网页设计毕设外文翻译基于JSP网页自动生成工具的设计与实现

1、word附件1：外文资料翻译译文基于JSP网页自动生成工具的设计和实现Web开发技术是Internet使用的一个重要方面，而JSP又是Web开发的最先进的技术，是当前Web开发人员的首选技术。但是由于JSP对Web开发人员要求较高，所以许多一般的Web开发人员还不能够使用这一项先进的技术。讨论基于模板和标签库的JSP网页自动生成工具的设计和实现，提出具体的设计思想和实现方法。 随着WWWWorld Wide Web的普及，动态网页技术也急速开展。从原来的CGICommon Gateway Interface到ASPActive Server Page，都从某种程度上满足了网页开发人员对动态网页

2、开发技术的需求。但是不管是CGI还是ASP都存在一定的局限性，如CGI对效劳器资源的消耗，ASP只能同Microsoft IIS一起使用等，这些都限制了这些技术的使用范围，极大地阻碍了它们的推广。广阔的页面开发人员都热切地盼望一种统一的页面开发技术，该技术应该具有的特点：和操作平台无关，能够在任何Web或使用程序效劳器上运行；将使用程序逻辑和页面显示别离；提供代码重用，简化开发基于Web的交互式使用程序的过程。 JSPJava Server Page技术就是被设计用来满足这样的要求的。JSP是由Sun MicroSystem公司于1999年6月推出的新的网页开发技术，它是基于Java Serv

3、let以及整个Java体系的Web开发技术，是Servlet21API的扩展。利用这一技术，可以建立先进、平安和跨平台的动态网站。 Java是未来的主流开发技术，具有很多优势。JSP那么是Java在InternetIntranet Web上的重要使用技术，得到了广泛的支持和成认，它可以和各种Java技术完好地结合在一起，从而实现非常复杂的使用。 作为一种基于文本的、以显示为中心的开发技术，JSP提供了Java Servlet的所有好处。为了做到逻辑功能和显示功能分开，JSP已经可以和JavaBeans、Enterprise JavaBeansEJB和Servlet一起工作。JSP的开发人员可以

4、通过使用JavaBeans、EJB和Servlet来完成大局部和网站逻辑相关的工作，而仅仅把显示的工作交给JSP页面来完成。内容和显示逻辑分开的好处在于，更新页面外观的人员不必懂得Java代码，而更新Java类的人员也不必是设计网页的行家。这就可以用带Java类的JSP页面来定义Web模板，以建立一个具有相似外观的页面组成的网站。Java类完成数据提供，在模板中就没有Java代码，这意味着这些模板可以由一个HTML编写人员来维护。 JSP作为当前主流的网页开发技术，具有如下特点：1将内容的生成和显示进行别离：使用JSP技术，Web页面开发人员可以使用HTML或者XML标识来设计和格式化最终的页

5、面。使用JSP标识或者小脚本来生成页面上的动态内容内容是根据请求来变化的。生成内容的逻辑被封装在标识和JavaBeans组件中，并且捆绑在小脚本中，所有的脚本在效劳器端运行。如果核心逻辑被封装在标识和JavaBeans中，那么其他人，如Web管理人员和页面设计者，能够编辑和使用JSP页面，而不影响内容的生成。 2强调可重用的组件：绝大多数JSP页面依赖于可重用的、跨平台的组件来完成使用程序所要求的更为复杂的处理。得益于Java的操作平台无关性，开发人员能够很方便共享和交流执行普通操作的组件，或者使得这些组件为更多的使用者所使用。基于组件的方法加速了总体的开发过程，极大地提高了工程整体开发的效率

6、。 虽然JSP功能强大，但是它要求网页开发人员对Java要相当熟悉。而现在Java程序员还比拟少，对一般的网页开发人员来说，JSP的语法还是比拟难于掌握的。所以，就需要有一种网页开发工具，为一般的网页开发人员提供常用的JSP使用，让只懂得一般页面开发技术HTML的开发人员也能够使用JSP的强大功能。 系统设计目标和使用的主要技术： 1设计目标 本系统的设计目标是为只懂得HTML但完全不了解JSP的一般网页开发人员提供一个网页开发工具，使他们能够根据系统文档，通过标签使用JSP的常用功能，最后生成一个只包含静态HTML和JSP标签的动态JSP网页。 2主要技术 本系统在设计时，主要考虑使用模板和

