Study And Application Of Distributed Database Development Base On Java Remote Method Invocation Platform

With the development of internet and PC, distributing computing is becoming very popular. Undoubtedly, Internet is changing people's daily life. But one of the problems is that we have to wait for the page because of the bandwidth. Meanwhile, the computer is idle, which is not worthy. But how to use the idle resources of the computer is the problem we have to solve now. Actually, the distributing model is a feasible way.Java provides a very comprehensive API gather . As an programming language that is independence of the underlying system, the application can run on all system with the Java interpreter. This is a significant character. All the application based on network must be running on the all Internet system. Java provides a lot of mechanism that is adapt of network and distribution computation, it includes Socket API and RMI system.RMI simplify programming distribution code, in the RMI application remote Java object can run on the different hosts with Java virtual machine. In this paper,the RMI mechanism is adopted. In the communication all the distribution object is implemented with Java, and with the help of Java implicit security mechanism which includes secure APIs, developer can add lower layer and higher layer security function.This is a significant feature , for baseding on that electric network application should run above all Internet's terraces being living In order to adapt this broad application of database application system and realize sharing data , we adopt multilayer database model . Using to transfer distributed objects , we can move many tasks to client from server to let the server deal with more requests , share in the pressure of the server and promote the efficiency of the database.To realize distributed database ,we mostly use the RMI mechanism and adopt multilayer database model. In the process , using RMI we realize iterative using of some data objects , promote the using efficiency of whole System and reduce the system develop difficulty . Using the model of multilayer database model, weimprove the elasticity and stability of system , at the same time , we join Java security mechanism to insure the secure performance of system.