jsp實現(xiàn)在線音樂播放系統(tǒng)畢業(yè)設(shè)計英文文獻(xiàn)及翻譯(編輯修改稿)
2024-12-29 20:57 本頁面
【文章內(nèi)容簡介】 eam. Such nested streams are always buffered, and require explicit flushing to a nesting stream or their contents will be discarded. If the initial out JspWriter object is buffered, then depending upon the value of the autoFlush attribute of the page directive, the content of that buffer will either be automatically flushed out to the ServletResponse output stream to obviate overflow, or an exception shall be thrown to signal buffer overflow. If the initial out JspWriter is unbuffered, then content written to it will be passed directly through to the ServletResponse output stream. A JSP page can also describe what should happen when some specific events occur. In JSP , the only events that can be described are the initialization and the destruction of the page. These events are described using “wellknown method names” in declaration elements.. JavaScript is used for the first kind is browser, the dynamic general purpose of client scripting language. Netscape first proposed in 1995, but its JavaScript LiveScript called. Then quickly Netscape LiveScript renamed JavaScript, Java developers with them from the same issued a statement. A statement Java and JavaScript will plement each other, but they are different, so the technology of the many dismissed the misunderstanding of the two technologies. JavaScript to create user interface control provides a scripting language. In fact, in the browser into the JavaScript code logic. It can support such effect: when the cursor on the Web page of a mobile user input validation or transform image. Microsoft also write out their JavaScript version and the JScript called. Microsoft and Netscape support JavaScript and JScript around a core characteristics and European Manufacturers by (ECMA) standards anization, the control standard of scripting language. ECMA its scripting language ECMAScript named. Servlets and JSPs often include fragments of information that are mon to an anization, such as logos, copyrights, trademarks, or navigation bars. The web application uses the include mechanisms to import the information wherever it is needed, since it is easier to change content in one place then to maintain it in every piece of code where it is used. Some of this information is static and either never or rarely changes, such as an anization39。s logo. In other cases, the information is more dynamic and changes often and unpredictably, such as a textual greeting that must be localized for each user. In both cases, you want to ensure that the servlet or JSP can evolve independently of its included content, and that the implementation of the servlet or JSP properly updates its included content as necessary. You want to include a resource that does not change very much (such as a page fragment that represents a header or footer) in a JSP. Use the include directive in the including JSP page, and give the included JSP segment a .jspf extension. You want to include content in a JSP each time it receives a request, rather than when the JSP is converted to a servlet. Use the jsp:include standard action. You want to include a file dynamically in a JSP, based on a value derived from a configuration file. Use the jsp:include standard action. Provide the value in an external properties file or as a configuration parameter in the deployment descriptor. You want to include a fragment of an XML file inside of a JSP document, or include a JSP page in XML syntax. Use the jsp:include standard action for the includes that you want to occur with each request of the JSP. Use the jsp: element if the include action should occur during the translation phase. You want to includ
公司管理相關(guān)推薦
鄂ICP備17016276號-1