r圮№rk enviro珈ment based on the B/S framework and the SQL database.The of the system is Java.This thesis put up with a scheme of two developing language levels(oil.contractor)management system based on B/S,with detailed requirement and design,we abide by analysis,system design and security design.During analysis to the the software engineering developing steps and requirement.We pay attention practicality,universality and expansibility.At the same time,thinking much of the developing cost.technique risk,we use the mature technique to analyze,design and realize this system. still take This svstern has some unique characters.First,while other oil fields their assessment by the traditional paper,this system has taken the assessment by is initiate in domestic oil computers.This system employed the electronic seal,which industry.Second,in case of the direct exposing of the password segment,this system the employed MD5(Message.Digest Algorithm 5)encrypt arithmetic,which ensure security of the database. The and stably far.It has covered all system has been working safely SO has 1 36 users,including 1 6 check-up items of the Department of Exploration.It expert level USers.Ithas disposed about 1 thousand assessment.By using this system, the Department of our project team has inspected many items of the subsidiaries of ABSTRACTExploration.The feedbacks are straight all right.The system has been put intopractice in the routine.It has realized informationaliztion and nearly met all theclient’S demands.KEY WORDS:Contractor Performance Management QHSE B/S 南开大学学位论文
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