【正文】 二者可分別稱為前臺(tái)程序與后臺(tái)程序。 C/S 是美國(guó) Borland 公司最早研發(fā)， B/S 是美國(guó)微軟公司研發(fā)。 (3) 管理軟件主流技術(shù)。以目前的技術(shù)看，局域網(wǎng)建立 B/S 結(jié)構(gòu)的網(wǎng)絡(luò)應(yīng)用，并通過 Inter/Intra 模式下數(shù)據(jù)庫(kù)應(yīng)用，相對(duì)易于把握、成本也是較低的。 B/S（ Browser/Server）結(jié)構(gòu)即瀏覽器和服務(wù)器結(jié)構(gòu)。由于沒能提供用戶真正期望的開放環(huán)境， C/S 結(jié)構(gòu)的軟件需要針對(duì)不同的操作系統(tǒng)系統(tǒng)開發(fā)不同版本的軟件， 加之產(chǎn)品的更新?lián)Q代十分快，已經(jīng)很難適應(yīng)百臺(tái)電腦以上局域網(wǎng)用戶同時(shí)使用。它是軟件系統(tǒng)體系結(jié)構(gòu)，通過它可以充分利用兩端硬件環(huán)境的優(yōu)勢(shì)，將任務(wù)合理分配到Client 端和 Server 端來 實(shí)現(xiàn)，降低了系統(tǒng)的通訊開銷。 由此我們選擇 B/S 架構(gòu)作為系統(tǒng)開發(fā)的體系結(jié)構(gòu) 。 Browser/Server 系統(tǒng)的三部分模塊各自相對(duì)獨(dú)立，其中一部分模塊改變時(shí)其它模塊不受影響，系統(tǒng)改進(jìn)變得非常容易，且可以用不同廠家的產(chǎn)品來組成性能更佳的系統(tǒng)。 Browser/Server 用戶的界面都統(tǒng)一在瀏覽器上，瀏覽器 易于使用、界面友好，不須再學(xué)習(xí)使用其它的軟件，一勞永逸的解決了用戶的使用問題。 Browser/Server 所采用的標(biāo)準(zhǔn)都是開放的、非專用的，是經(jīng)過標(biāo)準(zhǔn)化組織所確定的而非單一廠商所制定，保證了其應(yīng)用的通用性和跨平臺(tái)性。由于客戶機(jī)把事務(wù)處理邏輯部分分給了功能服務(wù)器，使客戶機(jī)一下子 “ 苗條 ” 了許多，不再負(fù)責(zé)處理復(fù)雜計(jì)算和數(shù)據(jù)訪問等關(guān)鍵事務(wù)，只負(fù)責(zé)顯示部分，所以維護(hù)人員不再為程序的維護(hù)工作奔波于每個(gè)客戶機(jī)之間，而把主要精力放在功能服務(wù)器上程序的更新工作。它的任務(wù)是接受 Web 服務(wù)器對(duì)數(shù)據(jù)庫(kù)操縱的請(qǐng)求，實(shí)現(xiàn)對(duì)數(shù)據(jù)庫(kù)查詢、修改、更新等功能，把運(yùn)行結(jié)果提交給 Web 服務(wù)器。 在功能層中包含系統(tǒng)的事務(wù)處理邏輯，位于 Web 服務(wù)器端。 在 Browser/Server 三層體系結(jié)構(gòu)下，表示層 (Presentatioon)、功能層 (Business Logic)、數(shù)據(jù)層 (Data Service)被割成三個(gè)相對(duì)獨(dú)立的單元： 第一層 表示層： Web 瀏覽器 。 B/S 體系結(jié)構(gòu)即 Browser/Server，瀏覽器 /服務(wù)器端。因此其結(jié)構(gòu)就變成了新的（ Client 應(yīng)用 +Server 應(yīng)用） /Server 結(jié)構(gòu)。如在進(jìn)行文件傳輸時(shí)，如果把提供文件的一方稱為服務(wù)器，把獲取文件的一方稱為客戶，則在使用get 或 mget 命令從另一個(gè)節(jié)點(diǎn)取文件時(shí)，可以認(rèn)為自己使用的及其是客戶機(jī)，在使用 put 或 mput命令向另一個(gè)節(jié)點(diǎn)發(fā)送文件時(shí)又可以認(rèn)為自己使用的機(jī)器是服務(wù)器。為了能夠提供服務(wù)，服務(wù)器一方必須具有一定的硬件和相應(yīng)的服務(wù)器軟件；同樣，客戶一方也必須具有一定的硬件和相應(yīng)的客戶軟件。如下圖： 從技術(shù)角度講，“客戶機(jī)”和“服務(wù)器”都是邏輯的概念，其含義是：將計(jì)算機(jī)網(wǎng)絡(luò)應(yīng)用分成兩大部分，其中一部分支持多個(gè)用戶共享的功能與資源，它由服務(wù)器來實(shí)現(xiàn)；另一部分是面向每個(gè)用戶的，由客戶機(jī)來實(shí)現(xiàn)，也就是說，客戶機(jī)通常執(zhí)行前臺(tái)功能，通過用戶界面實(shí)現(xiàn)人機(jī)對(duì)話，或是執(zhí)行用戶特定的應(yīng)用程序。 客戶 /服務(wù)器（ Client/Server）模型是一種良好的軟件體系結(jié)構(gòu)，是網(wǎng)絡(luò)的最佳應(yīng)用模式之一。 9 If need differently only, server connection specially , realize longrange maintenance and upgrading and share. So client puter more and more thin , and server more and more fat is the direction of main stream of future informative development. In the future, software upgrading and maintenance will be more and more easy , and use can more and more simple, this is for user manpower , material resources, time and cost save is obvious , it is astonishing. Therefore defend and escalate revolutionary way is the client puter it is thin , is fat server. ( 2 ) Cost reduction, it is more to select. All know windows in the puter of top of a table on nearly one Tong world, browser has bee standard disposition, but on server operating system, windows is in absolute dominance position not. Current tendency is the application management software that uses the configuration of B/S all , need to install only in Linux server on , and safety is high. The so server option of operating system is many, no matter choosing those operating system, can let the most