商城购物系统设计中英文对照外文翻译文献
Abstract: Servlet programs run on the server side, ___ CGI-like technologies, Java Servlet has higher efficiency, easier to use, more powerful ns, better portability, and more cost savings.
Keywords: ___, Servlet, HTTP service
1.1 n of Servlet
Servlets are Java programs that run on web or n servers. It is a middleware that connects requests from web browsers or other HTTP client programs and databases or ns on HTTP servers. The work of the servlet is to perform the tasks of the Simeon, as shown in Figure 1.1.
十大开源商城系统
Figure 1.1 The role of web middleware
(1) Read explicit data ___
___ by end users in HTML forms on the page. However, data may also come from applets or custom HTTP client programs. (2) Read implicit request data sent by the browser
Figure 1.1 shows a single arrow from the client to the web server, but in fact, there are two types of data transmitted from the client to the web server, which are explicit data entered by the user in the form and background HTTP n. Both types of data are important. HTTP n includes cookies, media types recognized by browsers, ___.
(3) Generate results
This process may require accessing a database, performing RMI or EJB calls, calling web services, or directly calculating the corresponding response. The actual data may be stored in a nal database. The database may not understand HTTP or may not be able to return results in HTML form, so web browsers ___ with the database. Even if it can do this, for security reasons, we do not want it to do so. Similar ___, we need the web middleware to extract input data from the HTTP stream, communicate with the n, and embed the results into the document.
(4) ___) to users
This document can be sent in us formats, including text (HTML or XML), binary (GIF graphics), ___ underlying formats, such as gzip. However, HTML is the most commonly used format so far, so one of the important tasks of Servlet and JSP is to wrap the results in HTML.

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