A general query middleware based on web service

Data query plays an important role in the information application system. Data query in the traditional design method need to be constantly redesigned with the change of user requirements, which increases the workload of system development, reducing development efficiency and software reuse. After abstracting and extracting the common elements of the query, a scalable, flexible configuration, reusable general query middleware based on web service technology is designed. General query middleware consists of two parts. One is the query configuration module for the system designers. Another is the general query module for end-users. System designers and end users need only some simple operations to achieve integrated query function, reducing duplication of code and improving development efficiency.