The existing legal system obstructs the effective electronic commerce manipulation in that the application of electronic data message has changed the traditional way for transaction.

The related laws in various countries and the international legislations have made the special form requirements for data message in the electronic contracts.

commerce the parties communicate with each other through data message instead of traditional paper form.

Design of GPRS-based hydrological data collection system;

In order to edit hydrological data files, a 32-bit editor under WINDOWS has been developed, In this article, the development process, skill and method of 32-bit Editor for hydrology data are presented, also problems that need to be resolved during the data analysis of automatic precipitation recorder and data format conversion are pointed out as well.

Based on published hydrological data, runoff and sediment were calculated for evaluating units by dividing the study area into hydrological polygons, combining hydrological data with the hydrological polygons map, setting up the accumulative relationship between subcatchments and validating the runoff and sediment dat.

The backup accomplishment of groups of data files in application;

In order to edit hydrological data files, a 32-bit editor under WINDOWS has been developed, In this article, the development process, skill and method of 32-bit Editor for hydrology data are presented, also problems that need to be resolved during the data analysis of automatic precipitation recorder and data format conversion are pointed out as well.

The article elaborated on the main techniques involved in the uploading of the local data files to the database of the server, as well as its realization, in J2EE environment, taking the Web browser as the essential client side.