一点都觉察不出来，等到条件具备的时候一下子就爆炸开来，对系统进行破坏。一个编制精巧的计算机病毒程序，进入系统之后一般不会马上发作，可以在几周或者几个月内甚至几年内隐藏在合法文件中，对其他系统进行传染，而不被人发现，潜伏性愈好，其在系统中的存在时间就会愈长，病毒的传染范围就会愈大。 潜伏性的第一种表现是指，病毒程序不用专用检测程序是检查不出来的，因此病毒可以静静地躲在磁盘或磁带里呆上几天，甚至几年，一旦时机成熟，得到运行机会，就又要四处繁殖、扩散，继续为害。潜伏性的第二种表现是指，