of ones use windows in order to the puter of top of a table of operating system does not get influence, this for make most popular free Linux operating system develop fast, Linux except operating system is free besides, it is also free to link database, this kind of option is very pupular. Say, many persons on daily, Sina website s , so long as having installed browser for can , and what need not know the server of Sina website to use is that what operating system, and in fact the most of websites do not use windows operating system really, but the puter of user is most of as installing to be windows operating system. ( 3 ) Application server operation data load value paratively. Since B/S configures management, software installation in server end ( Server ) on, it is been all right that work administrator need to manage server only, the user interface major logic of general affairs in server ( Server ) end pass through WWW browser pletely realization, lose the logic of general affairs very much in front( Browser) realization, all customer ends has only browser, work administrator need to do hardware maintenance only. But application server operation data load is heavier, once occuring server collapse to wait for problem, 10 consequence is unimaginable. Therefore a lot of units have database to stock server , are ready for any eventuality. 原文翻譯 : 利用 ASP 開發(fā) Web 應(yīng)用程序首先必須確立 Web 應(yīng)用的體系結(jié)構(gòu)。s management software statistics of law case is typical C ／ S architecture management software. ( 2 ) What is the structure of B/S. B/S ( Browser/Server ) structure browser and server structure. It is along with the technology of Inter spring up , it is for the structure of improvement or a kind of change of the structure of C/S. Under this kind of structure, user working interface is to realize through WWW browser, lose the logic of general affairs very much in front( Browser) realization, but the major logic of general affairs in server end( Server) realization, form the threelayer claimed 3tier structure. So, have simplified customer 6 end puter load greatly , have alleviated system to defend workload and the cost with upgrading , have reduced the overall cost of user ( TCO ). With present technology see , local area work the work application that establishes the structure of B/S , and under the pattern of Inter/Intra, database application is easy to hold relatively , cost also is lower. It is that oneness goes to the development of position , can realize different people, never same place, with difference receive the way of entering ( for example LAN, WAN, Inter/Intra etc.) visit and operate mon database。s task is the request concerning accepting user , need to be first conducted and corresponding to expand application program and database to carry out connection , passes through the waies such as SQL to database server to put forward data handling to apply for, then etc. database server the result of handling data submit to Web server, deliver again by Web server to return customer end. The number of plies of 3th according to layer: Database server. In data layer contain systematic data handling logic, locate in database server end. It39。 Another part faces every user , is realized by client puter, also namely, client puter is usual to carry out p