【正文】 nd the improvement of software system more and more frequently, the product of the configuration of B/S embodies more convenient property obviously. For one a little a little bit big unit , if systematic administrator needs , between hundreds of 1000 even last puters round trip run , efficiency and workload is to can imagine, but the configuration of B/S software needs management server have been all right , all customer ends are browser only, need not do any maintenance at all. No matter the scale of user has , is what , has how many branch will not increase any workload of maintenance upgrading , is all to operate needs to aim at server to go on。 It can protect data platform efficiently with management visit limits of authority, server database is also safe. Now in my courtyard, ( Intra ) , outer ( Inter ) with Beijing eastern clear big pany law case and the management software of official business is the structural management software of B/S , policemen each working station in local area work pass through WWW browser can realize working business. Especially in JAVA step platform language appearance after, the configuration management software of B/S is more facilitated , is shortcut, efficient. ( 3 ) The management software technology of main stream. The technology of main stream of management software technology is as management thought , have also gone through 3 develop period. First, interface technology goes to Windows graph interface ( or graph user interface GUI ) from last century DOS character interface, till Browser browser interface 3 differences develop period. Secondly, today own the browser interface of puter, is not only visual and is easy to use , what is more major is that any its style of application software based on browser platform is as, make the requirement of choosing a person for the job for operating training not high and software operability is strong , is easy to distinguish。 Therefore it is systematic that builtin and external user can visit new and existing application , through the logic in existing application system, can expand new application system. This is also present application system develop direction. Traditional C ／ S architecture though adopting is open pattern, but this is the openness that system develops a level , in specific application no matter Client end or Server end the software that need to still specify support. Because of the software software that need to develop different edition according to the different system of operating system that can not offer the structure of C/S and the open environment of user genuine expectation , besides, the renovation of product is very rapid, is nearly impossible to already meet the 100 puter above users of local area work at the same time use. Price has low efficiency high. If my courtyard uses , Shanghai exceed the orchid pany39。s task is to accept the request that Web server controls for database, realization is inquired and modified for database , update etc. function, submit operation result to Web server. Careful analysis is been easy to see , the architecture of Browser/Server of threelayer is the handling of general affairs of the two levels of structure of Client/Server logic modular from the task of client puter in split , from the first floor of individual position bear the pressure of its task and such client puter have alleviated greatly, distribute load balancedly and have given Web server, so from the structural change of Client/server of original two floor the structure of Browser/Server of threelayer. This kind of threelayer architecture following picture shows. This kind of structure not only client puter from heavy burden and the requirement of performance that rises continuously for it in liberation e out , also defend technology people from heavy maintenance upgrading work in free oneself. Since client puter handles general affairs , logic partial minutes have given function server, make client puter right off slender a lot of, do not take the responsibility for handling plex calculation and data again visit etc. crucial general affairs, is responsible to show part, so, maintenance people do not rush about again for the maintenance work of program between every client puter, and put major energy in the program on function server update work. Between this kind of threelayer structural layer and layer, the mutually independent change of any first floor does not affect the function of other layer. has changed the defect of the two levels of architecture of Client/Serv , it is the transform with deep once Bygnksguybb in application systematic architecture. 4 The contrast of two architectures The architecture of Browser/Server and the architecture of Client/Server pare with all advantages that not only have the architecture of Client/Server and also have the architecture of Cli/Server the unique advantage that place does not have: Open standard: The standard adopted by Client/Server only in department unification for but, it39。s task is to suggest by Web browser to the certain a Web server on work that service is asked , after verifying for user identity, Web server delivers needed homepage with HTTP agreement to customer end, client puter accept the homepage file that passed , and show it in Web browser on. Second layer function layer: Have the Web server of the application function of program extension. In function layer contain the systematic handling of general affairs logic, locate in Web server end. It39。 Also, customer one side must also have certain hardware and corresponding customer softw There must be a agreement between server and customer, both sides municate according to this agreement. Apply customer / server model in Inter service , the relation between 2 customer and server i