7、JSP标签的技术来实现。 1、模板技术 模板技术被广泛地使用于各种开发和使用系统中。它预先生成一些常用的框架结构，使用户可以根据自己的需要方便地从模板库中选择模板，而不用自己重新去搭建，节省了用户的开发时间，方便了用户的使用。在本系统中，将页面按照功能类型进行分类，归纳出常用的页面类型，生成模板库。 2、标签库技术 在JSP中，动作是可以创造和访问程序语言对象和影响输出流的元素。JSP定义了六个标准的动作。除了这六个标准动作以外，用户可以定义自己的动作来完成特定的功能。这些动作被称为客户化动作，它们是可重用的程序模块。通过这些动作，程序员就可以在JSP页面中把页面的显示功能也局部地封装起来，使

8、整个页面更加简洁和易于维护。在一个JSP页面中，这些客户化动作是通过客户化标签来调用的。而标签库Tag Library就是客户化标签的集合。 JSP标签库是一种通过JavaBeans生成基于XML的脚本的方法。它是JSP的最大特点之一。通过标签库，能够无限制地扩展JSP使用，完成任何复杂的使用需求。 JSP标签库具有以下特点：易于使用：JSP中的标签和一般的HTML标记外表上是完全一样的，使用起来和普通的HTML标记一样方便。 易于代码重用：标签库中的每一个标签都能完成一定的功能。一旦定义好了一个标签库，只需要把这个标签库包装成一个Jar文件，那么以后只要在别的系统中使用这个标签库就行了，而不

9、用重新开发代码，极大地提高了系统开发效率，降低了开发本钱。 易于代码维护：所有的使用逻辑都封装在标签处理器和JavaBeans中，所有的标签都集中在一个标签库中。如果需要更新代码或者需要修改一个网页上的功能，只需要修改相应的标签即可。通过这种统一维护方式，不用在每个网页上去作修改，极大地减少了维护的工作量，节约了维护本钱。 易于系统扩充：如果需要向系统中添加新的功能，只需要定义一个新的标签来完成这一功能即可，无需对系统的其它方面作任何改动。标签库可以继承JSP标准各方面的特性。这样就可以无限制地扩展和增加JSP的功能，而不需要等待下一版本JSP的出现。系统的组成和实现： 1系统组成 本系统主要

10、由四个局部组成:1、数据库连接局部：本系统支持常用的几个数据库，包括Oracle、Sybase、MSSQLServer、MySQL和DB2，根据用户选择的数据库类型和用户提供的数据库名称、用户名、密码使用JDBC同数据库相连。 2、系统根本表生成局部：和数据库连接以后，根据同数据库相连的用户名生成两个系统根本表TCTables和TCColumns，TCTables表包含在该数据库中属于该用户的所有的表的英文名称、中文名称和一些属性，如是否可修改、是否可查询等；TCColumns表包含在该数据库中属于该用户的所有的表的所有列的中英文名称和其它一些属性。如是否可显示、是否可查询等。这两个系统根本表

11、在整个系统的开发过程中提供用户所使用数据库的根本信息。 3、模板选择和网页生成局部：该局部是系统的核心局部。它包含了两个子模块。 模板选择局部：系统为用户提供模板选择界面，让用户根据需要从模板库中选择所要使用的模板。 模板处理局部：根据用户选择的模板，系统调用指定的模板处理模块对这个模板进行处理。当处理程序遇到模板中的标签时，就为用户提供交互界面，让用户为指定的标签输入参数，并由系统验证用户输入的标签的有效性。最后由系统完成JSP页面的生成。 4、网页预览和修改局部：网页生成出来以后，系统为用户提供了一个网页预览窗口和代码查看修改窗口。通过这个预览窗口，用户可以预览一下生成出来的JSP页面的效

