Based Wap Remote Monitoring System Location Services

With the rapid development of mobile technology, it is possible not still a dream for monitor the object anytime and anywhere. This kind of monitor means a lot to the child in the kind garden or old parents left alone at home. The way of bearer service is based on WAP, With fat server and thin client. Therefore, this system adopts J2EE as development platform. It is suitable to a location services system with abundant contents fast change as well as a great deal of adjustment provided multilayer distributed architecture, support of heterogeneous environment as well as flexible control of affairs.According to development process ,ranging from demands investigation to system implementation are fully developed in the paper.First the technologies on WAP and J2EE involved in location based services are introduced, in which communication model of WAP and application layers and component of J2EE are emphasized,Second two kinds of popular models about implementing services system on J2EE are systematically analyzed. compared to them, model-controller-view pattern is introduced which represents model2.this system is distributed several modules by the way of analyze the function of service and database is designed.Then, conformed to MVC model. user authentication module, urban traffic module, electronic map research module bulletin and message module as well as information management module are implement, At the same time Chinese character encoding, the security of user password, access to heterogonous platform are also resolved successfully.At last representative service models are tested in simulative environment of WAP application service. Strictly according to MVC pattern, The system is implemented based on four layers distributed architecture. JSP+WML is used to create view, Servlet as controller accepts requests from user and transfers different component from model, JavaBean provides data and performs business logic. Compared with traditional model, the three parts of application programmed are independent. the display logic and business logic can be abstractly separated. The Web designed in front and component developed are independent. Components are reused and shared which makes development efficiency.The service models can be developed and operated separately on the platform. Which makes system strong applicability, easy to maintain and easy upgraded. This system has the characteristic of extensibility, flexibility and reuse.Work in this paper provides application value as to meet the needs of getting location information in any time and any where for people.