【正文】 ine of JSP, the page of JSP is the edit and translate type while carry out, not explain the type of. Explain the dynamic state web page development tool of the type, such as ASP, PHP3 etc., because speed etc. reason, have already can39。盡管 JSP 規(guī)范是由 Sun 公司制定的，但任何廠商都可以在自己的系統(tǒng)上實(shí)現(xiàn) JSP。 能夠使用標(biāo)準(zhǔn)的網(wǎng)站開(kāi)發(fā)工具。得益于 Java 的跨平臺(tái)的特性， Servlet 也是平臺(tái)無(wú)關(guān)的，實(shí)際上，只要符合 Java Servlet 規(guī)范， Servlet 是完全與平臺(tái)無(wú)關(guān)且是與 Web 服務(wù)器無(wú)關(guān)的。JSP 把 Java 作為默認(rèn)的腳本語(yǔ)言，然而，就像 ASP 可以使用其他語(yǔ)言 (如 JavaScript 和VBScript)一樣， JSP 規(guī)范也允許使用其他語(yǔ)言 。在腳本環(huán)境中書(shū)寫(xiě)的表達(dá)邏輯被鎖在頁(yè)面內(nèi)，只有通過(guò)剪切和粘貼才能被重用。 Beans 可以是 JavaBeans 或 EJB組件。使用JSP 技術(shù)可以很方便地將一大堆 JSP 頁(yè)面組合成為一個(gè) Web 應(yīng)用程序。 Java 開(kāi)發(fā)者不僅可以創(chuàng)建和使用 JavaBeans，還能在 JSP 頁(yè)中使用 Java 語(yǔ)言來(lái)更精密地控制基于底層 JavaBeans 的表達(dá)邏輯。 JSP 的機(jī)制 要理解 JSP怎樣聯(lián)合以上各種所提到的技術(shù)的優(yōu)點(diǎn)，從而輕而易舉地實(shí)現(xiàn)各種效果，用戶必須首先了解 “組件為中心的網(wǎng)頁(yè)開(kāi)發(fā) ”和 “頁(yè)面為中心的網(wǎng)頁(yè)開(kāi)發(fā) ”的區(qū)別。甚至 ASP(來(lái)自于前述經(jīng)理所在公司的一項(xiàng)產(chǎn)品 )都在 JSP 出現(xiàn)之前推廣了這種方式。使用 JSP 標(biāo)識(shí)或者小腳本來(lái)生成頁(yè)面上的動(dòng)態(tài)內(nèi)容 (內(nèi)容是根據(jù)請(qǐng)求來(lái)變化的 )。問(wèn)題不在于技術(shù)的能力，而是二者在便利性、生產(chǎn)率和可維護(hù)性上的不同。s machine/ server the realm. JavaBeans and ActiveX were published the pany to expand to apply the procedure developer for Java and Windows to use to e to develop the plicated procedure quickly by the fast application procedure development( RAD) tool. These techniques make the expert in the some realm be able to write the module for the perpendicular application plait in the skill area, but the developer can go fetch the usage directly but need not control the expertise of this realm. Be a kind of take module as the central development terrace, the JSP appeared. It with the JavaBeans and Enterprise JavaBeans( EJB) module includes the model of the business and the data logic for foundation, provide a great deal of label and a script terraces to use to e to show in the HTML page from the contents of JavaBeans creation or send a present in return. Because of the property that regards the module as the center of the JSP, it can drive Java and not the developer of Java uses equally. Not the developer of Java can pass the JSP label( Tags) to use the JavaBeans that the deluxe developer of Java establish. The developer of Java not only can establish and use the JavaBeans, but also can use the language of Java to e to control more accurately in the JSP page according to the expression logic of the first floor JavaBeans. 6 See now how JSP is handle claim of HTTP. In basic claim model, a claim directly was send to JSP page in. The code of JSP controls to carry on hour of the logic processing and module of JavaBeanses39。 hand over with each other, and the manifestation result in dynamic state bornly, mixing with the HTML page of the static state HTML code. The Beans can be JavaBeans or module of EJBs. Moreover, the more plicated claim model can see make from is request other JSP pages of the page call sign or Java Servlets. The engine of JSP wants to chase the code of Java that the label of JSP, code of Java in the JSP page even all converts into the big piece together with the static state HTML contents actually. These codes piece was organized the Java Servlet that customer can not see to go to by the engine of JSP, then the Servlet edits and translate them automatically byte code of Java. Thus, the visitant that is the website requests a JSP page, under the condition of it is not knowing, an already born, the Servlet actual full general that prepared to edit and translate pletes all works, very concealment but again and efficiently. The Servlet is to edit and translate of, so the code of JSP in the web page does not need when the every time requests that page is explain. The engine of JSP need to be edit and translate after Servlet the code end is modify only once, then this Servlet that editted and translate can be carry out. The in view of the fact JSP engine auto is born to edit and translate the Servlet also, need not procedure member begins to edit and translate the code, so the JSP can bring vivid sex that function and fast developments need that you are efficiently. Compared with the traditional CGI, the JSP has the equal advantage. First, on the speed, the traditional procedure of CGI needs to use the standard importation of the system to output the equipments to carry out the dynamic state web page born, but the JSP is direct is mutually the connection with server. And say for the CGI, each interview needs to add to add a progress to handle, the progress build up and destroy by burning constantly and will be a not small burden for calculator of be the server of Web. The next in order, the JSP is specialized to develop but design for the Web of, its purp