12、果。如果用户对页面的静态方面的效果不太满意，用户可以通过代码查看修改窗口修改代码中的HTML代码。如果用户对页面的静态效果有进一步的要求，系统还为用户提供了一个调用Dreamweaver编辑器的接口，用户可以使用它来对生成出来的JSP页面的静态效果进行进一步的修改和完善。 2系统的实现 1、模板库和标签库的实现 标签库的规划和设计在整个系统设计中至关重要，它关系到了代码重用的程度和系统运行的效率。它的规划应该遵循以下原那么。 1在标签中应该尽量少的包含静态的HTML。对于一般用户来说，标签是透明的。用户不能够查看和修改标签。如果在标签中包含了过多的静态HTML语句，将影响用户对页面的静态效果的

13、修改和完善，限制标签的使用。 2尽量提高代码的重用度。在对JSP使用进行分类是尽量把公用的JSP使用提取出来，形成标签。而不用在每个标签中都重复实现该使用。这样在以后要对该使用进行修改和完善时，只需对这一个标签进行修改即可，易于代码的维护。 3方便用户的使用。在设计标签库时，应该充分考虑到用户的使用情况，使用户能够很容易和方便地理解和使用标签。 标签库的定义：定义一个标签库，必须首先定义一个标签库描述文件TLD。这是一个基于XML的脚本文件，在这个文件中定义了XML的版本、所使用的编码、标签库的版本、所使用的JSP的版本、标签库的名称和这个库中所包含的所有的标签的定义和参数描述，包括标签的名称

14、，标签所对应的Java类，标签的描述信息等。 标签的实现：一个标签就是一个特殊的Java 类，这个类必须继承TagSupport类，这个类是在javaxservletjsptagext包中定义的。在标签类中，包含了这个标签的参数初始化方法SetGet、标签的主体处理方法Handler以及供下一级标签调用的方法等。 模板的实现：一个模板就是一个含有标签引用的JSP文件。为了在模板中引用所定义的标签，必须首先引入标签库。 tagliburi“tagtldprefix“ctag其中uri指定标签库描述文件的路径；prefix指定引用标签时所使用的前缀。 在模板中引用指定的标签时，使用引入标签库时所指

15、定的前缀，指定标签的名称；为标签的参数赋值。 2、系统开发环境 本系统主体程序开发使用的是Borland公司的JBuilder 60，模板开发使用是Microsoft公司的FrontPage2000，标签库开发使用的是UltraEdit编辑器，JDK采用的是JDK14。系统测试环境是JRun30。 Java是未来开发语言的主流，而Java在Web上的主要使用JSP也必将成为未来Web开发的主流技术。本系统采用了JSP的最大特点之一的标签库，使一般的Web开发人员也能够方便地使用JSP强大的动态页面功能，开发出技术先进的JSP动态Web页面。由于本系统采用Java语言进行开发，所以可以在任何支持

16、图形化界面的操作系统下运行，实现了完全的和平台无关。本系统易于扩充和完善。在以后可以考虑为用户提供接口，使用户可以自己扩充模板库和标签库，进一步增强系统的功能。 附件2：外文原文Produce the design of the tool and realize automatically on the basis of JSP webpageIt is an important respect that Internet uses that Web develops technology, and JSP is the most advanced technology that Web is

17、 developed , it is present Web developer's first-selected technology. But because JSP has relatively high expectations for Web developer, a lot of general Web developers can not use this advanced technology . The discussion produces the design of the tool and realizes automatically on the basis

18、of JSP webpage of the template and label storehouse, put forward concrete design philosophy and implementation method .With the popularization of WWW (World Wide Web ), the technology of the dynamic webpage is developed rapidly too. From original CGI (Common Gateway In-terface ) to ASP (Active Serve

19、r Page ), have met the webpage developer to the demand for developing technology of the dynamic webpage to a certain extent. But no matter CGI or ASP have certain limitation, for instance, consuming to resources of the server of CGI, ASP can only be used etc. with Microsoft IIS, all these have limit

20、ed scope of application of the technology, have hindered their popularization greatly. The vast page developers all look forward to a kind of unified page and develop technology earnestly, characteristic that this technology there should be：Have nothing to do with the operating platform, can run on

21、any Web or the application program server ; Show the logic and page of application program that separates ; Offer codes to put in an position, simplify and develop the course based on interactive application program of Web.JSP (Java Server Page ) technology is designed and used for responding to the

