| Summary: | [Purpose / Significance] We redesigned the book borrowing and returning function of the Library APP of Liaoning University of Technology to make the APP operate reasonably and run smoothly. Our design provides reference for the independent research and development of library APPs. [Method / Process] The design of foreground on the borrowing APP uses Android Studio as the development tool. The background development tool is Eclipse. The background was applied in the JFinal frame construction. The database is MySQL. MySQL indirectly linked to the Tomcat server. The front ground and background use the C/S pattern. The development language is the Java. The links of background patterns and iconsare of borrowing APP were simplified. [Results / Conclusions] The borrowing APP have been tested on the Android platform and different models of mobile phones. The interface of the borrowing function is clear, the operation is reasonable, and the operation is smooth. The performances of the redesigned APP were superior to those of the current version of our library APP.
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