THE TECHNIQUE DEVELOPMENT HISTORY OF JSP
The Java Server Pages( JSP) is a kind of according to web of the script plait 说法语的国家distance technique, similar carries the script language of Java in the rver of the Netscape company of rver- side JavaScript( SSJS) and the Active Server Pages(ASP) of the Microsoft. JSP compares the SSJS and ASP to have better can expand x, and it is no more exclusive than any factory or some one particular rver of Web. Though the norm of JSP is to be draw up by the Sun company of, any factory can carry out the JSP on own system. drumkit
The After Sun relea the JS P( the Java Server Pages) formally, the this kind of new Web application development technique very quickly caud the people's concern. JSP provided a special development environment for the 外语专业Web application that establishes the high dynamic state. According to the Sun parlance, the JSP can adapt to include the Apache WebServer, IIS4.0 on the market at inside of 85% rver product.
This chapter will introduce the related knowledge of JSP and Databas, and JavaBean rel
ated contents, is all certainly rougher introduction among them basic contents, say perhaps to is a Guide only, if the reader needs the more detailed information, pleasing the book of consult the homologous JSP.
1.1 GENER ALIZE
The JSP(Java Server Pages) is from the company of Sun Microsystems initiate, the many companies the participate to the build up the together of the a kind the of dynamic the state web the page technique standard, the it have the it in the construction the of the dynamic state the web page the strong but the do not the especially of the function. JSP and the technique of ASP of the Microsoft is very alike. Both all provide the ability that mixes with a certain procedure code and is explain by the language engine to carry out the procedure code in the code of HTML. Underneath we are simple of carry on the introduction to it.
JSP pages are translated into rvlets. So, fundamentally, any task JSP pages can perform could also be accomplished by rvlets. However, this underlying equivalence do
es not mean that rvlets and JSP pages are equally appropriate in all scenarios. The issue is not the power of the technology, it is the convenience, productivity, and maintainability of one or the other. After all, anything you can do on a particular computer platform in the Java programming language you could also do in asmbly language. But it still matters which you choo.
JSP provides the following benefits over rvlets alone:
• It is easier to write and maintain the HTML. Your static code is ordinary HTML: no extra backslashes, no double quotes, and no lurking Java syntax.
• You can u standard Web-site development tools. Even HTML tools that know nothing about JSP can be ud becau they simply ignore the JSP tags.
• You can divide up your development team. The Java programmers can work on the dynamic code. The Web developers can concentrate on the prentation layer. On large projects, this division is very important. Depending on the size of your team and the comp
lexity of your project, you can enforce a weaker or stronger paration between the static HTML and the dynamic content.
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Now, this discussion is not to say that you should stop using rvlets and u only JSP instead. By no means. Almost all projects will u both. For some requests in your project, you will u rvlets. For others, you will u JSP. For still others, you will combine them with the MVC architecture . You want the apGFDGpropriate tool for the job, and rvlets, by themlves, do not complete your toolkit.
伙计们请起立1.2 SOURCE OF JSP
The technique of JSP of the company of Sun, making the page of Web develop the personnel can u the HTML perhaps marking of XML to design to turn the end page with format. 配料英文U the perhaps small script future life of marking of JSP becomes the dynamic state on the page contents.( the contents changes according to the claim of)慧眼识英雄
The Java Servlet is a technical foundation of JSP, and the large Web applies the develop
ment of the procedure to need the Java Servlet to match with with the JSP and then can complete, this name of Servlet comes from the Applet, the local translation method of now is a lot of, this book in order not to misconstruction, decide the direct adoption Servlet but don't do any translation, if reader would like to, can call it as" small rvice procedure". The Servlet is similar to traditional CGI, ISAPI, NSAPI etc. Web procedure development the function of the tool in fact, at u the Java Servlet hereafter, the customer need not u again the lowly method of CGI of efficiency, also need not u only the ability come to born page of Web of dynamic state in the method of API that a certain fixed Web rver terrace circulate. Many rvers of Web all support the Servlet, even not support the Servlet rver of Web directly and can also pass the additional applied rver and the mold pieces to support the Servlet. katsumiReceive benefit in the characteristic of the Java cross-platform, the Servlet is also a terrace irrelevant, actually, as long as match the norm of Java Servlet, the Servlet is complete to have nothing to do with terrace and is to have nothing to do with rver of Web.busybody Becau the Java Servlet is internal to provide the rvice by the line distance, need not start a progress to the each cherb
laims, and make u of the multi-threading mechanism can at the same time for veral claim rvice, therefore the efficiency of Java Servlet is very high.