22、 request that like this. JSP is developed technology by the new webpage that Sun MicroSystem Company put out in June of 1999, it is that Web based on Java Serv-let and the whole Java system develops technology, and Servlet2. Expansion of 1API. Utilize this technology, can set up advancedly , safely

23、and stepping dynamic websites of the platform .Java is the future mainstream to develop technology , have a lot of advantages . JSP is Java important application technology on Internet/Intranet Web , get extensive support and admit, it can conbine with various kinds of Java technology together intac

24、tly , thus realize very complicated application.As a kind of technology of development based on text , taking showing as centre, JSP has offered all advantages of Java Servlet. Logic function in order to make sure and showing the function was separated , JSP can already work with JavaBeans , Enterpr

25、ise JavaBeans (EJB ) and Servlet . The developer of JSP can finish the work that majority and website's logic are correlated with through using JavaBeans , EJB and Servlet , and only assign the work shown to JSP page to finish. Content and show advantage that logic separate lie in , upgrade pers

26、on , page of appearance needn't understand Java code , the personnel upgrading Javas needn't be experts who design webpage either. This can define Web template in JSP page with Javas , in order to set up websites made up of a page with similar appearance. Java completion data offer, have Jav

27、a code among template, this mean template these can write by one HTML person is it maintain to come.JSP develops technology as the webpage of the mainstream at present, has the following characteristics：(1) Separate the formulation and showing of the content : Using JSP technology, the page develope

28、r of Web can use HTML or XML identification to design and format the final page . Use JSP identification or bound foot turn into dynamic content of page actually (whether content according to is it come change to ask). Produce logic of content of the identification and JavaBeans package , truss up o

29、f the little script encapsulation, all scripts run in the end of the server. If key logic among identification and JavaBeans, then other people, such as Web administrative staff and page designer encapsulation, can edit and use JSP page , and does not influence the formulation of the content . (2) E

30、mphasize the reusable package : Most JSP pages depend on the reusable one, the package stepping the platform finish more complicated treatment with required application program. Benefitting from the independence of operating platform of Java, the developer can be very convenient to share and exchang

31、e and carry out the ordinary package that operated, or make these packages used by more users. The method based on package has accelerated the total development course, the efficiency of improving the project and developing wholly greatly.Though JSP is powerful, it requires the webpage developer sho

32、uld be quite familiar with Java. There are still relatively few Java programmers now, for general webpage developer, the grammar of JSP is more difficult to grasp . So, need a kind of webpage developing instrument and offer commonly used JSP application to general webpage developer, is it understand

33、 general page develop developer of technology (HTML ) can use strong function of JSP too only to let.Systematic design object and main technology of use：(1)Design objectSystem this design object for understand but HTML understand general webpage developer of JSP offer a webpage developing instrument

34、 at all only, enable them to follow the systematic file, use the daily function of JSP through the label, produce one finally and only include static HTML and dynamic JSP webpage of JSP label.(2)Main technologyThis system is in the design, consider using the technology of the template and JSP label

35、to realize mainly.1、Technology of the templateThe technology of the template is widely applied to various kinds of development and application system. It produces some commonly used frame structure in advance , uses the family to choose the template from the template storehouse conveniently accordin

36、g to the needs of one's own one, is it is it put up to go again by oneself to need , save construction period in user , facilitate use of user. In this system , classify the page according to the function type , sum up the commonly used page type, produce the template storehouse.2、Storehouse tec

37、hnology of the labelIn JSP, movements can create and visit the language target of the procedure and influence the element exported and flowed. JSP has defined six standard movements. Except six standard movement these, user can define own movement finish the specific function. These movements are kn

38、own as the customer movement, they are the reusable procedure module . Through movement these, programmer can some encapsulation stand up too display function of page in JSP page, make the whole page more succinct and easier to maintain. In a JSP page, movements were transfered through the customer

39、label in these customers. And the label storehouse (Tag Library ) is the set of the customer label.JSP label storehouse is that one kind produces the method based on script of XML through JavaBeans. It is one of the greatest characteristics of JSP. Through the label storehouse , can expand JSP appli

40、cation unrestrictedly , finish any complicated application demand.JSP label storehouse has the following characteristic： Easy to use: The labels in JSP and general HTML marks are totally the same in appearance, it is as convenient as ordinary HTML mark to use.The easy code is paid most attention to:

41、 Every label in the label storehouse can finish certain function . Define ready to eat one label storehouse , is it pack one Jar file the label storehouse to need only, then only need use this label storehouse in other systems afterwards, needn't develop codes again , has raised the system and d

42、eveloped efficiency greatly, have reduced the development cost. The easy code is safeguarded: All application logic is encapsulated in label processor and JavaBeans, all labels concentrate on a label storehouse. If need to upgrade codes or need to revise the function on a webpage, only need to revis

43、e the corresponding label. Maintain way in unison through this kind , it is unnecessary in each webpage is it is it fix to act as to get onning, have reduce the work load safeguarded greatly, has economized the cost of safeguarding.The easy system is expanded : If need to add the new function to the

44、 system , only need to define a new label to finish this function, do not need to do any change to other respects of the system. Can inherit JSP normal characteristics of various fields in the label storehouse. Can expand and increase the function of JSP unrestrictedly like this, and does not need t

45、o wait for the appearance of the next edition JSP .Systematic composition and realizing：(1)The system making upThis system is made up of four parts mainly：1、The database joins some: This system supports several daily databases , including Oracle, Sybase, MSSQLServer, MySQL and DB2, use JDBC and data

46、base to link to each other according to database type and database name , user name , password that users offer that users choose.2、The basic form of system produces some: After joining with the database , produce the basic form TC-Tables and TC-Columns of two systems according to the user name link

47、ing to each other with the database , TC-Tables form includes English name , Chinese name and some attribute of form belonging to this user in this database , for instance can revise , can inquire about ; The Chinese and English name of the row and some other attribute that TC-Columns form includes

48、belonging to all forms of this user's in this database . For instance can show , can inquire about . Basic information of the database that these basic forms of two systems provide to user's institute for use in the course of development of the whole system. 3、The template is chosen to produ

49、ce some with the webpage: This part is a key part of a system. It includes two pieces of sub module . The template is chosen some: The system offers the template to user and chooses the interface, let users choose the templates used from the template storehouse according to the need. The template is

50、 dealt with some: According to template that user choose, system transfer designated template deal with module is it punish to go on to these template. When dealing with the label that the procedure meets in the template, offer the mutual interface to user, let user input parameter for designated la

51、bel , prove system validity of label that user input. Finished the formulation of JSP page systematically finally.Webpage preview is with revising some: After the webpage was produced out, the system has offered a webpage preview window and code to user and looked over that revises the window. Throu

52、gh this preview window, users can look at the result of JSP page produced out in advance . If user static result of respect in page very satisfied, user can through code look over revise window revise HTML code of code. If users have further demands for the static result of the page, the system has

53、also offered a piece of interface which transfers DreamWeaver editing machine to user, users can use it to carry on further modification and perfection to the static result of JSP page that is produced out .(2)Systematic realization1、Realization of the template storehouse and label storehouseThe pla

54、nning and design of the label storehouse are essential in the whole system design, efficiency that the degree and system that are put in an position have operated that its relation has reached codes. Its planning should follow the following principle .(1) Should try one's best little including s

55、tatic HTML among label. To general user, the label is transparent. Users can not look over and revise labels . If include too many static HT-ML sentence in the label , will influence the modification and perfection of user's static result to the page, limit the use of the label.(2) Try one's

56、 best to raise the paying most attention to degree of the code. Is it is it is it is it is it is it get to JSP public JSP out to withdraw to use to try one's best to classify to go on to use, form labels. Do not use and realize this application repeatedly in each label . While revising and perfe

57、cting to using like this , only need to revise this label, maintenance of the easy code.(3) Facilitate users' use. While designing the label storehouse , should fully consider users' operating position , it can very easy and understanding and using labels conveniently to use the family. Defi

58、nition of the label storehouse: Define a label storehouse, must define a label storehouse and describe the file (TLD ) at first . This is a file of script based on XML, have defined the edition of XML in this file , codes used, the edition , name and definition and parameter of all labels included i

59、n this storehouse of the label storehouse of the edition of the label storehouse , JSP used describe, including the name of the label, corresponding Javas of label, description information of the label ,etc. Realization of the label: One label first special Java type, this each must inherit TagSupports , t